Source: http://www.google.com/patents/US7118573
Timestamp: 2017-05-29 10:43:07
Document Index: 124020320

Matched Legal Cases: ['application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60', 'application No. 60']

Patent US7118573 - Dynamic anterior cervical plate system having moveable segments ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn anterior cervical plating system includes moveable plate segments to vary the overall length of the plate and allow and/or cause intersegmental compression of vertebral bodies. The plating system is capable of both passive and active dynamization and has the ability to produce the former from the...http://www.google.com/patents/US7118573?utm_source=gb-gplus-sharePatent US7118573 - Dynamic anterior cervical plate system having moveable segments, instrumentation, and method for installation thereofAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7118573 B2Publication typeGrantApplication numberUS 10/160,059Publication dateOct 10, 2006Filing dateJun 4, 2002Priority dateJun 4, 2001Fee statusPaidAlso published asCA2443425A1, CA2443425C, EP1404243A2, EP1404243A4, US7824432, US8834533, US20020183755, US20050085816, US20110054528, WO2002098276A2, WO2002098276A3Publication number10160059, 160059, US 7118573 B2, US 7118573B2, US-B2-7118573, US7118573 B2, US7118573B2InventorsGary K. MichelsonOriginal AssigneeSdgi Holdings, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (108), Non-Patent Citations (12), Referenced by (57), Classifications (17), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetDynamic anterior cervical plate system having moveable segments, instrumentation, and method for installation thereof
US 7118573 B2Abstract
Images(78) Claims(185)
said first and second plate segments being configured to couple together in cooperative relationship so as to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate, said first and second plate segments when attached to the ad scent vertebral bodies, respectively, being adapted to move toward one another in response to movement of the adjacent vertebral bodies toward each other.
2. The plate of claim 1, wherein said first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
3. The plate of claim 1, wherein said first and second plate segments are configured so as to be able to completely restrict movement of said first and second plate segments relative to one another along at least a longitudinal axis of said plate.
4. The plate of claim 1, wherein said first and second plate segments are configured so as to limit separation of said first and second plate segments relative to one another when coupled together.
5. The plate of claim 1, wherein at least one of said first and second plate segments is configured to receive at least a portion of another one of said first and second plate segments therein.
6. The plate of claim 5, wherein at least one of said first and second plate segments has a projection and at least one of said first and second plate segments has a groove configured to receive at least a portion of said projection.
7. The plate of claim 1, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
8. The plate of claim 1, wherein at least a portion of said upper surface of said second plate segment is convex at least in part along at least a portion of the longitudinal axis of said plate.
9. The plate of claim 1, wherein said at least first and second plate segments are configured to cooperate so as to maintain said first and second plate segments generally aligned along the longitudinal axis of said plate.
10. The plate of claim 1, wherein said at least first and second plate segments are configured to cooperate so as to limit movement of said first and second plate segments in a direction generally transverse to the longitudinal axis of said plate.
11. The plate of claim 1, wherein at least a portion of said lower surface of said first plate segment is configured to cooperatively engage at least a portion of said upper surface of said second plate segment.
12. The plate of claim 1, wherein at least a portion of said lower surface of said first plate segment is configured to interdigitate with at least a portion of said upper surface of said second plate segment.
13. The plate of claim 12, wherein said at least a portion of said lower surface of said first plate segment and said at least a portion of said upper surface of said second plate segment include at least one ratchet.
14. The plate of claim 1, wherein at least one of said first and second plate segments is selected from a group of plate segments of various lengths.
15. The plate of claim 1, wherein at least one of said first and second plate segments is selected from a group of plate segments of various configurations.
16. The plate of claim 1, further comprising at least a third plate segment adapted to be connected to at least one of said first and second plate segments to form said plate.
17. The plate of claim 16, wherein said third plate segment is an intermediate plate segment configured to be coupled between at least two plate segments.
18. The plate of claim 16, wherein at least one of said first, second, and third plate segments is selected from a group of plate segments of various lengths.
19. The plate of claim 16, wherein at least one of said first, second, and third plate segments is selected from a group of plate segments of various configurations.
20. The plate of claim 19, wherein said first, second, and third plate segments are selected from a group including end segments and intermediary segments.
21. The plate of claim 20, wherein each of said end segments is configured to connect to one of said end segments and said intermediary segments, and each of said intermediary segments is configured to connect to at least one of said end segments and said intermediary segments.
