Digital guide plate for depth-keeping bone trimming technology

Abstract

The invention relates to the technical field of medical auxiliary devices, and discloses a digital guide plate for a depth-keeping bone finishing technology, which comprises a depth-keeping bone finishing guide plate, a depth-keeping guide column, an occlusion fixing plate and a connecting rod for connecting the depth-keeping bone finishing guide plate and the occlusion fixing plate, the occlusion fixing plate is accurately prepared through 3D printing according to the three-dimensional shape of teeth of a patient, a plurality of grooves are formed in the occlusion fixing plate, and the grooves are matched with the teeth of the patient in shape; at least four guide grooves are formed in the fixed-depth bone finishing guide plate, fixed-depth guide columns matched with the guide grooves are movably arranged in the guide grooves, and a specific bone finishing depth mark is arranged on each fixed-depth guide column; at least two titanium nail holes are formed in the fixed-depth bone trimming guide plate, and titanium nails are movably arranged in the titanium nail holes. The whole abnormal bone surface can be positioned and trimmed by only one pair of guide plates, the depth-keeping column is guided by the depth-keeping hole to determine the bone trimming depth, real-time navigation in an operation is not needed, the operation time and operation steps are greatly reduced, and operation wounds are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical auxiliary devices, and in particular to a digital guide plate for fixed-depth bone trimming technology. Background Art

[0002] The digital guide for fixed-depth bone trimming technology is an auxiliary tool used in orthopedic surgery. Its purpose is to help surgeons improve accuracy and efficiency when performing bone trimming or reconstruction. It helps surgeons ensure that the cutting and trimming process conforms to the pre-planned path and shape when performing bone cutting by providing a stable and reusable guide structure, thereby reducing surgical errors. This guide is usually made of high-strength materials and can withstand various forces during surgery.

[0003] Although traditional guide plates have played an important role in orthopedic surgery, there are also some technical problems: in traditional trimming methods, since bones need to be cut layer by layer, multiple sets of guide plates are needed, and real-time navigation technology is used to confirm whether the target bone position has been trimmed. This not only increases the complexity and time cost of the operation, but more importantly, there will be certain errors in the guide plate conversion process and navigation. This error may come from the manufacturing accuracy of the guide plate itself, the operation error during the operation, and the individual differences in the patient's bone structure. The accumulation of errors may lead to unsatisfactory surgical results and even affect the patient's postoperative recovery and quality of life. In traditional surgery, in order to ensure that the specified bone trimming position is reached, doctors usually need to use intraoperative navigation systems to monitor and determine in real time whether the target bone position has been trimmed, which improves the accuracy of the operation to a certain extent, but also increases the complexity of the operation and the cost of the equipment. At the same time, there are errors in the intraoperative navigation system itself, such as signal interference, equipment calibration, etc., which may affect the final result of the operation. Traditional guide plates are mostly made of metal or plastic, which may be deficient in biocompatibility, strength and durability. If the precision is not properly controlled during the manufacturing process, it may also affect the practicality and safety of the guide plates. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a digital guide plate for fixed-depth bone trimming technology, which solves the problems of the large number of existing guide plates, large conversion errors and reliance on intraoperative navigation.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a digital guide plate of the fixed-depth bone trimming technology, including a fixed-depth bone trimming guide plate, a fixed-depth guide column, an occlusal fixation plate, and a connecting rod connecting the fixed-depth bone trimming guide plate and the occlusal fixation plate;

[0006] The occlusal plate is precisely prepared by 3D printing according to the three-dimensional shape of the patient's teeth. Multiple grooves are set on the occlusal plate. The grooves match the shape of the patient's teeth to ensure the uniqueness of the grooves in the position behind the teeth.

[0007] At least four guide grooves are arranged on the depth-fixing bone trimming guide plate, and depth-fixing guide columns matching the guide grooves are movably arranged in the guide grooves, and each depth-fixing guide column is provided with a specific bone trimming depth mark; at least two titanium nail holes are arranged on the depth-fixing bone trimming guide plate, and titanium nails are movably arranged in the titanium nail holes.

