Source: https://patents.google.com/patent/CA3024804A1/en
Timestamp: 2019-11-19 18:59:47
Document Index: 354404386

Matched Legal Cases: ['art 929', 'art 929', 'arts 929', 'art 929', 'art 929', 'art 929', 'art 929', 'arts 929', 'art 929', 'art 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'arts 929', 'art 929', 'art 929', 'art 929', 'art 929', 'art 929', 'art 929', 'arts 929', 'arts 929']

CA3024804A1 - Orthopedic fusion plate and compression screw - Google Patents
CA3024804A1
CA3024804A1 CA3024804A CA3024804A CA3024804A1 CA 3024804 A1 CA3024804 A1 CA 3024804A1 CA 3024804 A CA3024804 A CA 3024804A CA 3024804 A CA3024804 A CA 3024804A CA 3024804 A1 CA3024804 A1 CA 3024804A1
CA3024804A
2013-10-15 Priority to CA2883745A priority patent/CA2883745C/en
2014-06-05 Publication of CA3024804A1 publication Critical patent/CA3024804A1/en
238000007906 compression Methods 0 abstract claims description title 193
, , ORTHOPEDIC FUSION PLATE AND COMPRESSION SCREW
61/730,433, filed November 27, 2012 and entitled "ORTHOPEDIC FUSION PLATE AND
COMPRESSION SCREW". This application also claims priority on U.S. Application Serial No. 13/828,358 filed on March 14, 2013, entitled "ORTHOPEDIC FUSION PLATE AND
COMPRESSION SCREW".
Additionally, in some embodiments, the first end includes a top surface, and the thickened region extends in a generally upward direction away from the top surface, such that the thickened region extends farther away from the bone parts than the top surface when the fusion plate is implanted substantially adjacent to the bone parts.
In one such embodiment, the second thickness is at least approximately 1.0 millimeters greater than the first thickness.
The present invention is further directed toward a combination comprising the fusion plate as described above, and a compression attacher, e.g., a compression screw, that extends through the compression aperture, the compression attacher being adapted to extend into the first bone part and the second bone part when the fusion plate is implanted substantially adjacent to the bone parts. In one embodiment, the compression
2 attacher includes (i) a threaded region including a plurality of threads having a threaded width, and (ii) an attacher width, and wherein the threaded width is greater than the attacher width.
Further, in one application, the present invention is further directed toward a combination for compressing bone material at an interface between a first bone part and a second bone part, combination comprising (A) a fusion plate including (i) a first end having a top surface and a first thickness, (ii) an opposed second end that is spaced apart from the first end, (iii) a thickened region that is positioned within a middle region substantially between the first end and the second end, the thickened region extending in a generally upward direction away from the top surface, such that the thickened region extends farther away from the bone parts than the top surface when the combination is implanted substantially adjacent to the bone parts, the thickened region having a second thickness that at least approximately 1.0 millimeters greater than the first thickness, and (iv) a compression aperture that extends through the thickened region at a compression angle of between approximately thirty and fifty-five degrees relative to the planar axis;
and (B) a compression screw that extends through the compression aperture, the compression screw being adapted to extend into the first bone part and the second bone part when the combination is implanted substantially adjacent to the bone parts.
3 , , BRIEF DESCRIPTION OF THE DRAWINGS
Figure 8F is an enlarged view of a portion of the compression attacher as indicated by circle and arrow F-F in Figure 8B;
Figure 9 is a simplified schematic illustration of a first bone part, a second bone part, and an embodiment of the fusion plate, the fixation attachers and the compression
4 attacher having features of the present invention that are utilized to hold the bone parts together;
Figure 14A is a top view of still yet another embodiment of a fusion plate having features of the present invention, and a plurality of fixation attachers and a compression attacher that can be used with the fusion plate; and Figure 14B is a sectional view of the fusion plate, the fixation attachers and the compression attacher taken on line B-B in Figure 14A.
Figure 1 is a top view of an embodiment of a fusion plate 10 having features of the present invention. The design of the fusion plate 10 can be varied. As shown in Figure 1, the fusion plate 10 can include a first end 12, an opposed second end 14, and a middle region 16 that extends between and connects the first end 12 and the second end 14.
