Brash wing process separation operation system
By using positioning devices and limiting mechanisms in sphenoid pterygoid transection surgery, the problems of inaccurate bone chisel positioning and difficulty in controlling displacement depth were solved, thus improving the precision and safety of the surgery.
Patent Information
- Application Number
- CN202511827030.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-01-09
AI Technical Summary
In existing techniques, the positioning of the chisel in sphenoid pterygoid transection surgery is not precise, making it difficult to adapt to different patients, and the depth of chisel displacement is difficult to control, posing a risk of injury.
The design employs a positioning element with a mating surface, guide channel, and limiting mechanism that match the anatomical shape of the outer surface of the cheekbone. Combined with limiting blocks and knob adjustments, it ensures accurate positioning and displacement control of the bone chisel.
This technique achieves stable fit between the bone chisel and different patients during pterygotomy, avoiding damage from excessive bone chisel insertion and improving surgical precision and safety.
Smart Images
Figure CN121287233A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically to a surgical system for pterygoid process transection of the sphenoid bone. Background Technology
[0002] Sphenoid pterygoid process transection is a crucial step in oral and maxillofacial surgery, widely used in procedures involving oral cancer and other lesions affecting the pterygoid process, or lesions that have destroyed the posterolateral wall of the maxillary sinus and invaded the infratemporal fossa, requiring resection of the pterygoid process. Because the pterygoid process is located in the deep lateral region of the skull base, with superficial anatomical structures such as the medial and lateral pterygoid muscles, pterygoid venous plexus, and maxillary artery, it is difficult for surgeons to transection the pterygoid process under direct vision during surgery. The general procedure is as follows: The surgeon makes a lateral facial incision, dissects the soft tissue, and exposes the approximate area of the zygomatic bone, zygomatic arch, and pterygoid process to be operated on. Then, relying on anatomical memory and visual observation of anatomical landmarks, the surgeon mentally estimates the entry point, angle, and depth of the chisel. Holding the chisel, the surgeon, based on experience, places it at the estimated entry point and then uses a surgical hammer to tap, transectioning the pterygoid process by feel.
[0003] This procedure has the following drawbacks. First, the angle, position, and distance of the bone chisel entry depend on preoperative CT analysis of the patient and the surgeon's experience during the actual operation. In current techniques, bone chisel positioning is mostly achieved using guides fixed inside the patient's mouth, such as those clamping the alveolar bone or mandible. This positioning is not precise enough and is difficult to adapt to different patients. Second, during the insertion process, the bone chisel may slide or rotate due to the surgeon's insertion and tapping, causing deviation from the cutting path and increasing the risk of accidental injury. Finally, the depth of bone chisel entry is difficult to control. If the displacement is too shallow, the transection will not be complete, requiring repeated operations and increasing trauma. If the displacement is too deep, it may damage the nerves and blood vessels in the pterygopalatine fossa on the medial side of the pterygoid process, or even injure the skull base, posing a high risk.
[0004] Based on this, this application provides a surgical system for sphenoid pterygoid process separation, aiming to solve at least one of the aforementioned problems. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides a sphenoid pterygoid process transection surgical system, which solves the problems of the difficulty in adapting the bone chisel positioning structure to different patients and the difficulty in controlling the bone chisel displacement depth in sphenoid pterygoid process transection surgery.
[0006] To achieve the above objectives, the present invention provides the following technical solution: This application provides a surgical system for pterygoid process transection of the sphenoid bone, comprising: Bone chisel 1, bone chisel 1 is suitable for severing the pterygoid process of the sphenoid bone; The positioning system is suitable for determining the direction and position of displacement of the bone chisel 1. The positioning system includes: Positioning component 21, with a mating surface 22 on one side that matches the anatomical shape of the outer surface of the zygomatic arch, and a guide channel 23 adapted to the bone chisel 1 on the positioning component 21. Fixed structure, the fixed structure is suitable for fixing positioning parts 21; In addition, it also includes: Limiting mechanism 3 is used to limit the displacement distance of bone chisel 1.
[0007] In a preferred embodiment, the limiting mechanism 3 includes: Limiting block 31 is set on positioning component 21, and a guide channel 23 is opened in the center of limiting block 31; Slider 32 is slidably connected to bone chisel 1; Knob 33 is connected to slider 32 by a screw thread. One end of the screw of knob 33 passes through slider 32 and extends to the outer surface of bone chisel 1.
[0008] In a more preferred embodiment, the inner surface of the guide channel 23 is provided with a protrusion 231, and the outer surface of the bone chisel 1 is provided with a groove 11 that matches the protrusion 231.
[0009] In one embodiment, the fixing structure includes: At least two fixing pins 24 are used to fix the positioning element 21 to the cheekbone or zygomatic arch.
[0010] In a preferred embodiment, it further includes: The flushing channel 25 is located on the positioning element 21.
