Minimally invasive guide system for maxillary sinus floor augmentation and simultaneous implantation

Abstract

The application belongs to the technical field of medical devices, and particularly relates to a minimally invasive guide plate system for maxillary sinus external lifting and simultaneous implanting, which comprises a main body and an ultrasonic bone knife working tip, a connecting rod is fixedly connected to the top of the main body, a windowing guide unit is fixedly connected to the top of the connecting rod, an implant guide unit is arranged at the bottom of the main body, the implant guide unit is located at the bottom of the windowing guide unit, the windowing guide unit comprises a windowing guide plate, and a plurality of guide grooves are formed in the side wall of the windowing guide plate. The application has the beneficial effects that the windowing path can be accurately guided by the windowing guide unit and the ultrasonic bone knife working tip, the windowing depth of the ultrasonic bone knife working tip can be limited, the operation difficulty is effectively reduced, the risk of sinus mucosa perforation caused by excessively deep windowing is avoided, precise minimally invasive windowing can be realized, and surgical trauma and postoperative reactions are reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically a minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation. Background Technology

[0002] Maxillary sinus floor elevation (external elevation) is a core technique for addressing insufficient bone volume in the maxillary posterior region. Traditional surgery heavily relies on the surgeon's experience, requiring them to construct a three-dimensional image in their mind using CT images. During the procedure, with limited visibility, they must determine the location and extent of the fenestration to avoid damaging the sinus mucosa and important blood vessels (such as the anterior alveolar artery). The entire process involves a degree of blindness, easily leading to complications such as sinus mucosal perforation and poor fenestration placement resulting in unsatisfactory implant placement. Therefore, guidance is needed when creating the fenestration site.

[0003] For example, CN119454263A discloses a precise external fenestration maxillary sinus lift implant composite guide plate and its manufacturing method, using pure titanium as the material. It includes: a tooth-supported full-range implant guide device, a connecting rod, and a maxillary sinus lateral wall fenestration guide device. The tooth-supported full-range implant guide device is used to fix the composite guide plate and guide the position of the implant socket and implant. The maxillary sinus lateral wall fenestration guide device is used to locate and determine the depth of the intended fenestration site in the maxillary sinus. The connecting rod connects the tooth-supported full-range implant guide device and the maxillary sinus lateral wall fenestration guide device. The tooth-supported full-range implant guide device, the connecting rod, and the maxillary sinus lateral wall fenestration guide device are arranged sequentially from bottom to top during maxillary sinus lift implantation.

[0004] The aforementioned guide plate can guide the opening position during fenestration, but it cannot precisely guide the opening path and it is difficult to achieve depth control of the ultrasonic bone scalpel tip during fenestration. The surgeon needs to rely on touch to thin the bone wall to perform fenestration, which is very easy to cause mucosal rupture due to operational errors. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing maxillary sinus lift guides are difficult to use to accurately guide the fenestration path and control the fenestration depth.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation includes a main body and an ultrasonic bone scalpel working tip. A connecting rod is fixedly connected to the top of the main body, and a fenestration guide unit is fixedly connected to the top of the connecting rod. An implantation guide unit is provided at the bottom of the main body, located at the bottom of the fenestration guide unit. The fenestration guide unit includes a fenestration guide plate, and the side wall of the fenestration guide plate has several guide grooves. The ultrasonic bone scalpel working tip includes a mounting part, and a connecting part is fixedly connected to one end of the mounting part. A blade head is fixedly connected to the other end of the connecting part, and a limit buckle is detachably provided in the middle of the connecting part.

[0008] Furthermore, the cutter head is detachably disposed within the guide groove, and the diameter of the cutter head matches the width of the guide groove.

[0009] Furthermore, the side wall of the window opening guide unit away from the lip side is provided with a fitting part.

[0010] Furthermore, the planting guiding unit includes a lower groove, which is located at the bottom of the main body.

[0011] Furthermore, a guide tube is provided at the top of the lower slot, and a guide hole is provided inside the guide tube.