Additionally, in this embodiment, the fusion plate 10 includes (i) one or more first fixation apertures 18 positioned near the first end 12 of the fusion plate 10 (two are illustrated in Figure 1) with any appropriate positioning relative to one another, wherein each first fixation aperture 18 may extend at a slight angle completely through the fusion plate 10;
(ii) one or more second fixation apertures 20 positioned near the second end 14 of the fusion plate 10 (two are illustrated in Figure 1) with any appropriate positioning relative to one another, wherein each second fixation aperture 20 may extend at a slight angle completely through the fusion plate 10; and (iii) a compression aperture 22 positioned within the middle region 16 of the fusion plate 10, the compression aperture 22 extending at a compression angle 224 (illustrated in Figure 2) completely through the fusion plate 10.
It should be noted that the use of the terms "first" and "second" to describe the ends and fixation apertures of the fusion plate 10 is merely for purposes of illustration and ease of description and is not intended to be limiting in any manner. Further, either end and/or either fixation apertures can equally be titled as "first" or "second"
without altering the breadth and scope of the present invention Additionally, it should be noted that as utilized herein, the concept of the apertures 18, 20, 22 extending completely through the fusion plate 10 signifies that the apertures 18, 20, 22 extend through both a top surface 26 and a bottom surface 28 (illustrated most clearly in Figure 5) of the fusion plate 10. Further, as utilized herein, the top surface 26 is the surface of the fusion plate 10 that faces away from the bones or bone parts, e.g., a first bone part 929A and a second bone part 929B (illustrated in Figure 9), when the fusion plate 10 is implanted, and the bottom surface 28 is the surface of the fusion plate 10 that faces toward the bone parts 929A, 929B when the fusion plate 10 is implanted.
Further, the number of first fixation apertures 18 and the number of second fixation apertures 20 can be varied. For example, as illustrated in Figure 1, the fusion plate 10 can include two first fixation apertures 18 and two first fixation apertures 20. Alternatively, the fusion plate 10 can include greater than two or less than two first fixation apertures , , 18 (e.g., zero, one or three first fixation apertures 18); and/or the fusion plate 10 can include greater than two or less than two second fixation apertures 20 (e.g., zero, one or three second fixation apertures 20).
For example, (i) the fixation attachers 30 that are threaded through and/or extend through the first fixation apertures 18 can be threaded into the first bone part 929A;
(ii) the fixation attachers 30 that are threaded through and/or extend through the second fixation apertures 20 can be threaded into the second bone part 929B; and (iii) the compression attacher 32 that is threaded through and/or extends through the compression aperture 22 can be threaded into both the first bone part 929A and the second bone part 929B.
Additionally, the fusion plate 10 is designed to enable the effective compression and/or to increase the compression of bone material at a bone interface between the bone parts 929A, 929B. This compression is accomplished by extending the compression attacher 32, e.g., the compression screw, through the compression aperture 22 at the compression angle 224 and into the bone parts, i.e. into both the first bone part 929A and the second bone part 929B, to compress the bone parts 929A, 929B together.
Further, the fusion plate 10 is designed to provide increased stability in the bone parts 929A, 929B relative to one another such as to cause fusion. Importantly, the fusion plate 10 is able to accomplish these goals without the need for removal of any bone material to allow for the proper implantation, installment or insertion of the fusion plate 10.
Moreover, as detailed herein below, the fusion plate 10 further includes one or more plate lifters 434 (illustrated in Figure 4) along the bottom surface 28 of the fusion plate 10, which have a unique buttress design for relieving compression along the surfaces of the bone parts 929A, 929B, but which engage into the bone parts 929A, 929B and help fix the bone parts 929A, 929B in place for successful fusion.
, , Further, in certain embodiments, the compression attacher 32 can have threads (illustrated in Figure 8A) that are larger than the head 836. In such embodiments, threads 40 can be formed into the compression aperture 22 to accommodate the size of the threads 838 of the compression attacher 32, and the smaller head 836 can be allowed to pass completely through the compression aperture 22 when and if desired, e.g., if the fusion plate 10 is to be removed, but it is desired to maintain the compression attacher 32 implanted within the bone parts 929A, 929B.
