Source: http://www.google.com/patents/US8057229?dq=6721967
Timestamp: 2015-01-30 09:25:50
Document Index: 420182970

Matched Legal Cases: ['art.\n7', 'art.\n17', 'art,\n21', 'art,\n24', 'art,\n28', 'art.\n32', 'art.\n35', 'art.\n42', 'art,\n48', 'art 3', 'art 3']

Patent US8057229 - Dental implant, abutment structure and method for implanting a dental implant - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAt least one embodiment of the present invention relates to a dental implant for supporting a coronal component. In at least one embodiment, the implant includes a fixture part forming an apical bone contact part of the implant, an abutment part forming a coronal component support part of the implant,...http://www.google.com/patents/US8057229?utm_source=gb-gplus-sharePatent US8057229 - Dental implant, abutment structure and method for implanting a dental implantAdvanced Patent SearchPublication numberUS8057229 B2Publication typeGrantApplication numberUS 12/073,217Publication dateNov 15, 2011Filing dateMar 3, 2008Priority dateMar 6, 2007Also published asCA2679140A1, CN101621970A, EP1967158A1, EP2368519A1, US20090291412, WO2008107417A1Publication number073217, 12073217, US 8057229 B2, US 8057229B2, US-B2-8057229, US8057229 B2, US8057229B2InventorsKent Engstr�m, Anders HalldinOriginal AssigneeAstra Tech AbExport CitationBiBTeX, EndNote, RefManPatent Citations (21), Non-Patent Citations (2), Classifications (6), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetDental implant, abutment structure and method for implanting a dental implantUS 8057229 B2Abstract At least one embodiment of the present invention relates to a dental implant for supporting a coronal component. In at least one embodiment, the implant includes a fixture part forming an apical bone contact part of the implant, an abutment part forming a coronal component support part of the implant, and an abutment screw, wherein said abutment part is arranged to, in an assembled state of said dental implant, be fixed to the fixture part by the abutment screw, and wherein a coronal end portion of the abutment screw is arranged to, in the assembled state, be positioned coronally of a coronal end portion of the abutment part. At least one embodiment of the present invention also relates to abutment structures and methods for implanting a dental implant.
1. A dental implant for supporting a cement-retained coronal component, said implant comprising:
an abutment screw, wherein said abutment part is arranged to, in an assembled state of said dental implant, be fixed to said fixture part by said abutment screw, and wherein a coronal end portion of said abutment screw is arranged to, in said assembled state, extend beyond a coronal end of a coronal end portion of said abutment part,
wherein at least a portion of said abutment part has a conical shape tapered at least in a coronal direction of said dental implant,
wherein at least a portion of the coronal end portion of said abutment screw is conical in shape and tapered in the coronal direction of the dental implant,
wherein a coronal portion of the abutment part is provided with one or more rotational stops configured to prevent an attached coronal component from rotation.
2. A dental implant according to claim 1, wherein said abutment screw comprises at least one drive device arranged at a coronal end surface of said abutment screw, and wherein said coronal end surface is substantially perpendicular to an axial direction of said abutment screw.
3. A dental implant according to claim 1, wherein said abutment screw comprises a substantially cylindrical coronal portion.
4. A dental implant according to claim 1, wherein said coronal end portion of said abutment screw forms a coronal end portion of said dental implant.
5. A dental implant according to claim 1, wherein said coronal end portion of said abutment screw extending coronally of said abutment part is arranged for supporting said coronal component.
6. A dental implant according to claim 1, wherein said abutment part is provided with an internal bore extending in the axial direction of said abutment part, wherein said bore is provided with a tapering portion, which portion tapers in the apical direction of said abutment part.
7. A dental implant according to claim 1, wherein said abutment screw is arranged to, in said assembled state of said dental implant, extend in a bore arranged in said abutment part and said fixture part, respectively.
8. A dental implant according to any claim 1, wherein said abutment part or said abutment screw is provided with a snap fitting arranged for engagement with said coronal component.
9. A dental implant according to claim 1, wherein at least a part of said abutment part, which is intended for supporting said coronal component, is provided with means for increasing the retention capability of said abutment part (3).