22. The plate of claim 1, further comprising at least one bone screw, at least one of said first and second plate segments and said bone screw cooperate to lock to said plate said at least one bone screw inserted in said bone screw receiving holes, respectively.
23. The plate of claim 1, further comprising at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
24. The plate of claim 23, wherein said at least one bone screw lock is coupled to said plate.
25. The plate of claim 24, wherein said at least one bone screw lock is removably coupled to said plate.
26. The plate of claim 24, wherein said at least one bone screw lock is adapted to be coupled to said plate prior to the insertion of at least one bone screw into at least one of said bone screw receiving holes.
27. The plate of claim 23, wherein said at least one bone screw lock is configured to move from an initial position that permits the insertion of at least one bone screw into at least one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of at least one of the bone screws to retain the bone screw to said plate.
28. The plate of claim 27, wherein said at least one bone screw lock in the final position covers at least a portion of at least one of said bone screw receiving holes.
29. The plate of claim 27, wherein said at least one bone screw lock is adapted to be rotated from the initial position to the final position.
30. The plate of claim 29, wherein less than a full rotation of said at least one bone screw lock rotates said bone screw lock from the initial position to the final position.
31. The plate of claim 27, wherein at least a portion of said at least one bone screw lock slides from the initial position to the final position.
32. The plate of claim 31, wherein said at least one bone screw lock slides over at least a portion of at least one of said bone screw receiving holes.
33. The plate of claim 32, wherein said at least one bone screw lock slides over at least a portion of at least one bone screw in at least one of said bone screw receiving holes.
34. The plate of claim 23, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
35. The plate of claim 23, wherein said at least one bone screw lock comprises a head that is at least in part circular.
36. The plate of claim 35, wherein said head has at least one cutout segment.
37. The plate of claim 23, further comprising at least one fastener adapted to couple together said first and second plate segments and wherein said at least one bone screw lock is adapted to lock to said plate said at least one fastener.
38. The plate of claim 37, wherein said at least one bone screw lock covers at least a portion of at least one of said bone screw receiving holes and at least a portion of said at least one fastener.
39. The plate of claim 37, wherein said at least one bone screws lock slides over at least a portion of at least one bone screw in at least one of said bone screw receiving holes and at least a portion of said at least one fastener.
40. The plate of claim 1, further comprising at least one fastener adapted to fasten together said first and second plate segments.
41. The plate of claim 40, wherein said fastener is detachably attached to at least one of said first and second plate segments so as to permit assembly of said first and second plate segments by the surgeon and complete uncoupling of said first and second plate segments relative to one another.
42. The plate of claim 40, wherein said fastener is non-detachably attached to at least one of said first and second plate segments so as to prevent complete uncoupling of said first and second plate segments relative to one another.
43. The plate of claim 40, wherein said fastener has a first position adapted to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate.
44. The plate of claim 43, wherein said first and second plate segments move in only a single direction toward one another along the longitudinal axis of said plate when said fastener is in said first position.
45. The plate of claim 43, wherein said fastener has a second position adapted to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
46. The plate of claim 40, wherein said fastener is configured so as to be able to completely restrict movement of said first and second plate segments relative to one another along at least a longitudinal axis of said plate.
47. The plate of claim 40, wherein said fastener passes through at least a portion of said first and second plate segments.
48. The plate of claim 40, wherein said fastener is configured to limit separation of said first and second plate segments relative to one another.
49. The plate of claim 40, wherein said fastener is configured to be tightened to only one of said at least first and second plate segments so as to permit movement of said first and second plate segments relative to one another.
50. The plate of claim 40, wherein said fastener is a part of a mechanism for moving said first and second plate segments relative to one another along a longitudinal axis of said plate.
51. The plate of claim 40, in combination with an instrument configured to cooperatively engage said fastener and at least a portion of at least one of said first and second plate segments so as upon movement of said fastener with said instrument said first and second plate segments move relative to one another along a longitudinal axis of said plate.
52. The plate of claim 51, wherein said fastener is configured to be rotated at least in part by said instrument.
53. The plate of claim 40, wherein said fastener is a screw.
54. The plate of claim 40, where said fastener is at least in part threaded.
55. The plate of claim 40, wherein said fastener has a head.
56. The plate of claim 50, wherein said fastener has a shaft.
57. The plate of claim 1, wherein at least one end of said plate is configured to cooperatively engage a compression tool for movement of at least one vertebral body toward another vertebral body during installation of said plate.
