Navigation and positioning apparatus for maxillary sinus lift surgery

Abstract

Disclosed in the present invention is a navigation and positioning apparatus for maxillary sinus lift surgery, belonging to the technical field of medical devices. The technical problems in the prior art of increased surgical difficulty and elevated surgical risk caused by invisibility during the maxillary sinus lift procedure are solved. The present invention comprises a navigation and positioning device, a connecting shaft detachably connected to the navigation and positioning device, and a stripping head detachably connected to the connecting shaft for a maxillary sinus mucosa stripping operation. The present invention combines the maxillary sinus lift instrument with the navigation and positioning device recognizable by a visual navigation instrument, such that the functions of guidance and positioning, as well as positioning of the stripping depth and range, can be effectively achieved, thereby effectively reducing the difficulty and surgical risk of maxillary sinus lift surgery. Moreover, a detachable connection mode is used both between the stripping head and the connecting shaft, and between the connecting shaft and the navigation and positioning device, such that an operator can select a suitable elevator according to the specific condition of a patient, which can increase the application range and the convenience of use of the maxillary sinus lift instrument.

Description

A navigation and positioning device for maxillary sinus lift surgery Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a navigation and positioning device for maxillary sinus lift surgery. Background Technology

[0002] When maxillary posterior teeth are lost, the remaining bone height in the maxillary posterior region decreases due to maxillary sinus pneumatization and alveolar ridge resorption. In this case, implantation may penetrate the maxillary sinus wall. To facilitate implant placement, it is often necessary to dissect and elevate the maxillary sinus membrane to a suitable height, while simultaneously transplanting a suitable amount of low-replacement-rate bone substitute into the maxillary sinus to ensure good osseointegration of the implant. This surgical procedure is called maxillary sinus lift. The maxillary sinus lift instrument used in this procedure—the dissector—is suitable for dissecting the maxillary sinus mucosa from the sinus floor bone surface and then filling it with low-replacement-rate bone substitute.

[0003] Currently, maxillary sinus lift surgery primarily relies on the surgeon's free hand, using a dissector to dissect the maxillary sinus mucosa based on experience and touch. This process depends entirely on the surgeon's tactile sense, as the depth and extent of the dissection are not visible. The surgery is highly complex and demands a high level of expertise from the surgeon, requiring extensive experience. Because the dissection is largely performed blindly, the risk of failure during maxillary sinus lift surgery is high, potentially leading to mucosal rupture or incomplete dissection.

[0004] Therefore, designing a navigation and positioning device for maxillary sinus lift surgery to reduce the difficulty of the surgery and the risk of surgical failure has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a navigation and positioning device for maxillary sinus lift surgery, so as to at least solve some of the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A navigation and positioning device for maxillary sinus lift surgery includes a navigation locator, a connecting shaft detachably connected to the navigation locator, and a dissection head detachably connected to the connecting shaft for maxillary sinus mucosal dissection.

[0008] Furthermore, the navigation locator includes a locator housing and a navigator identification layer disposed on the outer surface of the locator housing; the navigator identification layer is provided with multiple feature points that can be identified by a visual navigator.

[0009] Furthermore, the locator housing is cylindrical, and the connecting shaft is detachably connected to the navigation locator via a thread.

[0010] Furthermore, a pointing nut is installed on the connecting shaft, and a stud that matches the pointing nut is provided on the peeling head. The peeling head is detachably threaded to the pointing nut through the stud.

[0011] Furthermore, a foolproof pin is installed on the connecting shaft, and the stripping head is inserted into the foolproof pin.

[0012] Furthermore, the anti-foolproof pin is provided with a D-shaped insertion groove, and the stud is provided with a D-shaped connector that is compatible with the D-shaped insertion groove. The D-shaped connector is inserted into the D-shaped insertion groove.

[0013] Furthermore, the connecting shaft is provided with a locking bolt, and the anti-fool pin shaft is provided with a threaded hole that matches the locking bolt. The locking bolt is detachably threaded into the threaded hole.

