Maxillary sinus internal lifting operation sinus membrane detacher with pressure limiter
By introducing a pressure limiter into the sinusoidal dissector, the operating pressure is automatically limited, which solves the problems of sinusoidal tearing and perforation, improves surgical safety and precision, reduces reliance on surgeon experience, and enhances the repeatability and success rate of the surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI TONGJI STOMATOLOGY HOSPITAL (TONGJI UNIVERSITY AFFILIATED STOMATOLOGY HOSPITAL)
- Filing Date
- 2026-02-14
- Publication Date
- 2026-04-17
AI Technical Summary
Existing sinus strippers lack objective limitations or feedback on the operating pressure during the procedure, making it difficult for doctors to control axial pressure. This can easily lead to sinus tears or perforations, increasing surgical complications and making the procedure highly dependent on the surgeon's experience.
A sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter was designed. It has a built-in pressure spring and a limiting plate device to automatically limit the axial pressure applied by the operator. When the safety threshold is exceeded, the working end retracts to avoid damage to the sinus membrane due to excessive pressure.
It significantly reduces the risk of sinus membrane tearing or perforation, improves surgical safety and precision, shortens the learning curve, reduces complications, and increases implantation success rate.
Smart Images
Figure CN121867983A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of oral implant restoration technology, and to a sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter. Background Technology
[0002] In maxillary sinus floor elevation surgery, whether via intra-alveolar ridge elevation or lateral window elevation, the complete elevation and protection of the maxillary sinus mucosa is crucial for surgical success. After bone preparation, the surgeon needs to use a sinus membrane dissector to carefully separate and elevate the sinus floor mucosa, creating space for the implantation of bone graft material.
[0003] Existing sinus strippers are typically made of stainless steel or titanium alloy and come in various working end shapes (such as shovel-shaped, spherical, and curved) to accommodate different sinus cavity morphologies and stripping requirements. However, these strippers are all passive tools, and their operation relies entirely on the surgeon's feel and experience. If the axial pressure applied during sinus stripping is not properly controlled, the following problems can easily occur:
[0004] 1. High risk of sinus membrane tearing or perforation: Especially when the mucosa is thin, tightly adhered to the bone surface, or has irregular structures such as bone spurs or ridges, if the doctor applies too much force or in the wrong direction, it is very easy to cause the maxillary sinus mucosa to tear or perforate.
[0005] 2. Increased surgical complications: Once the sinus membrane is perforated, it will lead to serious complications such as leakage of bone graft material into the sinus cavity, postoperative infection, and maxillary sinusitis, which will affect bone healing and implant success rate.
[0006] 3. High requirements for surgeon experience: Due to the lack of objective pressure feedback or limiting mechanisms, the safe operation of existing sinus strippers is highly dependent on the surgeon's clinical experience, resulting in a long learning curve and difficulty in ensuring the stability and safety of each operation.
[0007] Therefore, developing a sinus membrane dissector for maxillary sinus lift surgery that can limit operational pressure and thus effectively protect the integrity of the sinus membrane is of great practical significance. Summary of the Invention
[0008] Due to the aforementioned deficiencies in existing technologies, this invention provides a sinus membrane dissector for maxillary sinus lift surgery that can limit operational pressure and thus effectively protect the integrity of the sinus membrane. Specifically, it is a sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter, which aims to automatically limit the axial pressure applied by the operator while ensuring effective dissection, thereby maximizing the protection of the integrity of the maxillary sinus mucosa and improving the safety of the surgery. This overcomes the problem that existing sinus membrane dissectors lack objective limitation or feedback on operational pressure during the elevation of the sinus membrane, leading to excessive force applied by the doctor and a high risk of sinus membrane tearing or perforation.
[0009] To achieve the above objectives, the present invention provides the following technical solution:
[0010] A sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter includes a handle, a main body, a connecting part, and a working end connected in sequence.
[0011] The main body and the connecting part have interconnected hollow main body parts and hollow connecting parts, and the diameter of the hollow main body parts is larger than that of the hollow connecting parts;
[0012] A pressure limiting device is provided inside the hollow part of the main body. The pressure limiting device includes a pressure spring, a lower spring limit member, a connecting rod, and a limiting plate. The lower spring limit member is fixedly installed inside the hollow part of the main body. One end of the pressure spring contacts the lower spring limit member and the pressure spring is arranged along the axial direction of the hollow part of the main body. The connecting rod is arranged inside the connecting hollow part. One end of the connecting rod is fixedly connected to the working end, and the other end extends into the hollow part of the main body and is fixedly connected to the limiting plate. The limiting plate matches the hollow part of the main body.