10. A dental implant according to claim 1, wherein the one or more rotational stops are notches in said abutment part, the notches being configured to expose additional portions of an outer surface of the abutment screw to allow cement to adhere to the exposed additional portions of the abutment screw and an outer surface of the abutment part to prevent the coronal component from rotating.
11. A dental implant according to claim 1, wherein at least a portion of an outer circumference of said abutment part, which is intended for supporting said coronal component, has a non-circular outline.
12. A dental implant according to claim 1, wherein said coronal end portion of said abutment screw, that in said assembled state of said dental implant is extending coronally of a coronal end portion of said abutment part, has a length of 1-7 mm in the axial direction.
13. A dental implant according to claim 1, wherein the portion of said abutment part that during use may be in contact with a coronal component attached to said dental implant has a length of 1-5 mm in the axial direction.
14. A dental implant according to claim 1, wherein the portion of said abutment part that during use may be in contact with a coronal component attached to said dental implant has a length of 2-2.5 mm in the axial direction.
15. A dental implant according to claim 1, wherein the total length of the portion of the abutment part and the portion of the abutment screw that during use may be in contact with and support a coronal component is 3-8 mm in the axial direction.
16. A dental implant according to claim 1, wherein said coronal end portion of said abutment screw is arranged to, in said assembled state of said dental implant, be extending at least 1 mm coronally of said coronal end portion of said abutment part.
17. A dental implant according to claim 1, wherein the diameter of said bore extending in the axial direction of said abutment part is 1.5 to 5 mm.
18. A dental implant according to claim 1, wherein the diameter of said bore extending in the axial direction of said abutment part is 2 to 4 mm.
an abutment screw including a generally cylindrical coronal portion, wherein said abutment part is arranged to, in an assembled state of said dental implant, be fixed to said fixture part by said abutment screw, and wherein a coronal end portion of said abutment screw is arranged to, in said assembled state, extend beyond a coronal end of a coronal end portion of said abutment part,
21. A dental implant according to claim 20, wherein said dental implant is adapted to support a cement-retained coronal component.
22. A dental implant according to claim 20, wherein said abutment screw comprises at least one drive device arranged at a coronal end surface of said abutment screw, and wherein said coronal end surface is substantially perpendicular to an axial direction of said abutment screw.
23. A dental implant comprising:
an abutment screw, wherein said abutment part is arranged to, in an assembled state of said dental implant, be fixed to said fixture part by said abutment screw, wherein said abutment screw includes at least one drive device arranged at a coronal end surface of said abutment screw, wherein said coronal end surface is substantially perpendicular to an axial direction of said abutment screw, and wherein a coronal end portion of said abutment screw is arranged to, in said assembled state, extend beyond a coronal end of a coronal end portion of said abutment part,
24. A dental implant according to claim 23, wherein said at least one drive device of said abutment screw comprises at least one notch.
25. A dental implant according to claim 23, wherein said dental implant is adapted to support a cement-retained coronal component.
26. A dental implant according to claim 23, wherein said abutment screw comprises a substantially cylindrical coronal portion.
27. An abutment structure for use in a dental implant adapted to support a cement-retained coronal component, wherein said abutment structure is adapted to be supported by a fixture part of said implant, said abutment structure comprising:
an abutment screw, wherein said abutment part is adapted to be fixed to said fixture part by said abutment screw, and wherein said abutment part has an axial extension such that when said abutment part is fixed to said fixture part by said abutment screw, a coronal end portion of said abutment screw will extend beyond a coronal end of a coronal end portion of said abutment part,
28. An abutment structure according to claim 27, wherein said abutment screw includes at least one drive device arranged at a coronal end surface of said abutment screw, and wherein said coronal end surface is substantially perpendicular to the axial direction of said abutment screw.
29. An abutment structure according to claim 27, wherein said abutment screw includes a substantially cylindrical coronal portion.
30. An abutment structure according to claim 27, wherein said coronal end portion of said abutment screw, which in an assembled state extends coronally of said abutment part, is arranged for supporting a coronal component.
31. An abutment structure according to claim 27, wherein said abutment part is provided with an internal bore extending in the axial direction of said abutment part, wherein said bore is provided with a tapering portion, which portion tapers in the apical direction of said abutment part.
