Telescopic bone plate for use in bone lengthening by distraction osteogenesis

• US 5,902,304 A
• Filed: 11/27/1996
• Issued: 05/11/1999
• Est. Priority Date: 12/01/1995
• Status: Expired due to Fees

• Current Assignee: University of Toronto Innovations Foundation
• Original Assignee: University of Toronto Innovations Foundation
• Inventors: Freeman, Eric, Walker, David A., Altuna, Gurkan
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Woo, Julian W.
• Application Number:
  US08/757,475
• Time in Patent Office: 895 Days
• Field of Search: 606/69, 606/70, 606/71, 606/105, 606/57, 606/58, 606/62, 606/63
• US Class Current: 606/71
• CPC Class Codes: A61B 17/663 for jaw bones, e.g. subcutaneous distractors with external access periodontal bone regeneration A61C8/0006
• CPC Class Codes: Y10S 606/903 Cranial and facial plate

Abstract

The invention is a telescopic bone plate for distracting osteotomically separated bone sections. In a preferred embodiment, the telescopic bone plate consists of a top bone plate and a bottom bone plate longitudinally, laterally and vertically adjustable relative to each other and including a device for fastening the telescopic bone plate to bone. A telescopic member adjusts the relative positions of the top and bottom bone plate to each other. The telescopic member is actuated internally to the patient and may be actuated intraorally in one variation.

Claims

1. A telescopic bone plate for distracting osteotomically separated bone sections, the telescopic bone plate having a longitudinal axis and a lateral axis and comprising:

a top bone plate and a bottom bone plate adjustable relative to each other in at least a superior inferior direction substantially perpendicular to both the longitudinal axis and the lateral axis of the telescopic bone plate, and including means for fastening the telescopic bone plate to bone, at least one displacement means to adjust the positions of the top bone plate and bottom bone plate relative to each other, said displacement means including telescopic means which is actuated in a superior inferior plane, and

wherein the displacement means is able to be actuated internally to a patient.

2. The telescopic bone plate of claim 1, wherein the displacement means is configured for actuation intraorally.

3. The telescopic bone plate of claim 1, wherein the top bone plate and the bottom bone plate are further adjustable relative to one another in a medial lateral direction and substantially parallel to the lateral axis of the telescopic bone plate wherein said displacement means further comprises a telescopic means which is actuated in a medial lateral plane.

4. The telescopic bone plate of claim 1, wherein the top bone plate and the bottom bone plate are further adjustable relative to each other in an anterior posterior direction, substantially parallel to the longitudinal axis of the top telescopic bone plates, and wherein said displacement means further comprises a telescopic means which actuates the top bone plate and the bottom bone plate in an anterior posterior direction.

5. The telescopic bone plate of claim 1, wherein the top bone plate further comprises a top panel and the bottom bone plate further comprises a bottom panel, wherein the top panel overlays the bottom panel and wherein the telescopic means is located between the top panel and the bottom panel.

6. The telescopic bone plate of claim 1, further comprising a casing for the telescoping means of the bone plate.

7. The bone plate of claim 1, wherein the displacement means is a Jack screw assembly.

8. The bone plate of claim 7, wherein the Jack screw assembly is adapted for actuation intraorally using a control means located outside the patient'"'"'s body.

9. The bone plate of claim 7, wherein the Jack screw assembly is adapted for actuation internally to the patient using a control means located outside the patient'"'"'s body.

25. The telescopic bone plate of claim 11 or claim 1, wherein the displacement means is actuated by a motor.

10. A telescopic bone plate for distracting osteotomically separated bone sections, the plate comprising:

a top bone plate and a bottom bone plate adjustable relative to each other in at least one of three mutually perpendicular directions;

a medial lateral direction, a superior inferior direction and an anterior posterior direction, and including means for fastening the telescopic bone plate to bone, at least one displacement means to adjust the positions of the top bone plate and the bottom bone plate relative to each other, wherein the displacement means is actuated internally to a patient, and is actuated by a motor.

11. The telescopic bone plate for distracting osteotomically separated bone sections, the telescopic bone plate having a longitudinal axis and a lateral axis and comprising:

a top bone plate and a bottom bone plate adjustable relative to each other in at least one of a medial lateral direction substantially parallel to the lateral axis of the telescopic bone plate, and a superior inferior direction substantially perpendicular to the both the longitudinal axis and the lateral axis of the telescopic bone plate, and including means for fastening the telescopic bone plate to one, at least one displacement means to adjust the positions of the top bone plate and the bottom bone plate relative to each other, wherein the displacement means is able to be actuated internally to a patient.

12. The telescopic bone plate of claim 11, wherein the telescopic means is configured for actuation intraorally.

13. The telescopic bone plate of claim 11, wherein the displacement means is actuated on a plane that is substantially the same plane as a plane of the top bone plate or bottom bone plate.

