A bone modification guide plate assembly for artificial temporomandibular joint replacement

Abstract

The invention discloses a bone trimming guide plate assembly for artificial temporomandibular joint replacement. The joint tubercle guide plate is attached to the outer surface of the zygomatic arch, the lower edge of the joint tubercle guide plate is blade-shaped or has a shoulder; the zygomatic arch guide plate is attached to On the outer side of the zygomatic arch, the zygomatic arch guide plate is U-shaped, and the U-shaped opening is blade-shaped; the condylar guide plate is attached to the outer surface of the condyle, and the upper edge of the condylar guide plate is blade-shaped or has a shoulder; the ascending branch guide plate Attached to the outer surface of the ascending ramus of the mandible, the upper part of the ascending ramus guide plate is hollowed out, and the hollowed out part is blade-shaped. Accurately guide the osteotomy of the bottom of the maxillary articular tubercle, the resection of the mandibular condyle, and the grinding of the lateral surface of the zygomatic arch and the lateral surface of the ascending ramus to reduce unnecessary bone loss.

Description

technical field [0001] The invention relates to a medical auxiliary device, in particular to an artificial temporomandibular joint replacement bone trimming guide plate assembly. Background technique [0002] The standard artificial temporomandibular joint cannot fully match the shape of the patient's jaw, so each patient must be modified to adapt to the shape of the prosthesis, mainly for the maxillary zygomatic arch, joint tubercle, mandibular condyle and outer ascending ramus. side. As for jaw modification, there is no clinical tool for guiding bone modification in China. Therefore, bone modification has certain blindness and will cause unnecessary loss of bone mass. Secondly, because the bone material to be ground by bone trimming is cortical bone, which is the hardest part of the jaw, blind grinding will greatly reduce the strength of the jaw, and the thickness of the zygomatic arch itself is relatively thin. Blind grinding may cause the upper prosthesis to be artifici...

AI Technical Summary

Problems solved by technology

As for the revision of the jaw, there is no clinically applicable tool for bone revision in China. Therefore, the bone revision has a certain blindness and will cause unnecessary loss of bone mass.

Secondly, because the bone material to be ground by bone trimming is cortical bone, which is the hardest part of the jaw, blind grinding will greatly reduce the strength of the jaw, and the thickness of the zygomatic arch itself is relatively thin. Blind grinding may cause the upper prosthesis to be artificial. The glenoid fossa cannot be fixed with screws; again, because the maxillary zygomatic arch is located close to the skull base, the risk is high. If the grinding is too much, it may damage the skull base and cause cerebrospinal fluid leakage; and the inner side of the mandibular condyle is intramandibular The arteriovenous and vascular bundles are easy to damage and cause massive bleeding during bone trimming, so a guide plate is needed to assist in precise osteotomy to reduce the risk of nerve and blood vessel injury

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