Textured surface having undercut micro recesses in a surface

• US 7,018,418 B2
• Filed: 07/24/2002
• Issued: 03/28/2006
• Est. Priority Date: 01/25/2001
• Status: Expired due to Term

• Current Assignee: Tecomet, Inc.
• Original Assignee: Tecomet, Inc.
• Inventors: Amrich, Mark, Rolfe, Jonathan L., Buturlia, Joseph, Lynch, Robert F.
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): MILLER, CHERYL L
• Application Number:
  US10/202,575
• Publication Number:
  US 20030065401A1
• Time in Patent Office: 1,343 Days
• Field of Search: 623/1.39, 623/1.4, 623/22.27, 623 2329- 2331, 623/23.5, 623/23.55, 623/23.74, 623/17.11, 623/17.16, 623/17, 623/23.72, 428/141
• US Class Current: 623/23.5
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61C 2008/0046 Textured surface, e.g. roughness, microstructure A61C8/0013 takes precedence
• CPC Class Codes: A61C 8/0012 characterised by the material or composition, e.g. ceramics, surface layer, metal alloy use of specific materials A61K6/00
• CPC Class Codes: A61F 2/2803 for mandibular reconstruction temporo-mandibular joints A61F2/3099; bone plates for the jaw A61B17/8071
• CPC Class Codes: A61F 2/30767 Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/32 for the hip
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/36 Femoral heads ; Femoral endoprostheses
• CPC Class Codes: A61F 2/3662 Femoral shafts
• CPC Class Codes: A61F 2/3859 Femoral components
• CPC Class Codes: A61F 2/446 having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
• CPC Class Codes: A61F 2002/30149 pentagonal
• CPC Class Codes: A61F 2002/30153 rectangular
• CPC Class Codes: A61F 2002/3021 frustoconical
• CPC Class Codes: A61F 2002/30217 hollow cones, e.g. tubular-like cones
• CPC Class Codes: A61F 2002/30253 ellipsoidal or ovoid
• CPC Class Codes: A61F 2002/30535 Special structural features of bone or joint prostheses not otherwise provided for
• CPC Class Codes: A61F 2002/30777 Oblong apertures
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30787 : inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30838 : Microstructures
• CPC Class Codes: A61F 2002/30873 : Threadings machined on non-cylindrical external surfaces
• CPC Class Codes: A61F 2002/30879 : Ribs
• CPC Class Codes: A61F 2002/30883 : dovetail-shaped
• CPC Class Codes: A61F 2002/30892 : parallel
• CPC Class Codes: A61F 2002/30925 : etched
• CPC Class Codes: A61F 2002/30952 : using CAD-CAM techniques or NC-techniques
• CPC Class Codes: A61F 2002/3097 : using laser
• CPC Class Codes: A61F 2002/3611 : Heads or epiphyseal parts of femur
• CPC Class Codes: A61F 2002/3625 : Necks
• CPC Class Codes: A61F 2002/3631 : with an integral complete or partial peripheral collar or bearing shoulder at its base
• CPC Class Codes: A61F 2002/365 : Connections of heads to necks
• CPC Class Codes: A61F 2230/0017 : Angular shapes
• CPC Class Codes: A61F 2230/0019 : rectangular
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0076 : ellipsoidal or ovoid
• CPC Class Codes: A61F 2250/0058 : Additional features; Implant or prostheses properties not otherwise provided for
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 : Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: A61F 2310/00089 : Zirconium or Zr-based alloys
• CPC Class Codes: A61F 2310/00131 : Tantalum or Ta-based alloys
• CPC Class Codes: A61F 2310/00179 : Ceramics or ceramic-like structures
• CPC Class Codes: A61F 2310/00269 : based on metal carbides
• CPC Class Codes: A61F 2310/00329 : Glasses, e.g. bioglass
• CPC Class Codes: B23K 2103/14 : Titanium or alloys thereof
• CPC Class Codes: B32B 3/30 : characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: C23F 1/02 : Local etching

Abstract

Textured surface having micro recesses such that the outer surface overhangs the micro recesses. Embodiments of the textured surface include sharp edges for promoting bone deposition and growth within the micro recesses, protrusions of varying depth from the surface that include overhangs, and micro recesses that are at least partially defined by complex ellipsoids.