58. The plate of claim 1, wherein said concave part of said lower surface of said first and second plate segment is configured to conform to the anterior aspect of at least a portion of two cervical vertebral bodies.
59. The plate of claim 1, wherein at least a portion of said lower surface of said first and second plate segment is at least in part concave transverse to the longitudinal axis of the plate.
60. The plate of claim 1, wherein at least a portion of said lower surface of said first and second plate segments is roughened to promote the growth of bone along said lower surface.
61. The plate of claim 1, wherein at least a portion of said lower surface of said first and second plate segments comprises a bone ingrowth surface.
62. The plate of claim 1, wherein at least one of said bone screw receiving holes is configured to form an interference fit with at least a portion of the trailing end of a properly dimensioned bone screw to be received therein.
63. The plate of claim 1, wherein at least one of said bone screw receiving holes is configured to hold a bone screw in fixed relationship to said plate.
64. The plate of claim 1, wherein at least one of said bone screw receiving holes is configured to allow a bone screw to be in a moveable relationship to said plate.
65. The plate of claim 1, wherein at least one of said bone screw receiving holes is configured to allow a bone screw to be in a variable angular relationship to said plate.
66. The plate of claim 1, in combination with a fusion promoting substance.
67. The plate of claim 66, wherein said fusion promoting substance is at least in part other than bone.
68. The plate of claim 66, wherein said fusion promoting substance is at least in part bone.
69. The plate of claim 66, wherein said fusion promoting substance is hydroxyapatite.
70. The plate of claim 66, wherein said fusion promoting substance comprises bone morphogenetic protein.
71. The plate of claim 66, wherein said fusion promoting substance comprises genes coding for the production of bone.
72. The plate of claim 1, in combination with a substance for inhibiting scar formation.
73. The plate of claim 1, in combination with an antimicrobial material.
74. The plate of claim 1, wherein said plate is treated with an antimicrobial material.
75. The plate of claim 1, wherein said plate is electrified for purposes of stimulating bone growth and contributing to bone fusion.
76. The plate of claim 40, wherein at least one of said plate and said fastener is electrified for purposes of stimulating bone growth and contributing to bone fusion.
77. The plate of claim 23, further comprising at least one bone screw having a leading end for insertion into the cervical spine and a head opposite said leading end, said at least one bone screw lock adapted to contact said head.
78. The plate of claim 77, wherein said at least one bone screw is configured to be in fixed relationship to said plate.
79. The plate of claim 77, wherein said at least one bone screw is configured to be in a moveable relationship to said plate.
80. The plate of claim 77, wherein at least one bone screw is configured to be in a variable angular relationship to said plate.
81. The plate of claim 77, wherein at least one of said bone screw receiving holes has a reduced dimension proximate said lower surface of said plate to form a seat, said seat having a substantially planar surface adapted to contact a lower surface of one of said bone screws.
82. A plate adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said plate comprising:
a lower surface adapted to contact at least one of the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave at least in part along at least a portion of the longitudinal axis of said plate, at least a portion of said lower surface of said first plate segment is configured to interdigitate with at least a portion of said upper surface of said second plate segment;
said first and second plate segments being configured to couple together in cooperative relationship so as to move in only a single direction toward one another along the longitudinal axis of said plate.
83. The plate of claim 82, wherein sad first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
84. The plate of claim 82, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move toward one another in response to movement of the adjacent cervical vertebral bodies toward each other.
85. The plate of claim 82, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move the adjacent cervical vertebral bodies toward each other in response to movement of said first and second plate segments moving toward each other.
86. The plate of claim 82, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
87. The plate of claim 82, further comprising at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
88. The plate of claim 87, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
89. The plate of claim 82, further comprising at least one fastener adapted to fasten together said first and second plate segments.
90. The plate of claim 82, in combination with a fusion promoting substance.
92. The plate of claim 82, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
93. The plate of claim 82, in combination with a substance for inhibiting scar formation.
94. The plate of claim 82, in combination with an antimicrobial material.
said first and second plate segments being configured to couple together in cooperative relationship so as to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate.
96. The plate of claim 95, wherein said first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
97. The plate of claim 95, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move toward one another in response to movement of the adjacent cervical vertebral bodies toward each other.