[0011] In one embodiment, the outer surface of the bone chisel 1 is provided with scale markings.
[0012] In a preferred embodiment, the outer surface of the bone chisel 1 is provided with anti-slip texture.
[0013] In a more preferred embodiment, the proximal end of the bone chisel 1 is provided with an impact end 12.
[0014] In one embodiment, the mating surface 22 is formed by 3D printing based on zygomatic bone and zygomatic arch CT data.
[0015] In a preferred embodiment, the positioning element 21 is made of transparent acrylic resin.
[0016] This invention provides a surgical system for pterygoid process transection of the sphenoid bone. Compared with the prior art, it has the following advantages: This application, by setting a positioning component, a mating surface that matches the anatomical shape of the outer surface of the zygomatic bone, a guide channel, and a limiting mechanism, enables the positioning component to form a stable fit with the zygomatic bone surface of different patients, adapting to the bone characteristics of different patients to position the bone chisel. The guide channel can control the direction of the bone chisel toward the pterygoid process of the sphenoid bone, and the limiting mechanism can limit the displacement depth of the bone chisel, avoiding the bone chisel from being inserted too deeply and damaging the patient when the pterygoid process of the sphenoid bone is severed. 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 description of the embodiments or the prior art 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 application provides a three-dimensional schematic diagram of a sphenoid pterygoid transection surgical system.
[0019] Figure 2 This is a frontal perspective three-dimensional schematic diagram of the positioning component and limiting block provided in the embodiments of this application.
[0020] Figure 3 This is a bottom-view perspective view of the positioning component provided in an embodiment of this application.
[0021] Figure 4 A three-dimensional schematic diagram of a bone chisel provided for an embodiment of this application.
[0022] Figure 5 This is a three-dimensional schematic diagram of the slider and knob structure provided in the embodiments of this application.
[0023] In the diagram: 1. Bone chisel; 3. Limiting mechanism; 11. Groove; 12. Impact end; 21. Positioning element; 22. Mating surface; 23. Guide channel; 24. Fixing pin; 25. Flushing channel; 31. Limiting block; 32. Slider; 33. Knob; 231. Protrusion. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] This application provides a sphenoid pterygoid transection surgical system, which solves the problems of the difficulty in adapting the bone chisel positioning structure to different patients and the difficulty in controlling the bone chisel displacement depth in sphenoid pterygoid transection surgery.
[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0027] Example 1: See Figures 1-5 As shown in the embodiment of this application, a sphenoid pterygoid process transection surgical system includes: a bone chisel 1, which is suitable for transection of the sphenoid pterygoid process; a positioning system, which is suitable for positioning the displacement direction and position of the bone chisel 1, and includes: a positioning element 21, one side of which has a mating surface 22 that matches the anatomical shape of the outer surface of the zygomatic bone, and a guide channel 23 adapted to the bone chisel 1 is provided on the positioning element 21; a fixing structure, which is suitable for fixing the positioning element 21; and further includes: a limiting mechanism 3, which is suitable for limiting the displacement distance of the bone chisel 1.
[0028] In this embodiment, it should be noted that one side of the positioning component 21 is provided with a mating surface 22 that matches the anatomical shape of the outer surface of the zygomatic bone and zygomatic arch. The mating surface 22 can be formed by additive manufacturing or other methods using CT scan data of the patient's zygomatic bone and zygomatic arch. During surgery, after the surgeon exposes the surgical field, the surgeon fits the patient's zygomatic bone with the mating surface 22 and fixes the positioning component 21 using a fixing structure. This establishes a stable positioning of the bone chisel 1 that matches the zygomatic bone characteristics of different patients. The guide channel 23 can guide the direction of bone chisel displacement, and the position and orientation of the guide channel 23 can also be determined according to the position of the patient's zygomatic bone, zygomatic arch, and pterygoid process.
[0029] The limiting mechanism 3 is mainly used to limit the displacement distance of the bone chisel 1, so as to prevent the bone chisel 1 from being inserted too deeply, causing damage to the deeper tissues of the pterygoid process of the sphenoid bone.
[0030] In a preferred embodiment, the limiting mechanism 3 includes: a limiting block 31, which is disposed on the positioning member 21, and a guide channel 23 is formed in the center of the limiting block 31; a slider 32, which is slidably connected to the bone chisel 1; and a knob 33, which is threadedly connected to the slider 32 by a screw, with one end of the screw of the knob 33 passing through the slider 32 and extending to the outer surface of the bone chisel 1.
