Mandibular impacted tooth extraction with lingual anti-extraction device

Abstract

The utility model discloses a kind of tongue side anti-falling devices for mandibular impacted tooth extraction, including tongue side extension pressboard, dentition positioning curved surface connecting body, connecting rod and handle connected in turn, and flexible silica gel buffer layer is equipped on the tissue contact surface of tongue side extension pressboard and dentition positioning curved surface connecting body, dentition positioning curved surface connecting body is the groove structure of "U" type or half "U" type, and tongue side extension pressboard and connecting rod are respectively connected in the both ends of the opening of dentition positioning curved surface connecting body end portion.The utility model realizes effective fit with tongue side bone plate anatomical structure, provides stable and reliable rigid blocking, while avoiding to cause irritation to patient tongue root part, and meet aseptic operation specification, to improve the safety, efficiency and patient comfort of operation.

Description

Technical Field

[0001] This utility model relates to a lingual anti-dislodgement device for the extraction of impacted mandibular teeth, belonging to the field of auxiliary instruments technology for alveolar surgery. Background Technology

[0002] Impacted tooth extraction is a common procedure in alveolar surgery. In clinical practice, for patients whose impacted teeth are predominantly lingual, there is a significant risk of the tooth dislodging into the lingual soft tissue space during extraction. Currently, the standard procedure involves the surgeon manually blocking the tooth by placing their fingers on the patient's tongue. However, this method has significant drawbacks:

[0003] First, it is difficult for the fingers to fully conform to the shape of the lingual bone plate, so the blocking effect is unreliable and there is still a risk of teeth falling out. Second, the insertion of the fingers can easily trigger the patient's pharyngeal reflex, causing nausea, vomiting and other discomforts, interfering with the smooth progress of the surgery and increasing the patient's fear.

[0004] Therefore, existing technology lacks a dedicated instrument that can effectively and safely prevent impacted teeth that are lingually dislodged into the soft tissue space and improve surgical comfort. Utility Model Content

[0005] The technical problem to be solved by this invention is: how to prevent impacted teeth that are biased towards the lingual side from falling into the soft tissue space during the extraction of impacted teeth.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is to provide a lingual anti-dislodgement device for mandibular impacted tooth extraction, including a lingual extension pressure plate, a dental arch positioning curved surface connector, a connecting rod, and a handle connected in sequence. A flexible silicone buffer layer is provided on the tissue contact surface of the dental arch positioning curved surface connector and the lingual extension pressure plate. The dental arch positioning curved surface connector has a "U"-shaped or semi-"U"-shaped groove structure. The lingual extension pressure plate and the connecting rod are respectively connected to the two ends of the opening of the dental arch positioning curved surface connector. The dental arch positioning curved surface connector and the lingual extension pressure plate are movably connected.

[0007] Preferably, the surface of the tooth positioning curved surface connector forms an angle with the surface of the lingual extension pressure plate.

[0008] Preferably, the tooth positioning curved surface connector and the lingual extension pressure plate are movably connected by a hinge, thereby adjusting the angle between the surface of the tooth positioning curved surface connector and the surface of the lingual extension pressure plate.

[0009] Preferably, the angle adjustment range of the tongue-side extension pressure plate in the sagittal plane is 0-60 degrees.

[0010] Preferably, the lingual extension pressure plate and the tooth positioning curved surface connector are connected by an angle adjustment structure with locking function.

[0011] Preferably, the tongue-side extension pressure plate and the tooth positioning curved surface connector are connected by a damping hinge or ball joint, and a locking structure is provided at the connection.

[0012] Preferably, the handle has an ergonomic structure; the surface of the handle has an anti-slip texture; the surface of the flexible silicone buffer layer that contacts the teeth has a frosted or micro-textured treatment; the edge of the dental arch positioning curved surface connector has a rounded corner structure, and a gap is reserved at the position of the corresponding gingival papilla.

[0013] Preferably, the connecting rod is an angled bending structure that avoids the surgical field of view and the lips and conforms to the mechanical transmission path of oral surgery; or the connecting rod is an "S" shaped structure.

