Modular implant with secured porous portion

• US 9,066,771 B2
• Filed: 08/27/2013
• Issued: 06/30/2015
• Est. Priority Date: 07/02/2008
• Status: Active Grant

• Current Assignee: Zimmer Dental Inc. (Zimvie Incorporated)
• Original Assignee: Zimmer Dental Inc. (Zimvie Incorporated)
• Inventors: Collins, Michael Scott, Murray, Jane, Flynn, Harold C Jr.
• Primary Examiner(s): EIDE, HEIDI MARIE
• Application Number:
  US14/010,786
• Publication Number:
  US 20130344459A1
• Time in Patent Office: 672 Days
• Field of Search: 433172-176
• US Class Current: 1/1
• CPC Class Codes: A61C 2008/0046 Textured surface, e.g. roughness, microstructure A61C8/0013 takes precedence
• CPC Class Codes: A61C 8/0006 Periodontal tissue or bone regeneration support means for endoprosthetic bone substitute or bone graft implants A61F2/2846
• 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: A61C 8/0013 with a surface layer, coating
• CPC Class Codes: A61C 8/0018 characterised by the shape
• CPC Class Codes: A61C 8/0022 Self-screwing A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/0037 Details of the shape
• CPC Class Codes: A61C 8/0075 Implant heads specially designed for receiving an upper structure if separable from the implant A61C8/005
• CPC Class Codes: A61K 6/818 comprising zirconium oxide
• CPC Class Codes: A61K 6/831 comprising non-metallic elements or compounds thereof, e.g. carbon
• CPC Class Codes: A61K 6/84 comprising metals or alloys
• CPC Class Codes: A61K 6/884 comprising natural or synthetic resins

Abstract

A modular implant includes a head, an intermediate part configured to engage bone, and an initially separate anchor configured to engage the head so that at least the head and the anchor cooperatively secure the intermediate part on the implant to form the modular implant. At least one of the head, the intermediate part, and the anchor has a plurality of forms, and each form is configured to be assembled on at least one form of the other two of the head, intermediate part, and anchor. The intermediate part may include a porous metal such as tantalum.

Claims

1. A modular implant system, comprising:

a plurality of heads having a plurality of different head forms each head form configured for supporting a dental prosthesis and at least one of the different head forms having an apical end with an exterior threaded portion configured for engaging bone;

a plurality of porous intermediate sleeves having a plurality of different intermediate sleeve forms configured for engaging bone, wherein at least one of the plurality of intermediate sleeve forms is configured to be assembled on at least one of the plurality of different head forms; and

a plurality of initially separate anchors having a plurality of different anchor forms, wherein at least one of the plurality of anchor forms is configured to engage at least one of the plurality of head forms of the head so that at least one of the plurality of head forms and at least one of the plurality of anchor forms can cooperatively secure at least one of the plurality of intermediate sleeve forms of the intermediate sleeve to form a modular implant.

2. The modular implant system of claim 1, wherein the plurality of heads include at least one externally threaded head and at least one press-fit head.

3. The modular implant system of claim 1, wherein each of the plurality of intermediate sleeve forms is at least partially formed from one or more of:

a porous metal,

a porous metal including tantalum,

a ceramic,

a metal,

a polymer,

a resorbable material,

a non-resorbable material,

an organic bone graft,

a synthetic bone material, and

a collagen.

4. The modular implant system of claim 1, wherein each of the plurality of head forms is at least partially formed from one or more of:

titanium,

zirconia,

an esthetic material,

a composite material,

a surface coating,

microthreads,

a polished collar, and

a biological coating.

5. The modular implant system of claim 1, wherein the plurality of intermediate sleeve forms each have an intermediate cross-sectional shape with an outer periphery forming at least one of:

(1 ) a non-circular curved shape,

(2 ) a polygonal shape,

(3 ) both (1 ) and (2 ), and

(4 ) an irregular shape having at least one flat side and at least one curved side.

6. The modular implant system of claim 1, wherein the plurality of at least one of the head, the intermediate sleeve, and the anchor is configured to provide an exterior surface configuration for the implant including:

a surface configured to be easily cleaned of bacteria,

a surface that promotes formation of an epithelial barrier,

a surface that promotes soft tissue formation,

a surface that promotes a soft tissue barrier,

a surface that promotes cortical bone growth, and

a surface that promotes cancellous bone growth.

7. The modular implant system of claim 1, wherein each of the plurality of intermediate sleeve forms defines a longitudinal taper angle, including a taper angle of zero degrees.

8. The modular implant system of claim 1, further comprising:

a plurality of cores, each of the cores configured to extend axially from at least one of the pluralities of heads and anchors; and

a locking mechanism being formed on each core of the plurality of cores, the locking mechanism configured to secure the head to the anchor,

wherein a length of each core corresponds to a length of a corresponding intermediate sleeve.

9. The modular implant system of claim 8, wherein the locking mechanism includes a post formed on an apical portion of each of the plurality of cores, the post configured to be received by a coronally accessible bore in the anchor.

10. The modular implant system of claim 9, wherein the post and anchor include corresponding threads.

11. The modular implant system of claim 8, wherein the locking mechanism includes an apically accessible bore configured to receive an anchor post formed on the anchor.

12. The modular implant system of claim 1, wherein at least one of the intermediate sleeve forms, the head forms, and the anchor forms is configured to be selected for a specific examined patient site to receive the modular implant.

13. The modular implant system of claim 1, wherein one of the plurality of heads is assembled to one of the plurality of intermediate sleeves and one of the plurality of anchors after the intermediate sleeve and the anchor are implanted.

14. The modular implant system of claim 1, wherein each of the plurality of anchors includes an opening configured to receive at least one of a bone chip and tissue when the modular implant is inserted in a patient site.

15. The modular implant system of claim 1, wherein the plurality of head forms include:

a bone-level head with a coronal end configured to be disposed at a crest of a mandible or a maxilla;

a transgingival head with a coronal section configured to extend through gingiva; and

a one-piece implant head comprising a portion configured for engaging the intermediate sleeve and having an integral abutment formed thereon.

16. The modular implant system of claim 1, wherein the at least one of the plurality of head forms, the at least one of the plurality of intermediate sleeve forms, and the at least one of the plurality of anchor forms, when assembled, are configured to define a specified coronal-apical length of the modular implant.

17. The modular implant system of claim 1, wherein the plurality of head and anchor forms each include a different material.