Cheekbone and zygomatic arch fracture reduction guide plate

Abstract

The invention discloses a cheekbone and zygomatic arch fracture reduction guide plate, and relates to the technical field of cheekbone and zygomatic arch reduction, the cheekbone and zygomatic arch fracture reduction guide plate comprises a guide plate body and a fixing structure, the guide plate body is provided with an attaching inner surface matched with the anatomical form of an affected side cheekbone and zygomatic arch bone surface in a target reduction form; the fixing structure is arranged on the guide plate body and used for fixing the guide plate body to the healthy bone surface around the zygomatic arch of the diseased side cheekbone, the problems that in the prior art, operation trauma is large, accuracy is low, the reduction effect is not ideal and the like are solved, and the zygomatic arch fracture reduction fixing operation is completed accurately, safely and efficiently.

Description

Technical Field

[0001] This invention relates to the field of zygomatic bone and zygomatic arch reduction technology, and in particular to a zygomatic bone and zygomatic arch fracture reduction guide plate. Background Art

[0002] The zygomatic bone and zygomatic arch are located in the middle and lateral part of the maxillofacial region. Their prominent position makes them prone to fracture under external force, leading to various complications and severely impacting the patient's physiological function and facial aesthetics. Due to their unique anatomical structure, external forces can cause varying degrees of rotational displacement and damage to adjacent vital structures, making treatment challenging and directly affecting the patient's needs in terms of repositioning success.

[0003] Current traditional surgical procedures rely primarily on the physician's clinical experience and preoperative assessment using imaging examinations, which has several shortcomings. Intraoperatively, the reduction effect is judged by the prominence of the zygomatic arch on the healthy side or the degree of fit of the fracture ends on the affected side. However, facial edema can make the reference point on the healthy side inaccurate. In cases of combined zygomatic bone and zygomatic arch fractures, the lack of proper occlusal guidance and granulation tissue growth lead to large reduction errors, low precision, and postoperative facial asymmetry. Furthermore, the need for repeated reshaping of the internal fixation device during surgery results in poor adhesion to the fracture surface, inaccurate positioning, and difficulty in fixation, prolonging operation time, increasing errors, and postoperative CT scans often failing to achieve ideal results, and facial deformities are also easily developed. Summary of the Invention

[0004] The purpose of this invention is to provide a reduction guide plate for zygomatic bone and zygomatic arch fractures, which solves the problems of large surgical trauma, low precision, and unsatisfactory reduction effect in the prior art, and enables precise, safe, and efficient completion of zygomatic bone and zygomatic arch fracture reduction and fixation surgery.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a reduction guide plate for zygomatic bone and zygomatic arch fractures, comprising: a guide plate body and a fixation structure, wherein the guide plate body has an inner surface that is adapted to the anatomical shape of the affected zygomatic bone and zygomatic arch bone surface of the target reduction morphology; the fixation structure is disposed on the guide plate body and is used to fix the guide plate body to the healthy bone surface around the affected zygomatic bone and zygomatic arch.

[0007] Preferably, the fixation structure consists of a plurality of fixation holes penetrating the guide plate body, the fixation holes being configured to allow fixation pins to pass through and connect to the bone surface.

[0008] Preferably, the number of fixing holes is multiple, and when the number is three or more, they are arranged non-collinearly.

[0009] Preferably, the axial direction of the fixing hole is configured to be approximately the same as the normal direction of the bone surface at the required fixing position of the guide plate body.

[0010] Preferably, the inner surface of the guide plate body is determined based on a three-dimensional model generated after mirroring the morphology of the zygomatic arch on the patient's healthy side.

[0011] Preferably, the guide plate body is integrally formed from a biocompatible photosensitive resin material using an additive manufacturing process.

[0012] Preferably, the edge of the guide plate body is configured as a rounded transition structure with a radius of 0.5 mm to 1.5 mm.

[0013] Preferably, the outer surface of the guide plate body is provided with a plurality of positioning markers, which correspond to the reference coordinates in the preoperatively planned three-dimensional model.

[0014] Preferably, the guide plate body is further provided with at least one observation window, which is located at the position corresponding to the fracture line of the zygomatic bone and zygomatic arch.