[0014] Preferably, the handle and connecting rod have a channel inside, one end of which is connected to a standard negative pressure interface for connecting a negative pressure suction tube at the tail end of the handle, and a row of drainage holes or guide grooves are opened on the edge of the tongue-side extension plate that fits the bone surface and the wound area, and the other end of the channel is connected to the drainage holes or guide grooves.

[0015] Preferably, the tongue-side extension plate has a tongue-blocking extension wing that curves inward toward the inside of the oral cavity on the side opposite to the bone surface.

[0016] This invention provides an instrument specifically for the extraction of impacted mandibular teeth. It overcomes the inherent defects of manual obstruction, achieves effective fit with the anatomical structure of the lingual bone plate, provides stable and reliable rigid obstruction, avoids irritation to the base of the patient's tongue, and complies with aseptic operation standards, thereby improving the safety, efficiency and patient comfort of the surgery.

[0017] Compared with the prior art, the present invention has the following significant advantages: 1. A robust and rigid protective barrier is constructed to prevent medical accidents such as tooth tissue slipping into the parapharyngeal space.

[0018] Current techniques for extracting mandibular third molars that are located on the lingual side rely mainly on the surgeon's fingers or conventional retractors for lingual protection. Due to the thinness of the lingual bone plate, the narrow surgical field, and the patient's tendency to swallow, it is very easy for the direction of force to be uncontrollable when using instruments such as dental elevators to apply dislocation force. This can cause the tooth or broken root to break through the lingual bone wall / periosteum and slide into the deep parapharyngeal or sublingual space, leading to life-threatening complications such as severe deep space infection, respiratory distress, and mediastinal infection.

[0019] This invention features a lingual extension plate that extends deep into the oral cavity and closely conforms to the lingual bone plate of the mandible. During extraction, the lingual extension plate forms a robust physical barrier on the lingual side. Even if the tooth or tooth fragments accidentally shift towards the lingual side, they will be directly blocked and intercepted by the lingual extension plate, fundamentally eliminating the most dangerous complication risk in mandibular impacted wisdom tooth extraction and greatly improving surgical safety.

[0020] 2. By innovatively using the dental arch as a fulcrum, the protective device is stably fixed and the operating force is safely transmitted.

[0021] Traditional lingual retractors require an assistant to apply continuous force to pull, and because the fulcrum is on soft tissue, slippage is very likely to occur, and the operating space is cramped.

[0022] This invention utilizes a curved connecting body for dentition positioning, which straddles and engages with the mandibular premolar dentition like a "bite block." This shifts the force fulcrum of the instrument from "unstable soft tissue" to "stable hard tissue (dental arch)." When the dentist holds the ergonomically designed handle to maintain the protective barrier, the downward pressure is evenly distributed across multiple strong teeth by the curved connecting body. This not only ensures the absolute stability of the lingual extension plate on the working surface and frees up the assistant's hands, but also effectively avoids the risk of loosening or cracking of the fulcrum teeth due to excessive force at a single point.

[0023] 3. The use of a flexible medium to transmit pressure effectively avoids iatrogenic compression damage to soft and hard tissues.

[0024] Metal retractors, under prolonged and intense pressure, can easily lead to adverse consequences such as ischemia and necrosis of local mucosal tissue or enamel scratches.

[0025] This invention incorporates a flexible silicone buffer layer on the tissue contact surfaces of both the dentistry positioning curved surface connector and the lingual extension retractor. This feature not only prevents accidental slippage of the instrument in the moist oral environment by increasing friction, but more importantly, the deformable properties of silicone create an excellent buffer zone between the rigid metal framework and the fragile biological tissues (gingiva, lingual mucosa, and periosteum), achieving non-traumatic retraction and significantly reducing postoperative complications and pain for patients.

[0026] 4. Modular and standardized design, highly adaptable to complex individual anatomical differences, meeting the clinical needs of multiple scenarios.

[0027] Patients vary in their mandibular morphology, the degree of tongue enlargement, and the requirements for surgical field of view.