[0014] Furthermore, the anti-foolproof pin includes a large-diameter shaft section and a small-diameter shaft section with an integral structure. A pin step is formed between the large-diameter shaft section and the small-diameter shaft section. A threaded hole is opened on the small-diameter shaft section, and the stripper head is inserted into the large-diameter shaft section.

[0015] Furthermore, the connecting shaft is a hollow shaft, and a limiting ring A that is adapted to the locking bolt is provided on the inner wall of one end. The inner diameter of the limiting ring A is larger than the outer diameter of the screw part of the locking bolt and smaller than the outer diameter of the head of the locking bolt.

[0016] The anti-fool pin is inserted into the pointing nut. The inner wall of the pointing nut is provided with a limiting ring B that matches the pin step. The inner diameter of the limiting ring B is larger than the outer diameter of the small diameter shaft section and smaller than the outer diameter of the large diameter shaft section. The large diameter shaft section is located inside the pointing nut.

[0017] The locking bolt threaded part passes through the limiting ring A and is threadedly connected to the small diameter shaft section that passes through the limiting ring B.

[0018] Furthermore, a key is provided on the minor diameter shaft section, and a clearance groove adapted to the key is provided on the limiting ring B.

[0019] The visual navigation device described in this invention is based on existing technology, such as the navigation device provided by NDI (website: https: / / www.ndigital.cn / ). This invention utilizes the well-known binocular vision principle to achieve accurate identification by recognizing differences and details in a pattern. These feature points form images under the left and right eyes of the navigation device. Feature extraction identifies the positions of the feature points on the images, and parallax is calculated through stereo matching of corresponding points, thereby completing the identification and spatial positioning of the feature points, and ultimately enabling the identification and guidance of the maxillary sinus lift device.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention features a simple structure and ease of use. It combines a maxillary sinus lift instrument with a navigation locator identified by a visual navigation system, effectively achieving guided positioning and determining the depth and extent of dissection. This significantly reduces the difficulty and surgical risks of maxillary sinus lift surgery. Furthermore, the dissection head and connecting shaft, as well as the connecting shaft and navigation locator, are detachable, allowing the surgeon to select the appropriate dissector based on the patient's specific condition. This increases the applicability and ease of use of the maxillary sinus lift instrument. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the navigation and positioning device for maxillary sinus lift surgery of the present invention.

[0023] Figure 2 is an exploded view of the navigation and positioning device for maxillary sinus lift surgery of the present invention.

[0024] Figure 3 is a schematic diagram of the peeling head structure of the present invention.

[0025] Figure 4 is a schematic diagram of the connecting shaft of the present invention.

[0026] Figure 5 is a cross-sectional view of the connecting shaft of the present invention.

[0027] Figure 6 is a schematic diagram of the pointing nut structure of the present invention.

[0028] Figure 7 is a cross-sectional view of the nut of the present invention.

[0029] Figure 8 is a schematic diagram of the anti-mistake pin structure of the present invention.

[0030] Figure 9 is a schematic diagram of the locking bolt structure of the present invention.

[0031] Figure 10 is a schematic diagram of the navigation and positioning device structure of the present invention.

[0032] Figure 11 is a cross-sectional view of the navigation locator of the present invention (the layering between the locator housing and the navigation identification layer is not shown in the figure).

[0033] Figure 12 is a schematic diagram of the anti-foolproof pin shaft of the present invention assembled inside the pointing nut.