[0015] The present invention achieves the following technical effects compared to the prior art:

[0016] This invention provides a reduction guide plate for zygomatic bone and zygomatic arch fractures. A fixing structure secures the guide plate to the healthy bone surface, preventing displacement during surgery. This stable fixation ensures the guide plate remains in the correct position during bone fragment reduction, indirectly guaranteeing the expected reduction and improving surgical stability and reliability. The design of the inner surface allows the guide plate to closely conform to the affected zygomatic bone and zygomatic arch surface, providing a reliable positioning benchmark for subsequent fracture reduction, ensuring accuracy, and helping surgeons more precisely restore the fracture site to the correct position. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the zygomatic bone and zygomatic arch fracture reduction guide plate provided by the present invention;

[0019] Figure 2 A schematic diagram of the zygomatic bone and zygomatic arch fracture reduction guide plate provided by the present invention during use;

[0020] In the diagram: 1. Guide plate body; 2. Fixing hole. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of this invention is to provide a reduction guide plate for zygomatic bone and zygomatic arch fractures, which solves the problems of large surgical trauma, low precision, and unsatisfactory reduction effect in the prior art, and enables precise, safe, and efficient completion of zygomatic bone and zygomatic arch fracture reduction and fixation surgery.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] This invention provides a reduction guide plate for zygomatic bone and zygomatic arch fractures, such as... Figures 1-2 As shown, the procedure includes: a guide plate body 1 and a fixation structure. The guide plate body 1 has an inner surface that conforms to the anatomical shape of the affected zygomatic bone arch surface, which is the target reduction shape. The fixation structure is disposed on the guide plate body 1 and is used to fix the guide plate body 1 to the healthy bone surface around the affected zygomatic bone arch. By fixing the guide plate body 1 to the healthy bone surface through the fixation structure, displacement of the guide plate during the operation can be prevented. Stable fixation ensures that the guide plate always maintains the correct position during bone fragment reduction, indirectly ensuring that the bone fragment is reduced as expected, improving the stability and reliability of the operation. The design of the inner surface allows the guide plate body 1 to closely conform to the affected zygomatic bone arch surface, providing a reliable positioning benchmark for subsequent fracture reduction, ensuring the accuracy of reduction, and helping the doctor to more accurately restore the fracture site to the correct position.

[0025] In a preferred embodiment, the fixation structure comprises multiple fixation holes 2 penetrating the guide plate body 1. The fixation holes 2 are configured to allow fixation pins to pass through and connect to the bone surface. This configuration of the fixation holes 2 provides a convenient way to fix the guide plate body 1 to the bone surface using fixation pins. This structure is simple and highly practical, making the fixation process of the guide plate easier to operate and ensuring the firmness of the fixation, reducing repositioning deviations caused by unstable fixation.

[0026] In a preferred embodiment, the number of fixing holes 2 is multiple, and when there are three or more, they are arranged non-collinearly. Multiple non-collinear fixing holes 2 can provide a more stable fixing effect. The non-collinear distribution can fix and constrain the guide plate body 1 from multiple directions, effectively preventing the guide plate from rotating or moving on the bone surface, enhancing the reliability of the fixation, and ensuring the accuracy of the guide plate position during the reduction process.

[0027] In a preferred embodiment, the axial direction of the fixation hole 2 is configured to be approximately the same as the normal direction of the bone surface at the desired fixation position of the guide plate body 1. The fact that the axial direction of the fixation hole 2 is approximately the same as the normal direction of the bone surface helps the fixation pin to be driven vertically into the bone surface, enabling the fixation pin to better withstand various forces from the guide plate and the reduction operation process, thereby increasing the stability of the fixation, avoiding loosening or poor fixation effect due to the fixation pin being tilted and subjected to force, and further ensuring the accuracy of the reduction.

[0028] In a preferred embodiment, the inner surface of the guide plate body 1 is determined based on a three-dimensional model generated by mirroring the morphology of the patient's healthy zygomatic bone and arch. Determining the inner surface based on this three-dimensional model allows the use of the patient's own healthy side's normal morphology as a reference. This design maximizes the restoration of the normal morphology of the affected zygomatic bone and arch, thus providing precise and reliable guidance for fracture reduction and contributing to improved accuracy and facial contour restoration.

[0029] In a preferred embodiment, the guide plate body 1 is integrally formed from a biocompatible photosensitive resin material using an additive manufacturing process. The use of a biocompatible photosensitive resin material reduces the risk of patient rejection of the implant, improving postoperative safety and recovery. The integral forming process using additive manufacturing allows for the precise fabrication of the guide plate body 1 to meet complex design requirements, ensuring dimensional accuracy and quality stability of the guide plate. This manufacturing method also reduces material waste and manufacturing steps during production.

[0030] In a preferred embodiment, the edge of the guide plate body 1 is set as a rounded transition structure with a radius of 0.5mm to 1.5mm. The rounded transition structure at the edge can prevent the sharp edge of the guide plate body 1 from damaging the surrounding tissues, play a protective role during the surgical operation, reduce accidental scratches and friction to surrounding muscles, nerves and other tissues, and improve the safety of the operation and the postoperative experience of the patient.