[0008] The beneficial effects of the present invention are as follows: the present invention can accurately extract the three-dimensional shape of the patient's teeth through preoperative CT scanning, and then prepare an occlusal fixation plate that matches the tooth shape through 3D printing technology. The grooves that accurately match the patient's tooth shape are placed on the patient's teeth to fix the deep bone trimming guide plate. The occlusal fixation plate improves the stability and positioning accuracy of the deep bone trimming guide plate in the oral cavity, avoiding the problem of shaking or positional displacement of the deep bone trimming guide plate that occurs in traditional methods. The connecting rod serves as a connecting component between the deep bone trimming guide plate and the occlusal fixation plate, which effectively enhances the structural stability of the digital guide plate of the deep bone trimming technology.

[0009] When in use, the depth of bone trimming is determined according to the preoperative surgical plan, and a fixed depth guide column is movably set in the guide groove on the fixed depth bone trimming guide plate. The fixed depth guide column is a tool used to determine the depth of bone trimming at that point during the operation. The number of guide grooves is determined according to the area of ​​the bone to be trimmed, and the corresponding depth mark is set on the fixed depth guide column. The corresponding depth is consistent with the depth of the bone to be trimmed. The fixed depth bone trimming guide plate is matched and positioned through the normal bone tissue near the bone to be trimmed by the patient. After being positioned, it is stabilized with titanium nails. Then, the bone surface to be trimmed is punched along the guide groove to a predetermined depth using a bone dynamic device. The fixed depth guide column is inserted into the guide groove to confirm whether the target depth has been reached, and the above operation is repeated until all the fixed depth holes on the bone surface to be trimmed have reached the predetermined depth. After completing all steps, the fixed depth bone trimming guide plate is removed. Then, the bone surface near the fixed depth hole is polished and trimmed using a bone dynamic device until the fixed depth hole depth is reached, that is, the target bone surface is reached, and finally, the bone tissue between each fixed depth space is polished smooth, that is, the trimming purpose is completed.

[0010] Furthermore, in the digital guide plate of the above-mentioned deep bone trimming technology, the edges of the deep bone trimming guide plate and the occlusal fixation plate are arc-shaped.

[0011] The beneficial effect of adopting the above further solution is that the curved edge can better fit the patient's oral structure and reduce the damage of the oral soft tissue by the sharp edge.

[0012] Furthermore, in the digital guide plate of the above-mentioned fixed-depth bone trimming technology, the diameter of the guide groove is 2mm, the distance between two adjacent guide grooves is 5mm-10mm, each guide groove corresponds to a specific bone trimming depth, and each bone trimming depth is obtained through virtual surgical simulation based on preoperative CT and target bone.

[0013] The beneficial effect of adopting the above further solution is that in orthopedic surgery, the contact surface between the device and the bone tissue is subjected to complex mechanical loads. Reasonable hole spacing design can make the stress more evenly distributed and reduce local stress concentration.

[0014] Furthermore, the digital guide plate of the above-mentioned fixed-depth bone trimming technology and the shape of the fixed-depth bone trimming guide plate are accurately prepared through 3D printing based on the abnormal bone shape and size of the patient.

[0015] The beneficial effects of adopting the above further scheme are: each person's bone shape and the area that needs to be trimmed are different. Customizing the deep bone trimming guide plate shape according to the patient's jaw shape and size can better adapt to the anatomical structure of each patient, and can help surgeons position and fix the guide plate more quickly, thereby shortening the operation time and reducing the risk of infection.

[0016] Furthermore, the digital guide plate of the above-mentioned fixed-depth bone trimming technology, the fixed-depth bone trimming guide plate is specifically a photosensitive resin fixed-depth bone trimming guide plate, and the fixed-depth guide column is specifically a photosensitive resin fixed-depth guide column.

[0017] The beneficial effects of adopting the above further scheme are: photosensitive resin has excellent molding ability and fine processing characteristics. Through 3D printing technology, highly suitable surgical guides and guide posts can be quickly produced according to the patient's specific anatomical structure, greatly improving the precision and efficiency of customization. The photosensitive resin has been improved to have good biocompatibility and can reduce the risk of tissue rejection and postoperative inflammation. In addition, this material has a light weight and suitable mechanical strength, which can provide the necessary support without placing too much burden on bone tissue.