32. An abutment structure according to claim 27, wherein said abutment part includes a bore, extending substantially in the axial direction of said abutment part, wherein said bore is adapted for receiving said abutment screw.
33. An abutment structure according to claim 27, wherein at least one of said abutment part and said abutment screw is provided with a snap fitting arranged for engagement with a coronal component.
34. An abutment structure according to claim 27 wherein at least a part of said abutment part, which is intended for supporting a coronal component, is provided with means for increasing the retention capability of said abutment part.
35. An abutment structure according to claim 27, wherein the one or more rotational stops are notches in said abutment part, the notches being configured to expose additional portions of an outer surface of the abutment screw to allow cement to adhere to the exposed additional portions of the abutment screw and an outer surface of the abutment part to prevent the coronal component from rotating.
36. An abutment structure according to claim 27, wherein at least a portion of an outer circumference of said abutment part, intended to support a coronal component, includes a non-circular outline.
37. An abutment structure according to claim 27, wherein said coronal end portion of said abutment screw, that in an assembled state of a dental implant is extending coronally of a coronal end portion of said abutment part, has a length of 1-7 mm in the axial direction.
38. An abutment structure according to claim 27, wherein the portion of said abutment part that during use may be in contact with a coronal component attached to said dental implant has a length of 1-5 mm in the axial direction.
39. An abutment structure according to claim 27, wherein the portion of said abutment part that during use may be in contact with a coronal component attached to said dental implant has a length of 2-2.5 mm in the axial direction.
40. An abutment structure according to claim 27, wherein the total length of the portion of the abutment part and the portion of the abutment screw that during use may be in contact with and support a coronal component is 3-8 mm in the axial direction.
41. An abutment structure according to claim 27, wherein said coronal end portion of said abutment screw is arranged to, in an assembled state, be extending at least 1 mm coronally of said coronal end portion of said abutment part.
42. An abutment structure according to claim 27, wherein the diameter of said bore extending in the axial direction of said abutment part is 1.5 to 5 mm.
43. An abutment structure according to claim 27, wherein the diameter of said bore extending in the axial direction of said abutment part is 2 to 4 mm.
using an abutment structure according to claim 27, for supporting a coronal component in a patient's oral cavity.
45. An abutment structure for use in a dental implant, wherein said abutment structure is adapted to be supported by a fixture part of said implant, said abutment structure comprising:
an abutment screw, wherein said abutment part is adapted to be fixed to said fixture part by said abutment screw, wherein said abutment screw includes a generally cylindrical coronal portion, and wherein said abutment part has an axial extension such that when said abutment part is fixed to said fixture part by said abutment screw, a coronal end portion of said abutment screw extending beyond a coronal end of a coronal end portion of said abutment part,
wherein at least a portion of the coronal end portion of said abutment screw is conical in shape and tapered in the coronal direction of the dental implant.
46. An abutment structure according to claim 45, wherein said abutment structure is intended to support a cement-retained coronal component.
47. An abutment structure for use in a dental implant, wherein said abutment structure is adapted to be supported by a fixture part of said implant, said abutment structure comprising:
an abutment screw, wherein said abutment part is adapted to be fixed to said fixture part by said abutment screw, wherein said abutment screw includes at least one drive device arranged at a coronal end surface of said abutment screw, wherein said coronal end surface of said abutment screw is substantially perpendicular to an axial direction of said abutment screw, and wherein said abutment part has an axial extension such that when said abutment part is fixed to said fixture part by said abutment screw, a coronal end portion of said abutment screw extending beyond a coronal end of a coronal end portion of said abutment part,
48. An abutment structure according to claim 47, wherein said at least one drive device of said abutment screw, by which said abutment part is adapted to be fixed to said fixture part, includes at least one notch.
