28 results about "Tooth angulation" patented technology

This invention relates to the field of oral image analysis technology, specifically to a method for assisting in the identification of impacted teeth based on three-dimensional oral images. The method filters edge pixels in oral CT images to obtain enhanced images based on the degree of grayscale variation of these pixels and the shape, edge clarity, and grayscale distribution of their respective analysis areas. Then, based on the shape and tilt differences between the enhanced sagittal CT image and other tooth regions of the wisdom tooth in the three-dimensional oral model, the area of ​​the corresponding tooth region in the enhanced axial CT image, and the distance between adjacent tooth regions in the enhanced coronal CT image, the impacted wisdom tooth in the three-dimensional oral model is determined. This invention effectively improves the accuracy of impacted wisdom tooth identification.

The integrated adjustable impacted tooth auxiliary traction device comprises a base and an integrated adjustable traction mechanism. The base is connected to the surface of the impacted tooth. The integrated adjustable traction mechanism comprises an adjustable traction chain, at least two integrated traction mechanisms are arranged on the adjustable traction chain, the integrated traction mechanism comprises a connecting ring and a traction part, the connecting ring can be connected to form the adjustable traction chain, the traction part is provided with an opening, and the traction device can enter the traction part from the opening to continuously pull the impacted tooth. The integrated adjustable impacted tooth auxiliary traction device can not only build an adjustable chain structure to accurately control the length and direction of the free end, but also build an open hook structure of the free end through the integrated design of the opening, so that the closed orthodontic rubber band can be directly hung and pulled, the patient can complete the orthodontic rubber band hanging operation independently, and the clinical application is very convenient and fast.

The invention discloses a dynamic control system for crown cutting traction of impacted teeth. The dynamic control system comprises the following steps: acquiring the change trend of traction force along with time and the change trend of inflammation signals along with time in real time; controlling the micro excitation unit to apply micro vibration according to the change trend of the traction force and the change trend of the inflammation signal, and synchronously acquiring the periodic response waveform of the inflammation signal; s3, calculating a phase difference relative to micro excitation according to the periodic response waveform of the inflammation signal to obtain an inflammation phase sensitivity index; the maximum traction displacement increment and the minimum traction recovery interval allowed by the current traction period are calculated according to the degree that the inflammation phase sensitivity index deviates from the preset safe phase interval; according to each traction period, whether the accumulated traction displacement exceeds the maximum traction displacement increment or not and traction is executed when the traction interval is not smaller than the minimum recovery interval or not is judged; and dynamically adjusting an anti-inflammatory dose parameter based on the continuous change trend of the inflammation phase sensitivity index in the plurality of traction cycles.

The invention discloses a crown cutting and traction integrated tool for impacted teeth with inferior alveolar nerve injury risk, which utilizes a telescopic part made of a hydrogel material, has reversible performance of water absorption expansion and dehydration contraction, can realize micro-amplitude reciprocating deformation under the natural water environment change of an oral cavity or humidity control adjustment, and can be used for preventing and treating the impacted teeth with the inferior alveolar nerve injury risk. Therefore, slight stress stimulation in alternating directions is continuously applied to impacted teeth after traction is completed, periodontal ligament activity and an open state of a traction channel are maintained through reciprocating small force action, bridging hard connection between tooth roots and bone tissues is effectively prevented, initial resistance of second-time traction is remarkably reduced, and the secondary traction effect of the impacted teeth is improved. The operation risk of breaking through adhesion tissues again in clinic is reduced, the postoperative nerve traction complications and the tooth root absorption probability are further reduced, and the safety and efficiency of the whole treatment process are improved.

The invention belongs to the technical field of orthodontic instruments, and relates to an orthodontic device for drawing embedded impacted teeth, comprising: a fixing assembly comprising two groups of bands; the connecting assembly comprises a connecting piece; the stress application assembly comprises a traction hook and a spiral spring auxiliary bow, the spiral spring auxiliary bow is formed by continuously bending a traction wire in the axial direction of the traction wire to form a plurality of ring-shaped structures arranged at intervals, the bending direction of the ring-shaped structures is adjustable, and the number of the ring-shaped structures can be increased or decreased. Through the design that the traction wire is continuously bent in the traction direction to form the multiple spiral spring auxiliary arches which are arranged at intervals and are of the ring-shaped structures, the traction direction can be adjusted according to the bending direction of the ring-shaped structures, and the number of the ring-shaped structures can be adjusted according to the traction distance; the multiple ring-shaped structures arranged at intervals are used for providing continuous and soft traction force, the moving direction of teeth is accurately controlled, and the orthodontic treatment effect is guaranteed.