[0018] Furthermore, in the digital guide plate of the above-mentioned fixed-depth bone trimming technology, the depth mark on the fixed-depth guide column includes a plurality of scale bars, and the interval between two adjacent scale bars is 1 mm.

[0019] The beneficial effects of the present invention are as follows: the present invention can accurately control the depth of bone trimming during surgery through the precisely designed guide groove and fixed depth guide column, ensuring that the shape of the bone after trimming is consistent with the predetermined appearance. This trimming method that connects points as lines and uses equal depth points and contour lines for guidance effectively avoids the errors caused by guide plate conversion and repeated navigation in traditional surgery, and significantly improves the accuracy and success rate of the surgery.

[0020] Compared with the traditional layer-by-layer cutting and multiple navigation tests, the present invention only needs one pair of guide plates to complete the entire bone surface positioning process, without the need for real-time intraoperative navigation, thus greatly reducing the operation time and operation steps. By reducing the use of intraoperative navigation software and the number of bone cutting guides, this technology helps to reduce medical costs. At the same time, its efficient surgical process also reduces the patient's hospital stay and recovery time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the digital guide plate of the Ben Ding deep bone trimming technology;

[0022] Figure 2 This is a schematic diagram of the structure of the digital guide plate of the Ben Ding deep bone trimming technology;

[0023] Among them: 1. Depth-fixing bone trimming guide plate, 2. Occlusal fixation plate, 3. Guide groove, 4. Depth-fixing guide column, 5. Depth mark, 6. Titanium nail hole, 7. Titanium nail, 8. Groove, 9. Connecting rod. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0025] In bone tissue surgery, bone trimming is a delicate and critical operation, especially for the complex anatomical structure of the maxillofacial region. Traditional trimming methods require cutting layer by layer and multiple sets of guide plates to assist, which not only increases the complexity of the surgery, but also produces large errors when switching the guide plates. At the same time, traditional methods also require real-time navigation during surgery to ensure the accuracy of the cutting, which undoubtedly prolongs the operation time.

[0026] like Figures 1-2As shown, the present embodiment provides a digital guide plate for a fixed-depth bone trimming technology, which consists of a fixed-depth bone trimming guide plate 1 and an occlusal fixation plate 2, which are tightly connected by a connecting rod 9. The edges of the fixed-depth bone trimming guide plate 1 and the occlusal fixation plate 2 are designed to be arc-shaped to adapt to the physiological structure of the maxillofacial region. At least four guide grooves 3 are provided on the fixed-depth bone trimming guide plate 1, and fixed-depth guide columns 4 are movably provided in the holes. These fixed-depth guide columns 4 are marked with clear depth marks 5 so as to quickly and accurately judge the cutting depth during surgery. In the present embodiment, the depth mark 5 on the fixed-depth guide column 4 includes a plurality of scale bars, and the interval between two adjacent scale bars is 1 mm. In addition, the fixed-depth bone trimming guide plate 1 is also provided with a titanium nail hole 6 for fixing the guide plate to ensure its stability during surgery.

[0027] Through preoperative CT scanning, the three-dimensional shape of the teeth can be extracted, and the shape of the teeth can be transferred to the occlusal plate 2 using digital printing technology. The occlusal plate 2 is digitally molded to accurately match the shape of the patient's teeth, thereby ensuring that when the occlusal plate 2 is placed on the teeth, there will be no shaking and the position is unique. The fixing process of the occlusal plate 2 fully utilizes the complex and unique shape of the teeth. This uniqueness provides a guarantee for the stability of the deep bone trimming guide plate 1 and ensures the accuracy of the entire surgical process.