49. A method for implantation of a dental implant, said method comprising:
arranging an abutment part in relation to said fixture part in such a manner that said abutment part is supported by said fixture part and extends coronally of said fixture part, wherein at least a portion of said abutment part has a conical shape tapered at least in a coronal direction of said dental implant;
fixating said abutment part to said fixture part by an abutment screw, in such a manner that a coronal end portion of said abutment screw extends beyond a coronal end of a coronal end portion of said abutment part, wherein at least a portion of the coronal end portion of said abutment screw is conical in shape and tapered in the coronal direction of the dental implant;
arranging a coronal component in a patient's oral cavity, wherein said coronal component is supported by said abutment part and said coronally extending portion of said abutment screw;
providing a coronal portion of the abutment part with one or more rotational stops, the notches exposing additional portions of an outer surface of the abutment screw;
retaining said coronal component to said dental implant by cement; and
preventing rotation of said coronal component by allowing the cement to adhere to the exposed additional portions of the abutment screw and an outer surface of the abutment part.
fixating said abutment part to said fixture part by an abutment screw including a generally cylindrical coronal portion, in such a manner that a coronal end portion of said abutment screw extends beyond a coronal end of a coronal end portion of said abutment part, wherein at least a portion of the coronal end portion of said abutment screw is conical in shape and tapered in the coronal direction of the dental implant; and
providing a coronal portion of the abutment part with one or more rotational stops.
the providing of the one or more rotational stops including cutting notches in the coronal portion of the abutment part to expose additional portions of an outer surface of the abutment screw;
fixating said coronal component to said dental implant by cement; and
preventing rotation of said coronal component by allowing the cement to adhere to the exposed additional portions of the outer surface of the abutment screw and an outer surface of the abutment part.
fixating said abutment part to said fixture part by tightening an abutment screw, in such a manner that a coronal end portion of said abutment screw extends beyond a coronal end of a coronal end portion of said abutment part, wherein at least a portion of the coronal end portion of said abutment screw is conical in shape and tapered in the coronal direction of the dental implant, wherein said abutment screw includes at least one drive device arranged at a coronal end surface of said abutment screw, and wherein said coronal end surface is substantially perpendicular to an axial direction of said abutment screw; and
53. A dental implant for supporting a cement-retained coronal component, said implant comprising:
a solid substantially cylindrical abutment screw, wherein said abutment part is arranged to, in an assembled state of said dental implant, be fixed to said fixture part by said abutment screw, and wherein a coronal end portion of said abutment screw is arranged to, in said assembled state, extend beyond a coronal end of a coronal end portion of said abutment part,
wherein a coronal portion of the abutment part is provided with one or more rotational stops configured to prevent an attached coronal component from rotation. Description
TECHNICAL FIELD OF THE INVENTION The present invention relates to a dental implant for supporting a coronal component, said implant comprising a fixture part forming an apical bone contact part of said implant, an abutment part forming a coronal component support part of said implant, and an abutment screw, wherein said abutment part is arranged to, in an assembled state of said dental implant, be fixed to said fixture part by said abutment screw.
BACKGROUND ART Dental implant systems are widely used for replacing damaged or lost natural teeth. In such systems, a fixture part is usually implanted into the bone tissue of the maxilla or mandible of a patient in order to replace the natural tooth root. An abutment structure comprising one or several parts may then be attached to the fixture in order to build up a core for the part of the prosthetic tooth protruding from the bone tissue, through the soft gingival tissue and into the mouth of the patient. On said abutment structure, the prosthesis or crown may finally be seated.
SUMMARY OF THE INVENTION The object of the present invention is met with a dental implant according to any one of the independent claims 1, 2 or 3. The object of the present invention is also met with an abutment structure according to any one of the independent claims 26, 27, 28. The object of the present invention is also met with a method according to any one of claims 50, 51, 52.
The term �coronal� is here and throughout this application used to indicate a direction towards a head end or trailing end of the component discussed. For example, in a situation where an abutment is connected to a fixture, the coronal direction of the abutment would be a direction towards the part of the abutment being directed away from the fixture. Likewise, the term �apical� indicates a direction towards an insertion end of the component. For an abutment connected to a fixture, the apical direction would be a direction towards the fixture. Thus, apical and coronal are opposite directions. Furthermore, the term �axial direction� is used throughout this application to indicate a direction taken from the coronal end to the apical end, or vice versa.