[0034] The corresponding names of the reference numerals in the attached drawings are as follows: 1-Peeling head, 11-Stud, 12-D-shaped connector; 2-Anti-foolproof pin, 21-D-shaped connector groove, 22-Threaded hole, 23-Large diameter shaft section, 24-Small diameter shaft section, 25-Pin step, 26-Key; 3-Pointing nut, 31-Indicator icon, 32-Limit ring B, 33-Leaning slot; 4-Connecting shaft, 41-Limit ring A; 5-Locking bolt; 6-Navigation locator, 61-Locator housing, 62-Navigator identification layer, 63-Feature point. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0036] Example 1

[0037] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0038] This invention features a simple structure, a scientifically sound design, and ease of use. It combines a maxillary sinus lift instrument with a navigation locator identified by a visual navigation system, effectively achieving guided positioning and determining the depth and extent of dissection. This significantly reduces the difficulty and surgical risks of maxillary sinus lift surgery. Furthermore, the dissection head and connecting shaft, as well as the connecting shaft and navigation locator, are detachable, allowing the surgeon to select the appropriate dissector based on the patient's specific condition, thus increasing the applicability and ease of use of the maxillary sinus lift instrument.

[0039] Example 2

[0040] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0041] The navigation locator 6 includes a locator housing 61 and a navigator identification layer 62 disposed on the outer surface of the locator housing 61; the navigator identification layer 62 is provided with a plurality of feature points 63 that can be identified by a visual navigator.

[0042] Based on Embodiment 1, this Embodiment 2 provides a more preferred structure for the navigation locator 6. Specifically, the navigation locator 6 includes a locator housing 61 and a navigator identification layer 62 disposed on the outer surface of the locator housing 61; the navigator identification layer 62 is provided with a plurality of feature points 63 that can be identified by a visual navigator.

[0043] The navigation locator 6 of this invention preferably uses binocular vision for positioning, making accurate identification by recognizing differences in patterns and details. After installing the peeler working head, the entire instrument can be calibrated by combining with the calibration plate to locate the peeler head 1, providing conditions for guidance and tracking.

[0044] The feature point 63 of this invention can be a reflective ball, reflective patch or infrared light bead that can be identified by an infrared navigator, or it can be an image feature such as a feature code, circle or focal point that can be identified by a visible light navigator.

[0045] The navigation identification layer 62 of the present invention is preferably fixedly pasted on the outer surface of the locator housing 61 by means of adhesive.

[0046] This invention combines a maxillary sinus lift instrument with a navigation locator identified by a visual navigation system, which can effectively achieve guided positioning, as well as positioning of dissection depth and range, thereby effectively reducing the difficulty and surgical risks of maxillary sinus lift surgery.

[0047] Example 3

[0048] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0049] The navigation locator 6 includes a locator housing 61 and a navigator identification layer 62 disposed on the outer surface of the locator housing 61; the navigator identification layer 62 is provided with a plurality of feature points 63 that can be identified by a visual navigator.

[0050] The locator housing 61 is cylindrical, and the connecting shaft 4 is detachably connected to the navigation locator 6 via a thread.

[0051] This embodiment 3, based on embodiment 2, provides a more preferred structure for the locator housing 61. Specifically, the locator housing 61 is cylindrical, with an internal thread on the inner wall of one end, and an external thread on the connecting shaft 4 that matches the internal thread. The connecting shaft 4 is detachably connected to the navigation locator 6 via the thread. This detachable connection structure facilitates maintenance, disassembly, and replacement.

[0052] Example 4

[0053] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0054] A pointing nut 3 is mounted on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threadedly connected to the pointing nut 3 through the stud 11. An indicator icon 31 is provided on the pointing nut 3.

[0055] Based on Embodiment 1, this embodiment 4 provides a more preferred structure for the connecting shaft 4. Specifically, a pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threadedly connected to the pointing nut 3 through the stud 11.

[0056] This invention features a simple structure, a scientifically sound design, and ease of use. It combines a maxillary sinus lift instrument with a navigation locator identified by a visual navigation system, effectively achieving guided positioning and determining the depth and extent of dissection. This significantly reduces the difficulty and surgical risks of maxillary sinus lift surgery. Furthermore, the dissection head and connecting shaft, as well as the connecting shaft and navigation locator, are detachable, allowing the surgeon to select the appropriate dissector based on the patient's specific condition, thus increasing the applicability and ease of use of the maxillary sinus lift instrument.

