Bone-supported osteotomy and navigation registration guide for temporomandibular arthroplasty

Abstract

The present invention relates to a bone-supported osteotomy and navigation registration guide plate for temporomandibular joint arthroplasty, comprising 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 match the outer contour shape of the patient's jaw, the upper fixing part and the lower fixing part are connected by the connecting part, an osteotomy groove is formed between the upper fixing part and the lower fixing part, and a fixing hole and a registration point are respectively provided on the upper fixing part and the lower fixing part, and the registration point is a concave point structure. The present invention can accurately and stably locate the osteotomy position, can realize rapid registration of intraoperative navigation, is conducive to the efficient implementation of the operation, shortens the operation time, and reduces bleeding and side effects.

Description

Technical Field

[0001] The invention belongs to the technical field of osteotomy positioning, and in particular relates to a bone-supported osteotomy and navigation registration guide plate for temporomandibular joint arthroplasty. Background Art

[0002] Temporomandibular joint arthroplasty is one of the routine surgeries in the Department of Oral and Maxillofacial Surgery. Temporomandibular joint ankylosis refers to the difficulty or inability to open the mouth due to organic lesions in the joint and surrounding tissues. According to the location of the lesion, it is divided into: intra-articular ankylosis, extra-articular ankylosis and mixed ankylosis. Temporomandibular joint arthroplasty is the only effective method for treating true temporomandibular joint ankylosis (internal ankylosis). The purpose of the operation is to remove the bone adhered by the joint lesion and form a false joint to restore the mandibular movement and chewing function.

[0003] In traditional surgery, surgeons need to rely on their own clinical experience to determine the position of the osteotomy line during the operation. After navigation surgery was applied to the field of oral and maxillofacial surgery, navigation became a routine technique in arthroplasty. However, the biggest problem with navigation arthroplasty is the navigation registration time. Since the patient's surgical field is relatively small and there are few registration points on the surface of the bone tissue, it is difficult to ensure the registration accuracy. Therefore, there is a large error in the navigation of the depth of this operation. In addition, the selection of navigation registration points for traditional arthroplasty can also select the outer convex points of the teeth in the internal area of ​​the oral cavity for registration. However, the registration based on the outer convex points of the teeth has the following disadvantages: 1. The tooth surface is smooth, and the registration time required is long, resulting in the registration time being much longer than the operation time; 2. The tooth area is far away from the patient's surgical area, that is, the registration point area is far away from the patient's surgical area. According to the principle of navigation, the registration accuracy of the registration area is the highest, and the farther the distance, the worse the accuracy. The insufficient accuracy of the surgical area leads to the failure of good preoperative design to be well and effectively implemented, and the operation time is long, resulting in more bleeding, more severe postoperative reactions of patients, and more side effects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a bone-supported osteotomy and navigation alignment guide for temporomandibular joint arthroplasty, which improves the alignment accuracy and positioning efficiency, assists in the accuracy and depth of osteotomy, and improves the efficiency and safety of the operation.

[0005] The technical solution adopted by the present invention to solve its technical problems is to provide a bone-supported osteotomy and navigation alignment guide for temporomandibular joint arthroplasty, including an upper fixing part, a lower fixing part and a connecting part. The inner surface structures of the upper fixing part and the lower fixing part match the outer contour shape of the patient's jaw. The upper fixing part and the lower fixing part are connected by the connecting part. An osteotomy groove is formed between the upper fixing part and the lower fixing part. The upper fixing part and the lower fixing part are respectively provided with fixing holes and alignment points, and the alignment points are concave point structures.

[0006] The connecting portion is located at one side between the upper fixing portion and the lower fixing portion.

[0007] The other side between the upper fixing part and the lower fixing part is an open osteotomy groove.

[0008] The upper fixing part, the lower fixing part and the connecting part are an integrated structure.

[0009] A wing plate is arranged on the outer side of the upper fixing part and / or the lower fixing part, and a registration point is arranged on the wing plate.

[0010] The registration point is a hemispherical concave point structure.

[0011] Beneficial Effects

[0012] First, the present invention sets the upper fixing part and the lower fixing part based on the characteristic bone shape contour of the mandible, the intraoperative positioning is accurate and stable, and the osteotomy range and osteotomy position are not prone to deviation.

[0013] Second, multiple registration points are provided on the upper fixation part and the lower fixation part, which are distributed in different spatial planes, and can realize rapid registration of intraoperative navigation, which is conducive to the efficient implementation of the operation, shortening the operation time, and reducing bleeding and side effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0016] like Figure 1 The bone-supported osteotomy and navigation registration guide for temporomandibular joint arthroplasty shown in the figure includes an upper fixing part 1, a lower fixing part 2 and a connecting part 3.

[0017] The inner surface structure of the upper fixing part 1 and the lower fixing part 2 is designed according to the outer contour of the patient's jaw, which can effectively fit the patient's jaw and improve the stability of fixation. The upper fixing part 1 and the lower fixing part 2 are connected by a connecting part 3, and the connecting part 3 is located on one side between the upper fixing part 1 and the lower fixing part 2. The upper fixing part 1, the lower fixing part 2 and the connecting part 3 are an integrated structure, which ensures the integrity of the guide plate. The other side between the upper fixing part 1 and the lower fixing part 2 is an open osteotomy groove 4.

[0018] Two fixing holes 5 are provided on the upper fixing part 1, and one fixing hole 5 is provided on the lower fixing part 2. The fixing hole 5 is a circular hole with a diameter of 2 mm. Three wing plates 7 extending outward are provided on the outer side of the upper fixing part 1. A plurality of registration points 6 are scattered on the upper fixing part 1 and the wing plates 7. The registration points 6 are hemispherical concave point structures with a diameter of 1 mm. The existence of the registration points 6 facilitates better use of the navigation probe matching in the temporomandibular arthroplasty and realizes rapid registration of the intraoperative navigation.

Claims

1. A bone-supported osteotomy and navigation registration guide for temporomandibular joint arthroplasty, characterized in that: The invention comprises an upper fixing part (1), a lower fixing part (2) and a connecting part (3), wherein the inner surface structures of the upper fixing part (1) and the lower fixing part (2) match the outer contour shape of the patient's jaw, the upper fixing part (1) and the lower fixing part (2) are connected via the connecting part (3), an osteotomy groove (4) is formed between the upper fixing part (1) and the lower fixing part (2), a fixing hole (5) and a registration point (6) are respectively provided on the upper fixing part (1) and the lower fixing part (2), the registration point (6) is a concave point structure, the connecting part (3) is located at one side between the upper fixing part (1) and the lower fixing part (2), a wing plate (7) is provided on the outer side of the upper fixing part (1) and / or the lower fixing part (2), and the registration point (6) is provided on the wing plate (7).

2. A bone-supported osteotomy and navigation registration guide for temporomandibular joint arthroplasty according to claim 1, characterized in that: The other side between the upper fixing part (1) and the lower fixing part (2) is an open osteotomy groove (4).

3. The bone-supported osteotomy and navigation registration guide for temporomandibular joint arthroplasty according to claim 1, characterized in that: The upper fixing part (1), the lower fixing part (2) and the connecting part (3) are an integrated structure.

4. The bone-supported osteotomy and navigation registration guide for temporomandibular joint arthroplasty according to claim 1, characterized in that: The registration point (6) is a hemispherical concave point structure.

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