Maxillomandibular fixation devices

Patent metadata

Field	Value
Publication number	US-10470806-B2
Application number	US-201815891144-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Feb 7, 2017
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A maxillomandibular fixation (MMF) device having an arch bar with a plurality of spaced tabs and gaps, and further having apertured mounting plate members mounted onto the arch bar, each mounting plate member having a slot to receive a tab on the arch bar, whereby the mounting plate members may be repositioned laterally along the arch bar from one tab to another prior to affixing the MMF device to the maxilla or mandible of a patient in order to position the mounting plate members at locations where the underlying tooth root will not be damaged by insertion of a bone screw.

First claim

We claim:

1. A maxillomandibular fixation device comprising:
an arch bar comprising an elongated arch bar main body having a facing edge, tab members spaced along said facing edge, said tab members separated by gaps, and wire retention projection members positioned on said arch bar main body, wherein a plurality of said tab members and a plurality of said gaps are located between said wire retention projection members;
mounting plate members disposed on said arch bar main body, said mounting plate members comprising a mounting plate main body, a screw-receiving aperture disposed in said main body, and a coupling portion, wherein said mounting plate members are laterally movable along said arch bar main body;
said coupling portion comprising a curved midsection, a slot disposed in said curved midsection, said slot defining two leg segments, an end and an open area, wherein said coupling portion is adapted to receive said arch body main body within said open area;
wherein each of said mounting plate members is adapted to be positioned on said arch bar main body at one of multiple positions between adjacent wire retention projection members such that one of said plurality of tab members located between said wire retention projection members is received within said slot of said mounting plate member and such that said leg segments of said mounting plate member are received within adjacent gaps of said plurality of said gaps located between said wire retention projection members;
wherein a length of said open area of said coupling portion in a inferior or superior direction is greater than the length in the inferior or superior direction of said arch bar main body at a point containing one of said tab members, such that with said mounting plate members shifted in a direction of said main body facing edge the leg segments are positioned beyond said gaps, such that said mounting plate members are movable laterally along said arch bar main body.

2. The device of claim 1 , wherein said tab members, said slots, said leg segments, and said gaps are sized such that angular or lateral in-plane movement of said mounting plate members relative to said arch bar main body is precluded when said coupling portions of said mounting plate members are mated with said tab members and gaps.

3. The device of claim 1 , wherein said tab members comprise sides and are substantially rectangular in configuration such that said sides are parallel.

4. The device of claim 1 , wherein said slot has a constant width in a lateral direction.

5. The device of claim 1 , wherein said end of said coupling portion is affixed to said main body of said mounting plate member.

6. The device of claim 1 , wherein said end of said coupling member is not affixed to said main body of said mounting plate member.

7. The device of claim 1 , further comprising a central tab member and two gaps bounded by a pair of midline stop members, said midline stop members being of greater length than said central tab member, such that lateral movement of one of said mounting plate members disposed between said midline stop members is precluded.

8. The device of claim 1 , wherein said arch bar further comprises end stop members, said end stop members being of greater length than said tab members such that said mounting plate members are retained on said arch bar main body.

9. A maxillomandibular fixation device comprising:
an arch bar comprising an elongated arch bar main body having a facing edge, tab members spaced along said facing edge, said tab members separated by gaps, and wire retention projection members positioned on said arch bar main body;
mounting plate members disposed on said arch bar main body, said mounting plate members comprising a mounting plate main body, a screw-receiving aperture disposed in said main body, and a coupling portion, said coupling portion comprising a curved midsection, a slot disposed in said curved midsection, said slot defining two leg segments, an end and an open area;
wherein each of said mounting plate members is adapted to occupy a mated position relative to said arch bar main body, wherein one of said tab members is received within a slot of a mounting plate member and such that each of said leg segments of said coupling portion is received within one of said gaps adjacent said tab member received within said slot and bounded by another of said tab members, such that lateral movement of said mounting plate member relative to said arch bar main body is precluded;
and wherein each of said mounting plate members is adapted to alternatively occupy a free position relative to said arch bar main body, wherein lateral movement of said mounting plate member relative to said arch bar main body is not precluded, said mounting plate member being shifted in the direction of said facing edge such that said leg segments are removed from said gaps.

10. The device of claim 9 , wherein a length of said open area of said coupling portion in a inferior or superior direction is greater than a length in the inferior or superior direction of said arch bar main body at a point containing one of said tab members.

11. The device of claim 9 , wherein said tab members, said slots, said leg segments, and said gaps are sized such that angular or lateral in-plane movement of said mounting plate members relative to said arch bar main body is precluded when said coupling portions of said mounting plane members are mated with said tab members and gaps.

12. The device of claim 9 , wherein said tab members comprise sides and are substantially rectangular in configuration such that said sides are parallel.

13. The device of claim 9 , wherein said slot has a constant width in a lateral direction.

14. The device of claim 9 , wherein said end of said coupling portion is affixed to said main body of said mounting plate member.

15. The device of claim 9 , wherein said end of said coupling member is not affixed to said main body of said mounting plate member.

16. The device of claim 9 , further comprising a central tab member and two gaps bounded by a pair of midline stop members, said midline stop members being of greater length than said central tab member, such that lateral movement of one of said mounting plate members disposed between said midline stop members is precluded.

17. The device of claim 9 , wherein said arch bar further comprises end stop members, said end stop members being of greater length than said tab members such that said mounting plate members are retained on said arch bar main body.

Assignees

• Kls Martin L P
• Cleveland Clinic Found

Inventors

• Kohler Klaus
• Pinto Jennifer
• Johnston Jr Thomas S
• Papay Francis A

Classifications

• A61B17/8071 Primary

  for the jaw · CPC title

• A61C5/007

  Dental splints; teeth or jaw immobilisation devices; stabilizing retainers bonded to teeth after orthodontic treatments · CPC title

• A61B17/663

  for jaw bones, e.g. subcutaneous distractors with external access (periodontal bone regeneration A61C8/0006) · CPC title

• A61C8/0006

  Periodontal tissue or bone regeneration (support means for endoprosthetic bone substitute or bone graft implants A61F2/2846) · CPC title

• A61B17/8085

  with pliable or malleable elements or having a mesh-like structure, e.g. small strips (A61B17/8071, A61B17/8076 take precedence) · CPC title