98. The plate of claim 95, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move the adjacent cervical vertebral bodies toward each other in response to movement of said first and second plate segments moving toward each other.
99. The plate of claim 95, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
100. The plate of claim 95, further comprising at least one bone screw lack adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
101. The plate of claim 100, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
102. The plate of claim 95, further comprising at least one fastener adapted to fasten together said first and second plate segments.
103. The plate of claim 95, in combination with a fusion promoting substance.
104. The plate of claim 103, wherein said fusion promoting substance includes at least one of bone, hydroxyapatite, bone morphogenetic protein, and genes coding for the production of bone.
105. The plate of claim 95, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
106. The plate of claim 95, in combination with a substance for inhibiting scar formation.
107. The plate of claim 95, in combination with an antimicrobial material.
108. A plate adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said plate comprising:
a lower surface adapted to contact at least one of the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave at least in part along at least a portion of the longitudinal axis of said plate, at least a portion of said lower surface of said first plate segment being configured to interdigitate with at least a portion of said upper surface of said second plate segment, said at least a portion of said lower surface of said first plate segment and said at least a portion of said upper surface of said second plate segment including at least one ratchet configured to permit movement of said first and second plate segments toward one another in a first direction along a longitudinal axis of said plate and to restrict movement in a direction opposite to said first direction;
109. The plate of claim 108, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move toward one another in response to movement of the adjacent cervical vertebral bodies toward each other.
110. The plate of claim 108, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move the adjacent cervical vertebral bodies toward each other in response to movement of said first and second plate segments moving toward each other.
111. The plate of claim 108, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
112. The plate of claim 108, further comprising at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
113. The plate of claim 112, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
114. The plate of claim 108, further comprising at least one fastener adapted to fasten together said first and second plate segments.
115. The plate of claim 108, in combination with a fusion promoting substance.
116. The plate of claim 115, wherein said fusion promoting substance includes at least one of bone, hydroxyapatite, bone morphogenetic protein, and genes coding for the production of bone.
117. The plate of claim 108, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
118. The plate of claim 108, in combination with a substance for inhibiting scar formation.
119. The plate of claim 108, in combination with an antimicrobial material.
120. A system adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said system comprising:
said first and second plate segments being configured to couple together in cooperative relationship so as to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate;
an interbody spinal fusion implant; and
a fusion promoting substance.
121. The plate of claim 120, wherein said first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
122. The plate of claim 120, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move toward one another in response to movement of the adjacent cervical vertebral bodies toward each other.
123. The plate of claim 120, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move the adjacent cervical vertebral bodies toward each other in response to movement of said first and second plate segments moving toward each other.
124. The plate of claim 120, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
125. The plate of claim 120, further comprising at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
126. The plate of claim 125, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a clip, and a cover.
127. The plate of claim 120, further comprising at least one fastener adapted to fasten together said first and second plate segments.
128. The plate of claim 120, wherein said fusion promoting substance includes at least one of bone, hydroxyapatite, one morphogenetic protein, and genes coding for the production of bone.
129. The plate of claim 120, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
130. The plate of claim 120, in combination with a substance for inhibiting scar formation.
131. The plate of claim 120, in combination with an antimicrobial material.
132. The plate of claim 120, wherein said implant comprises at least in part bone.
133. The plate of claim 120, wherein said implant is an allograft interbody bone graft implant.
134. The plate of claim 120, wherein said implant is an artificial implant.
135. A system adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said system comprising:
a lower surface adapted to contact at least one of the cervical vertebral bodies and an upper surface opposite said lower surface said lower surface being concave at least in part along at least a portion of tile longitudinal axis of said plate;
said first and second plate segments being configured to couple together in cooperative relationship so as to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate, said first and second plate segments when attached to the adjacent vertebral bodies, respectively, being adapted to move toward one another in response to of the adjacent cervical vertebral bodies toward each other; and
bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
136. The plate of claim 135, wherein said first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
137. The plate of claim 135, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
138. The plate of claim 135, further comprising at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
139. The plate of claim 138, wherein said at least one bone screw lock composes at least one of a screw, a rivet, a cap, and a cover.
140. The plate of claim 135, further comprising at least one fastener adapted to fasten together said first and second plate segments.