[0028] According to the patient's CT or MRI imaging data, the range of bone tissue that needs to be trimmed is clarified, and the guide plate and the guide groove 3 and guide column position thereon are designed. Finally, the digital model is converted into a physical guide plate using three-dimensional printing technology. The selection of materials is the key to ensuring the functionality and biocompatibility of the guide plate. In this embodiment, photosensitive resin is used as the main material for the fixed-depth bone trimming guide plate 1 and the fixed-depth guide column 4. It has good formability and biocompatibility, and its photocuring characteristics can quickly realize three-dimensional printing of complex structures, ensuring the accuracy and strength of the guide plate. In the design, ensure that the position and depth of the guide groove 3 are consistent with the depth of the bone tissue that needs to be trimmed. A guide groove 3 is designed every 5mm-10mm on the fixed-depth bone trimming guide plate 1, and the diameter of the guide groove 3 is 2mm. Such a design density can ensure the accuracy of the operation.

[0029] During the operation, the depth-fixed bone trimming guide plate 1 is first matched and positioned with the nearby normal bone tissue, and then firmly fixed with titanium nails 7. Then, the bone dynamic device is used to punch holes in the guide groove 3 corresponding to the trimmed bone surface until the predetermined depth is reached. In this process, the depth-fixed guide column 4 can not only help to quickly determine the depth of the drilling, but also ensure the accuracy of the operation. Whenever a depth-fixed hole reaches the predetermined depth, the corresponding depth-fixed guide column 4 is inserted into the guide groove 3 to confirm whether the target depth has been reached. Repeat this process until all depth-fixed holes reach the predetermined depth.

[0030] After the drilling is completed, the depth-fixing bone trimming guide plate 1 is removed, and the bone dynamic device is used again to trim along the hole. During this process, the overall bone surface should be kept smooth and consistent. When all the trimming work is completed, the bone tissue between each depth-fixing hole is further polished to ensure the smoothness and trimming requirements of the entire bone surface.

[0031] Compared with the traditional trimming guide, the present invention not only reduces the number of trimming guides used, but also avoids the problem of prolonged operation time caused by repeated navigation during the operation. Through the trimming method of connecting points as lines and using equal depth points and contour lines to guide, a fast and accurate bone trimming effect is achieved.

[0032] The above description shows and describes a preferred embodiment of the present invention, but it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention, through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A digital guide plate for fixed-depth bone trimming technology, characterized in that: It comprises a depth-determining bone trimming guide plate (1), a depth-determining guide column (4), an occlusal fixing plate (2), and a connecting rod (9) connecting the depth-determining bone trimming guide plate (1) and the occlusal fixing plate (2); The occlusal fixation plate (2) is accurately prepared by 3D printing according to the three-dimensional shape of the patient's teeth, and a plurality of grooves (8) are arranged on the occlusal fixation plate (2), and the grooves (8) match the shape of the patient's teeth; At least four guide grooves (3) are arranged on the depth-determining bone trimming guide plate (1), and depth-determining guide columns (4) matching the guide grooves (3) are movably arranged in the guide grooves (3), and each depth-determining guide column (4) is provided with a specific bone trimming depth mark (5); at least two titanium nail holes (6) are arranged on the depth-determining bone trimming guide plate (1), and titanium nails (7) are movably arranged in the titanium nail holes (6).

2. The digital guide plate for the deep bone trimming technique according to claim 1, characterized in that: The edges of the depth-determining bone trimming guide plate (1) and the occlusal fixing plate (2) are arc-shaped.

3. The digital guide plate for the deep bone trimming technique according to claim 1, characterized in that: The diameter of the guide groove (3) is 2 mm, and the distance between two adjacent guide grooves (3) is 5 mm-10 mm.

4. The digital guide plate for the deep bone trimming technique according to claim 1, characterized in that: The shape of the fixed-depth bone trimming guide plate (1) is precisely prepared by 3D printing according to the abnormal bone shape and size of the patient.

5. The digital guide plate for the deep bone trimming technique according to claim 1, characterized in that: The depth-determining bone trimming guide plate (1) is specifically a photosensitive resin depth-determining bone trimming guide plate, and the depth-determining guide column (4) is specifically a photosensitive resin depth-determining guide column.

6. The digital guide plate for the deep bone trimming technique according to claim 5, characterized in that: The depth mark (5) on the depth-fixing guide column (4) comprises a plurality of scale bars, and the interval between two adjacent scale bars is 1 mm.

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