[0013] Handle: Used by the doctor to grip and apply force, featuring an ergonomic design for a stable grip. Main body and connecting part: These not only connect the handle to the working end but also house the pressure limiting device. The pressure limiting device, integrated within the main body and connecting part, is a built-in pressure spring. Under normal conditions, the pressure spring is compressed, meaning it has a preset safe pressure threshold. When the doctor applies axial pressure to the working end through the handle, and this pressure is less than or equal to the preset safe pressure threshold, the pressure limiting device remains stable (the pressure spring is not further compressed), and the working end performs the dissection normally. However, when the axial pressure applied by the doctor exceeds the preset safe pressure threshold, the pressure spring is compressed, causing the working end of the dissector to retract axially relative to the handle. This retraction effectively limits excessive pressure on the sinus membrane, preventing tearing or perforation of the sinus membrane due to excessive force. This achieves automatic pressure limiting, effectively protecting the integrity of the maxillary sinus mucosa and significantly improving the safety of maxillary sinus floor elevation surgery.
[0014] The sinus membrane dissector for maxillary sinus lift surgery with pressure limiter of the present invention has a reasonable and simple structural design. The presence of the pressure limiting device, i.e., the pressure limiter, gives it the ability to automatically limit the axial pressure applied by the operator, which can avoid sinus membrane tearing or perforation caused by excessive force, thereby maximizing the protection of the integrity of the maxillary sinus mucosa, improving the safety of the operation, and has great application prospects.
[0015] As a preferred technical solution:
[0016] As described above, a sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter has a handle friction-enhancing sleeve fitted on the outer wall of the handle.
[0017] As described above, a sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter has a limiting plate and limiting strip on the inner wall of the main body to limit the maximum contraction amplitude of the spring.
[0018] As described above, the maxillary sinus lift suture with pressure limiter has multiple limiting plates and strips, which are distributed circumferentially around the inner wall of the main body and arranged along the axial direction of the hollow part of the main body.
[0019] The sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter, as described above, has a main hollow part and a connecting hollow part that are both cylindrical and coaxial.
[0020] As described above, in a maxillary sinus lift procedure with a pressure limiter, the outer diameter of the limiting plate is smaller than the inner diameter of the hollow part of the main body and larger than the inner diameter of the connecting hollow part.
[0021] The sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter, as described above, has a rounded edge on the working end working surface to minimize damage to the sinus membrane.
[0022] The working end is detachably mounted on the connecting rod.
[0023] The sinus membrane dissector for maxillary sinus lift surgery with pressure limiter described above has a working end that is spherical, shovel-shaped, or curved, and can be designed into various shapes to suit different clinical needs.
[0024] As described above, the sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter has an internal thread structure on the inner wall of the hollow part of the main body, and an external thread structure matching the internal thread structure on the outer wall of the lower spring limiter. The lower spring limiter is threadedly connected to the hollow part of the main body. The trigger pressure of the pressure spring can be adjusted by adjusting the position of the lower spring limiter within the hollow part of the main body. Shortening the length of the pressure spring in the normal state increases the trigger pressure of the pressure spring, while lengthening the length of the pressure spring in the normal state decreases the trigger pressure of the pressure spring.
[0025] The above technical solution is only one feasible technical solution of the present invention. The scope of protection of the present invention is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.
[0026] Compared with the prior art, the above invention has the following advantages or beneficial effects:
[0027] (1) The sinus membrane dissector for maxillary sinus lift surgery with pressure limiter of the present invention has the ability to automatically limit the axial pressure applied by the operator. When the operating pressure exceeds the preset safety threshold, the working end of the dissector will automatically retract, instantly relieving the excessive force on the sinus membrane. This structure fundamentally solves the problem that traditional dissectors rely entirely on feel and are prone to accidentally injuring the sinus membrane due to excessive force. It significantly reduces the risk of sinus membrane tearing or perforation during surgery and eliminates the risk of sinus membrane tearing or perforation due to excessive force from the mechanism, greatly improving the safety of surgery.
[0028] (2) The sinus membrane dissector with pressure limiter of the present invention reduces the dependence of the operation on the surgeon’s experience and shortens the learning curve. Since the dissector itself has an objective pressure limiting function, it provides the doctor with a reliable “safe threshold”, which makes even doctors with relatively little experience more confident and safer to perform maxillary sinus mucosal dissection, effectively avoiding errors caused by lack of experience, thereby greatly shortening the learning curve of maxillary sinus floor elevation.
[0029] (3) The maxillary sinus lift sinus membrane dissector with pressure limiter of the present invention improves the accuracy and repeatability of the surgery. The pressure limiter ensures that the force of each dissection operation is within a safe and effective range, avoiding inconsistent operating pressure caused by individual differences of doctors, fatigue and other factors. This significantly improves the accuracy of the surgical process and the repeatability of the dissection effect, and helps to standardize the surgical procedure.