The invention belongs to the technical field of biomedical materials, and discloses a natural tooth composite material bone grafting scaffold for alveolar bone repair and a design and preparation method thereof. The method comprises the following steps: collecting orthodontic teeth, impacted teeth, multiple teeth, loose teeth and other natural teeth extracted in oral medical treatment, and performing technical treatment to obtain raw material powder; ball-milling and mixing the bioactive glass powder, the carbon-based material powder and the natural dental powder to obtain mixed powder; the mixed powder is used as a raw material, and the bone grafting scaffold is obtained through computer aided design and digital light processing technology 3D printing; and modifying the surface of the 3D printing bracket by using the polydopamine-carbon-based material composite coating to obtain the natural tooth composite material bone grafting bracket. The natural tooth composite material bone grafting scaffold obtained by the invention has good mechanical property, controllable degradation property and antibacterial property, and has good biocompatibility and osteogenesis efficiency.

The utility model provides a salix leaf drag hook for impacted tooth extraction surgery in oral and maxillofacial surgery, which relates to the technical field of medical instruments and comprises a holding part and a drag hook part, and the holding part is in a salix leaf shape; the draw hook part comprises a first draw hook and a second draw hook, the first draw hook and the second draw hook are symmetrically arranged at the two ends of the holding part, the first draw hook and the second draw hook are reversely folded in the same direction, the joint of the first draw hook and the holding part is in smooth transition, and the joint of the second draw hook and the holding part is arranged in a convex shape. According to the utility model, by designing the holding part in the shape of the willow leaf, flexible operation experience is provided, different hand types are adapted, and the stability is ensured; due to the double-end design, the drag hook can be operated at various angles, and the drag hook can flexibly adapt to impacted teeth at different positions; the head reflexed design can accurately pull soft tissues and expose the surgical field, and is suitable for complicated flap turning and boning operations; the micro-arc design enables the contact surface to be smoother, reduces compression on gingiva and soft tissue, and adapts to different soft tissue structures.

A guiding device mounted on an impacted tooth, comprising a hook and a wire connected to the rear end of the hook. The hook has a curved shape and capable of passing through the transverse perforation of the impacted tooth. A method for passing the guiding device through the impacted tooth, by using the hook to guide the wire through the transverse perforation. A fixing member mounted on the impacted tooth, formed using the aforementioned method. A tool for assisting passing the guiding device through the impacted tooth, comprising a handle and a receiving portion connected to the handle, the receiving portion comprising a receiving hole and a slot. The receiving hole is capable of tightly receiving the hook of the guiding device, and the slot is in communication with the receiving hole, allowing the wire of the guiding device to pass through and extend out of the receiving portion.

The invention discloses an embedded tooth impacted tooth positioning traction simulation system based on a 5D bionic technology, which comprises a jaw model and a pre-operation simulation system, the jaw model is provided with an alveolar socket, a tooth root model and an embedded tooth model are detachably arranged in the alveolar socket, the jaw model is provided with a traction device in a mutual matching manner, and the traction device is provided with a tooth root model and an embedded tooth model. The traction device comprises two fixers and a traction arch wire; the two fixers are sleeved on the tooth root model; the traction arch wire is connected with the two fixers; a closed curve for hooping the embedded tooth model is arranged on the traction arch wire; a positioning guide plate is used in cooperation with the tooth root models, a positioning window is arranged on the positioning guide plate, the position of the positioning window corresponds to the position of the embedded tooth model, and a model taking device is used in cooperation with the closed curve. A real operation environment is provided for a doctor, the positioning guide plate accurately corresponding to the position of the embedded tooth is combined, the traction device can be guided to be in place rapidly and accurately, the precision and efficiency of preoperative planning are greatly improved, and the operation risk is reduced.