[0028] This invention provides three specification systems: S, M, and L, and is divided into two configurations: a standard type and a tongue-guarded reinforced type. In particular, the tongue-guarded reinforced type, by adding lingual extension wings, not only prevents the tooth from falling deeper but also effectively displaces an enlarged tongue. This structural design allows this invention to flexibly address various complex clinical anatomical conditions, improving the instrument's versatility and clinical applicability. Attached Figure Description

[0029] Figure 1 A schematic diagram of a lingual anti-dislodgement device for the extraction of impacted mandibular teeth; Figure 2 Diagram showing the usage status of a lingual anti-dislodgement device for mandibular impacted tooth extraction (I); Figure 3 Diagram (II) showing the usage status of a lingual anti-dislodgement device for mandibular impacted tooth extraction. Figure 4 Diagram showing the usage status of a lingual anti-dislodgement device for mandibular impacted tooth extraction (Part 3); Figure 5 Diagram (IV) showing the usage status of a lingual anti-dislodgement device for mandibular impacted tooth extraction. Figure 6 This is a diagram showing the usage status of a lingual anti-dislodgement device for mandibular impacted tooth extraction (Figure 5). Detailed Implementation

[0030] To make this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0031] Example 1 This utility model provides a lingual anti-dislodgement device for mandibular impacted tooth extraction, applicable to the extraction of impacted teeth that deviate to the lingual side. For example... Figure 1 As shown, it includes a lingual extension receptacle 4, a handle 1, a connecting rod 2, a curved surface connector for dentition positioning 3, and a flexible silicone buffer layer (similar to an occlusal block). The flexible silicone buffer layer is respectively disposed on the tissue contact surfaces of the curved surface connector for dentition positioning 3 and the lingual extension receptacle 4 (the side of the curved surface connector for dentition positioning 3 that contacts human tissue or teeth, and the side of the lingual extension receptacle 4 that contacts human tissue or teeth). One end of the handle 1 is connected to one end of the connecting rod 2, the other end of the connecting rod 2 is connected to one end of the curved surface connector for dentition positioning 3, and the other end of the curved surface connector for dentition positioning 3 is connected to one end of the lingual extension receptacle 4. The surface of the curved surface connector for dentition positioning 3 and the surface of the lingual extension receptacle 4 form an angle, the angle ranging from 0-180°. Figure 6As shown, the dental arch positioning curved surface connector 3 and the lingual extension pressure plate 4 are movably connected by a hinge 11, thereby adjusting the angle between the surface of the dental arch positioning curved surface connector 3 and the surface of the lingual extension pressure plate 4. The hinge 11 can be embedded in both sides of the dental arch positioning curved surface connector 3 and the lingual extension pressure plate 4, respectively. That is, grooves for hiding the hinge 11 are provided on opposite sides of the dental arch positioning curved surface connector 3 and the lingual extension pressure plate 4, and are connected by snap-fit ​​or countersunk screws. Alternatively, the dental arch positioning curved surface connector 3 and the lingual extension pressure plate 4 can be integrally formed on both sides of the hinge 11.

[0032] This utility model is available in two configurations: a standard type and a tongue-stopping enhanced type, each offering three size systems: S / M / L. The standard type consists of a tongue-side extension pressure plate 4, a handle 1, a tooth alignment curved surface connector 3, and a flexible silicone buffer layer. The tongue-stopping enhanced type adds a tongue-blocking extension wing 9 to the standard type, such as... Figure 4 As shown.

[0033] The core logic of this utility model is: using the dental arch as the fulcrum and the lingual extension plate 4 as the working surface, pressure is transmitted through a flexible medium to avoid the tooth body or tooth fragments entering the parapharyngeal space when extracting the mandibular third molar that is biased towards the lingual side.

[0034] In this embodiment, as Figure 2 , Figure 3 As shown, the flexible silicone buffer layer on the tissue contact surface of the dental positioning curved surface connector 3 is a flexible silicone buffer sleeve 8; the flexible silicone buffer layer on the tissue contact surface of the lingual extension plate is a flexible silicone buffer sheet 7.

