Implantable screw and system for socket preservation

• US 9,539,068 B2
• Filed: 07/24/2009
• Issued: 01/10/2017
• Est. Priority Date: 07/24/2009
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Spagnoli, Daniel B., Mobley, Todd A., Scifert, Jeffrey L.
• Primary Examiner(s): NELSON, MATTHEW M
• Application Number:
  US12/508,616
• Publication Number:
  US 20110020768A1
• Time in Patent Office: 2,727 Days
• Field of Search: 433172-176
• US Class Current: 1/1
• CPC Class Codes: A61C 2008/0084 Provisional implants or abutments
• CPC Class Codes: A61C 8/0024 with self-boring cutting edge
• 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: A61C 8/008 Healing caps or the like

Abstract

An implantable screw for preserving the integrity of an oral socket and for maintaining space during bone grafting procedures is provided, where the screw has a healing abutment head having a region adapted to support soft tissue, a threaded shaft and a tip adapted to penetrate bone tissue. The temporary implantable screws provided may be used in conjunction with bone graft materials and are removable for placement of an oral implant.

Claims

1. A temporary implantable screw for preserving the integrity of an oral socket, the screw comprising:

a healing abutment head wherein the head ranges in height from about 3 mm to about 5 mm and ranges in diameter at a base of the head from about 3 mm to about 6 mm, wherein the head has a straight wall design defined by a top surface, a bottom base, and side surfaces, wherein the head has smooth rounded edges between the top surface and the side surfaces and between the bottom base and the side surfaces;

an unthreaded neck extending from the bottom base; and

a shaft for anchoring the screw in the bone, the shaft including a threaded proximal end extending from the neck and a threaded distal end opposite the proximal end, the shaft comprising a middle portion between the proximal end and the distal end, the shaft having a thread extending continuously across the shaft from the proximal end, through the middle portion to the distal end, the thread being adapted to penetrate bone tissue;

wherein the screw is monolithic and has an arcuate shape between the bottom base of the head and the proximal end of the shaft, a major diameter of the thread is about 2.0 mm or less and a minor diameter of the thread is about 1.8 mm or less, and the minor diameter is less than the major diameter.

2. A temporary implantable screw of claim 1, wherein the screw comprises titanium.

3. A temporary implantable screw of claim 1, wherein the height of the head is 5 mm.

4. A temporary implantable screw of claim 1, wherein a length of the shaft ranges from about 8 mm to about 17 mm, and wherein a threading pitch of the distal end of the shaft allows the screw to stabilize in bone after engagement of about 3 mm to about 4 mm of bone.

5. A temporary implantable screw of claim 1, wherein the screw is coated with a material for growing bone.

6. A temporary implantable screw of claim 1, wherein the screw supports a bone graft material.

7. A temporary implantable screw of claim 1, wherein the distal end comprises a tip adapted for self-drilling.

8. A temporary implantable screw of claim 1, wherein an exterior surface of the head is polished so as to provide a finished surface that smooth and grainless such that the finished surface is resistant to plaque and tartar build up.

9. A temporary implantable screw of claim 1, wherein the screw consists of one material.

10. A temporary implantable screw of claim 1, wherein the height of the head is 3 mm.

11. A temporary implantable screw of claim 1, wherein the height of the head is 4 mm.

12. A temporary implantable screw for preserving the integrity of an oral socket, the screw comprising:

a healing abutment head wherein the head ranges in height from about 3 mm to about 5 mm and ranges in diameter at a base of the head from about 3 mm to about 6 mm, wherein the head has a flared design defined by a top surface, a bottom base, and side surfaces, wherein the head has smooth rounded edges between the top surface and the side surfaces and between the bottom base and the side surfaces;

an unthreaded neck extending from the bottom base; and

a shaft for anchoring the screw in the bone, the shaft including a threaded proximal end extending from the bottom base and a threaded distal end opposite the proximal end, the shaft comprising a middle portion between the proximal end and the distal end, the shaft having a thread extending continuously across the shaft from the proximal end, through the middle portion to the distal end, the thread being adapted to penetrate bone tissue;

wherein the screw is monolithic and has an arcuate shape between the bottom base of the head and the proximal end of the shaft, a major diameter of the thread is about 2.0 mm or less and a minor diameter of the thread is about 1.8 mm or less, and the minor diameter is less than the major diameter.

13. A temporary implantable screw of claim 12, wherein the screw comprises titanium.

14. A temporary implantable screw of claim 12, wherein the diameter of the head increases by 1, 1.5, or 2 mm at the top surface of the head relative to the bottom base.

15. A temporary implantable screw of claim 12, wherein a length of the shaft ranges from about 8 mm to about 17 mm, and wherein a threading pitch of the distal end of the shaft allows the screw to stabilize in bone after engagement of about 3 mm to about 4 mm of bone.

16. A temporary implantable screw of claim 12, wherein the screw is coated with a material for growing bone.

17. A temporary implantable screw of claim 12, wherein the distal end comprises a tip adapted for self-drilling.

18. A temporary implantable screw of claim 12, wherein an exterior surface of the head is polished so as to provide a finished surface that smooth and grainless such that the finished surface is resistant to plaque and tartar build up.

19. A method of preserving an oral socket comprising:

implanting a temporary implantable device into an oral socket in a jawbone of a patient, wherein the implantable device comprises;

at least one implantable screw, the screw comprising;

a healing abutment head wherein the head ranges in height from about 3 mm to about 5 mm and ranges in diameter at a base of the head from about 3 mm to about 6 mm and said head is defined by a top surface, a bottom base, and side surfaces, wherein the head has smooth rounded edges between the top surface and the side surfaces and between the bottom base and the side surfaces,

an unthreaded neck extending from the bottom base, and

a shaft adapted for anchoring the screw in the jawbone, the shaft including a threaded proximal end extending from the neck and a threaded distal end opposite the proximal end, the shaft comprising a middle portion between the proximal end and the distal end, the shaft having a thread extending continuously across the shaft from the proximal end, through the middle portion to the distal end, the thread being adapted to penetrate bone tissue,

wherein the screw is monolithic and has an arcuate shape between the bottom base of the head and the proximal end of the shaft, a major diameter of thread is about 2.0 mm or less and a length of the shaft is about 8 mm to about 17 mm;

incorporating a bone growth material on or near the screw; and

removing the implantable device prior to placement of a dental implant.