Adjustable osteotomy guide plate

Abstract

The utility model relates to the field of medical instruments, in particular to an adjustable osteotomy guide plate. The guide plate comprises a guide plate body and limiting assemblies arranged on the two sides of the guide plate body and movably connected with the guide plate body. Each limiting assembly comprises a movable rod arranged on the outer side of the guide plate attaching plate, a connecting pipe arranged outside the movable rod in a sleeving mode, a connecting plate fixedly arranged at the bottom end of the connecting pipe, an ear hook fixedly arranged at the top end of the movable rod, and a first fastening bolt arranged on the outer side wall of the top of the connecting pipe in a threaded and penetrating mode and used for locking movement of the movable rod. The second fastening bolt is arranged on the inner side of the attaching guide plate and sequentially penetrates through the attaching guide plate and the connecting plate; and the fastening nut is matched with the second fastening bolt. The utility model aims at providing an adjustable osteotomy guide plate which solves the problems that for old patients without mandibular teeth, the use position of a guide plate body is difficult to fix through an occlusal plate, so that the guide plate body is easy to move, and the use comfort of the patients is low.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an adjustable osteotomy guide plate. Background Technology

[0002] Mandibular osteotomy is a common cosmetic surgery in maxillofacial surgery. It primarily involves facial contouring through correction of the mandibular angle, excessively prominent lower jawline, and some masseter muscles. Currently, CT or 3D scanning is used to precisely convert surgical guides before surgery. Existing osteotomy guides typically consist of an occlusal plate for fixation with the teeth and a guide body. The occlusal plate fixes the guide body's relative position. However, it's important to note that for elderly patients with absent mandibular teeth, small mandibular teeth, or loose mandibular teeth, it is difficult or even impossible to fix the guide body's position using the occlusal plate alone. Forcibly covering the occlusal plate with the gums or fixing it to loose or narrow mandibular teeth can easily damage the patient's gums and teeth, leading to tooth loss, gingival bleeding, and other problems. Furthermore, because loose or narrow teeth lack sufficient strength, the guide body is prone to movement during surgery if fixed solely by the occlusal plate.

[0003] Therefore, designing an adjustable osteotomy guide plate that can solve the above-mentioned technical problems is a technical issue that needs to be addressed. Utility Model Content

[0004] To address the aforementioned issues, the present invention aims to provide an adjustable osteotomy guide plate, which solves the problem that existing osteotomy guide plates are difficult to use for elderly patients without mandibular teeth due to the difficulty in fixing the position of the guide plate body with an occlusal plate, resulting in easy movement of the guide plate body and low patient comfort.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a guide plate body and limiting components located on both sides of the guide plate body and movably connected to the guide plate body; the guide plate body includes an occlusal plate for occlusal fixation with the patient's teeth, guide plate fitting plates located at both ends of the occlusal plate for fitting against the surface of the human mandible, and connecting ribs connecting the occlusal plate and the guide plate fitting plates and fixedly connected at both ends to the occlusal plate and the guide plate fitting plates respectively; the limiting components are respectively located at the end of the guide plate fitting plates away from the occlusal plate, and each limiting component includes a movable rod located on the outside of the guide plate fitting plate, a connecting tube sleeved on the outside of the movable rod, a connecting plate fixed at the bottom end of the connecting tube, an ear hook fixed at the top end of the movable rod, a first fastening bolt threaded through the top outer wall of the connecting tube for locking the movement of the movable rod, a second fastening bolt located on the inside of the fitting guide plate and passing through the fitting guide plate and the connecting plate in sequence, and a fastening nut cooperating with the second fastening bolt.

[0006] Furthermore, the inner side of the guide plate is provided with an arc-shaped surface for fitting with the surface of the mandible.

[0007] Furthermore, the guide plate body is made of photosensitive resin material.

[0008] Furthermore, the guide plate has several osteotomy grooves at the corresponding osteotomy line positions.

[0009] Furthermore, the occlusal plate is arc-shaped, and the occlusal plate is provided with occlusal grooves for teeth to bite.

[0010] Furthermore, the guide plate has a through hole for the second fastening bolt to pass through.

[0011] Furthermore, the guide plate is provided with a pre-drilled hole for a screw.

[0012] This utility model has the following beneficial effects:

[0013] 1-This utility model provides limiting components on both sides of the guide plate body and uses ear hooks to fix the limiting components to the patient's ear, thereby further assisting in fixing the position of the guide plate body and preventing the guide plate body from easily moving when patients without mandibular teeth use an occlusal plate to fix the position of the guide plate body, thus improving the patient's comfort. Attached Figure Description

[0014] Figure 1 This is a side cross-sectional view of the present invention (cross-sectional view of the limiting component).

[0015] Explanation of reference numerals in the attached figures:

[0016] 1-Guide plate body, 11-Occlusal plate, 12-Guide plate fitting plate, 121-Osteotomy groove, 122-Screw pre-drilled hole, 13-Connecting rib;

[0017] 2-Limiting component, 21-Moving rod, 22-Connecting pipe, 23-Connecting plate, 24-Ear hook, 25-First fastening bolt, 26-Second fastening bolt, 27-Fasting nut. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] See Figure 1 As shown, the solution includes a guide plate body 1 and limiting components 2 located on both sides of the guide plate body 1 and movably connected to the guide plate body 1.

[0020] The guide plate body 1 includes an occlusal plate 11 for occlusal fixation with the patient's teeth, guide plate fitting plates 12 disposed at both ends of the occlusal plate 11 for fitting against the surface of the human mandible, and connecting ribs 13 connecting the occlusal plate 11 and the guide plate fitting plates 12 and fixedly connected at both ends to the occlusal plate 11 and the guide plate fitting plates 12 respectively; preferably, the connecting ribs 13 are bent outward and protrude, so that there is a gap between the connecting ribs 13 and the patient's teeth for installation, which facilitates the occlusal plate 11 and the patient's teeth to bite, making the installation smoother.

