A dental endodontic root canal therapy reamer positioner

Abstract

The utility model discloses a kind of endodontic root canal therapy dilatation needle limiters, including handle, the upper end of the handle is fixedly connected with fixed ring, and fixed ring is fixedly connected with connecting rope on it, the lower end of the handle is fixedly connected with the body of being checked, and the upper end outside of the body of being checked is clamped with limit ring, the limit ring is fixedly connected with clamping block on it.The existence of limit ring can accurately limit the depth of the body of being checked into root canal, in the root canal treatment process, the root canal length of different teeth is different, by adjusting the position of limit ring, it can be ensured that the operation of dilatation needle in root canal is always in safe range, avoid excessive deep damage root apex tissue or beyond root canal cause unnecessary trauma, for molar and other root canal deeper teeth, limit ring can be adjusted to appropriate position, prevent dilatation needle from exceeding root apex hole in root canal preparation process, reduce the risk of occurrence of complications such as periapical periodontitis.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a limiting device for expanding needles in dental pulp root canal treatment. Background Technology

[0002] Root canal treatment, also known as endodontic treatment, is a surgical procedure in dentistry to treat pulp necrosis and root infection. During root canal treatment, a root canal reamer is used to remove the pulp and clean the area, removing pulp debris and bacteria. To prevent the reamer from extending beyond the root apex, the dentist needs to perform multiple measurements on the reamer during these procedures; a single treatment may require at least 36 measurements.

[0003] When manually operating the reamer, it is easy to go too deep due to lack of experience or variations in root canal anatomy, which may damage the root apex or destroy the root canal wall. Posterior root canals (such as molars) are often curved, and traditional reamers are difficult to adapt to the curvature, which may lead to lateral wall perforation or step formation. Different doctors have different operating techniques, and tools are needed to achieve a standardized treatment process.

[0004] Existing retaining rings that are not easy to disassemble may retain bloodstains or tissue debris. If they cannot be thoroughly cleaned, they may become dead spots for bacterial growth, increasing the risk of cross-infection. The fixed retaining ring may block the cleaning area of ​​the reamer (such as the threaded part), resulting in incomplete sterilization. Especially when using high temperature and high pressure sterilization, contaminants are easily left in hidden areas. Therefore, there is an urgent need for a reamer retainer for dental pulp root canal treatment. Utility Model Content

[0005] The purpose of this invention is to provide a limiting device for enlarging needles in dental pulp root canal treatment, thereby solving the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a limiting device for enlarging needles in dental pulp root canal treatment, comprising a handle, a fixing ring fixedly connected to the upper end of the handle, and a connecting rope fixedly connected to the fixing ring, a file fixedly connected to the lower end of the handle, and a limiting ring engaging the outer side of the upper end of the file, and a locking block fixedly connected to the limiting ring.

[0007] Preferably, the outer side of the handle is provided with grooves evenly distributed, and the grooves are in the form of a ring.

[0008] Preferably, the fixing ring is configured in a semi-circular ring structure, and the lower end of the connecting rope is sleeved on the fixing ring, so that the connecting rope can be connected to the outside world to prevent the device from falling off accidentally.

[0009] Preferably, the outer side of the die is provided with a guide groove with a threaded structure.

[0010] Preferably, the abrasive body is made of medical-grade stainless steel.

[0011] Preferably, the limiting ring is made of medical-grade silicone material.

[0012] Preferably, the limiting ring is composed of two sets of ring bodies that are engaged and connected. One set of ring bodies is fixedly connected to a locking block, and rubber locking balls are fixedly connected to both sides of the locking block. The other set of ring bodies is provided with a locking groove that cooperates with the locking block, so as to disassemble the limiting ring.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The presence of a limiting ring precisely limits the depth to which the reamer enters the root canal. During root canal treatment, the root canal length varies for different teeth. By adjusting the position of the limiting ring, it can be ensured that the operation of the reamer within the root canal is always within a safe range, avoiding excessive penetration that could damage the apical tissue or cause unnecessary trauma by exceeding the root canal. For teeth with deeper root canals, such as molars, the limiting ring can be adjusted to a suitable position to prevent the reamer from exceeding the apical foramen during root canal preparation, reducing the risk of complications such as periapical periodontitis.