[0030] (4) The sinus membrane dissector for maxillary sinus lift surgery with pressure limiter of the present invention has a replaceable working end design (which can be quickly disassembled and replaced according to clinical needs), which can meet the needs of different sinus cavity morphology and surgical stage, and enhance clinical applicability and economy.
[0031] (5) The sinus membrane peeler for maxillary sinus lift with pressure limiter of the present invention is crucial to the success of maxillary sinus lift. By effectively protecting the sinus membrane from tearing or perforation, it can significantly reduce the occurrence of complications such as bone graft material leakage, infection, and postoperative maxillary sinusitis, thereby improving the success rate of implant restoration and the long-term prognosis of patients. It has great application prospects. Attached Figure Description
[0032] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn strictly to scale; the focus is on illustrating the gist of the invention.
[0033] Figure 1This is a schematic diagram of the sinus membrane dissector for maxillary sinus lift surgery with pressure limiter of the present invention (normal state, i.e., the force is within the allowable range).
[0034] Figure 2 This is a schematic diagram of the sinus membrane dissector for maxillary sinus lift surgery with pressure limiter of the present invention (under excessive force).
[0035] Among them, 1. Handle; 1.1 Handle friction-enhancing sleeve; 2. Main body; 2.1 Hollow part of the main body; 3. Connecting part; 3.1 Hollow connecting part; 4. Working end; 5. Pressure limiting device; 5.1 Pressure spring; 5.2 Limiting plate; 5.3 Connecting rod; 5.4 Lower limit component of spring; 5.5 Limiting strip of limiting plate. Detailed Implementation
[0036] The structure of the present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.
[0037] Example 1
[0038] A maxillary sinus lift suture dissector with pressure limiter, such as Figures 1-2 As shown, it includes a handle 1, a main body 2, a connecting part 3, and a working end 4 connected in sequence;
[0039] A handle friction enhancer sleeve 1.1 is fitted on the outer wall of the handle 1. The handle friction enhancer sleeve has anti-slip texture to provide a stable and comfortable grip and ensure that it is not easy to slip during operation;
[0040] The main body 2 and the connecting part 3 have interconnected hollow main body part 2.1 and connecting hollow part 3.1. Both the main body hollow part 2.1 and the connecting hollow part 3.1 are cylindrical structures and are coaxial. The diameter of the main body hollow part 2.1 is larger than that of the connecting hollow part 3.1.
[0041] A pressure limiting device 5 is provided inside the hollow part 2.1 of the main body. The pressure limiting device 5 includes a pressure spring 5.1, a lower spring limiter 5.4, a connecting rod 5.3, and a limiting plate 5.2. The lower spring limiter 5.4 is fixedly installed inside the hollow part 2.1 of the main body (the inner wall of the hollow part 2.1 has an internal thread structure, and the outer wall of the lower spring limiter 5.4 has an external thread structure that matches the internal thread structure. The lower spring limiter 5.4 is threadedly connected to the hollow part 2.1 of the main body). One end of the pressure spring 5.1 contacts the lower spring limiter 5.4, and the pressure spring 5.1 is arranged along the axial direction of the hollow part 2.1 of the main body. The connecting rod 5.3 is arranged inside the connecting hollow part 3.1, and one end of the connecting rod 5.3 is fixedly connected to the working end 4 (the working end...). 4 is detachably installed on the connecting rod 5.3. The connection method can be threaded connection, snap connection or quick-release connection, etc. The other end extends into the hollow part 2.1 of the main body and is fixedly connected to the limiting plate 5.2. The limiting plate 5.2 matches the hollow part 2.1 of the main body (the outer diameter of the limiting plate 5.2 is smaller than the inner diameter of the hollow part 2.1 of the main body and larger than the inner diameter of the connecting hollow part 3.1). The working end 4 has a rounded edge on the working surface, specifically a spherical working end, a shovel-shaped working end or a curved working end. The inner wall of the main body 2 is provided with limiting plate limiting strips 5.5. There are multiple limiting plate limiting strips 5.5. The multiple limiting plate limiting strips 5.5 are distributed around the inner wall of the main body 2 and are arranged along the axial direction of the hollow part 2.1 of the main body.
[0042] The core of the pressure limiting device of the sinus membrane dissector for maxillary sinus lift surgery with pressure limiter is a pressure spring. The stiffness of the spring is precisely designed and calibrated, and a safe pressure threshold is preset. This threshold represents the upper limit of the ideal operating force that can effectively separate the mucosa without tearing it when dissecting the maxillary sinus mucosa.