Further, as shown in Figure 1, the fusion plate 10 can have a longitudinal axis 42, and a portion of the fusion plate 10, e.g., the second end 14 of the fusion plate 10, can further be angled at a valgus angle 44 relative to the longitudinal axis 42 to compensate for any valgus deformities that may exist in the bone parts 929A, 929B into and/or adjacent to which the fusion plate 10 is implanted. For example, in certain embodiments, the fusion plate 10 can have a valgus angle 44 of between approximately zero and fifteen degrees relative to the longitudinal axis 42. More specifically, in certain non-exclusive alternative embodiments, the fusion plate 10 can have a valgus angle 44 of approximately two, four, six, eight, ten, twelve or fourteen degrees relative to the longitudinal axis 42.
Alternatively, the fusion plate 10 can have a valgus angle 44 relative to the longitudinal axis 42 that is different than the dimensions specifically mentioned above.
For example, the fusion plate 10 can have a valgus angle 44 of zero degrees (i.e. no valgus angle), greater than fifteen degrees, or some other value between zero and fifteen degrees, relative to the longitudinal axis 42.
, , Moreover, as illustrated, in certain embodiments, the compression aperture 22 can extend substantially along and/or parallel to the longitudinal axis 42.
Moreover, as shown in Figure 2, the compression aperture 22 extends completely through the fusion plate 10 at a compression angle 224 relative to the planar axis 246.
For example, in certain embodiments, the compression aperture 22 can extend completely through the fusion plate 10 at a compression angle 224 of between approximately 30.0 and 55.0 degrees relative to the planar axis 246. More specifically, in certain non-exclusive alternative embodiments, the compression aperture 22 can extend completely through the fusion plate 10 at a compression angle 224 of approximately 30.0, 32.5, 35.0, 37.5, 40.0, 42.5, 45.0, 47.5, 50.0, 52.5 or 55.0 degrees relative to the planar axis 246. Alternatively, the compression aperture 22 can extend completely through the fusion plate 10 at a compression angle 224 that is different than the dimensions specifically mentioned above. For example, the compression aperture 22 can extend completely through the fusion plate 10 at a compression angle 224 of greater than 55.0 degrees, less than 30.0 degrees, or some other value between 30.0 and 55.0 degrees relative to the planar axis 246.
Further, as shown in the embodiment illustrated in Figure 2, the fusion plate can include a thickened region 250 within the middle region 16 of the fusion plate 10, and the compression aperture 22 can extend through the thickened region 250 of the fusion plate 10. As illustrated, the thickened region 250 can be formed into the fusion plate 10 such that the thickened region 250 extends in a generally upward direction away from the top surface 26, i.e. extends farther away from the bone parts 929A, 929B when the fusion plate 10 is implanted. Stated in another manner, the additional thickness provided by the thickened region 250 is at least primarily, if not entirely, added onto the top surface 26 and extends upwardly away from the top surface 26 of the remainder of the fusion plate 10. Additionally and/or alternatively, at least a portion of the additional thickness provided by the thickened region 250 can extend away from the bottom surface 28 of the fusion plate 10.
The thickness of the thickened region 250 relative to the remainder of the fusion plate 10 can be varied depending on the size of the head, e.g., the head 836 (illustrated in Figure 8A) or head 436 (illustrated in Figure 4), of the compression attacher 32. In certain embodiments, the thickened region 250 can be between approximately 0.5 millimeters (approximately 0.02 inches) and 1.5 millimeters (approximately 0.06 inches) thicker than the remainder of the fusion plate 10. For example, in certain non-exclusive alternative embodiments, the thickened region 250 is at least approximately 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4 or 1.5 millimeters thicker than the remainder of the fusion plate 10. Alternatively, the thickened region 250 can be greater than 1.5 millimeters, less than 0.5 millimeters, or some other value between 0.5 and 1.5 millimeters thicker than the remainder of the fusion plate 10.