141. The plate of claim 135, in combination with a fusion promoting substance.
142. The plate of claim 141, wherein said fusion promoting substance includes at least one of bone, hydroxyapatite, bone morphogenetic protein, and genes coding for the production of bone.
143. The plate of claim 135, in combination with a substance for inhibiting scar formation.
144. The plate of claim 135, in combination with an antimicrobial material.
145. The plate of claim 135, wherein said bioresorbable material is at least in part bone.
146. A system adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said system comprising:
said first and second plate segments being configured to couple together in cooperative relationship so as to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate, said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move toward one another in response to movement of the adjacent cervical vertebral bodies toward each other; and
147. The plate of claim 146, wherein said first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
148. The plate of claim 146, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
149. The plate of claim 146, further comprising at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
150. The plate of claim 149, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
151. The plate of claim 146, further comprising at least one fastener adapted to fasten together said first and second plate segments.
152. The plate of claim 146, in combination with a fusion promoting substance.
154. The plate of claim 146, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
155. The plate of claim 146, in combination with a substance for inhibiting scar formation.
156. The plate of claim 146, in combination with an antimicrobial material.
157. A system adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said system comprising:
at least one bone screw receiving hole extending horn said upper surface through said lower surface, each of said bone screw receiving holes adapted to overlie one of the cervical vertebral bodies and being adapted to receive at least one bone screw for engaging the cervical vertebral body to attach said plate to the cervical spine;
said first and second plate segments being configured to couple together in cooperative relationship so as to facilitate movement of said first and second plate segments in a direction toward one another along the longitudinal axis of said plate and to resist movement of said first and said second plate segments in a direction away from one another along the longitudinal axis of said plate; and
at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively, at least one of said plate and said bone screw lock being electrified for purposes of stimulating bone growth and contributing to bone fusion.
158. The plate of claim 157, wherein said first and second plate segments are configured to limit movement of said first and second plate segments relative to one another along the longitudinal axis of said plate.
159. The plate of claim 157, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move toward one another in response to movement of the adjacent cervical vertebral bodies toward each other.
160. The plate of claim 157, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to move the adjacent cervical vertebral bodies toward each other in response to movement of said first and second plate segments moving toward each other.
161. The plate of claim 157, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
162. The plate of claim 157, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
163. The plate of claim 157, further comprising at least one fastener adapted to fasten together said first and second plate segments.
164. The plate of claim 157, in combination with a fusion promoting substance.
165. The plate of claim 164, wherein said fusion promoting substance includes at least one of bone, hydroxyapatite bone morphogenetic protein, and genes coding for the production of bone.
166. The plate of claim 157, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
167. The plate of claim 157, in combination with a substance for inhibiting scar formation.
168. The plate of claim 157, in combination with an antimicrobial material.
169. A plate adapted to be applied to the anterior human cervical spine for contacting the anterior aspects of at least two adjacent cervical vertebral bodies to be fused together, said plate comprising:
at least one bone screw lock adapted to lock to said plate at least one bone screw inserted in said bone screw receiving holes, respectively.
170. The plate of claim 169, wherein said first and second plate segments when attached to the adjacent vertebral bodies, respectively, are adapted to maintain a compressive load across a disc space between the adjacent cervical vertebral bodies.
171. The plate of claim 169, wherein said at least one bone screw lock is removably coupled to said plate.
172. The plate of claim 169, wherein said at least one bone screw lock is adapted to be coupled to said plate prior to the insertion of at least one bone screw into at least one of said bone screw receiving holes.
173. The plate of claim 169, wherein said at least one bone screw lock is configured to move from an initial position that permits the insertion of at least one bone screw into at least one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of at least one of the bone screws to retain the bone screw to said plate.
174. The plate of claim 173, wherein said at least one bone screw lock is adapted to be rotated from the initial position to the final position.
175. The plate of claim 174, wherein less than a full rotation of said at least one bone screw lock rotates said bone screw lock from the initial position to the final position.
176. The plate of claim 173, wherein at least a portion of said at least one bone screw lock slides from the initial position to the final position.
177. The plate of claim 169, wherein said at least one bone screw lock comprises at least one of a screw, a rivet, a cap, and a cover.
178. The plate of claim 169, further comprising at least one fastener adapted to fasten together said first and second plate segments.
179. The plate of claim 169, wherein at least a portion of said lower surface of said first plate segment is configured to interdigitate with at least a portion of said upper surface of said second plate segment.