[0035] I. The lingual extension retractor 4 is the core working component, extending downwards and outwards from the dental arch positioning curved surface connector 3 to conform to the lingual structure of the mandible. The lingual extension retractor 4 is multi-dimensionally adjustable. Its angle adjustment mechanism is as follows: the lingual extension retractor 4 and the dental arch positioning curved surface connector 3 are connected by a damping hinge or ball joint (in this embodiment, an A-401 adjustable torque medical hinge is used), and the connection point is equipped with a locking function. The lingual extension retractor 4 is adaptable: it allows for 0-60 degree angle fine-tuning in the sagittal plane to adapt to the inclination of the lingual bone wall of different patients. The lingual extension retractor 4 is made of Ti6Al4V medical-grade titanium alloy or 316L surgical-grade stainless steel, as it needs sufficient strength to withstand the force exerted when the dental elevator pushes the tooth out. In this embodiment, a flexible silicone buffer sheet 7 is integrally injection molded onto the side of the lingual extension retractor 4 near the tooth.

[0036] In one embodiment, the lingual extension pressure plate 4 and the tooth positioning curved surface connector 3 are connected by a damping hinge with locking function. The damping hinge includes a rotating shaft and a damping component. The rotating shaft is equipped with a gear locking / friction self-locking structure, which can maintain the position when rotated to a preset angle.

[0037] In another embodiment, a damping hinge is provided between the tongue-side extension pressure plate 4 and the tooth positioning curved surface connector 3. A locking pivot assembly is coaxially provided at the hinge axis of the damping hinge. The locking pivot assembly is used to lock the angle after the damping hinge is rotated into place.

[0038] In another embodiment, the lingual extension pressure plate 4 and the dental positioning curved surface connector 3 are connected by a ball joint assembly. The ball seat of the ball joint assembly is fixed on the dental positioning curved surface connector 3. A rotating shaft with locking function is provided between the ball seat of the ball joint assembly and the lingual extension pressure plate 4. The rotating shaft can rotate relative to the lingual extension pressure plate 4 and lock at the target angle, so as to drive the ball joint assembly to achieve orientation locking.

[0039] 2. The dental arch positioning curved surface connector 3 is a U-shaped or semi-U-shaped groove structure that simulates the shape of an occlusal block. It is used to straddle the mandibular dentition and has a silicone occlusal layer (i.e., a flexible silicone buffer sleeve 8) to mediate occlusal forces for retention. The lingual extension plate 4 and the connecting rod 2 are respectively connected to the two ends of the opening of the dental arch positioning curved surface connector 3.

[0040] The function of the dental positioning curved surface connector 3 is as follows: ① Stress dispersion: Using the dental arch as the main force fulcrum, the downward pressure during operation is evenly distributed to multiple teeth to avoid single-point force causing tooth loosening or microcracks. ② Metal clip 10: This clip can connect to a silicone occlusal block (i.e., flexible silicone buffer sleeve 8) that is compatible with the U-shaped connector (i.e., the tooth alignment curved surface connector 3), utilizing the patient's tense biting force during surgery to assist in fixing the instruments; such as Figure 5 As shown, the metal buckle 10 has a bent structure, and the flexible silicone buffer sleeve 8 has bending holes on both its front and rear sides. The dental positioning curved surface connector 3 has a groove. When the flexible silicone buffer sleeve 8 is fitted onto the dental positioning curved surface connector 3, one end of the bent metal buckle 10 is inserted laterally into the flexible silicone buffer sleeve 8 and the dental positioning curved surface connector 3 in sequence until the outermost vertical bent edge of the metal buckle 10 is pushed laterally into the bending hole of the flexible silicone buffer sleeve 8 and completely submerged, thus locking the flexible silicone buffer sleeve 8 and the dental positioning curved surface connector 3 together. This is to lock / fix the flexible silicone buffer sleeve 8 and prevent it from moving.

[0041] ③ Avoidance design: The edges of the dental arch positioning curved surface connector 3 are rounded, and a small gap is reserved at the corresponding gingival papilla to prevent compression of the gingival edge.

[0042] 3. Connecting rod 2 is S-shaped or bent at a specific angle. The angle of this bend must avoid the surgical field and the lips, conforming to the mechanical transmission path of oral surgery. Handle 1 is ergonomic, with a non-slip texture on its surface. Its diameter and weight ratio have been balanced through testing, making it suitable for prolonged holding and reducing hand fatigue for the surgeon.