[0031] In this embodiment, it should be noted that, see Figure 1 , Figure 4 and Figure 5As shown, slider 32 is slidably connected to the outer surface of bone chisel 1. Knob 33 is threadedly connected to slider 32 via a screw. One end of the screw of knob 33 passes through slider 32 and extends to the outer surface of bone chisel 1. By rotating knob 33, the screw of knob 33 can be tightened or loosened against the outer surface of bone chisel 1, thereby allowing slider 32 to clamp or loosen bone chisel 1, thus adjusting the position of slider 32 on the surface of bone chisel 1. After slider 32 clamps and fixes bone chisel 1, when bone chisel 1 moves along guide channel 23, slider 32 is blocked by limiting block 31, thus controlling the displacement depth of bone chisel 1. It is conceivable that the specific displacement distance of bone chisel 1 during surgery can be determined based on CT data of the patient's head.
[0032] In a more preferred embodiment, the inner surface of the guide channel 23 is provided with a protrusion 231, and the outer surface of the bone chisel 1 is provided with a groove 11 that matches the protrusion 231.
[0033] In this embodiment, it should be noted that, see Figures 3-4 The engagement of the protrusion 231 and the groove 11 prevents the bone chisel 1 from shaking and damaging surrounding tissues when it moves along the guide channel 23.
[0034] In addition, unlike this embodiment, the protrusion can also be provided on the outer surface of the bone chisel 1, and a groove matching the protrusion is opened in the guide channel 23. The purpose is also to prevent the bone chisel 1 from shaking when it moves along the guide channel 23 and damaging the surrounding tissue.
[0035] Example 2: See Figures 1-5 As shown in the embodiment of this application, a surgical system for pterygoid process transection of the sphenoid bone is provided, including all the contents of Embodiment 1 and its preferred embodiments. In addition, the fixation structure includes at least two fixation nails 24, which are suitable for fixing the positioning member 21 to the zygomatic bone or zygomatic arch.
[0036] In this embodiment, it should be noted that the fixation nail 24 can be made of titanium alloy, which has good strength and biocompatibility. By driving the fixation nail 24 into the zygomatic bone or zygomatic arch, the positioning component 21 can be firmly fixed, avoiding shaking and damage to surrounding tissues when the bone chisel 1 is used to detach the pterygoid process of the sphenoid bone.
[0037] In a preferred embodiment, it further includes a flushing channel 25, which is formed on the positioning member 21.
[0038] In this embodiment, it should be noted that, see Figure 2 , Figure 3As shown, the irrigation channel 25 can be connected to a hose by medical staff during surgery to rinse with saline solution or similar fluids to remove bone fragments and tissue generated during the detachment, facilitating surgical procedures and subsequent wound management. The specific location and orientation of the irrigation channel 25 can be determined simultaneously when fabricating the positioning component 21, based on the patient's CT scan data of the cheekbone.
[0039] Example 3: See Figures 1-5 As shown, the sphenoid pterygoid process transection surgical system provided in this application includes all the contents of Embodiments 1 to 2 and their preferred embodiments. In addition, the outer surface of the bone chisel 1 is provided with scale markings.
[0040] In this embodiment, it should be noted that, see Figure 4 As shown, the scale markings allow medical staff to accurately control the position of the slider 32 on the bone chisel 1, thereby accurately and intuitively obtaining the depth of the bone chisel 1's displacement and preventing the bone chisel 1 from going too deep.
[0041] In a preferred embodiment, the outer surface of the bone chisel 1 is provided with anti-slip texture.
[0042] In this embodiment, it should be noted that the anti-slip texture on the outer surface of the bone chisel 1 can be added by means of carving, etching, etc. The anti-slip texture can make it easier for medical staff to hold the bone chisel 1 and prevent it from slipping.
[0043] In a more preferred embodiment, the proximal end of the bone chisel 1 is provided with an impact end 12.
[0044] In this embodiment, it should be noted that, see Figure 1 , Figure 4 As shown, the impact end 12 can be an end with a larger contact area added to the end of the bone chisel 1. When performing pterygoid process detachment, medical staff may need to use hammering or other methods to drive the bone chisel 1 to detach the pterygoid process. Setting the impact end 12 can reduce the impact pressure on the bone chisel 1 during hammering, extend the service life of the bone chisel 1, and also make it easier for medical staff to hammer the bone chisel 1, avoiding accidents such as hammering deviation.
[0045] Example 4: See Figures 1-5 As shown, the sphenoid pterygoid process separation surgical system provided in this application includes all the contents of Embodiments 1 to 3 and their preferred embodiments. In addition, the joint surface 22 is formed by 3D printing based on zygomatic bone and zygomatic arch CT data.
[0046] In this embodiment, it should be noted that 3D printing, as a type of additive manufacturing, can be customized to suit the bone characteristics of different patients, thereby achieving adaptation to the shape of the patient's cheekbone, so as to improve the accuracy of the positioning of the positioning component 21 and the firmness of the fixation after fixing the positioning component 21.
[0047] In a preferred embodiment, the positioning element 21 is made of transparent acrylic resin.