[0057] Example 5

[0058] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0059] A pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threaded to the pointing nut 3 through the stud 11.

[0060] A foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2.

[0061] This embodiment 5, based on embodiment 4, provides a more preferred structure for the connecting shaft 4. Specifically, a foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2. By setting the foolproof pin 2, the connection of the peeling head 1 can be made more stable, making the peeling operation more accurate and convenient, and effectively preventing mistakes.

[0062] Example 6

[0063] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0064] A pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threaded to the pointing nut 3 through the stud 11.

[0065] A foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2.

[0066] The anti-foolproof pin 2 is provided with a D-shaped insertion groove 21, and the stud 11 is provided with a D-shaped connector 12 that is adapted to the D-shaped insertion groove 21. The D-shaped connector 12 is inserted into the D-shaped insertion groove 21.

[0067] Based on Example 5, this embodiment 6 provides a more preferred connection structure between the anti-misalignment pin 2 and the stripping head 1. Specifically, the anti-misalignment pin 2 is provided with a D-shaped insertion groove 21, and the stud 11 is provided with a D-shaped connector 12 that is adapted to the D-shaped insertion groove 21. The D-shaped connector 12 is inserted into the D-shaped insertion groove 21. Through the cooperation of the D-shaped insertion groove 21 and the D-shaped connector 12, the anti-misalignment effect is obvious.

[0068] Example 7

[0069] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0070] A pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threaded to the pointing nut 3 through the stud 11.

[0071] A foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2.

[0072] The connecting shaft 4 is provided with a locking bolt 5, and the anti-fool pin shaft 2 is provided with a threaded hole 22 that is compatible with the locking bolt 5. The locking bolt 5 is detachably threaded into the threaded hole 22.

[0073] Based on Example 5, this embodiment 7 provides a more preferred connection structure between the connecting shaft 4 and the anti-misalignment pin 2. Specifically, the connecting shaft 4 is provided with a locking bolt 5, and the anti-misalignment pin 2 is provided with a threaded hole 22 that matches the locking bolt 5. The locking bolt 5 is detachably threaded into the threaded hole 22. The anti-misalignment pin 2 and the connecting shaft 4 are detachably connected by the locking bolt 5, which facilitates maintenance, disassembly, and replacement.

[0074] Example 8

[0075] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0076] A pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threaded to the pointing nut 3 through the stud 11.

[0077] A foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2.

[0078] The connecting shaft 4 is provided with a locking bolt 5, and the anti-fool pin shaft 2 is provided with a threaded hole 22 that is compatible with the locking bolt 5. The locking bolt 5 is detachably threaded into the threaded hole 22.

[0079] The anti-foolproof pin 2 includes a large-diameter shaft section 23 and a small-diameter shaft section 24 with an integral structure. A pin step 25 is formed between the large-diameter shaft section 23 and the small-diameter shaft section 24. A threaded hole 22 is opened on the small-diameter shaft section 24. The stripping head 1 is inserted into the large-diameter shaft section 23. A D-shaped insertion groove 21 is opened in the large-diameter shaft section 23.

[0080] Based on Example 7, this embodiment 8 provides a more preferred structure for the anti-foolproof pin 2. Specifically, the anti-foolproof pin 2 includes a large-diameter shaft section 23 and a small-diameter shaft section 24 with an integral structure. A pin step 25 is formed between the large-diameter shaft section 23 and the small-diameter shaft section 24. A threaded hole 22 is opened on the small-diameter shaft section 24, and the peeling head 1 is inserted into the large-diameter shaft section 23.

