Source: https://patents.google.com/patent/US20150305836A1/en
Timestamp: 2019-10-22 23:03:56
Document Index: 295674691

Matched Legal Cases: ['art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 112', 'art 112', 'art 12', 'art 112', 'art 112', 'art 112', 'art 112', 'art 112', 'art 112', 'art 112', 'art 112', 'art.\n5', 'art.\n13']

US20150305836A1 - Abutment and method of attaching an abutment to a dental implant - Google Patents
US20150305836A1
US20150305836A1 US14/654,407 US201314654407A US2015305836A1 US 20150305836 A1 US20150305836 A1 US 20150305836A1 US 201314654407 A US201314654407 A US 201314654407A US 2015305836 A1 US2015305836 A1 US 2015305836A1
US14/654,407
US9668833B2 (en
2012-12-21 Priority to GBGB1223202.1 priority Critical
2012-12-21 Priority to GB1223202.1A priority patent/GB2509135A/en
2013-12-17 Application filed by Nobel Biocare Services AG filed Critical Nobel Biocare Services AG
2013-12-17 Priority to PCT/EP2013/003807 priority patent/WO2014095034A1/en
2015-09-17 Assigned to NOBEL BIOCARE SERVICES AG reassignment NOBEL BIOCARE SERVICES AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ERIKSSON, THOMAS, Sollberger, David, JORNEUS, LARS, BRUNELL, Mikael, FISCHER, THOMAS, HAUS, Adrian, PETERSON, Henrik
2015-10-29 Publication of US20150305836A1 publication Critical patent/US20150305836A1/en
2017-06-06 Publication of US9668833B2 publication Critical patent/US9668833B2/en
239000000919 ceramic Substances 0 abstract claims description 95
239000004053 dental implant Substances 0 abstract claims description title 42
229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0 claims description 34
By providing a non-brittle metal adapter which has the conical connection interface towards the dental implant, the strength of the abutment may be improved. Still high esthetics are maintained due to the ceramic part. Also, since the metal adapter is removably attachable to the ceramic part, it can conveniently be removed from the ceramic part e.g. when porcelain is fused to the ceramic part so that the metal adapter is not heated. It should be noted that metal adapters/portions are known per se from WO2004002358 and U.S. Pat. No. 6,168,435 and US2012077150, but not for conical connection. Also, the metal adapter in WO2004002358 is not load-bearing—it only prevents rotation. Also, the metal portions in
U.S. Pat. No. 6,168,435 and US2012077150 appear not to be removably attachable to the ceramic part.
The metal adapter may include an outer surface devised for soft tissue apposition. Said outer surface may be arranged between said load-bearing circumferential surface and said external conical shape.
The ceramic part may be a full-contour part. According to another aspect of the present invention, the abutment is provided in combination with the dental implant.
FIG. 1 a is a perspective view of an abutment with a ceramic part and a metal adapter according to an embodiment of the present invention.
FIG. 1 b is a cross-sectional view of the abutment in FIG. 1 a.
FIG. 2 a is a perspective view of the metal adapter of FIGS. 1 a-1 b.
FIG. 2 b is a cross-sectional view of the metal adapter in FIG. 2 a.
FIG. 3 a is a perspective view of the ceramic part of FIGS. 1 a-1 b.
FIG. 3 b is a cross-sectional view of the ceramic part in FIG. 3 a.
FIG. 4 a is a perspective view of the abutment of FIGS. 1 a-1 b fixed to a dental implant.
FIG. 4 b is a cross-sectional view of the arrangement in FIG. 4 a.
FIGS. 5 a-5 b are perspective views of a metal adapter and ceramic part according to another embodiment of the present invention.
FIGS. 6 a-6 b are perspective views of a metal adapter and ceramic part according to yet another embodiment of the present invention.
FIG. 6 c is a cross-sectional view of the metal adapter of FIG. 6 a attached to the ceramic part of FIG. 6 b.
FIG. 6 d is a cross-sectional view of the metal adapter of FIG. 6 a and the ceramic part of FIG. 6 b attached to a dental implant.
FIGS. 1 a-1 b show an abutment 10 according to an embodiment of the present invention.
The abutment 10 further comprises an apical metal adapter 14. The metal adapter 14 is also shown in FIGS. 2 a-2 b. The metal adapter 14 is for example made of titanium or titanium alloy. The metal adapter 14 has a conical connection interface generally designated with reference sign 16 (FIG. 2 a). The conical connection interface 16 allows the abutment 10 to be attached to a dental implant 18 (FIGS. 4 a-4 b), which dental implant 18 has an internal conical connection interface 20 corresponding to the conical connection interface 16 of the abutment 10/metal adapter 14. The metal adapter 14 may be coloured to match a colouring of the dental implant 18.