[0043] IV. Material Selection for the Flexible Silicone Buffer Layer: Medical-grade liquid silicone is used, with a Shore hardness controlled between 40-50 degrees. Key Technical Points: ① Anti-slip and friction-enhancing: The surface in contact with the teeth is treated with sanding or micro-texturing to increase the friction with the teeth / mucosa and prevent the instrument from slipping; ② Soft tissue protection: A buffer layer is formed between the metal skeleton (i.e., the tooth positioning curved surface connector 3, the handle connecting rod 2 and the lingual extension plate 4) and the biological tissue, completely eliminating iatrogenic damage (such as mucosal ischemia and necrosis, enamel scratches) caused by hard metal pressure.

[0044] 5. A channel 5 is provided on the proximal edge of the handle 1 and connecting rod 2. The channel 5 is a hollow flat cavity. One end of the channel 5 is connected to the tail end (proximal end) of the handle 1 with a standard negative pressure interface. The standard negative pressure interface is used to connect the negative pressure suction tube. A row of miniature drainage holes 6 or guide grooves are opened on the edge of the lingual extension plate 4 (i.e., the area that fits the bone surface and the wound), so that the lingual extension plate 4 itself becomes a flat negative pressure suction tube.

[0045] The tongue-side extension pressure plate 4 has a hollow cavity inside. One end of the hollow cavity of the tongue-side extension pressure plate 4 is connected to the other end of the channel 5, and each drainage hole 6 or guide groove is connected to the hollow cavity. Apart from the port connected to the channel 5 and each drainage hole 6 or guide groove, there are no other openings on the tongue-side extension pressure plate 4 that communicate with the outside.

[0046] The above features address the pain points of the narrow surgical area on the lingual side, which is prone to blood and fluid accumulation and makes it difficult to place an independent negative pressure suction tube. The microchannel structure is integrated inside the lingual extension plate 4. While pressing the periosteum for physical obstruction, the negative pressure connected to the negative pressure suction tube actively suctions away blood, irrigation fluid, and saliva under the flap, maintaining a clear surgical field. The "retractor" and "suction device" are combined into one, avoiding the crowding caused by placing multiple instruments in the narrow lingual space at the same time, and reducing the reliance on additional assistants.

[0047] VI. Enhanced tongue design For cases of enlarged tongue or tongue that may interfere with surgery, a lateral extension structure (i.e., tongue blocking extension wing 9) is added to the standard design.

[0048] Structural Features: On the inner side of the lingual extension retractor 4 (the side facing away from the bone surface, i.e., the side closer to the tongue), a baffle (i.e., the tongue-blocking extension wing 9) extends inward toward the oral cavity. The tongue-blocking extension wing 9 is connected to the lingual extension retractor 4 via a hinge 11 (e.g., an A-401 adjustable torque medical hinge), and the connection relationship is the same as the connection relationship between the tooth positioning curved surface connector 3 and the lingual extension retractor 4 and the hinge 11. The part of the tongue-blocking extension wing 9 away from the curved surface connector can be opened like a door. When the tongue needs to be retracted, it can be opened like a door and the angle adjusted. When not in use, it can be closed without affecting other operations. It can be opened when in use and stored in the lingual extension retractor 4 when not in use.

[0049] Key technical points: ① Physical barrier: While compressing the periosteum, a "wall" is formed to block the tongue from the surgical area; ② Ease of operation: Prevents accidental injury to blood vessels and nerves in the ventral part of the tongue during occasional slippage.

[0050] Materials and manufacturing process of this utility model: Metal skeleton: Ti6Al4V medical titanium alloy or 316L surgical grade stainless steel (titanium alloy is lightweight, high-strength, and has excellent biocompatibility).

[0051] Silicone liner (i.e. flexible silicone cushioning layer): The silicone is directly and integrally injected onto the surface of the metal frame using an over-molding process (eliminating the risk of detachment caused by adhesive bonding, ensuring a tight and seamless bond, facilitating cleaning and disinfection, and preventing bacterial growth; the entire structure can withstand high-temperature and high-pressure steam sterilization at 134℃, meeting the operating room reuse standards).