[0048] In this embodiment, it should be noted that the transparent acrylic resin possesses excellent biocompatibility and mechanical properties, which can prevent the guide channel 23 from deforming under stress during the operation of the bone chisel 1, thus avoiding guide failure. Furthermore, the transparent positioning element 21 allows the surgeon to directly observe the tightness of the fit between the positioning element 21 and the zygomatic bone surface during fixing the positioning element 21 and pushing the bone chisel 1 in, and to verify the entry position of the bone chisel 1, thereby improving the accuracy and safety of the surgery.
[0049] In summary, compared with existing technologies, it has the following beneficial effects: 1. This application, by setting a positioning component, a mating surface that matches the anatomical shape of the outer surface of the zygomatic bone and zygomatic arch, a guide channel, and a limiting mechanism, enables the positioning component to form a stable fit with the zygomatic bone surface of different patients, adapting to the bone characteristics of different patients to position the bone chisel. The guide channel can control the direction of the bone chisel toward the pterygoid process of the sphenoid bone, and the limiting mechanism can limit the displacement depth of the bone chisel, avoiding the bone chisel from being inserted too deeply and damaging the patient when the pterygoid process of the sphenoid bone is severed.
[0050] 2. This application, by setting a limiting mechanism in conjunction with the scale markings on the surface of the bone chisel, can adjust and determine the travel distance required for the bone chisel to perform pterygotomy of the sphenoid bone based on preoperative CT data. This adapts to different patients and helps reduce the risk of damaging deep important tissues due to excessive insertion of the bone chisel.
[0051] 3. This application improves the convenience of surgery and facilitates subsequent wound treatment by setting anti-slip textures on the outer surface of the bone chisel, an impact end, and a flushing channel integrated inside the positioning component. The flushing channel can be used for flushing during the operation, and the anti-slip textures and impact end facilitate the grip and hammering of the bone chisel by medical staff during the operation.
[0052] 4. By setting a positioning component made of transparent acrylic resin, this application allows medical staff to observe the fit between the positioning component and the bone surface when fixing the component, and to determine its entry position when initially advancing the bone chisel, thereby enhancing the intuitiveness, accuracy and safety of the surgical operation.
[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A surgical system for sphenoid pterygoid process transection, characterized in that, include: Bone chisel (1), said bone chisel (1) is suitable for severing the pterygoid process of the sphenoid bone; A positioning system, the positioning system being adapted to locate the displacement direction and position of the bone chisel (1), the positioning system comprising: Positioning component (21), one side of which is provided with a mating surface (22) that matches the anatomical shape of the outer surface of the zygomatic arch, and a guide channel (23) adapted to the bone chisel (1) is provided on the positioning component (21). A fixing structure, wherein the fixing structure is adapted to fix the positioning element (21). In addition, it also includes: The limiting mechanism (3) is used to limit the displacement distance of the bone chisel (1).
2. The sphenoid pterygoid process transection surgical system as described in claim 1, characterized in that, The limiting mechanism (3) includes: A limiting block (31) is provided on the positioning member (21), and the guide channel (23) is opened in the center of the limiting block (31). The slider (32) is slidably connected to the bone chisel (1); A knob (33) is connected to the slider (32) by a screw thread. One end of the screw of the knob (33) passes through the slider (32) and extends to the outer surface of the bone chisel (1).
3. The sphenoid pterygoid process transection surgical system as described in claim 1, characterized in that, The inner surface of the guide channel (23) is provided with a protrusion (231), and the outer surface of the bone chisel (1) is provided with a groove (11) that matches the protrusion (231).
4. The sphenoid pterygoid process transection surgical system as described in claim 1, characterized in that, The fixing structure includes: At least two fixing pins (24) are used to fix the positioning element (21) to the cheekbone or zygomatic arch.
5. The sphenoid pterygoid process transection surgical system as described in claim 1, characterized in that, Also includes: A flushing channel (25) is provided on the positioning element (21).
6. The sphenoid pterygoid process transection surgical system as described in any one of claims 1 to 5, characterized in that, The outer surface of the bone chisel (1) is marked with graduations.
7. The sphenoid pterygoid process transection surgical system as described in any one of claims 1 to 5, characterized in that, The outer surface of the bone chisel (1) is provided with anti-slip texture.
8. The sphenoid pterygoid process transection surgical system as described in any one of claims 1 to 5, characterized in that, The bone chisel (1) has an impact end (12) at its proximal end.
9. The sphenoid pterygoid process transection surgical system as described in any one of claims 1 to 5, characterized in that, The bonding surface (22) is formed by 3D printing based on CT data of the zygomatic bone and zygomatic arch.
10. The sphenoid pterygoid process transection surgical system as described in any one of claims 1 to 5, characterized in that, The positioning element (21) is made of transparent acrylic resin.