The ceramic part 12 further comprises a central protruding portion 40 (FIGS. 3 a-3 b) provided at the apical end 42 of the ceramic part 12. The protruding portion 40 has a circumferential side wall 44, with at least one but preferably two opposite flat surfaces 46 corresponding to the flat surface(s) 34 of the metal adapter 14. The protruding portion 40 is surrounded by a circumferential surface 48, which preferably is flat in a plane perpendicular to the longitudinal axis 28. The protruding portion 38 is generally adapted to be received in the recess 30 of the metal adapter 14. The metal adapter 14 is removably attachable to the ceramic part 12. To this end, the metal adapter 14 may comprise at least one flexible arm 52 with a protrusion 50. The at least one flexible arm 52 may be arranged on a ledge 54 of the side wall 56 of the recess 30. The at least one arm 52 extends in a direction away from the apical end 24 of the metal adapter 14, and it is generally parallel to the longitudinal axis 28. The protrusion 50 is provided at the coronal free end of the flexible arm 52. The at least one protrusion 50 is inwardly directed.
The at least one arm 52 is flexible so that the free end with the protrusion 50 can move or flex radially (perpendicular to the longitudinal axis 28), as indicated by the arrow in FIG. 2 a. The flexibility of the at least one arm 52 may be achieved and controlled by selecting suitable dimensions of the arm 52 given what material the adapter 14 is made of. The at least one protrusion 50 may be arranged apically of the coronal edge 53 of the at least one flat surface 34. Thereby the correct rotational relationship between the ceramic part 12 and the metal adapter 14 may be established before the ceramic part 12 reaches the protrusion(s) 50. In the illustrated embodiment, there are two arms 52 which are oppositely arranged in the circumferential direction.
Further, the ceramic part 12 may optionally comprises at least one recess 58, which matches the at least one protrusion 50 of the metal adapter 14. In FIGS. 3 a-3 b, the ceramic part 12 has two outwardly open recesses 58 arranged on the protruding portion 40 at a distance from the apical end 42. Like the protrusions 50, the indentations 58 may have a limited height. Also like the protrusions 50, the indentations 58 may be curved or otherwise devoid of any right angles or undercuts, at least on their apical sides.
The ceramic part 12 further comprises a screw channel 60. The screw channel 60 passes through the ceramic part 12, and forms a first opening 62 a at a first end 64 a of the screw channel 60 and a second opening 62 b at a second (apical) end 64 b of the screw channel 60. In this embodiment, the screw channel 60 is straight, with the first opening 62 a at the coronal end 66 of the ceramic part 12 and the second opening 62 b at the apical end 42 of the ceramic part 12. In the screw channel 60, there is provided a screw seat 68 proximal to the second end 64 b. The screw channel 60 preferably includes an inclined surface defining said screw seat 68. The screw seat 68 is adapted to seat the head 70 of a screw 72 (FIG. 4 b) used for fixing the abutment 10 to the dental implant 18. Opposite the head 70, the screw 72 has an external thread 74.
The dental implant 18 may for example be of the type disclosed in WO 2008/128757 A2, the content of which herein is incorporated by reference. However, other dental implants may be used as well, such as NobelReplace Conical Connection provided by Nobel Biocare. Among other things, the dental implant 18 comprises the internal conical connection interface 20. The internal conical connection interface 20 is open to the coronal end 82 of the dental implant 18, and comprises a conical chamber 84, a hexagonal interlock recess 86, and an internally threaded portion 88 (FIG. 4 b).
As the abutment 10 is fixed to the dental implant 18, an outer surface 90 of the metal adapter 14 between the ceramic part 12 and the dental implant 18 remains exposed to the outside, as seen in FIGS. 4 a-4 b. The outer surface 90 is preferably devised for soft tissue apposition. That is, the outer surface 90 is supposed to face the gum of the patient. The surface 90 may have a height H of about 1.5 mm. Also, the surface 90 may be coloured to resemble the gingival (soft tissue). Also when the abutment 10 is fixed to the dental implant 18, there is no point of contact between the ceramic part 12 and the dental implant 18, cf. the metal adapter of WO2004002358. Also, since the ceramic part 12 has the apically protruding portion 40 received in the coronal recess 30 of the metal adapter 14, the screw seat 68 and screw head 70 may be situated relatively close to the implant 18, cf. the embodiments of FIGS. 5 a-5 b and 6 a-6 b.