So as not to create a soft tissue irritation, with this design, the compression attacher 32 (illustrated in Figure 4) can be positioned within and extend through the , , compression aperture 22 with no portion of the head, e.g., the head 836, or the head 436, of the compression attacher 32 extending above the top surface 26 of the fusion plate 10 or below the bottom surface 28 of the fusion plate 10. Stated in another fashion, the additional thickness of the thickened region 250 and the positioning of the compression aperture 22 through the thickened region 250 of the fusion plate 10 enables the entire head 436, 836 of the compression attacher 32 to be flush with the top surface 26 or effectively hidden within the fusion plate 10 during use. Accordingly, the fusion plate 10 can be implanted, installed or inserted into the patient, with the compression attacher 32 extending through the compression aperture 22 at the compression angle 224, without any unnecessary discomfort for the patient, and without the need to remove any bone material from the bone parts 929A, 929B (illustrated in Figure 9) which are being compressed and/or fused together by the fusion plate 10.
The design of the fixation attachers 30 can be varied, in the embodiment shown in Figure 4, each of the fixation attachers 30 has a design that is substantially similar to the , design of each of the other fixation attachers 30. For example, as illustrated, each of the fixation attachers 30 is substantially fully threaded from a head 456 to a tip 458 of the fixation attacher 30. Alternatively, one or more of the fixation attachers 30 can have a design that is different from the other fixation attachers 30, e.g., one or more of the fixation attachers 30 can include less threading as compared to the fixation attachers specifically illustrated in Figure 4.
Additionally, as illustrated, the majority of the fusion plate 10 has a plate thickness 464 and the thickened region 250 has a maximum region thickness 466 that is greater than the plate thickness 464. In certain embodiments, the majority of the fusion plate 10 can have a plate thickness 464 of between approximately 0.03 and 0.06 inches, and the thickened region 250 can have a maximum region thickness 466 of between approximately 0.08 and 0.13 inches. For example, in certain non-exclusive alternative embodiments, the majority of the fusion plate 10 has a plate thickness 464 of , approximately 0.03, 0.035, 0.04, 0.045, 0.05, 0.055 or 0.06 inches, and the thickened region 250 has a maximum region thickness 466 of approximately 0.08, 0.085, 0.09, 0.095, 0.10, 0.105, 0.11, 0.115, 0.12, 0.125 or 0.13 inches. In one specific nonexclusive example, the majority of the fusion plate 10 has a plate thickness 464 of approximately 0.047 inches, and the thickened region 250 has a maximum region thickness 466 of approximately 0.105 inches. As such, the difference between the plate thickness 464 and the maximum region thickness 466 is approximately 0.058 inches. Thus, in such embodiment, the maximum region thickness 466 is approximately one hundred twenty-three percent greater than the plate thickness 464. Alternatively, the plate thickness 464 can be greater than 0.06 inches, less than 0.03 inches, or some other value between 0.03 and 0.06 inches; and/or the maximum region thickness 466 can be greater than 0.13 inches, less than 0.08 inches, or some other value between 0.08 and 0.13 inches.
Figure 5 is a bottom view of the fusion plate 10 and the attachers 30, 32 illustrated in Figure 3. In particular, Figure 5 illustrates the attachers 30, 32 extending through and away from the bottom surface 28 of the fusion plate 10. Additionally, Figure 5 further illustrates how each of the fixation attachers 30 can extend through and away from the bottom surface 28 at an angle that is different than each of the other fixation attachers 30. In one embodiment, the angles at which each of the individual fixation attachers 30 extend through and away from the bottom surface 28 can relate to the curvature or arching of the fusion plate 10 from the first side 352 to the second side 354 as shown in Figure 3.
, , Figure 7 is an enlarged view of a portion of the fusion plate 10 as indicated by circle and arrow B-B in Figure 4. In particular, Figure 7 illustrates an enlarged view of another portion of the connection between the bottom surface 28 of the fusion plate 10 and the plate lifters 434.