[0043] The normal state of the sinus membrane dissector during the above-mentioned maxillary sinus lift procedure with pressure limiter is as follows: Figure 1 As shown:
[0044] When the doctor applies axial force to the working end 4 through the handle 1, if the force is less than or equal to the preset safe pressure threshold, the pressure spring 5.1 will not be over-compressed, and the whole consisting of the limiting plate 5.2 and the connecting rod 5.3 will remain locked or stable. At this time, the working end 4 can normally and continuously peel off the maxillary sinus mucosa, and the doctor can operate based on normal tactile feedback.
[0045] In the above-mentioned maxillary sinus lift procedure with pressure limiter, the sinus membrane dissector experiences excessive force (pressure exceeds limit, causing the entire assembly of the limiting plate 5.2 and connecting rod 5.3 to retract). Figure 2 As shown:
[0046] When the axial thrust applied by the doctor unexpectedly exceeds the preset safe pressure threshold, the excessive force will further compress the pressure spring 5.1. The compression of the pressure spring 5.1 will trigger the overall movement of the limiting plate 5.2 and the connecting rod 5.3, causing the working end 4 to retract axially relative to the handle 1 and the pressure limiting device 5 as a whole.
[0047] This retraction instantly reduces the force between the working end 4 and the sinus membrane, effectively limiting excessive pressure on the sinus membrane and preventing it from tearing or perforating due to excessive stress. Once the pressure returns to below the safe threshold, the entire assembly of the limiting plate 5.2 and the connecting rod 5.3 will reset, and the working end 4 will return to its normal working position.
[0048] Verification has shown that the maxillary sinus lift suture with pressure limiter of the present invention has a reasonable and relatively simple structural design. The presence of the pressure limiting device, i.e., the pressure limiter, gives it the ability to automatically limit the axial pressure applied by the operator, which can avoid sinus membrane tearing or perforation caused by excessive force, thereby maximizing the protection of the integrity of the maxillary sinus mucosa, improving the safety of the operation, and showing great application potential.
[0049] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of the present invention, and will not be elaborated here.
[0050] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.
Claims
1. A sinus membrane dissector for maxillary sinus lift surgery with a pressure limiter, characterized in that: It includes a handle, a main body, a connecting part, and a working end connected in sequence; The main body and the connecting part have interconnected hollow main body parts and hollow connecting parts, and the diameter of the hollow main body parts is larger than that of the hollow connecting parts; A pressure limiting device is provided inside the hollow part of the main body. The pressure limiting device includes a pressure spring, a lower spring limit member, a connecting rod, and a limiting plate. The lower spring limit member is fixedly installed inside the hollow part of the main body. One end of the pressure spring contacts the lower spring limit member and the pressure spring is arranged along the axial direction of the hollow part of the main body. The connecting rod is arranged inside the connecting hollow part. One end of the connecting rod is fixedly connected to the working end, and the other end extends into the hollow part of the main body and is fixedly connected to the limiting plate. The limiting plate matches the hollow part of the main body.
2. The sinus membrane dissector with pressure limiter for maxillary sinus lift surgery according to claim 1, characterized in that, A handle friction-enhancing sleeve is fitted onto the outer wall of the handle.
3. The sinus membrane dissector with pressure limiter for maxillary sinus lift surgery according to claim 1, characterized in that, The inner wall of the main body is provided with a limiting plate and a limiting strip.
4. A sinus membrane dissector with a pressure limiter for maxillary sinus lift surgery according to claim 3, characterized in that, The limiting plate has multiple limiting strips, which are distributed around the inner wall of the main body and arranged along the axial direction of the hollow part of the main body.
5. A sinus membrane dissector with a pressure limiter for maxillary sinus lift surgery according to claim 1, characterized in that, Both the main hollow section and the connecting hollow section are cylindrical structures and are coaxial.
6. A sinus membrane dissector with a pressure limiter for maxillary sinus lift surgery according to claim 5, characterized in that, The outer diameter of the limiting plate is smaller than the inner diameter of the hollow part of the main body but larger than the inner diameter of the connecting hollow part.
7. A sinus membrane dissector with a pressure limiter for maxillary sinus lift surgery according to claim 1, characterized in that, The working end surface has rounded edges; The working end is detachably mounted on the connecting rod.
8. A sinus membrane dissector with a pressure limiter for maxillary sinus lift surgery according to claim 7, characterized in that, The working end is a spherical working end, a shovel-shaped working end, or a curved working end.
9. A sinus membrane dissector with a pressure limiter for maxillary sinus lift surgery according to claim 1, characterized in that, The inner wall of the hollow part of the main body has an internal thread structure, and the outer wall of the lower spring limiter has an external thread structure that matches the internal thread structure. The lower spring limiter is threadedly connected to the hollow part of the main body.