Claims

1. A prosthetic device comprising:

a selected repeatable pattern having

a surface defining a cavity having a geometry characterized by at least one complex ellipsoid, and

an undercut face projecting over a portion of the cavity.

2. The prosthetic device of claim 1 having an outer surface and a rib outwardly protruding from the outer surface.

3. The prosthetic device of claim 2 wherein the rib comprises a cross sectional geometry taken from the group consisting of v-shaped, keystone, curved, trapezoidal, undercut, hourglass, and square.

4. The prosthetic device of claim 2 wherein the rib comprises a rib surface that is substantially smooth.

5. The prosthetic device of claim 2 further comprising:

a longitudinal axis,

a wall, disposed about the longitudinal axis, characterized by an inner surface and the outer surface, and

an aperture extending from the inner surface to the outer surface.

6. The prosthetic device of claim 2 wherein the rib is a thread.

7. The prosthetic device of claim 6 wherein the thread is a self-taping thread.

8. The prosthetic device of claim 6 comprising a first end and a second end, the thread extending from proximate the first end to proximate the second end.

9. The prosthetic device of claim 6 wherein the thread is continuous.

10. The prosthetic device of claim 6 wherein the thread is segmented.

11. The prosthetic device of claim 1 further comprising a longitudinal axis, and a plurality of ribs outwardly projecting from the outer surface, the ribs being radially disposed about the longitudinal axis.

12. The prosthetic device of claim 11 wherein the ribs are substantially parallel to each other.

13. The prosthetic device of claim 11 wherein the ribs are longitudinally disposed on the device.

14. The prosthetic device of claim 11 wherein the ribs are disposed on the device oblique to the longitudinal axis.

15. A prosthetic device comprising:

a plurality of cavities recessed into the prosthetic device;

a plurality of curved concave surfaces having a complex ellipsoid shape, each of the plurality of concave surfaces at least partially defining a bottom of one of the plurality of cavities;

the plurality of curved concave surfaces further defining a plurality of projections extending from the bottom of the cavities to form an undercut surface.

wherein the plurality of cavities and the plurality of projections are arranged in a selected repeatable pattern.

16. The prosthetic device of claim 15 wherein the complex ellipsoid is a non-spherical complex ellipsoid.

17. The prosthetic device of claim 15 wherein the plurality of curved concave surfaces are serially aligned to form a repeating pattern.

18. The prosthetic device of claim 17 wherein the repeating pattern is a saw-tooth pattern.

19. The prosthetic device of claim 15 wherein the complex ellipsoid shape is substantially identical for at least two of the curved concave faces.

20. The prosthetic device of claim 15 wherein the complex ellipsoid shape is substantially identical for substantially all of the curved concave faces.

21. The prosthetic device of claim 15 wherein the plurality of projections have a geometry defined by a relationship of at least two complex ellipsoids.

22. The prosthetic device of claim 15 wherein the plurality of projections include a peak coincident with an outer surface of the prosthetic device.

23. The prosthetic device of claim 15 wherein the plurality of projections include a peak located between the bottom and an original outer surface of the prosthetic device.

24. The prosthetic device of claim 15 wherein the plurality of projections include a peak located between the bottom and an original outer surface of the prosthetic device the peak being defined by at least two complex ellipsoids that do not overlap one another.

25. The prosthetic device of claim 15 wherein the plurality of projections include a peak taken from the group consisting of a) coincident with an original outer surface of the prosthetic device, b) located between the bottom and the original outer surface and being defined by at least two overlapping complex ellipsoids, c) located between the bottom and the original outer surface and defined by at least two complex ellipsoids that do not overlap one another, and d) combinations thereof.