[0012] Furthermore, the cross-section of the limiting buckle is elliptical, and the minor axis length of the limiting buckle is greater than the width of the guide groove.

[0013] Furthermore, the distance between the limiting buckle and the tip of the blade is D, where D = d + k, d is the bone thickness of the anterolateral wall of the maxillary sinus, and k is the safety margin.

[0014] Furthermore, the range of k is from 1 mm to 3 mm.

[0015] Furthermore, the main body includes an interlocking portion.

[0016] Furthermore, the top of the biting part is provided with a biting groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The present invention provides a minimally invasive guide plate system for maxillary sinus external elevation and simultaneous implantation. By setting a fenestration guide unit and an ultrasonic bone scalpel working tip, it can achieve precise guidance of the fenestration path and limit the fenestration depth of the ultrasonic bone scalpel working tip, effectively reducing the difficulty of operation and avoiding the risk of sinus mucosal perforation caused by excessive fenestration; at the same time, it can achieve precise minimally invasive fenestration, reducing surgical trauma and postoperative reaction.

[0019] 2. The present invention provides a minimally invasive guide plate system for maxillary sinus external elevation and simultaneous implantation. By setting an implantation guidance unit, it can achieve dual synchronous guidance of the fenestration position and the implantation position, ensuring that the implantation position matches the maxillary sinus elevation position. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall assembly structure of a minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to the present invention.

[0021] Figure 2 This is a schematic diagram of the top view of a minimally invasive guide plate system for maxillary sinus external elevation and simultaneous implantation according to the present invention.

[0022] Figure 3 This is a side view schematic diagram of a minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to the present invention.

[0023] Figure 4 This is a schematic diagram of the occlusal structure of a minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to the present invention.

[0024] Figure 5 This is a schematic diagram of the occlusal groove structure of a minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to the present invention.

[0025] Figure 6 This is a schematic diagram of the ultrasonic bone scalpel working tip structure of a minimally invasive guide plate system for maxillary sinus external elevation and simultaneous implantation according to the present invention.

[0026] In the diagram: 1. Main body; 101. Occlusal part; 102. Occlusal groove; 2. Implantation guiding unit; 201. Lower groove; 202. Guide tube; 203. Guide hole; 3. Connecting rod; 4. Window opening guiding unit; 401. Window opening guide plate; 402. Guide groove; 403. Fitting part; 5. Ultrasonic bone scalpel working tip; 501. Mounting part; 502. Connecting part; 503. Blade head; 504. Limiting buckle. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0028] Please see Figures 1-6The minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation in this embodiment includes a main body 1 and an ultrasonic bone scalpel working tip 5. A connecting rod 3 is fixedly connected to the top of the main body 1, and a fenestration guide unit 4 is fixedly connected to the top of the connecting rod 3. An implantation guide unit 2 is provided at the bottom of the main body 1, and the implantation guide unit 2 is located at the bottom of the fenestration guide unit 4. The fenestration guide unit 4 includes a fenestration guide plate 401, and a plurality of guide grooves 402 are provided on the side wall of the fenestration guide plate 401. The ultrasonic bone scalpel working tip 5 includes a mounting part 501, and a connecting part 502 is fixedly connected to the end of the mounting part 501. A blade head 503 is fixedly connected to the other end of the connecting part 502. A limit buckle 504 is detachably provided in the middle of the connecting part 502. The blade head 503 is detachably disposed in the guide groove 402, and the diameter of the blade head 503 matches the width of the guide groove 402. During the surgery, the main body 1 is placed in the patient's mouth, with the implantation guidance unit 2 positioned at the bottom of the implantation site. At this time, the fenestration guide plate 401 is located outside the fenestration site, and the outline of the guide groove 402 forms the fenestration trajectory. Then, the ultrasonic bone scalpel working tip 5 is mounted on the ultrasonic bone scalpel handle via the mounting part 501. The handle drives the scalpel head 503 to begin high-frequency ultrasonic vibration. The scalpel head 503 is then inserted along the guide groove 402 to perform the fenestration. The guide groove 402 guides the movement trajectory of the scalpel head 503, thus achieving precise guidance of the fenestration trajectory. Simultaneously, during the fenestration process, when the scalpel head 503... When the tip is about to contact or just touches the sinus mucosa, the limiting buckle 504 will contact the upper surface of the fenestration guide plate 401, forming a mechanical hard barrier, physically preventing the blade 503 from moving deeper, thereby ensuring the integrity of the patient's sinus mucosa and avoiding damage to the patient; after the fenestration is completed, the sinus mucosa at the top of the patient's implantation site is lifted through the fenestration position, and then the filling material is injected. After the filling material solidifies, the implant is guided and implanted through the implantation guidance unit 2; through the above steps, dual synchronous guidance of the fenestration position and the implantation position can be achieved, ensuring that the implantation position of the implant matches the maxillary sinus elevation position.