[0031] In a preferred embodiment, the outer surface of the guide plate body 1 is provided with a number of positioning markers. The positioning markers correspond to the reference coordinates in the preoperatively planned three-dimensional model. The correspondence between the positioning markers and the reference coordinates in the preoperatively planned three-dimensional model helps the doctor to quickly and accurately place the guide plate body 1 in the correct position during the operation. It also enables real-time comparison and confirmation of whether the bone block repositioning is consistent with the preoperative plan, thereby improving the efficiency and accuracy of the operation.

[0032] In a preferred embodiment, the guide plate body 1 is further provided with at least one observation window, which is located at the position corresponding to the fracture line of the zygomatic bone and zygomatic arch. The observation window is set at the position corresponding to the fracture line, which makes it convenient for the doctor to directly observe the reduction of the fracture site during the operation, and to promptly detect any problems that may occur during the reduction process, such as the alignment of bone fragments, the presence of gaps, etc., so as to make timely adjustments and further improve the success rate of fracture reduction.

[0033] The following is the method of using the aforementioned patented guide plate for zygomatic bone and zygomatic arch fracture reduction:

[0034] Preoperative preparation stage

[0035] Obtaining Patient Data: A comprehensive examination is conducted on the patient, including oral examination, facial physical examination, and precise imaging analysis, such as CT scans, to obtain detailed data on the patient's zygomatic bone and zygomatic arch. This data is crucial for the subsequent fabrication of the fitting guide, accurately reflecting the condition of the fracture site, such as the location, type, and severity of the fracture, as well as the condition of the surrounding bone tissue.

[0036] Virtual Modeling and Guide Plate Design: Digital virtual technology is used to model the acquired morphology of the healthy zygomatic bone and arch, and mirroring is performed to simulate the restoration of the affected side's shape. A three-dimensional model of the affected zygomatic bone and arch surface when it reaches the target reduction shape is constructed. Based on this model, the guide plate body 1 is determined to have an attachment inner surface adapted to the anatomical shape, and a complete three-dimensional model of the reduction guide plate is designed. According to this model, the overall structure of the guide plate is clarified, including the position and parameters of various components such as the fixation holes 2, positioning markers, and observation windows. During this process, it is necessary to accurately simulate the use of the guide plate in actual surgery to ensure that the guide plate can accurately match the patient's specific condition and provide reliable navigation for subsequent surgery.

[0037] Generating and verifying the guide plate model: Using professional software, the three-dimensional model of the repositioning guide plate is virtually simulated and verified to check whether the guide plate fits well with the target repositioning position, whether the position and angle of the fixing hole 2 are appropriate, whether the positioning mark points are consistent with the reference coordinates of the three-dimensional model planned before the operation, etc., and the model is continuously adjusted and optimized to improve it.

[0038] The guide plate is fabricated using a biocompatible photosensitive resin material and additive manufacturing processes (such as 3D printing). During the printing process, all parameters are strictly controlled to ensure that the guide plate's dimensional accuracy, quality, and performance meet design requirements. After printing, the guide plate undergoes quality inspection to check for defects, smooth edges, etc.

[0039] Surgical stage

[0040] Patient preparation and disinfection: After the patient is satisfactorily under general anesthesia, routine disinfection and draping are performed. A series of strict disinfection measures are taken for the oral cavity and surgical site, such as wiping the oral cavity with iodine-soaked cotton balls for a certain period of time, rinsing it with normal saline, and then disinfecting it with alcohol cotton balls. Facial areas involved in the surgery, such as the left scalp, periorbital area, and eyeballs, are disinfected with appropriate disinfectants and marked. At the same time, local infiltration anesthesia is administered.

[0041] Surgical incision and exposure of the fracture site: A unilateral coronal incision is made 3-4 cm posterior to the hairline on the forehead, extending from one side of the temporal region to the top of the head, slightly beyond the midline. The galea aponeurotica is incised, and hemostasis is achieved using scalp clips. The frontoparietal flap is flipped under the galea aponeurotica to 1 cm above the orbit. The periosteum is incised, and the supraorbital neurovascular bundle is carefully dissected and dissected downwards. The superficial layer of the temporalis muscle is incised, and the lateral orbital rim, zygomatic bone, and zygomatic arch are gradually dissected to fully expose the fracture ends. This procedure requires meticulous surgical technique to avoid damage to important nerves and blood vessels.

