Dental implant

Patent metadata

Field	Value
Publication number	US-11058522-B2
Application number	US-201515123573-A
Country	US
Kind code	B2
Filing date	Mar 5, 2015
Priority date	Mar 7, 2014
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

The present invention discloses a dental implant ( 30; 130; 230; 330; 430 ) for preserving soft tissue and promoting bone growth, including an elongated implant body having a coronal end portion ( 31; 131; 431 ) and an apical end portion ( 32; 132; 332; 432 ); an external thread ( 40; 140; 240; 440 ); a flute arrangement ( 50; 150; 350; 450 ) having at least one helical flute having a depth; in which the apical end portion forms a blunt tip ( 39; 139; 339 ), and in which the helical flute spirals in opposite direction to the external thread, and the flute exits on the face of the blunt tip.

First claim

The invention claimed is:

1. A dental implant for preserving soft tissue and promoting bone growth, comprising:
an elongated implant body having a coronal end portion and an apical end portion;
an external thread; and a flute arrangement having a depth,
in which the apical end portion forms a blunt tip, and
in which the flute arrangement comprises at least one helical flute spiraling in an opposite direction to the external thread, the at least one helical flute has a greater depth than the depth of the thread, the at least one helical flute exits on a face of the blunt tip, the at least one helical flute circumvents the dental implant at least twice,
wherein the at least one helical flute has a coronal flank, wherein the coronal flank provides a cutting edge, wherein an angle as measured in the longitudinal cross section of the implant between the coronal flank and a normal to the longitudinal axis of said implant is between 1° and 5°;
wherein the at least one helical flute has an apical flank and a flute base between the coronal flank and the apical flank of the flute arrangement, the flute base, as measured in the longitudinal cross section of the implant being inclined along a straight line in a longitudinal cross section of the helical flute and the flute base being inclined toward the longitudinal axis in the direction of the coronal end.

2. The dental implant according to claim 1 , wherein the depth of the at least one helical flute is greater than the depth of the thread by 40% to 200%.

3. The dental implant according to claim 1 , wherein the pitch of the at least one helical flute is equal or larger than the pitch of the external thread.

4. The dental implant according to claim 1 , wherein the at least one helical flute comprises at least two helical flutes.

5. The dental implant according to claim 1 , wherein the thread extends beyond the flute arrangement in the coronal direction.

6. The dental implant according to claim 1 , wherein the implant includes a coronal section and an apical section, the coronal section and the apical section separated by a knee, wherein at least the apical section is tapered toward the apical end portion.

7. The dental implant according to claim 6 , wherein a cone angle of the coronal section is less than a cone angle of the apical section.

8. The dental implant according to claim 6 , wherein the external thread starts at the apical end portion, and wherein the external thread has its greatest height from the implant body at the knee.

9. The dental implant according to claim 1 , wherein a height of a flank of the thread increases toward the coronal end.

10. The dental implant according to claim 1 , wherein the blunt tip includes a curved protrusion formed at the apical end portion, the protrusion being symmetrical.

11. The dental implant according to claim 1 , wherein the implant comprises a prosthetic interface at the coronal end portion.

12. The dental implant according to claim 1 , wherein at least one of the external thread and the at least one helical flute comprises at least one groove.

13. Implant system, comprising:
a dental implant according to claim 1 , and at least one prosthesis.

14. The implant system according to claim 13 , wherein the prosthesis comprises at least one of an abutment, an abutment screw, a bridge, a bar and a prosthetic tooth.

15. Method for implanting a dental implant according to claim 1 , comprising the steps:
performing an incision into the gingival tissue, where the implant is to be placed;
drilling an implantation hole into the alveolar arch;
placing the implant in the hole and screwing the implant into the alveolar arch until the blunt tip of the implant touches the sinus membrane covering the sinus floor on the side opposite to where an entry of the implantation hole is located;
providing a void space between the sinus floor and the sinus membrane;
supporting the sinus membrane with the blunt tip of the implant;
at least partly filling the void space with bone debris; and
sealing the incision.

16. The method according to claim 15 , wherein the hole is a blind hole having a diameter at an entry of the blind hole that allows the blunt tip of the implant to enter until an apical flank of the external thread touches the alveolar arch and screwing of the implant may begin.

17. The method according to claim 15 , wherein the flute arrangement provides bone debris to the void space when the implant is screwed into said alveolar arch.

18. The method according to claim 15 , further comprising the step of placing a prosthesis on said implant.

19. A dental implant for preserving soft tissue and promoting bone growth, comprising:
an elongated implant body having a coronal end portion and an apical end portion;
an external thread; and a flute arrangement having a depth,
in which the apical end portion forms a blunt tip, and
in which the flute arrangement comprises at least one helical flute spiraling in an opposite direction to the external thread, the at least one helical flute has a greater depth than the depth of the thread, the at least one helical flute exits on a face of the blunt tip, the at least one helical flute circumvents the dental implant at least once,
wherein a pitch of the flute is different from a pitch of the thread, wherein the at least one helical flute comprises a flute base and a coronal flank with a straight portion positioned coronally of the flute base, the flute base, as measured in the longitudinal cross section of the implant, being inclined toward the longitudinal axis in the direction of the coronal end, the flute base being inclined along a straight line in a longitudinal cross section of the helical flute.

20. The dental implant according to claim 19 , wherein the depth of the at least one helical flute is greater than the depth of the thread by 40% to 200%.

21. The dental implant according to claim 19 , wherein the pitch of the at least one helical flute is larger than the pitch of the external thread.

22. The dental implant according to claim 19 , wherein the coronal flank provides a cutting edge, wherein an angle as measured in the longitudinal cross section of the implant between the coronal flank and a normal to the longitudinal axis of said implant is between 0° and 5°.

23. The dental implant according to claim 19 , wherein the implant includes a coronal section and an apical section, the coronal section and the apical section separated by a knee, wherein at least the apical section is tapered toward the apical end portion.

24. The dental implant according to claim 19 , wherein the implant comprises a prosthetic interface at the coronal end portion.

25. The dental implant according to claim 19 , wherein at least one of the external thread and the at least one helical flute comprises at least one groove.

26. Implant system, comprising:
a dental implant according to claim 19 , and at least one prosthesis.

27. The implant system according to claim 26 , wherein the prosthesis comprises at least one of an abutment, an abutment screw, a bridge, a bar and a prosthetic tooth.

28. The dental implant according to claim 19 , wherein a height of a flank of the thread increases toward the coronal end.

29. The dental implant according to claim 19 , wherein the blunt tip includes a curved protrusion formed at the apical end porti

Assignees

• Nobel Biocare Services Ag

Inventors

• Hall Jan
• Lundgren Stefan
• Bergman Göran
• Kullberg Fredrik

Classifications

• A61C8/0092

  for sinus lifting · CPC title

• A61C8/0024

  with self-boring cutting edge · CPC title

• A61C8/0018 Primary

  characterised by the shape · CPC title

• A61C8/0022 Primary

  Self-screwing (A61C8/0028 takes precedence) · CPC title

• A61C8/0037

  Details of the shape · CPC title