[0081] This invention features a simple structure, a scientifically sound design, and ease of use. It combines a maxillary sinus lift instrument with a navigation locator identified by a visual navigation system, effectively achieving guided positioning and determining the depth and extent of dissection. This significantly reduces the difficulty and surgical risks of maxillary sinus lift surgery. Furthermore, the dissection head and connecting shaft, as well as the connecting shaft and navigation locator, are detachable, allowing the surgeon to select the appropriate dissector based on the patient's specific condition, thus increasing the applicability and ease of use of the maxillary sinus lift instrument.

[0082] Example 9

[0083] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0084] A pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threaded to the pointing nut 3 through the stud 11.

[0085] A foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2.

[0086] The connecting shaft 4 is provided with a locking bolt 5, and the anti-fool pin shaft 2 is provided with a threaded hole 22 that is compatible with the locking bolt 5. The locking bolt 5 is detachably threaded into the threaded hole 22.

[0087] The anti-foolproof pin 2 includes a large-diameter shaft section 23 and a small-diameter shaft section 24 with an integral structure. A pin step 25 is formed between the large-diameter shaft section 23 and the small-diameter shaft section 24. A threaded hole 22 is opened on the small-diameter shaft section 24. The stripping head 1 is inserted into the large-diameter shaft section 23.

[0088] The connecting shaft 4 is a hollow shaft, and a limiting ring A41 adapted to the locking bolt 5 is provided on the inner wall of one end. The inner diameter of the limiting ring A41 is larger than the outer diameter of the screw part of the locking bolt 5 and smaller than the outer diameter of the head of the locking bolt 5.

[0089] The anti-fool pin 2 is inserted into the pointing nut 3. The inner wall of the pointing nut 3 is provided with a limiting ring B32 that is adapted to the pin step 25. The inner diameter of the limiting ring B32 is larger than the outer diameter of the small diameter shaft section 24 and smaller than the outer diameter of the large diameter shaft section 23. The large diameter shaft section 23 is located inside the pointing nut 3.

[0090] The locking bolt 5 threaded part passes through the limiting ring A41 and is threadedly connected to the small diameter shaft section 24 that passes through the limiting ring B32.

[0091] Based on Example 8, this embodiment 9 provides a more preferred connection structure between the connecting shaft 4, the anti-fooling pin 2, and the locking bolt 5. Specifically, the connecting shaft 4 is a hollow shaft, and a limiting ring A41 adapted to the locking bolt 5 is provided on the inner wall of one end. The inner diameter of the limiting ring A41 is larger than the outer diameter of the screw portion of the locking bolt 5 and smaller than the outer diameter of the head of the locking bolt 5.

[0092] The anti-fool pin 2 is inserted into the pointing nut 3. The inner wall of the pointing nut 3 is provided with a limiting ring B32 that is adapted to the pin step 25. The inner diameter of the limiting ring B32 is larger than the outer diameter of the small diameter shaft section 24 and smaller than the outer diameter of the large diameter shaft section 23. The large diameter shaft section 23 is located inside the pointing nut 3.

[0093] The locking bolt 5 threaded part passes through the limiting ring A41 and is threadedly connected to the small diameter shaft section 24 that passes through the limiting ring B32.

[0094] This invention utilizes a unique structure consisting of a connecting shaft 4, a foolproof pin 2, and a locking bolt 5 to detachably and organically assemble the navigation locator 6 and the dissecting head 1 together. The operator can select the appropriate dissecting head based on the patient's specific condition, increasing the applicability and ease of use of the maxillary sinus lift device. It also facilitates inspection, disassembly, and replacement.

[0095] Example 10

[0096] As shown in Figures 1-12, the present invention provides a navigation and positioning device for maxillary sinus lift surgery, including a navigation locator 6, a connecting shaft 4 detachably connected to the navigation locator 6, and a dissection head 1 detachably connected to the connecting shaft 4 for maxillary sinus mucosal dissection.

[0097] A pointing nut 3 is installed on the connecting shaft 4, and a stud 11 adapted to the pointing nut 3 is provided on the peeling head 1. The peeling head 1 is detachably threaded to the pointing nut 3 through the stud 11.