[0021] The limiting components 2 are respectively located at the end of the guide plate fitting plate 12 away from the biting plate 11. Each limiting component 2 includes a movable rod 21 located on the outside of the guide plate fitting plate 12, a connecting tube sleeved on the outside of the movable rod 21, a connecting plate 23 fixed at the bottom end of the connecting tube, an ear hook 24 fixed at the top end of the movable rod 21, a first fastening bolt 25 threaded through the top outer wall of the connecting tube for locking the movement of the movable rod 21, a second fastening bolt 26 located on the inside of the fitting guide plate and passing through the fitting guide plate and the connecting plate 23 in sequence, and a fastening nut 27 cooperating with the second fastening bolt 26.

[0022] Furthermore, the inner side of the guide plate fitting plate 12 is provided with an arc-shaped surface for fitting with the surface of the mandible.

[0023] The guide plate body 1 is made of photosensitive resin material, which has the advantages of fast curing speed, high molding accuracy and good surface effect. Ideally, the guide plate body 1 is 3D printed in one piece and through holes (not shown in the figure) are opened on the guide plate bonding plate 12 for the second fastening bolt 26 to pass through.

[0024] Furthermore, osteotomy grooves 121 are formed on the guide plate 12 at positions corresponding to the osteotomy line. The direction of the osteotomy grooves 121 can be determined according to the actual osteotomy plan, and is not limited to the horizontal direction shown in the figure, but can also be vertical, oblique, etc. Optimally, this embodiment provides two osteotomy grooves 121 to facilitate surgical operations of osteotomy on both the left and right sides during segmental osteotomy. The number of osteotomy grooves 121 provided in this embodiment is a preferred implementation, but it is not limited to this; different numbers of osteotomy grooves 121 can be used in other embodiments.

[0025] Furthermore, the occlusal plate 11 is arc-shaped, and the occlusal plate 11 is provided with occlusal grooves for teeth to bite. For patients without mandibular teeth, the occlusal plate 11 is placed on the patient's mandibular gum, and the occlusal groove covers the gum to preliminarily position the use of the guide plate and the mating plate 12 on both sides. For patients with mandibular teeth, the occlusal plate 11 is fixed to bite between at least one mandibular tooth.

[0026] Furthermore, the guide plate 12 is provided with a screw preset hole 122, which can be consistent with the fixation screw hole of the guide plate 12. When osteotomy is performed using the osteotomy guide plate, it can also be fixed through the screw preset hole 122, thereby improving the fixation efficiency.

[0027] The working principle is roughly as follows:

[0028] Based on the integration of preoperative mandibular CT data, digital intraoral scan data, and software 3D reconstruction technology, the guide plates 12 on both sides are first tightly attached to the surface of the patient's mandible. The occlusal plate 11 is then placed on the mandibular alveolar bone of the patient without mandibular teeth. At this time, the fastening nut 27 is unscrewed, the operating angle of the connecting tube is rotated, and the movable rod 21 is stretched so that the ear hook 24 at the top of the movable rod 21 is connected to the patient's ear. Finally, the second fastening bolt 26 is rotated to fix the relative operating position of the limiting component 2, further preventing the guide plates from shifting during the operation.

[0029] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An adjustable osteotomy guide plate, characterized in that: It includes a guide plate body (1) and limiting components (2) located on both sides of the guide plate body (1) and movably connected to the guide plate body (1). The guide plate body (1) includes an occlusal plate (11) for occlusal fixation with the patient's teeth, a guide plate fitting plate (12) disposed at both ends of the occlusal plate (11) for fitting with the surface of the human mandible, and a connecting rib (13) connecting the occlusal plate (11) and the guide plate fitting plate (12) and having both ends fixedly connected to the occlusal plate (11) and the guide plate fitting plate (12) respectively. The limiting components (2) are respectively located at the end of the guide plate fitting plate (12) away from the biting plate (11). Each limiting component (2) includes a movable rod (21) located on the outside of the guide plate fitting plate (12), a connecting tube (22) sleeved on the outside of the movable rod (21), a connecting plate (23) fixed at the bottom end of the connecting tube (22), an ear hook (24) fixed at the top end of the movable rod (21), a first fastening bolt (25) threaded through the top outer wall of the connecting tube (22) for locking the movement of the movable rod (21), a second fastening bolt (26) located on the inside of the fitting guide plate and passing through the fitting guide plate and the connecting plate (23) in sequence, and a fastening nut (27) cooperating with the second fastening bolt (26).

2. The adjustable osteotomy guide plate according to claim 1, characterized in that: The inner side of the guide plate (12) is provided with an arc-shaped surface for fitting with the surface of the mandible.

3. The adjustable osteotomy guide plate according to claim 1, characterized in that: The guide plate body (1) is made of photosensitive resin material.

4. The adjustable osteotomy guide plate according to claim 1, characterized in that: The guide plate (12) has several osteotomy grooves (121) at the corresponding osteotomy line positions.

5. An adjustable osteotomy guide plate according to claim 1, characterized in that: The occlusal plate (11) is arc-shaped and has occlusal grooves for teeth to bite.

6. An adjustable osteotomy guide plate according to claim 1, characterized in that: The guide plate (12) has a through hole for the second fastening bolt (26) to pass through.

7. An adjustable osteotomy guide plate according to claim 1, characterized in that: The guide plate (12) has a screw pre-drilled hole (122).

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