The invention discloses a dental ultrasonic osteotome, relates to the technical field of ultrasonic osteotomes, and aims to solve the technical problems that an existing ultrasonic osteotome is not matched with low-position impacted teeth and gaps of embedded impacted teeth are increased. The working tip comprises a working tip body, the working tip body comprises a rod part connected with a handle, a neck part and a head part are sequentially arranged at the end, away from the handle, of the rod part, the head part is of a bent arc-shaped structure, the included angle between the axis of the head part and the axis of the neck part is 60-100 degrees, and a blade face is arranged on the head part. The head adopts the bent arc-shaped structure, and the head and the neck are vertically or obliquely arranged, so that on one hand, the head can bypass the top surfaces and the side surfaces of the teeth (similar to covering the teeth) through the bent arc-shaped structure, contact with the alveolar bone of the teeth and increase the gap of the alveolar bone part, and the difficulty of increasing the gap of the alveolar bone is reduced; and on the other hand, as the head part adopts the bent arc-shaped structure, when the covering and buckling teeth are in contact with the alveolar bone of the teeth, the shape of the tooth root can be fit to increase the gap of the alveolar bone, and the gap increasing effect is better.

The present application relates to the field of dental correction tools, in particular to a device for traction of impacted teeth. The device is composed of a traction hook and an appliance. The traction hook is adhered to the crown of the impacted tooth to be tractioned. The traction hook is composed of an adhesive accessory and a ligature wire. One end of the ligature wire is fastened to the adhesive accessory, and the other end of the ligature wire is free and curved into a hook. The appliance is composed of an elastic traction wire and a retaining device. One end of the elastic traction wire is embedded in the retaining device, and the other end of the elastic traction wire is curved and connected to the free curved end of the ligature wire of the traction hook. The device can reasonably adjust the traction direction of the impacted teeth in three-dimensional space, and can correct the impacted teeth in different dentition periods. The device has low requirements for the anchorage teeth, is simple to manufacture, low in price, and has remarkable effects.

This invention relates to a method, device, and medium for displaying mechanical information for risk warning during impacted tooth extraction. The method includes: Step S1: Obtaining the three-dimensional modeling results of each tissue unit; Step S2: Obtaining the modeling results of each tooth segment unit; Step S3: Constructing the tooth segment and its contact constraints with surrounding tissues; Step S4: Based on the constructed contact constraints, combined with the overall finite element stiffness matrix and operational load, solving for the displacement response of each finite element mesh; Step S5: Based on the displacement response of each finite element mesh and the shape function, obtaining the displacement matrix of each element, and further obtaining the strain tensor of each element; Step S6: Based on the constitutive matrix of the tissue material corresponding to each element and the strain tensor, obtaining the stress tensor of each element; Step S7: Comparing the stress tensor of each element with its pre-configured threshold and assigning color values ​​to the finite element mesh of each element. Compared with the prior art, this invention has the advantages of real-time performance and high accuracy.

A dental instrument includes a handle and an extension portion, the extension portion has a frontal protrusion that is used to hang an elastic traction ligature. An impacted tooth traction device includes a first bracket for being fastened to an impacted tooth, and a second bracket for being fastened to an anchor body, and the aforementioned elastic traction ligature that is used to connect the first bracket with the second bracket. A method for installing the impacted tooth traction device includes: fastening the first bracket to the impacted tooth, fastening the second bracket to the anchor body, and to connect the elastic traction ligature to the first and the second brackets after the elastic traction ligature is pulled to a certain length.

A magnetic traction device for impacted tooth, comprising a first magnetic component fixed to a normal tooth and a second magnetic component fixed to an impacted tooth. There is an attractive magnetic force between the first and second magnetic components, thereby pulling the impacted tooth toward the direction of the normal tooth where the first magnetic component is located.

This invention provides a guided orthodontic device for mandibular impacted teeth treatment, belonging to the field of oral medical device technology. It includes a lingual bar, multiple retention rings, at least one abutment, and at least one guide rod. The lingual bar is a continuous arc-shaped metal wire extending along the lingual side of the mandibular dental arch. The lingual side of each retention ring is fixedly connected to the lingual bar. The lower end of the abutment is fixed to the lingual bar, and its upper end extends upward and has an abutment portion for contacting the abutment tooth surface. The proximal end of the guide rod is fixed to the lingual bar, and its distal end extends towards the oral vestibule, with a connecting portion at its end for attaching a traction component. This invention provides stable, distributed surface anchorage through multiple retention rings, effectively transmits the gingival force experienced by the device to the abutment tooth through the abutment, further enhancing anchorage stability. The flexible, cantilevered guide rod with a connecting portion at its end enables control of the traction direction of the impacted tooth.