[0098] A foolproof pin 2 is installed on the connecting shaft 4, and the peeling head 1 is inserted into the foolproof pin 2.

[0099] The connecting shaft 4 is provided with a locking bolt 5, and the anti-fool pin shaft 2 is provided with a threaded hole 22 that is compatible with the locking bolt 5. The locking bolt 5 is detachably threaded into the threaded hole 22.

[0100] The anti-foolproof pin 2 includes a large-diameter shaft section 23 and a small-diameter shaft section 24 with an integral structure. A pin step 25 is formed between the large-diameter shaft section 23 and the small-diameter shaft section 24. A threaded hole 22 is opened on the small-diameter shaft section 24. The stripping head 1 is inserted into the large-diameter shaft section 23.

[0101] The connecting shaft 4 is a hollow shaft, and a limiting ring A41 adapted to the locking bolt 5 is provided on the inner wall of one end. The inner diameter of the limiting ring A41 is larger than the outer diameter of the screw part of the locking bolt 5 and smaller than the outer diameter of the head of the locking bolt 5.

[0102] The anti-fool pin 2 is inserted into the pointing nut 3. The inner wall of the pointing nut 3 is provided with a limiting ring B32 that is adapted to the pin step 25. The inner diameter of the limiting ring B32 is larger than the outer diameter of the small diameter shaft section 24 and smaller than the outer diameter of the large diameter shaft section 23. The large diameter shaft section 23 is located inside the pointing nut 3.

[0103] The locking bolt 5 threaded part passes through the limiting ring A41 and is threadedly connected to the small diameter shaft section 24 that passes through the limiting ring B32.

[0104] The small diameter shaft section 24 is provided with a key 26, and the limiting ring B32 is provided with a relief groove 33 that is adapted to the key 26.

[0105] Based on Example 9, this embodiment 10 provides a more preferred connection structure between the anti-misalignment pin 2 and the pointing nut 3. Specifically, a key 26 is provided on the small-diameter shaft section 24, and a clearance groove 33 adapted to the key 26 is provided on the limiting ring B32. Through the cooperation of the key 26 and the clearance groove 33, it can be effectively ensured that the small-diameter shaft section 24 will retract into the limiting ring B32 due to misoperation during the operation, thereby effectively ensuring the smooth progress of the operation.

[0106] This invention combines the maxillary sinus lift instrument with a navigation locator identified by a visual navigation system. The maxillary sinus lift instrument has feature points 63 that can be identified by the visual navigation system. The identification method preferably uses the existing mature technology of binocular vision. Specifically, the binocular vision principle works as follows: the feature points 63 on the maxillary sinus lift instrument form images under the left and right eyes of the visual navigation system. The position of the feature points on the images is identified through feature extraction. Disparity is calculated through stereo matching of corresponding points, thereby completing the identification and spatial positioning of the feature points, and ultimately completing the identification and guiding positioning of the maxillary sinus lift instrument. The part of the maxillary sinus to be lifted is pre-designed. Through a registration step, the CT virtual coordinate system and the navigation system can be unified. Since the visual navigation system can identify the maxillary sinus lift instrument, real-time dynamic display of the maxillary sinus lift instrument and the part of the maxillary sinus to be lifted can be achieved, including the dissection depth and range positioning.

[0107] This invention features a simple structure, a scientifically sound design, and ease of use. It combines a maxillary sinus lift instrument with a navigation locator identified by a visual navigation system, effectively achieving guided positioning and determining the depth and extent of dissection. This significantly reduces the difficulty and surgical risks of maxillary sinus lift surgery. Furthermore, the dissection head and connecting shaft, as well as the connecting shaft and navigation locator, are detachable, allowing the surgeon to select the appropriate dissector based on the patient's specific condition, thus increasing the applicability and ease of use of the maxillary sinus lift instrument.