180. The plate of claim 179, wherein said at least a portion of said lower surface of said first plate segment and said at least a portion of said upper surface of said second plate segment include at least one ratchet.
181. The plate of claim 169, wherein at least one of said first and second plate segments is configured to receive at least a portion of another one of said first and second plate segments therein.
182. The plate of claim 169, further comprising at least third plate segment adapted to be connected to at least one of said first and second plate segments to form said plate.
183. The plate of claim 169, in combination with a fusion promoting substance.
184. The plate of claim 183, wherein said fusion promoting substance includes at least one of bone, hydroxyapatite, bone morphogenetic protein, and genes coding for the production of bone.
185. The plate of claim 169, further comprising bone screws for engaging said plate to the cervical spine, wherein at least a portion of one of said plate and said bone screws is a bioresorbable material.
This application claims the benefit of provisional application No. 60/379,589, filed May 9, 2002; and provisional application No. 60/377,916, filed May 3, 2002; provisional application No. 60/356,318, filed Feb. 12, 2002; provisional application No. 60/355,194, filed Feb. 8, 2002; provisional application No. 60/296,681, filed Jun. 6, 2001; provisional application No. 60/296,680, filed Jun. 6, 2001; provisional application No. 60/296,060, filed Jun. 4, 2001; provisional application No. 60/296,059, filed Jun. 4, 2001; all of which are incorporated by reference herein.
In another preferred embodiment of the present invention, the plate segments are articulated in such a way that even the one freedom of movement that is along the longitudinal axis of the plate is selectively limited to the desired passive dynamization that is shortening of the plate construct. This preferred embodiment of the present invention will shorten as required to maintain loaded contact of the bone portions to be fused, and if challenged, resist any forces such as those that would accompany cervical extension that would distract or destabilize the construct by elongating it. A further benefit of this embodiment is its ability to store and impart a compressive load across the fusion site referred to herein as “active dynamization” wherein energy stored in the system shortens the plate construct if conditions permit. This load can be applied by the surgeon at the time of surgery and/or be produced during the healing phase by harnessing the compressive loads such as occur randomly with neck motion. Compressive load within a physiological range has been shown to have a beneficial effect on the healing of bone. The induction of a compressive load across vertebral bodies to be fused, induces bone growth and when bone resorption occurs at the interface of the graft or implant and the vertebral bodies to be joined, those vertebral bodies are urged to move closer together, thus avoiding the formation of a gap therebetween and thereby acting to mitigate against pseudoarthrosis.
FIG. 3C is a top plan view of the plate, fastener, and locking elements of FIGS. 1C and 1D.
FIG. 5A is an end view of the plates of FIGS. 1A–1D.
FIG. 9A is an enlarged fragmentary cross sectional view of an embodiment of the ratchetings in the upper and lower portions of the plates of FIGS. 1A–1D in a first position.
FIG. 15A is a partial cross sectional view along line 15A—15A of FIG. 14A for the plate of FIG. 1A.
FIG. 15B is a partial cross sectional view along line 15A—15A of FIG. 14A for the plate of FIG. 1B.
FIG. 15C is a partial cross sectional view along line 15C—15C of FIG. 14C for the plate of FIG. 1C.
FIG. 15D is a partial cross sectional view along line 15C—15C of FIG. 14C for the plate of FIG. 1D.
FIG. 20A is a partial cross sectional view along line 20A—20A of the plate of FIG. 17A.
FIG. 20B is a partial cross sectional view along line 20A—20A of FIG. 17A of a plate and fastener in accordance with another preferred embodiment of the present invention.
FIG. 28A is a cross sectional view transverse to the longitudinal axis of the plate of FIGS. 27A–27D.
FIG. 36C is a top plan view of the plates in an elongated position, fasteners, and locking elements of FIGS. 30C and 30D. FIG. 37A is a top perspective view of one of the plates of FIGS. 30A and 30B and another preferred embodiment of instrumentation for compressing the plate and instrumentation for locking the fastener in accordance with the present invention.