[0042] Guide plate fixation procedure: The pre-fabricated repositioning guide plate is placed around the zygomatic arch of the affected side. Fixation pins are inserted through fixation holes 2 on the guide plate and connected to the surrounding healthy bone surface, thus firmly fixing the guide plate to the bone surface. During fixation, ensure that the fixation pins are driven perpendicularly into the axial direction of fixation holes 2, roughly in the same direction as the normal direction of the bone surface at the desired fixation location. Multiple fixation pins should be fixed in different positions with non-collinear arrangements to ensure the overall stability of the guide plate on the bone surface and prevent guide plate displacement or shaking.

[0043] Fracture reduction procedure: A fixed guide plate serves as a precise benchmark and template for bone fragment reduction. Guided by the shape of the guide plate and the location of the positioning marks, the surgeon gradually moves the fracture ends to a position where they align with the inner surface of the guide plate, achieving accurate reduction of the fracture ends of the zygomatic arch, zygomatic bone, and orbital bone. During this process, the surgeon can directly observe the reduction of the fracture site through the observation window on the guide plate corresponding to the fracture line, such as whether the alignment between bone fragments is tight, whether there are gaps, and whether it is consistent with the preoperative planned model. The surgeon can then adjust the reduction procedure in real time based on the observation to ensure that the fracture ends achieve the requirements of anatomical reduction.

[0044] Subsequent surgical procedures: After the fracture is reduced, a miniature titanium plate or other fixation device is used to immobilize the fracture site. The surgical area is irrigated to remove any blood and impurities, and any bleeding that occurs during the operation is treated, such as by using hemostatic cotton. Then, a negative pressure drainage tube is placed to drain any oozing fluid. Finally, the surgical incision is sutured tightly in layers according to standard procedures, and the oral dentition and occlusion are checked for good condition.

[0045] Postoperative stage

[0046] Recovery monitoring: Closely monitor the patient's vital signs, including body temperature, blood pressure, heart rate, and respiration, to ensure a smooth postoperative recovery. Simultaneously, focus on observing the recovery of the surgical area, noting any abnormalities such as swelling, bleeding, or pain, and promptly implement appropriate treatment and nursing care measures.

[0047] Routine care: Follow standard postoperative care guidelines for oral and maxillofacial surgery. For example, instruct patients on a reasonable diet, avoiding hard or irritating foods; maintain oral hygiene and perform oral cleaning on time; change dressings for surgical incisions regularly to prevent infection.

[0048] Follow-up assessment: Patients are scheduled for regular follow-up examinations, typically using imaging techniques such as CT scans. The results are compared and analyzed with the preoperative reduction goals and the initial postoperative condition to comprehensively evaluate the effectiveness of fracture reduction. Based on the assessment results, the patient's rehabilitation plan is adjusted and optimized to promote a faster recovery.

[0049] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A reduction guide plate for zygomatic bone and zygomatic arch fractures, characterized in that: include: The guide plate body (1) has an inner surface that is adapted to the anatomical shape of the affected side zygomatic arch bone surface of the target reduction shape. as well as A fixing structure is provided on the guide plate body (1) for fixing the guide plate body (1) to the healthy bone surface around the zygomatic arch of the affected side.

2. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 1, characterized in that: The fixation structure consists of a plurality of fixation holes (2) penetrating the guide plate body (1), the fixation holes (2) being configured to allow fixation pins to pass through and connect to the bone surface.

3. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 2, characterized in that: The number of fixing holes (2) is multiple, and when there are three or more, they are arranged non-collinearly.

4. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 3, characterized in that: The axial direction of the fixing hole (2) is configured to be approximately the same as the normal direction of the bone surface at the required fixing position of the guide plate body (1).

5. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 1, characterized in that: The inner surface of the guide plate body (1) is determined based on a three-dimensional model generated after mirroring the morphology of the zygomatic arch on the healthy side of the patient.

6. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 5, characterized in that: The guide plate body (1) is integrally formed from biocompatible photosensitive resin material through additive manufacturing process.

7. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 1, characterized in that: The edge of the guide plate body (1) is set as a circular arc transition structure with a radius of 0.5 mm to 1.5 mm.

8. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 1, characterized in that: The outer surface of the guide plate body (1) is provided with a number of positioning markers, which correspond to the reference coordinates in the three-dimensional model planned before surgery.

9. The zygomatic bone and zygomatic arch fracture reduction guide plate according to claim 1, characterized in that: The guide plate body (1) is also provided with at least one observation window, which is located at the position corresponding to the fracture line of the zygomatic bone and zygomatic arch.

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