Mandibular Fixation Device

• US 20180161068A1
• Filed: 12/09/2016
• Published: 06/14/2018
• Est. Priority Date: 12/09/2016
• Status: Active Grant

• Current Assignee: Metal Industries Research and Development Centre
• Original Assignee: Metal Industries Research and Development Centre
• Inventors: Wang, Yue-Jun, Tsai, Tung-Lin, Tseng, Chun-Chieh, Weng, Li-Wen, Lin, Chih-Lung
• Granted Patent: US 10,258,379 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/663 for jaw bones, e.g. subcutaneous distractors with external access periodontal bone regeneration A61C8/0006
• CPC Class Codes: A61B 2017/681 Alignment, compression, or distraction mechanisms

Abstract

A mandibular fixation device is provided to overcome the low operability of the conventional mandibular fixation device. The mandibular fixation device includes a sleeve, a first screw rod, a second screw rod and two positioning members. The sleeve includes two ends respectively provided with first and second screw holes. The first and second screw holes have opposite spiral directions. The first screw rod has a first threaded portion and a first assembly portion. The first threaded portion is threadedly engaged with the first screw hole, and the first assembly portion is located outside of the sleeve. The second screw rod has a second threaded portion and a second assembly portion. The second threaded portion is threadedly engaged with the second screw hole, and the second assembly portion is located outside of the sleeve. The two positioning members are coupled with the first and second assembly portions, respectively.

Claims

1. A mandibular fixation device comprising:

a sleeve having two ends respectively provided with a first screw hole and a second screw hole, wherein the first screw hole has a spiral direction opposite to a spiral direction of the second screw hole;

a first screw rod having a first threaded portion and a first assembly portion, wherein the first threaded portion is threadedly engaged with the first screw hole, wherein the first assembly portion is located outside of the sleeve;

a second screw rod having a second threaded portion and a second assembly portion, wherein the second threaded portion is threadedly engaged with the second screw hole, wherein the second assembly portion is located outside of the sleeve; and

two positioning members coupled with the first and second assembly portions, respectively.

2. The mandibular fixation device as claimed in claim 1, wherein the first screw hole is coaxial with the second screw hole.

3. The mandibular fixation device as claimed in claim 1, wherein the first screw hole has a same thread pitch as the second screw hole.

4. The mandibular fixation device as claimed in claim 1, wherein the sleeve has a central portion being in a form of a hexagonal prism.

5. The mandibular fixation device as claimed in claim 1, wherein each of the two positioning members comprises a ring body and a rotating member, wherein the rotating member comprises a first end that is fixed to the first assembly portion of the first screw rod or the second assembly portion of the second screw rod, and wherein the rotating member comprises a second end rotatably connected to the ring body.

6. The mandibular fixation device as claimed in claim 5, wherein the ring body is in a form of a C-shaped ring having an opening.

7. The mandibular fixation device as claimed in claim 5, wherein the rotating member comprises an upper screwing tab and a lower screwing tab, wherein the upper screwing tab has a through-hole, wherein the lower screwing tab has a screwing hole, wherein the first assembly portion of the first screw rod or the second assembly portion of the second screw rod is in a form of a protruding ring and extends into a space between the upper screwing tab and the lower screwing tab, and wherein a screw extends through the through-hole of the upper screwing tab and the first or second assembly portion, and is threadedly engaged with the screwing hole of the lower screwing tab.

8. The mandibular fixation device as claimed in claim 1, wherein each of the two positioning members comprises a connection portion and a plurality of screwing portions, wherein the connection portion is fixed to the first assembly portion of the first screw rod or the second assembly portion of the second screw rod, and wherein the plurality of screwing portions is connected to the connection portion and comprises a plurality of through-holes.

9. The mandibular fixation device as claimed in claim 8, wherein the connection portion comprises an upper screwing tab and a lower screwing tab, wherein the upper screwing tab comprises a through-hole, wherein the lower screwing tab comprises a screwing hole, wherein the first assembly portion of the first screw rod or the second assembly portion of the second screw rod is in a form of a protruding ring and extends into a space between the upper screwing tab and the lower screwing tab, and wherein a screw extends through the through-hole of the upper screwing tab and the first or second assembly portion, and is threadedly engaged with the screwing hole of the lower screwing tab.

10. The mandibular fixation device as claimed in claim 1, wherein the first assembly portion is mounted to one of two axial ends of the first screw rod, wherein the first screw rod has a maximal diameter between the first threaded portion and another of the two axial ends of the first screw rod, wherein the second assembly portion is mounted to one of two axial ends of the second screw rod, wherein the second screw rod forms a channel being in an open state at another of the two axial ends of the second screw rod, and wherein the channel has a minimal diameter larger than the maximal diameter of the first screw rod.

11. The mandibular fixation device as claimed in claim 1, wherein the first and second screw rods have a same structure.

12. The mandibular fixation device as claimed in claim 11, wherein the first assembly portion is mounted to one of two axial ends of the first screw rod, wherein another of the two axial ends of the first screw rod forms a first stopper portion, wherein the first threaded portion is located between the first assembly portion and the first stopper portion, and wherein the first stopper portion has a flat end face.