FIGS. 9A and 10A show an embodiment of ratchetings having a configuration that is useful if no movement of first and second segments 102 a, 104 a is desired after fastener 106 a is tightened. A preferred angular relationship of the cross section of ratchetings 152 a 1 is a 45-45-90 degree triangular relationship. As shown in FIG. 9A, in a first position, the peaks and valleys of ratchetings 152 a 1 are cooperatively mating. Ratchetings 152 a 1 permit for the fixed positioning of first and second segments 102 a, 104 a relative to one another to create a selected length of plate 100 a. As shown in FIG. 10A, the peaks and valleys are separated to permit movement of the first and second segments in the directions of the arrows along the longitudinal axis of plate 100 a. In order for first and second segments 102 a, 104 a to move relative to one another, there must be sufficient freedom of movement for the segments to move apart in order to clear the height of the peaks of ratchetings 152 a 1. Accordingly, in a preferred embodiment fastener 106 a is configured to have at least one position that permits movement of the first and second segments along the longitudinal axis of plate 100 a as well as along an axis transverse to the longitudinal axis of plate 100 a such that ratchetings 152 a can move apart. Fastener 106 a can be tightened to a second position to resist or prevent movement of segments 102 a, 104 a relative to one another. For example, movement of segments 102 a, 104 a can be resisted in a direction along at least a portion of the longitudinal axis of plate 100 a. FIGS. 11A and 12A show another preferred embodiment of ratchetings 152 a 2 having a forward-facing configuration for permitting movement in a single direction. The configuration of ratchetings 152 a 2 is useful when movement of first and second segments 102 a, 104 a is desired to permit further shortening of the plate. A preferred angular relationship of the triangular cross section of ratchetings 152 a 2 is a 30-60-90 degree triangular relationship. As shown in FIG. 12A, due to the forward facing angle of ratchetings 152 a 2, sliding movement of first and second segments 102 a, 104 a in the direction, as indicated by the arrow, along the longitudinal axis of plate 100 a is facilitated by the ramped surface 154 a. In contrast, sliding movement in the opposite direction is restricted by vertical wall 156 a. Movement of segments 102 a, 104 a is limited to a single direction with ratchetings 152 a 1 and by limiting the separation of segments 102 a, 104 a along an axis transverse to the longitudinal axis of plate 100 a with fastener 106 a or 106 a′.
FIGS. 47 a–47 d show preferred embodiments of locking elements for locking bone screws in accordance with the present invention. For example, the bone screw locks may be in the form of a screw, a rivet, a cap, or a cover. It is appreciated that any locking element for locking a single one of the bone screws known to one of ordinary skill in the art would be within the scope of the present invention.
FIG. 47 a shows an enlarged fragmentary cross sectional view of a locking element 172 a 1 and a bone screw 174 a 1. Locking element 172 a 1 threadably engages bone screw receiving hole 126 a to prevent bone screw 174 a 1 from backing out. In this embodiment, locking element 172 a 1 locks bone screw 174 a 1 in a fixed relationship to plate 100 a. FIG. 47 b is an enlarged fragmentary cross sectional view of a locking element 172 a 2 and a bone screw 174 a 2. Locking element 172 a 2 threadably engages bone screw receiving hole 126 a to prevent bone screw 174 a 2 from backing out. In this embodiment, locking element 172 a 2 is adapted to hold bone screw 174 a 2 in an angular relationship to plate 100 a. Examples of preferred fixed-angled single locking elements are taught by Michelson in U.S. Pat. No. 6,139,550, (the '550 patent) entitled “Skeletal Plating System,” the disclosure of which is hereby incorporated by reference herein. Locking element 172 a 2 may also permit movement of bone screw 174 a 2 relative to plate 100 a. FIGS. 47 c and 47 d are enlarged fragmentary cross sectional views of a locking element 172 a 3 and bone screw 174 a 3 in accordance with another embodiment of the present invention. Locking element 172 a 3 threadably engages bone screw receiving hole 126 a to prevent bone screw 174 a 3 from backing out. In this embodiment, locking element 172 a 3 is adapted to hold bone screw 174 a 3 in an angular relationship to plate 100 a. Locking element 172 a 3 may also permit movement of bone screw 174 a 3 relative to plate 100. Locking element 172 a 3 is adapted to adjustably lock bone screw 174 a 3 in a variable angle relationship relative to plate 100 a. Bone screw 174 a 3 preferably has a rounded head 176 a 3 that cooperates with the bottom surface of single locking element 172 a 3, thus allowing screw 174 a 3 to move relative to plate 100 a. Examples of preferred variable-angled single locking elements are taught by Michelson in the '550 patent the disclosure of which is hereby incorporated by reference herein.