[0029] The fenestration guide unit 4 has a fitting part 403 on the side wall away from the lip. By providing the fitting part 403, the fenestration guide plate 401 can fit more closely to the patient's oral cavity wall, thereby ensuring the accuracy of the fenestration trajectory.

[0030] The implantation guidance unit 2 includes a lower slot 201, which is located at the bottom of the main body 1. A guide tube 202 is provided at the top of the lower slot 201, and a guide hole 203 is provided inside the guide tube 202. During implantation, the implant is inserted into the patient's maxilla along the guide hole 203 in the middle of the guide tube 202. The guide tube 202 can guide the implantation, reducing the difficulty of the surgical operation for medical staff.

[0031] The limiting buckle 504 has an elliptical cross-section, and its minor axis is longer than the width of the guide groove 402. The limiting buckle 504 can limit the fenestration depth of the blade 503, and its position can be adjusted according to the bone thickness at the fenestration site of different patients, thus improving its applicability.

[0032] The distance between the limiting buckle 504 and the end of the blade 503 is D, where D = d + k, d is the bone thickness of the anterolateral wall of the maxillary sinus, and k is the safety margin; the value of k is 1.5 mm. By setting a safety margin, the safety during surgery can be improved, and damage to the sinus mucosa of the patient can be avoided when opening the window.

[0033] The main body 1 includes an occlusal portion 101, and an occlusal groove 102 is provided at the top of the occlusal portion 101. By providing the occlusal groove 102, the occlusal portion 101 can fit closely with the patient's maxilla, further improving the accuracy of opening the window and implantation.

[0034] A method for designing and manufacturing a minimally invasive guide plate for maxillary sinus lift and simultaneous implantation, comprising the following steps:

[0035] S1. Obtain the patient's jawbone CT image data and intraoral scan data;

[0036] S2. Perform three-dimensional reconstruction and registration fusion of CT data and intraoral scan data to generate a comprehensive three-dimensional model including the maxillary sinus cavity, bone wall and dentition.

[0037] S3. Plan the ideal implant placement location and path on the comprehensive three-dimensional model, and plan the location, shape and size of the window on the anterolateral wall of the maxillary sinus;

[0038] S4. Measure the thickness d of the bone wall at the planned window location;

[0039] S5. Design a digital model of a minimally invasive surgical guide. The minimally invasive model includes a main body 1 that conforms to the dentition and mucosa, a window opening guide unit 4 that corresponds to the planned window opening position and shape, and an implantation guide unit 2 that corresponds to the planned implantation path.

[0040] S6. Determine the installation distance D of the limiting buckle 504 for the working tip of the ultrasonic bone scalpel based on the bone wall thickness d and the safety margin k.

[0041] S7. The main body 1 is manufactured using additive manufacturing technology, and the window opening guide unit 4 and the planting guide unit 2 are fixed to the corresponding parts of the main body 1.

[0042] S8. Manufacturing or selecting a limiting buckle 5 for the ultrasonic bone scalpel working tip 5 located at position D.