FIGS. 5 a-5 b show a metal adapter 114 and ceramic part 112 according to another embodiment of the present invention. The metal adapter 114 and ceramic part 112 in FIGS. 5 a-5 b may be similar to the metal adapter 14 and ceramic part 12 shown in FIGS. 1-4, but differ when it comes to the interface between them. The metal adapter 114 has at its coronal end 132 a central protruding portion 100. The protruding portion 100 is adapted to be received in a central apical recess 102 of the ceramic part 112. The protruding portion 100 is surrounded by a circumferential load-bearing ledge 138. The protruding portion 100 comprises two opposite flexible arms 152, each with an outwardly directed protrusion 150. The protrusion 150 is arranged at the free apical end of the respective arm 152. The ceramic part 112 may optionally comprise at least one inwardly open recess matching the two protrusions 150 and arranged in a side wall 144 of the central apical recess 102. When the metal adapter 114 is attached to the ceramic part 112, the two protrusions 150 are pressed against the side wall 144 for securing the metal adapter 114 to the ceramic part 112. Also, the circumferential ledge 138 may abut against a corresponding circumferential rim 148 of the ceramic part 112. Two opposite flat surfaces 134 on the protruding portion 100 of the metal adapter 114 may match with corresponding flat surfaces 146 in the central apical recess 102 of the ceramic part 112 to serve as a rotation lock. Alternatively, the surfaces on the protruding portion of the metal adapter 114 may be convex 134 a-c, and the matching surfaces of the ceramic part 112 may be concave 146 a-c, as seen in the embodiment shown in FIGS. 6 a-6 d. In FIGS. 6 a-6 d, there are three convex surfaces 134 a-cuniformly distributed in the circumferential direction on the metal adapter 114, and three concave surfaces 146 a-cuniformly distributed in the circumferential direction in ceramic part 112. Likewise on the metal adapter 114, there are three flexible arms/protrusions arranged between the three convex surfaces 134 a-c.
wherein the metal adapter comprises at least one flexible arm with a protrusion adapted to press against a side wall and/or snap into any corresponding recess of the ceramic part to secure the metal adapter to the ceramic part in the coronal-apical direction, and
wherein the metal adapter comprises at least one convex surface adapted to abut against at least one corresponding concave surface of the ceramic part to prevent rotation between the ceramic part and the metal adapter.
2. The abutment according to claim 1, wherein the metal adapter at its coronal end has a central protruding portion which is adapted to be received in a central apical recess of the ceramic part, and wherein said central protruding portion accommodates said at least one flexible arm and said at least one convex surface.
3. The abutment according to claim 1, wherein said at least one convex surface is three convex surfaces uniformly distributed in the circumferential direction on the metal adapter, wherein said at least one corresponding concave surface is three concave surfaces uniformly distributed in the circumferential direction in the ceramic part, and wherein the metal adapter comprises three flexible arms and protrusions arranged between the three convex surfaces.
4. The abutment according to claim 1, wherein the metal adapter includes a load-bearing circumferential surface adapted to abut against a corresponding circumferential surface of the ceramic part.
5. The abutment according to claim 1, wherein the conical connection interface of the metal adapter includes an external conical shape tapering towards the apical end of the metal adapter and adapted to mate with a corresponding conical surface of the dental implant, and an external indexed portion provided apically of the conical shape adjacent to the apical end of the metal adapter.
6. The abutment according to claim 1, wherein the metal adapter includes an outer surface adapted to appose soft tissue.
7. The abutment according to claim 4,
8. The abutment according to claim 1, wherein the ceramic part comprises a screw channel passing through the ceramic part and forming a first opening at a first end and a second opening at an apical end, and a screw seat proximal to the apical end of the screw channel to seat the head of a screw for the fixation of the abutment to the dental implant.
9. The abutment according to claim 8, wherein the longitudinal axis of the screw channel at the first end does not match the longitudinal axis of the screw channel at the apical end.
10. The abutment according to claim 1, wherein the metal adapter comprises a bore passing through the metal adapter and forming a coronal opening and an apical opening, and wherein the bore is provided with an internal thread.
11. The abutment according to claim 1, wherein the ceramic part is adapted to support a dental restoration.
12. The abutment according to claim 1, wherein the ceramic part is a full-contour part.
13. The abutment according to claim 1, in combination with the dental implant.
14. A method of attaching the abutment of claim 6 to a dental implant anchored in a jaw bone of a patient, wherein the coronal end of the dental implant is substantially in level with the surface or crest of the jaw bone, the method comprising:
15. The abutment according to claim 1, wherein the protrusion is adapted to press against the side wall and snap into any corresponding recess of the ceramic part.
US14/654,407 2012-12-21 2013-12-17 Abutment and method of attaching an abutment to a dental implant Active 2034-02-08 US9668833B2 (en)
US9668833B2 US9668833B2 (en) 2017-06-06
US14/654,407 Active 2034-02-08 US9668833B2 (en) 2012-12-21 2013-12-17 Abutment and method of attaching an abutment to a dental implant
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DE502004012224D1 (en) 2003-04-04 2011-04-07 Xawex Ag Blank for the production of dental reconstructions and its production process
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KR20100022050A (en) 2007-05-16 2010-02-26 노벨 바이오케어 서비시스 아게 Ceramic one-piece dental implant
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GB2509135A (en) 2014-06-25
ES2526704T5 (en) 2018-09-28 Dental abutment
KR20100022050A (en) 2010-02-26 Ceramic one-piece dental implant