inserting a fixture part at least partially into bone, such that said fixture part forms an apical bone contact part of said dental implant; arranging an abutment part in relation to said fixture part in such a manner that said abutment part is supported by said fixture part and extends coronally of said fixture part; fixating said abutment part to said fixture part by an abutment screw, in such a manner that a coronal end portion of said abutment screw is positioned coronally of a coronal end portion of said abutment part; arranging a coronal component in a patient's oral cavity, wherein said coronal component is supported by said abutment part and said coronally extending portion of said abutment screw; and retaining said coronal component to said dental implant by cement. According to another aspect the present invention provides a method for implantation of a dental implant, said method comprising the steps of:
inserting a fixture part at least partially into bone, such that said fixture part forms an apical bone contact part of said dental implant; arranging an abutment part in relation to said fixture part in such a manner that said abutment part is supported by said fixture part and extends coronally of said fixture part; and fixating said abutment part to said fixture part by an abutment screw comprising a generally cylindrical coronal portion, in such a manner that a coronal end portion of said abutment screw is positioned coronally of a coronal end portion of said abutment part. According to another aspect the present invention provides a method for implantation of a dental implant, said method comprising the steps of:
inserting a fixture part at least partially into bone, such that said fixture part forms an apical bone contact part of said dental implant; arranging an abutment part in relation to said fixture part in such a manner that said abutment part is supported by said fixture part and extends coronally of said fixture part; and fixating said abutment part to said fixture part by tightening an abutment screw, in such a manner that a coronal end portion of said abutment screw is positioned coronally of a coronal end portion of said abutment part, wherein said abutment screw has drive means arranged at a coronal end surface of said abutment screw, and wherein said coronal end surface is substantially perpendicular to an axial direction of said abutment screw. Preferably, said method further comprises the steps of:
arranging a coronal component in a patient's oral cavity, wherein said coronal component is supported by said abutment part and said coronally extending portion of said abutment screw; and fixating said coronal component to said dental implant by cement. A general idea of the invention is thus to implant a dental implant in such a manner that a portion of the abutment screw extends coronally of the coronal end portion of the abutment part. A coronal component such as a dental crown, a part of a dental bridge, a burn-out cylinder, a healing cap, a waxing sleeve or an impression pick-up may therefore, when mounted to the abutment structure, become at least partially supported by the coronal portion of the abutment screw. It may be preferred that the coronal component also is in contact with and at least partly supported by the abutment part as well. For example, the abutment screw may support the coronal component in such a manner that it carries the force components that may act upon the coronal component in a direction perpendicular to the longitudinal axis of the dental implant. The abutment part may then support the coronal component in such a manner that it carries the rotational forces the coronal component may be subject to. It may be preferred that the length of the abutment part that is in contact with and supports the coronal component has a length in the axial direction of approximately 2 to 2.5 mm. It may also be preferred that the abutment part is provided with one or more rotational stops in order to prevent an attached coronal component from rotation.
BRIEF DESCRIPTION OF THE DRAWINGS By way of example, embodiments of the present invention will now be described with reference to the accompanying figures of drawings, in which:
FIG. 2 b is a top view of the abutment structure shown in FIG. 2 a. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION The inventive concept relates to dental implants, abutment structures and methods for implantation of a dental implant.
An embodiment of the inventive concept will now be described in relation to FIGS. 1 to 2 b. The implant 1 is a dental implant for implantation into a maxilla or mandible of a patient and it is adapted to support a coronal component such as a crown, a part of a dental bridge, a burn-out cylinder, a healing cap, a waxing sleeve or an impression pick-up.
As may be seen in FIGS. 1 to 2 b, the portion of the abutment part 3 that is intended to be positioned coronally of the gingiva 15 when implanted into a patient's mouth is slightly angulated or tapering. This angulation may for example be 6�. As may be seen in FIGS. 1 to 2, the abutment screw 4 also has a conical shape tapered in the coronal direction. The abutment screw 4 tapers at least in a portion of the portion extending outside the abutment part 3. This angulation may for example be 4 to 8�. The purpose of these angulations are to be able to position several dental implants beside each other, i.e. when replacing several teeth, without the coronal components that is to be secured to each dental implants coming in conflict with each other or with surrounding teeth, for example during mounting or dismounting of the coronal components.
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