Bone support type bone cutting and navigation registration guide plate for temporal-mandibular joint arthroplasty

Abstract

The invention relates to a bone support type bone cutting and navigation registration guide plate for temporal-mandibular joint arthroplasty. The guide plate comprises an upper fixing part, a lower fixing part and a connecting part, wherein the inner surface structures of the upper fixing part and the lower fixing part are matched with the shape of the outer contour of the jaw of a patient; the upper fixing part and the lower fixing part are connected through the connecting part; a bone cutting groove is formed between the upper fixing part and the lower fixing part; fixing holes and registration points are respectively arranged in the upper fixing part and the lower fixing part; the registration points are of a concave point structure. The bone cutting position can be accurately and stably positioned by the invention; the fast registration of the navigation in the operation can be realized; the efficient implementation of the operation is facilitated; the operation time is shortened,and the bleeding and side effects are reduced.

Description

technical field [0001] The invention belongs to the technical field of osteotomy positioning, in particular to a bone-supported osteotomy and navigation registration guide plate for temporomandibular arthroplasty. Background technique [0002] Temporomandibular arthroplasty is one of the routine surgeries in oral craniomaxillofacial department. Temporomandibular joint ankylosis refers to the difficulty or complete inability to open the mouth due to organic lesions of the joint and the tissues around the joint. According to the location of the lesion, it is divided into: intra-articular ankylosis, extra-articular ankylosis and mixed ankylosis. Temporomandibular arthroplasty is the only effective treatment for true temporomandibular joint ankylosis (intra-articular ankylosis). The purpose of the surgery is to remove the sticky bone of the joint disease and form a pseudarthrosis, so as to restore the mandibular movement and chewing function. [0003] In traditional surgery, s...

AI Technical Summary

Problems solved by technology

However, the biggest problem with navigation-based arthroplasty is the navigation registration time. Since the patient’s surgical field exposure field is relatively small and there are few registration points on the surface of bone tissue, it is difficult to ensure the registration accuracy. Therefore, the depth of navigation for this operation There is a large error

In addition, the selection of navigation registration points for traditional arthroplasty can also select the salient points of the teeth in the oral cavity for registration, but the registration based on the salient points of the teeth has the following disadvantages: 1. The surface of the teeth is smooth, so It takes a long time for registration, which makes the registration time much longer than the operation time; 2. The tooth area is far away from the patient's operation area, that is, the registration point area is far away from the patient's operation area, and in terms of the principle of navigation, the registration area The registration accuracy is the highest, the farther the distance, the worse the accuracy

Insufficient accuracy of the surgical area leads to poor pre-operative design and ineffective implementation, and the operation takes longer, leading to more bleeding, severe postoperative reactions and more side effects

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