[0015] Because the limiting ring is connected to the outer side of the upper end of the file by a snap-fit ​​mechanism and is fixed by a locking block, in actual clinical operation, doctors can quickly adjust it according to the specific conditions of different tooth root canals. If root canals of different lengths need to be treated sequentially, only the position of the limiting ring needs to be adjusted, without having to replace the entire reamer limiter, which greatly improves treatment efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the dental pulp root canal treatment enlarging needle limiter of this utility model;

[0017] Figure 2 This is a schematic diagram showing the exploded structure of the component of the dental pulp root canal treatment enlarging needle limiter, including the file and the limiting ring.

[0018] Figure 3 This utility model relates to a limiting device for enlarging needles in dental pulp root canal treatment. Figure 2 Enlarged schematic diagram of the structure at point A;

[0019] Figure 4 This is an exploded structural diagram of the handle of the dental pulp root canal treatment enlarging needle limiter of this utility model.

[0020] In the diagram: 1. Handle; 2. Fixing ring; 3. Connecting rope; 4. Screw; 5. Limiting ring; 6. Locking block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a dental pulp root canal treatment enlarging needle limiter, including a handle 1, a fixing ring 2 fixedly connected to the upper end of the handle 1, and a connecting rope 3 fixedly connected to the fixing ring 2, a file 4 fixedly connected to the lower end of the handle 1, and a limit ring 5 engaged on the outer side of the upper end of the file 4, and a locking block 6 fixedly connected to the limit ring 5.

[0023] The handle 1 has evenly spaced grooves on its outer side, and the grooves are in a ring shape. The fixing ring 2 is in a semi-circular ring shape. The lower end of the connecting rope 3 is sleeved on the fixing ring 2. The evenly spaced grooves on the outer side of the handle 1 can increase the friction when the hand is gripping it. Especially in humid environments (such as in dental treatment) or during long-term operation, it can effectively prevent the instrument from slipping. The ring shape of the groove fits the fingertips, providing a more stable grip, reducing operator fatigue, and improving control accuracy. The connecting rope 3 can be connected to other devices to prevent the device from shifting its position when stationary.

[0024] The file 4 has evenly distributed threaded guide grooves on its outer side. Made of medical-grade stainless steel, the threaded structure of the guide grooves guides the file 4 spirally forward along the root canal wall, reducing frictional resistance between the instrument and the canal wall. This is particularly suitable for curved root canals (such as molar root canals). The threaded design allows the cut dentin debris to be carried out of the root canal via a spiral path, preventing debris accumulation that could lead to root canal blockage or secondary infection. Traditional files 4 lack debris removal capabilities, and debris accumulation can easily affect the operating field of vision and treatment effectiveness. The spacing and depth of the threaded structure can be standardized to ensure that the file 4 cuts with constant pressure within the root canal, avoiding uneven force that could lead to lateral perforation of the root canal wall or the formation of steps. For example, in narrow root canals, threaded guide grooves can limit the lateral oscillation of the file 4, improving preparation accuracy. Medical-grade stainless steel (such as 304 or 316L) can withstand the corrosion of oral saliva, blood, and disinfectants (such as high-temperature and high-pressure sterilization), preventing instruments from rusting or becoming dull. Stainless steel is also less expensive and less prone to breakage due to metal fatigue, making it suitable for high-frequency use. Stainless steel can withstand rotational forces and pressures during root canal preparation, especially when dealing with hard tissues (such as calcified root canals). The threaded structure is less prone to deformation or wear, and the sharp edges of the threaded guide grooves can maintain cutting efficiency for a long time, reducing operational delays caused by dulling. Medical-grade stainless steel complies with medical device standards (such as ISO 10993), is non-irritating to periodontal tissues, reduces the risk of inflammatory reactions, and has a smooth surface that is easy to clean and disinfect, reducing the probability of cross-infection.