FIGS. 1B, 2B, 4B, 7B, 8B, and 15B show another preferred embodiment of a cervical plate 100 b in accordance with the present invention. In this preferred embodiment of the present invention, plate 100 b may include at least one bone screw lock adapted to lock to the plate only a single bone screw inserted into one of bone screw receiving holes 126 b such as described above in relation to plate 100 a and a non-detachable fastener 106 b configured to couple together first and second segments 102 b, 104 b. Fastener 106 b is configured to be non-detachably attached to at least one of first and second segments 102 b, 104 b to couple together two or more plate segments. Fastener 106 b is non-detachable to prevent non-destructive complete uncoupling of first and second segments 102 b, 104 b from one another during normal use. As used herein, “non-detachable fastener” is defined as a fastener that once attached is not meant to be removed and then reattached. As shown in FIG. 7B, fastener 106 b, for example, may be embodied in the form of a rivet having a head 108 b, 0 a shaft 112 b, and a base 114 b. By way of example only and not limitation, base 114 b may be coupled to second segment 104 b so that it is permanently attached, but is still capable of an element of rotation about its longitudinal axis. Shaft 112 b of fastener 106 b preferably has a thread 116 b. Fastener receiving opening 148 b of plate 100 b is configured to permit non-detachable attachment of fastener 106 b while permitting an element of rotation of fastener 106 b about its longitudinal axis. For example as shown in FIG. 2B, the bottom portion of fastener receiving opening 148 b proximate lower surface 140 b of second segment 104 b may have a smaller dimension than the maximum dimension of base 114 b (e.g. flared portion of a rivet) of fastener 106 b so as to prevent passage of the end portion therethrough. Moreover, the bottom portion of fastener receiving opening 148 b may be beveled to accommodate base 114 b (e.g. flared portion) of fastener 106 b so that it is generally flush or recessed to the bottom surface and preferably does not impede close contact of lower surface 140 b with the surface of the vertebral bodies. The first and second plate segments may be modular components of various configurations assembled by the manufacturer of the plate and provided to the surgeon in an assembled state. In the assembled state, the plate has a non-detachable fastener that prevents non-destructive complete uncoupling of the first and second segments during normal use.
FIGS. 23A, 24A, 25A, and- 26A show a preferred embodiment of instrumentation 400 a used for compressing and locking plate 300 a. Instrumentation 400 a has a working end 402 a configured to cooperatively engage fastener receiving opening 330 a and fastener 306 a. After segments 302 a, 304 a have been attached to the adjacent vertebral bodies with an appropriate fastening element, such as bone screws, instrument 400 a can be used to move segments 302 a, 304 a toward one another to shorten the length of plate 300 a, create a compressive load across the disc space, and concurrently tighten fastener 306 a (if desired) to secure first and second segments 302 a, 304 a in a preferred position. Working end 402 a of instrument 400 a preferably has a driver portion 404 a configured to cooperatively engage driver receiving opening 364 a in fastener 306 a. Driver portion 404 a is preferably hex-shaped. Working end 402 a preferably has a pin 406 a extending therefrom and displaced from driver portion 404 a to engage one of pin receiving recesses 362 a 1 and 362 a 2, respectively, when driver portion 404 a is engaged with driver receiving opening 364 a in fastener 306 a. With driver portion 404 a engaging fastener 306 a and pin 406 a inserted in pin receiving recess 362 a 2 as shown in FIG. 25A, instrument 400 a rotates fastener 306 a in the direction of arrow A as shown in FIG. 26A to move first segment 302 a toward second segment 304 a in the direction of arrow B to reduce the length of plate 300 a and can if desired concurrently tighten fastener 306 a. The configuration of plate 300 a provides for an internal compression mechanism that can be operated by a driver instrument eliminating the need for an externally applied compression apparatus for shortening plate 300 a and creating a compressive load.
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format text: MERGER;ASSIGNOR:SDGI HOLDINGS, INC.;REEL/FRAME:018471/0824Effective date: 20060428Owner name: WARSAW ORTHOPEDIC, INC.,INDIANAFree format text: MERGER;ASSIGNOR:SDGI HOLDINGS, INC.;REEL/FRAME:018471/0824Effective date: 20060428Jul 8, 2008CCCertificate of correctionApr 12, 2010FPAYFee paymentYear of fee payment: 4Apr 10, 2014FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services