Alternatively, the tapered region 854 can angle outward from the shaft 852 at a tape angle 874 of greater , than 8.0 degrees, less than 2.0 degrees, or some other value between 2.0 and 8.0 degrees.
In certain embodiments, the compression attacher 832 can have an overall length 876 of between approximately 0.7 inches and 1.6 inches depending on the specific requirements of the bone parts 929A, 929B into which the fusion plate 10 (illustrated in Figure 1) is being inserted.
For example, in certain non-exclusive alternative embodiments, the length 876 of the compression attacher 832 can be approximately 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5 or 1.6 inches. Alternatively, the length 876 of the compression attacher 832 can be greater than 1.6 inches, less than 0.7 inches, or some other value between 0.7 and 1.6 inches.
Figure 8B is a sectional view of the compression attacher 832 taken on line B-B in Figure 8A. In particular, as illustrated in Figure 8B, the head 836 can include an engagement aperture 878 that is adapted to receive the insertion tool (not illustrated) during insertion of the compression attacher 832. The shape and depth of the engagement aperture 878 can be varied to suit the specifications of the insertion tool. In one non-exclusive embodiment, the engagement aperture 878 can be substantially hexagon-shaped and can extend into the tapered region 870 of the compression attacher 832. Alternatively, the engagement aperture 878 can have a different shape.
, , Alternatively, the attacher width 884 can be greater than 0.120 inches, less than 0.095 inches, or another value between 0.095 and 0.120 inches.
illustrates an enlarged view of the head 836, including the engagement aperture 878, and a portion of the tapered region 870 of the compression attacher 832. Figure BE further more clearly illustrates certain features or aspects of the compression attacher 832. For example, Figure 8E illustrates an aperture depth 886, an aperture width 888 and a pilot angle 890 of the engagement aperture 878.
Additionally, a pair of fixation attachers 30 extend through the first fixation apertures 18 positioned near the first end 12 of the fusion plate 10 and into the first bone part 929A, and a pair of fixation attachers 30 extend through the second fixation apertures 20 positioned near the second end 14 of the fusion plate 10 and into the second bone part 929B. Further, the compression attacher 32 extends through the compression aperture 22 and into or through both the first bone part 929A and the second bone part 929B, i.e.
through a portion of the first bone part 929A and into the second bone part 929B. With this design, the fusion plate 10 and compression attacher 32 cooperate to enable the effective compression and/or to increase the compression of bone material at a bone interface between the bone parts 929A, 929B, i.e. to compress the bone parts 929A, 929B
Figure 11A is a top view of still another embodiment of a fusion plate 1110 having features of the present invention. As shown in Figure 11A, the fusion plate 1110 is substantially similar to the fusion plate 1010 illustrated and described above in relation to Figure 10A. For example, the compression aperture 1122 is again a nonthreaded aperture for receiving the compression attacher, e.g., the compression attacher 32 and/or the compression attacher 832 illustrated herein above. However, in this embodiment, the compression aperture 1022 is directed substantially along and/or parallel to the longitudinal axis 1142.
Figure 11C is a sectional view of the fusion plate 1110 taken on line B-B in Figure 11A, and another embodiment of a compression attacher 1132. In particular, Figure 11C
illustrates the compression attacher 1132, e.g., a compression screw, extending through the non-threaded compression aperture 1122. In this embodiment, the compression attacher 1132 includes a threaded region 1160 that extends from the tip 1162 to near the head 1136. Additionally, the head 1136 in this embodiment is somewhat different than in the previous embodiments. For example, as illustrated, the head 1136 is rounded.
However, it should be noted that even with the rounded head 1136, the head 1136 of the compression attacher 1132 does not extend above the top surface 1126 or below the bottom surface 1128 of the fusion plate 1110 due to the compression aperture extending through the thickened region 1150 of the fusion plate 1110.
, Figure 13A is a top view of still another embodiment of a fusion plate 1310 having features of the present invention. As shown in this embodiment, the fusion plate 1310 is substantially similar to the fusion plates 1010, 1210 illustrated and described in relation to Figures 10A and 12A, respectively. For example, the fusion plate 1310 again includes a non-threaded, compression aperture 1322 that is directed at an angle relative to the longitudinal axis 1342 of the fusion plate 1310.