[0025] The limiting ring 5 is made of medical-grade silicone and consists of two sets of rings that interlock. One set of rings has a locking block 6 fixedly connected to it, and rubber retaining balls are fixedly connected to both sides of the locking block 6. The other set of rings has a groove that mates with the locking block 6. The two sets of rings can be quickly assembled and disassembled through the engagement of the locking block 6 and the groove. The dentist can adjust the position of the limiting ring 5 according to the tooth type (e.g., anterior teeth, molars) or differences in root canal anatomy to ensure precise and controllable depth of the reamer entering the root canal. Anterior teeth have shorter root canals. When the molar root canal is deep, some rings can be detached to reduce the limiting height; when the root canal is deep, more rings can be combined to extend the limiting distance. The rubber balls on both sides of the locking block 6 enhance the stability of the locking structure. The elasticity of the rubber balls can adapt to the small gaps between the rings, preventing the limiting ring 5 from loosening during root canal preparation (such as rotation or lateral pressure). The flexibility of medical silicone further buffers external impacts, preventing the limiting ring 5 from shifting due to instrument collisions. Medical silicone is non-toxic and non-irritating, and meets medical device standards (such as ISO). (10993) allows direct contact with periodontal tissues or the periapical region, reducing the risk of inflammatory reactions. The silicone is softer, preventing scratches on the root canal walls or pressure on the gingiva. The slight friction on the silicone surface prevents the limiting ring 5 from sliding on the file 4, maintaining stability even in humid environments (such as during root canal irrigation). When operating on curved root canals, the elasticity of the silicone absorbs some rotational stress, reducing the pressure of the limiting ring 5 on the root canal wall. Medical-grade silicone can withstand high-temperature, high-pressure sterilization, ultraviolet disinfection, or chemical disinfectants (such as glutaraldehyde), and is not prone to aging with long-term use. Even if deformed, the silicone will not affect the limiting accuracy due to rust or corrosion. The two sets of rings with interlocking design support quick disassembly, which is convenient for cleaning and disinfection (such as thoroughly rinsing the ring grooves after disassembly) or replacement of damaged parts. If the groove of one set of rings is worn, only that component needs to be replaced, without discarding the entire limiting ring 5, thus reducing the cost of use. The unique matching between the locking block 6 and the locking groove can prevent the limiting ring 5 from being installed incorrectly or in reverse, avoiding limiting failure due to operational errors. The elastic limiting effect of the rubber locking ball can indicate to the doctor whether the interlocking is in place, ensuring that the limiting ring 5 is firmly fixed.

[0026] Working principle: Adjust the position of the limiting ring 5 according to the root canal length of the target tooth. When the root canal of an anterior tooth is short, place the limiting ring 5 close to the tip of the file 4 to limit the depth of the reamer. When the root canal of a molar is long, move the limiting ring 5 to the upper middle part of the file 4 to allow for a longer operating range. The locking block 6 locks with the locking ring 5 to ensure that the limiting ring 5 will not loosen due to rotation or pressure, enter the root canal and enlarge. The operator holds the handle 1 and slowly inserts the file 4 into the root canal. When the limiting ring 5 contacts the tooth surface (such as the crown or dentin margin), it prevents the file 4 from going deeper and avoids going beyond the apical foramen. The threaded guide groove on the outside of the file 4 spirally carries the cut dentin debris out of the root canal, maintaining a clear operating field of vision.

[0027] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A limiting device for enlarging needles in dental pulp root canal treatment, comprising a handle (1), characterized in that: The upper end of the handle (1) is fixedly connected to a fixing ring (2), and a connecting rope (3) is fixedly connected to the fixing ring (2). The lower end of the handle (1) is fixedly connected to a file (4), and a limit ring (5) is engaged on the outer side of the upper end of the file (4). A locking block (6) is fixedly connected to the limit ring (5).

2. The dental pulp root canal treatment enlarging needle limiter according to claim 1, characterized in that: The handle (1) has grooves evenly distributed on its outer side, and the grooves are in the form of a ring.

3. The dental pulp root canal treatment enlarging needle limiter according to claim 1, characterized in that: The fixing ring (2) is configured in a semi-circular ring structure, and the lower end of the connecting rope (3) is sleeved on the fixing ring (2).

4. The dental pulp root canal treatment enlarging needle limiter according to claim 1, characterized in that: The outer side of the die (4) is uniformly provided with a guide groove in the form of a thread.

5. A limiting device for enlarging needles in dental pulp and root canal treatment according to claim 1, characterized in that: The abrasive body (4) is made of medical stainless steel.

6. The dental pulp root canal treatment enlarging needle limiter according to claim 1, characterized in that: The limiting ring (5) is made of medical-grade silicone.

7. A limiting device for enlarging needles in dental pulp and root canal treatment according to claim 1, characterized in that: The limiting ring (5) is composed of two sets of ring bodies that are connected by interlocking. One set of ring bodies is fixedly connected with a locking block (6), and rubber locking balls are fixedly connected to both the left and right sides of the locking block (6). The other set of ring bodies is provided with a locking groove that cooperates with the locking block (6).

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