[0108] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention used to illustrate the technical solutions of the present invention, and are not intended to limit the invention, nor are they intended to limit the patent scope of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but which still solve the same technical problem as the present invention, should be included within the protection scope of the present invention; in addition, the direct or indirect application of the technical solutions of the present invention to other related technical fields are similarly included within the patent protection scope of the present invention.

Claims

1. A navigation and positioning device for maxillary sinus lift surgery, characterized in that, It includes a navigation locator (6), a connecting shaft (4) detachably connected to the navigation locator (6), and a dissection head (1) detachably connected to the connecting shaft (4) for maxillary sinus mucosal dissection.

2. The navigation and positioning device for maxillary sinus lift surgery according to claim 1, characterized in that, The navigation locator (6) includes a locator housing (61) and a navigator identification layer (62) disposed on the outer surface of the locator housing (61); the navigator identification layer (62) is provided with a plurality of feature points (63) that can be identified by a visual navigator.

3. The navigation and positioning device for maxillary sinus lift surgery according to claim 2, characterized in that, The locator housing (61) is cylindrical, and the connecting shaft (4) is detachably connected to the navigation locator (6) by a thread.

4. The navigation and positioning device for maxillary sinus lift surgery according to claim 1, characterized in that, A pointing nut (3) is installed on the connecting shaft (4), and a stud (11) adapted to the pointing nut (3) is provided on the peeling head (1). The peeling head (1) is detachably threaded to the pointing nut (3) through the stud (11).

5. A navigation and positioning device for maxillary sinus lift surgery according to claim 4, characterized in that, A foolproof pin (2) is installed on the connecting shaft (4), and the peeling head (1) is inserted into the foolproof pin (2).

6. The navigation and positioning device for maxillary sinus lift surgery according to claim 5, characterized in that, The anti-foolproof pin (2) is provided with a D-shaped insertion groove (21), and the stud (11) is provided with a D-shaped plug (12) that is compatible with the D-shaped insertion groove (21). The D-shaped plug (12) is inserted into the D-shaped insertion groove (21).

7. A navigation and positioning device for maxillary sinus lift surgery according to claim 5, characterized in that, The connecting shaft (4) is provided with a locking bolt (5), and the anti-fool pin shaft (2) is provided with a threaded hole (22) that is compatible with the locking bolt (5). The locking bolt (5) is detachably threaded into the threaded hole (22).

8. A navigation and positioning device for maxillary sinus lift surgery according to claim 7, characterized in that, The anti-fool pin (2) includes a large diameter shaft section (23) and a small diameter shaft section (24) with an integral structure. A pin step (25) is formed between the large diameter shaft section (23) and the small diameter shaft section (24). A threaded hole (22) is opened on the small diameter shaft section (24). The peeling head (1) is inserted into the large diameter shaft section (23).

9. A navigation and positioning device for maxillary sinus lift surgery according to claim 8, characterized in that, The connecting shaft (4) is a hollow shaft, and a limiting ring A (41) adapted to the locking bolt (5) is provided on the inner wall of one end. The inner diameter of the limiting ring A (41) is larger than the outer diameter of the screw part of the locking bolt (5) and smaller than the outer diameter of the head of the locking bolt (5). The anti-fool pin (2) is inserted into the pointing nut (3). The inner wall of the pointing nut (3) is provided with a limiting ring B (32) that is compatible with the pin step (25). The inner diameter of the limiting ring B (32) is larger than the outer diameter of the small diameter shaft section (24) and smaller than the outer diameter of the large diameter shaft section (23). The large diameter shaft section (23) is located inside the pointing nut (3). The locking bolt (5) threaded through the limiting ring A (41) and threadedly connected to the small diameter shaft section (24) that passes through the limiting ring B (32).

10. A navigation and positioning device for maxillary sinus lift surgery according to claim 8, characterized in that, The small diameter shaft section (24) is provided with a key (26), and the limiting ring B (32) is provided with a relief groove (33) that matches the key (26).

Images