Source: https://patents.google.com/patent/US8827703B2/en
Timestamp: 2018-07-23 03:08:32
Document Index: 140814489

Matched Legal Cases: ['Application No. 0104347', 'art 8', 'art 9', 'art 7', 'art 9', 'art 7']

US8827703B2 - Implant, and method and system for producing such an implant - Google Patents
US8827703B2
US8827703B2 US10499263 US49926302A US8827703B2 US 8827703 B2 US8827703 B2 US 8827703B2 US 10499263 US10499263 US 10499263 US 49926302 A US49926302 A US 49926302A US 8827703 B2 US8827703 B2 US 8827703B2
US20050260540A1 (en )
An implant and a method of producing the implant are provided. The implant can have at least one outer surface extending in its longitudinal direction. The implant can comprise an underlying wave pattern, an intermediate wave pattern, and a microscopic roughening layer. The underlying wave pattern can have waves that extend substantially in the longitudinal direction. Further, the intermediate wave pattern can be formed on the waves of the underlying wave pattern. Additionally, the microscopic roughening layer can be formed on top of the underlying wave pattern.
This application is a U.S. National Phase of International Application No. PCT/SE02/02362, filed Dec. 18, 2002, which claims the benefit of Swedish Application No. 0104347-0, filed Dec. 21, 2001.
In FIG. 1, an outer part of a thread of an implant is shown by 1. The surface 1 comprises a base structure which is produced in a known manner by cutting work, for example by turning, milling or shot-peening. The base structure is designed with an underlying wave pattern with troughs 2 and long waves 2′. The wave length A is chosen in the range of 75 to 250 μm. The outer surface 1 is rippled or undulated with a second wave pattern 3 which has been shown separately and enlarged in FIG. 1a in relation to FIG. 1. The wave length B for the waves or peaks in the second pattern is chosen in the range of 50 to 100 μm, and the waves are joined via troughs or depressions 4. This intermediate layer is obtained by laser application. In the illustrative embodiment according to FIGS. 1, 1 a and 1 b, the rippled outer surface 3 is in turn provided with an outer layer which consists of an oxide layer 5 shown separately in FIG. 5 and greatly enlarged in relation to FIG. 1 b. The trough depth C in the wave pattern 1 can be chosen in the range of 25 to 200 μm, preferably 75 to 150 μm. The wave pattern according to FIG. 1 can be substantially regular or slightly irregular and can be regarded as extending along the main longitudinal direction of the implant, i.e. in a direction parallel to the main direction and indicated by an arrow 6. The course continues along the outer surfaces of the threads, i.e. in a slight zigzag formation along its length. The wave shape can also extend along threaded or unthreaded cone-shaped surfaces. FIG. 1 c shows, in longitudinal section, threads of the implant with troughs 2″ and peaks 2′″.
The invention can be applied to implants 7 in dental situations, for example in connection with the jaw bone, which in FIG. 2 has been shown with the trabecular part 8 and the cortical part 9. The implant has one or more outer threads 7 a and a part 7 b emerging from the upper surface 9 a of the cortical part 9 of the jaw bone. A prosthetic structure which can be anchored on the implant is shown symbolically by 10. Different wave pattern combinations can be used on the thread surface(s) and on the outer surface 7 b of the emerging part 7 b, the last-mentioned surface preferably being designed with wave patterns giving a slight surface irregularity in order to counteract bacterial accumulation during the process of tissue incorporation. The longitudinal axis of the implant is shown by 7 c.
1. An implant with at least one outer surface extending in its longitudinal direction, comprising:
an underlying wave pattern with waves that extend substantially in said longitudinal direction;
an intermediate wave pattern formed on the waves of the underlying wave pattern, the intermediate wave pattern having a depth of between approximately 25 to 200 μm; and
a microscopic roughening layer formed on top of said underlying wave pattern.
2. The implant as in claim 1, wherein the wave patterns and layer combination are arranged to produce a specific value, wherein the specific value is one of surface area, surface volume, Ra, and PV.
3. The implant as in claim 1, wherein the intermediate wave pattern is established by cutting work and the microscopic roughing layer is produced by an oxidation process or a shot-peening or etching method.
4. The implant as in claim 2, wherein the intermediate wave pattern comprises substantially parallel troughs or depressions with a depth in the range of between approximately 25 to 200 μm.
5. The implant as in claim 1, wherein the intermediate wave pattern is obtained by laser bombardment.
6. The implant as in claim 5, wherein the waves of the underlying wave pattern and intermediate-length waves of the intermediate wave pattern are regularly spaced along said longitudinal direction.
7. The implant as in claim 1, wherein the wave patterns and layer combination vary along the implant's longitudinal direction.
8. The implant as in claim 1, comprising a portion for attachment to a prosthetic structure at the bone edge, the portion provided with a wave pattern and layer combination which gives a relatively small increase in surface area and surface volume in relation to the remaining portions of the implant with said combinations.
9. The implant as in claim 1, wherein the waves of the underlying wave pattern decrease along said longitudinal direction.
10. The implant of claim 1, wherein the intermediate wave pattern is formed between a trough of a wave of the underlying wave pattern and an apex or outer part of the wave of the underlying wave pattern.
11. The implant of claim 1, wherein the intermediate wave pattern comprises at least one trough.
12. The implant of claim 1, wherein the intermediate wave pattern comprises troughs with a depth of between approximately 50 to 150 μm.
13. The implant of claim 1, wherein the intermediate wave pattern comprises substantially parallel troughs with a depth of approximately up to 75 μm.
14. The implant of claim 1, wherein the waves of the underlying wave pattern and intermediate waves of the intermediate wave pattern are regularly spaced along said longitudinal direction.
15. The implant of claim 1, wherein the intermediate wave pattern substantially follows a spiral course of the waves of the long wave pattern.
16. The implant of claim 15, wherein the intermediate wave pattern is formed along one of a trough, a peak, and a section between the trough and peak of the waves of the long wave pattern.
17. The implant of claim 1, wherein the microscopic roughening layer is formed on top of said underlying wave pattern and said intermediate wave pattern.
18. An implant with at least one outer surface extending in its longitudinal direction, comprising:
an underlying wave pattern with waves that extend substantially in said longitudinal direction; and
an intermediate wave pattern formed on the waves of the underlying wave pattern, the intermediate wave pattern having a depth of between approximately 25 to 200 μm.
19. The implant of claim 18, further comprising a microscopic roughening layer formed on top of said underlying wave pattern.
20. The implant of claim 18, wherein the intermediate wave pattern is formed between a trough of a wave of the underlying wave pattern and an apex or outer part of the wave of the underlying wave pattern.
21. The implant of claim 18, wherein the intermediate wave pattern substantially follows a spiral course of the waves of the long wave pattern.
22. The implant of claim 21, wherein the intermediate wave pattern is formed in one of a trough, a peak, and a section between the trough and peak of the waves of the long wave pattern.
23. The implant of claim 18, wherein the intermediate wave pattern comprises at least one trough.
24. The implant of claim 18, wherein the intermediate wave pattern comprises troughs with a depth of between approximately 50 to 150 μm.
25. The implant of claim 18, wherein the intermediate wave pattern comprises substantially parallel troughs with a depth of approximately up to 75 μm.
26. The implant of claim 18, wherein the waves of the underlying wave pattern and intermediate waves of the intermediate wave pattern are regularly spaced along said longitudinal direction.
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