[0043] By following the steps described above to fabricate the minimally invasive surgical guide, the difficulty of its fabrication can be effectively reduced. Real-time modeling based on the patient's oral cavity data can improve the accuracy of fenestration and implantation, effectively reducing the difficulty of the surgery while greatly improving its safety.

[0044] Working principle: During surgery, the main body 1 is worn in the patient's mouth, with the implantation guidance unit 2 positioned at the bottom of the implantation site. At this time, the fenestration guide plate 401 is located outside the fenestration site, and the outline of the guide groove 402 forms the fenestration trajectory. Then, the ultrasonic bone scalpel working tip 5 is mounted on the ultrasonic bone scalpel handle via the mounting part 501. The handle drives the scalpel head 503 to begin high-frequency ultrasonic vibration. The scalpel head 503 is then inserted along the guide groove 402 to perform the fenestration. The guide groove 402 guides the movement trajectory of the scalpel head 503, thus achieving precise guidance of the fenestration trajectory. Simultaneously, during the fenestration process, when the tip of the scalpel head 503 is about to contact or just touches the sinus mucosa, the limiting buckle 504 engages with the fenestration guide plate 401. The upper surface of the blade 503 contacts the sinus mucosa, forming a mechanical barrier that physically prevents the blade from moving deeper, thus ensuring the integrity of the sinus mucosa and avoiding damage to the patient. After the fenestration is completed, the sinus mucosa at the top of the implantation site is lifted through the fenestration position, and then the filler is injected. After the filler solidifies, the implant is guided for implantation through the implantation guidance unit 2. During implantation, the implant is inserted into the patient's maxilla through the guide hole 203 in the middle of the guide tube 202. The guide tube 202 can guide the implantation, reducing the difficulty of the operation for medical staff. Through the above steps, dual synchronous guidance of the fenestration position and the implantation position can be achieved, ensuring that the implantation position matches the maxillary sinus elevation position.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation, characterized in that: The device includes a main body (1) and an ultrasonic bone scalpel working tip (5). A connecting rod (3) is fixedly connected to the top of the main body (1). A window opening guide unit (4) is fixedly connected to the top of the connecting rod (3). An implantation guide unit (2) is provided at the bottom of the main body (1). The implantation guide unit (2) is located at the bottom of the window opening guide unit (4). The window opening guide unit (4) includes a window opening guide plate (401). Several guide grooves (402) are provided on the side wall of the window opening guide plate (401). The ultrasonic bone scalpel working tip (5) includes an installation part (501). A connecting part (502) is fixedly connected to the end of the installation part (501). A blade head (503) is fixedly connected to the other end of the connecting part (502). A limit buckle (504) is detachably provided in the middle of the connecting part (502).

2. The minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 1, characterized in that: The cutting head (503) is detachably disposed in the guide groove (402), and the diameter of the cutting head (503) matches the width of the guide groove (402).

3. The minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 1, characterized in that: The window opening guide unit (4) has a fitting part (403) on the side wall away from the lip side.

4. The minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 1, characterized in that: The planting guidance unit (2) includes a lower slot (201), which is located at the bottom of the main body (1).

5. A minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 4, characterized in that: The top of the lower slot (201) is provided with a guide tube (202), and the inside of the guide tube (202) is provided with a guide hole (203).

6. The minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 1, characterized in that: The cross-section of the limiting buckle (504) is elliptical, and the length of the minor axis of the limiting buckle (504) is greater than the width of the guide groove (402).

7. The minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 1, characterized in that: The distance between the limiting buckle (504) and the end of the blade (503) is D, where D = d + k, d is the bone thickness of the anterolateral wall of the maxillary sinus, and k is the safety margin.

8. A minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 7, characterized in that: The range of k is from 1 mm to 3 mm.

9. A minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 1, characterized in that: The main body (1) includes an interlocking part (101).

10. A minimally invasive guide plate system for maxillary sinus external lift and simultaneous implantation according to claim 9, characterized in that: The top of the biting part (101) is provided with a biting groove (102).

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