Figure 13B is a sectional view of the fusion plate 1310 taken on line B-B in Figure 13A. As shown in Figure 13B, the fusion plate 1310 is substantially flat. However, the fusion plate 1310 includes a small stepped region 1396 substantially adjacent to the compression aperture 1322. In particular, in this embodiment, the second end 1314 is stepped slightly in an upward direction relative to the first end 1312.
Alternatively, in other embodiments, the second end 1314 can be stepped slightly in a downward direction relative to the first end 1312. The stepped region 1396 can be utilized to accommodate certain abnormalities in the bone structure in the area where the fusion plate 1310 is to be inserted. As shown in Figure 13B, the stepped region 1396 can include a step length 1397 and a step height 1398.
Figure 14A is a top view of still yet another embodiment of a fusion plate having features of the present invention, and a plurality of fixation attachers 1430 and a compression attacher 1432 that can be used with the fusion plate 1410. In this embodiment, the fusion plate 1410 has a different shape than the previous embodiments.
In particular, as illustrated in the embodiment shown in Figure 14A, the fusion plate 1410 is substantially rectangle-shaped with rounded ends, i.e. the first end 1412 and the second end 1414 are both rounded, or semicircular, in shape.
, Additionally, the fusion plate 1410 can include one or more first fixation apertures 1418 positioned near the first end 1412, and one or more second fixation apertures 1420 positioned near the second end. Further, the first fixation apertures 1418 and the second fixation apertures 1420 are substantially aligned along the longitudinal axis 1442. In this embodiment, the fusion plate 1410 includes two first fixation apertures 1418 and two second fixation apertures 1420. Alternatively, the fusion plate 1410 can include more than two or less than two first fixation apertures 1418, and/or more than two or less than two second fixation apertures 1420.
an opposed bottom surface; and one or more plate lifters that are positioned along and extend away from the bottom surface of the fusion plate, the one or more plate lifters adapted to engage at least one of the bone parts when the fusion plate is implanted substantially adjacent to the bone parts, the one or more plate lifters having a buttress design.
2. The fusion plate of claim 1 further comprising a compression aperture that extends through the top surface and the bottom surface at a compression angle relative to the planar axis.
3. The fusion plate of claim 2 wherein the compression angle is between approximately thirty and fifty-five degrees relative to the planar axis.
4. The fusion plate of claim 2 further comprising a first end having a first thickness; and a thickened region that is spaced apart from the first end, the thickened region having a second thickness that is greater than the first thickness; and wherein the compression aperture extends through the thickened region.
5. The fusion plate of claim 4 wherein the top surface extends at least from the first end to the thickened region, and wherein the top surface at the thickened region extends farther away from the bone parts than the top surface at the first end when the fusion plate is implanted substantially adjacent to the bone parts.
6. The fusion plate of claim 4 wherein the second thickness is at least approximately 1.0 millimeters greater than the first thickness.
7. The fusion plate of claim 4 further comprising (i) a second end that is spaced apart from the first end, the thickened region being positioned within a middle region substantially between the first end and the second end, (ii) a first fixation aperture that extends through the fusion plate near the first end, and (iii) a second fixation aperture that extends through the fusion plate near the second end.
A combination comprising the fusion plate of any one of claims 2 to 7, and a compression screw that extends through the compression aperture, the compression screw being adapted to extend into the first bone part and the second bone part when the fusion plate is implanted substantially adjacent to the bone parts.
CA3024804A 2012-11-27 2013-10-15 Orthopedic fusion plate and compression screw Pending CA3024804A1 (en)
CA3024804A1 true CA3024804A1 (en) 2014-06-05
CA2976063A1 (en) * 2015-02-05 2016-08-11 Paragon 28, Inc. Bone plates, systems, and methods of use
US20100145338A1 (en) 2010-06-10 Bone Plate
CN103356277B (en) 2016-08-10 Bone plate
JP2012525213A (en) 2012-10-22 Bone plate with through-fixing screw holes
2019-02-17 EEER Examination request