[0052] In another embodiment, the flexible silicone buffer sleeve 8 can also be detachably installed on the dental arch positioning curved surface connector 3. When detachably installed on the dental arch positioning curved surface connector 3, two flexible silicone buffer sleeves 8 of different sizes can be installed on the dental arch positioning curved surface connector 3. The thickness cross-section of the two flexible silicone buffer sleeves 8 is U-shaped, and they can be fitted onto the dental arch positioning curved surface connector 3 from the upper and lower ends (inner and outer sides of the dental arch positioning curved surface connector 3, the inner side being the tooth surface that the dental arch positioning curved surface connector 3 contacts, i.e., the U-shaped groove position; the outer side being the occlusal tooth surface that the dental arch positioning curved surface connector 3 contacts, i.e., the U-shaped convex position) respectively. During installation, first insert a flexible silicone buffer sleeve 8 whose U-shaped groove matches the size of the dental arch positioning curved surface connector 3, and then insert another flexible silicone buffer sleeve 8 whose U-shaped groove matches the size of the outer wall of the first flexible silicone buffer sleeve 8. The grooves of the two flexible silicone buffer sleeves 8 are arranged opposite each other.

Claims

1. A lingual anti-dislodgement device for mandibular impacted tooth extraction, characterized in that, The device includes a lingual extension plate (4), a dental arch positioning curved surface connector (3), a connecting rod (2), and a handle (1) connected in sequence. Both the dental arch positioning curved surface connector (3) and the lingual extension plate (4) have a flexible silicone buffer layer on their tissue contact surfaces. The dental arch positioning curved surface connector (3) is a U-shaped or semi-U-shaped groove structure. The lingual extension plate (4) and the connecting rod (2) are respectively connected to the two ends of the opening of the dental arch positioning curved surface connector (3). The dental arch positioning curved surface connector (3) and the lingual extension plate (4) are movably connected.

2. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The plane of the tooth positioning curved surface connector (3) forms an angle with the plane of the lingual extension pressure plate (4).

3. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 2, characterized in that, The tooth positioning curved surface connector (3) and the lingual extension pressure plate (4) are movably connected by a hinge (11), thereby adjusting the angle between the surface of the tooth positioning curved surface connector (3) and the surface of the lingual extension pressure plate (4).

4. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The angle adjustment range of the tongue-side extension pressure plate (4) in the sagittal plane is 0-60 degrees.

5. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The lingual extension pressure plate (4) and the tooth positioning curved surface connector (3) are connected by an angle adjustment structure with locking function.

6. A lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1 or 5, characterized in that, The tongue-side extension pressure plate (4) and the tooth positioning curved surface connector (3) are connected by a damping hinge or ball joint, and a locking structure is provided at the connection.

7. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The handle (1) is ergonomically designed; the surface of the handle (1) is provided with an anti-slip texture; the surface of the flexible silicone buffer layer that contacts the teeth is treated with a frosted or micro-textured structure; the edge of the tooth positioning curved surface connector (3) is rounded, and a gap is reserved at the position of the corresponding gingival papilla.

8. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The connecting rod (2) is an angled bending structure that can avoid the surgical field of view and the lips and conforms to the mechanical transmission path of oral surgery; or the connecting rod (2) is an "S" shaped structure.

9. A lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The handle (1) and connecting rod (2) are provided with a channel (5). One end of the channel (5) is connected to the standard negative pressure interface for connecting the negative pressure suction tube at the tail end of the handle (1). A row of drainage holes (6) or guide grooves are opened on the edge of the tongue-side extension plate (4) that fits the bone surface and the wound area. The other end of the channel (5) is connected to the drainage holes (6) or guide grooves.

10. The lingual anti-dislodgement device for mandibular impacted tooth extraction as described in claim 1, characterized in that, The tongue-side extension plate (4) is provided with a tongue-body blocking extension wing (9) that bends toward the inside of the oral cavity on the side opposite to the bone surface.

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