14. The telescopic bone plate of claim 11, wherein the top bone plate and the bottom bone plate have planar surfaces and are adjustable relative to each other in said medial lateral direction, substantially perpendicular to the planar surfaces of the top and bottom bone plates and wherein said displacement means comprises a telescopic means which actuates the top bone plate and the bottom bone plate in a medial lateral plane.

15. The telescopic bone plate of claim 11, wherein the displacement means is actuated in the superior inferior plane substantially perpendicular to both the longitudinal axis and lateral axis of the telescopic bone plate.

16. The telescopic bone plate of claim 11, wherein the displacement means actuates the top bone plate and the bottom bone plate in the medial lateral direction substantially parallel to the lateral axis of the telescopic bone plates.

17. The bone plate of claim 11, wherein the displacement means is a thread screw assembly.

18. The bone plate of claim 17, wherein the thread screw assembly is adapted for actuation intraorally using a control means located outside a patient'"'"'s body.

19. The bone plate of claim 17, wherein the thread screw assembly is adapted for actuation internally to the patient using a control means located outside the patient'"'"'s body.

20. The telescopic bone plate of claim 11, wherein the bone plate has a compressive strength of at least 1,290N.

21. The telescopic bone plate of claim 11, wherein the bone plate has a profile in a superior inferior direction substantially perpendicular to both the longitudinal axis and lateral axis of the telescopic bone plate of less than 6 mm.

22. The telescopic bone plate of claim 11 or claim 2, wherein one of the bottom bone plate and the top bone plate is inclined relative to the other.

23. The telescopic bone plate of claim 11 or claim 2, wherein at least one of said top bone plate and said bottom bone plate have holes therethrough, and one or more slits between the holes to facilitate the contouring and fastening of the at least one of said top bone plate and said bottom bone plate to the bone.

24. The telescopic bone plate of claim 11, wherein the adjustable distance between the top bone plate and the bottom bone plate is at least 10 mm.

26. A telescopic bone plate for distracting osteotomically separated bone sections telescopic bone plate having a longitudinal axis and a lateral axis and comprising:

a top bone plate and a bottom bone plate adjustable relative to each other in at least two of a medial lateral direction, substantially parallel to the lateral axis of the telescopic bone plate, a superior inferior direction substantially perpendicular to both the longitudinal axis and the lateral axis of the telescopic bone plate, and an anterior posterior direction, substantially parallel to the longitudinal axis of the telescopic bone plate and including means for fastening the telescopic bone plate to bone, at least two displacement means for adjusting the positions of the top bone plate and the bottom bone plate relative to each other in at least two of three mutually perpendicular planes a medial lateral plane, a superior inferior plane, and an anterior posterior plane.

27. A telescopic bone plate according to claim 26, including three displacement means for adjusting the relative positions of the top bone plate and the bottom bone plate to each other in said medial lateral plane, said superior inferior plane and said anterior posterior plane.

28. A telescopic bone plate of claim 26, for implantation is an oral cavity, wherein the displacement means are configured for location in said oral cavity.

29. A telescopic bone plate of claim 28, further including actuating means for actuating the displacement means to adjust the relative positions of the top and bottom bone plates, the actuating means being coupled to the displacement means and being locatable in said oral cavity.

30. The telescopic bone plate for claim 26, wherein a first one of said displacement means is a telescopic means which is actuated in an anterior posterior plane substantially parallel to the longitudinal axis of the telescopic bone plate.

31. The telescopic bone plate of claim 26, wherein a first one of said displacement means is actuated in a superior inferior plane substantially perpendicular to both the longitudinal axis and lateral axis of the telescopic bone plate.

32. The telescopic bone plate of claim 26, wherein a first one of said displacement means is actuated in a medial lateral plane substantially parallel to the lateral axis of the telescopic bone plate.

33. The telescopic bone plate of claim 26, wherein the top bone plate further comprises a top panel and the bottom bone plate further comprises a bottom panel, wherein the top panel overlays the bottom panel and wherein a first one of said displacement means is located between the top panel and the bottom panel.

34. The bone plate of claim 26, including a control means locatable outside of a patient'"'"'s body for actuating the displacement means to adjust the relative positions of the top and bottom bone plates relative to one another.

35. The telescopic bone plate of claim 26, wherein the bone plate has a profile in the superior inferior direction substantially perpendicular to both of the longitudinal axis and lateral axis of the telescopic bone plate of less than 6 mm.

36. The telescopic bone plate of claim 26, wherein one of the bottom bone plate and the top bone plate is inclined relative to the other.

37. The telescopic bone plate of claim 26, wherein the adjustable distance between the top and the bottom bone plates is at least 10 mm.

38. The telescopic bone plate of claim 26, wherein the displacement means are actuated by a motor.

39. The telescopic bone plate of claim 27, wherein one of the bottom bone plate and the top bone plate is inclined relative to the other.