This invention discloses a method for segmenting impacted teeth and neural tubes based on media regions, belonging to the field of medical image processing technology. The method includes the following steps: S1000, preparation; S2000, model structure optimization; S3000, model training; S4000, continued training of the temporary model; S5000, segmentation prediction of impacted teeth and neural tubes. This invention improves the accuracy and fit of boundary positions, significantly enhances the segmentation accuracy and stability of low-media regions, and solves the technical problem of accurate semantic segmentation of structural overlap, media blurring, and boundary discontinuity regions in dental CBCT images.

Embodiments of the present invention provide a method and apparatus for determining the tooth number of a tooth. The method comprises: acquiring first dental crown data and second dental crown data of a same patient in at least one treatment stage; on the basis of the degree of overlap between the dental crown of a first tooth in the first dental crown data and the dental crown of a second tooth in the second dental crown data, determining the tooth number of the first tooth having a degree of overlap satisfies a first set threshold as the tooth number of the second tooth; and on the basis of a positional relationship between the dental crown of the second tooth having the tooth number and the dental crown of a third tooth, determining the tooth number of the third tooth, wherein the third tooth is any tooth other than the second tooth having the tooth number in the second dental crown data. By matching the tooth numbers on the basis of the first dental crown data and the second dental crown data, the tooth number of a corresponding permanent tooth in the second dental crown data and the tooth number of an impacted tooth in the second dental crown data are determined, thereby improving the efficiency and accuracy of determining the tooth number of a tooth.

The application provides a traction device for impacted teeth and a preparation and operation method, comprising a traction hook, a shaped traction auxiliary bow, a prop, a transpalatal bar (TPA), a buccal tube, an anterior incline bend and a loop bend. The device has flexible traction direction, can flexibly add the position of the traction hook according to the required traction direction, and solves the problem of strong foreign body sensation and discomfort when the patient wears the traditional traction device. The bilateral molars provide anchorage, reducing the influence on the single tooth around the impacted anterior tooth. The application solves the problems of insufficient anchorage and single traction direction in the prior art, improves the correction efficiency, and has the characteristics of simple preparation, comfortable wearing and the like.

1. Name of the product in this design: Disposable maxillofacial cooling bag. 2. Purpose of this design: For cold compress therapy in early stages of patients after impacted tooth extraction, temporomandibular joint surgery, acute facial sprains, contusions, etc. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model. 5. The bottom view is for parts that are not easily seen during use, so it is omitted.

The utility model provides an occlusal pad device for distal upright impacted teeth, and relates to the technical field of oral tooth correction, the occlusal pad device comprises an occlusal pad, the occlusal pad is configured to be adhered to anchorage teeth, the occlusal pad comprises a first area and a second area, the first area is configured to wrap tongue side tooth tips, and the second area is configured to wrap tongue side tooth tips. The second area is configured to wrap the buccal side tooth tip and contact with the central fossa of the pair of jaw teeth; the first region and the second region are further configured in a manner that the top surface of the second region is higher than the top surface of the first region in a state that the occlusal pad is adhered to the anchorage teeth; the bottom face of the occlusal pad further comprises a third area, the third area is located in the middle of the occlusal pad, and the third area is connected with at least one arch wire fixing piece. According to the utility model, the influence on the connecting effect of the arch wire fixing piece can be avoided, and the effect that the arch wire plays a role in guiding the mesial impacted molar to be distal and upright can be ensured.

The utility model discloses a drainage plug for an extraction operation of embedded impacted teeth, which comprises a main body structure and a drainage plug, the side wall of the main body structure is provided with at least one fixing unit used for anchoring the main body structure to the peripheral tissue of the alveolar fossa; one end of the main body structure is provided with an expandable limiting component which is matched with the inner wall of the alveolar fossa to prevent the main body structure from falling off; the main body structure is composed of multiple layers of degradable materials and comprises an outer functional layer and an inner supporting layer. Continuous exudate diversion is achieved through the drainage channel in the main body structure, effusion in a closed environment is reduced, so that the swelling and infection probability is reduced, through the double retention design of the side wall fixing unit and the expandable limiting component, the fitting performance of the drainage plug and an alveolar fossa is enhanced, intraoperative and postoperative disengagement is prevented, and the drainage effect is improved. The multi-layer degradable material is adopted, the outer functional layer rapidly degrades and drains, and the inner supporting layer slowly degrades and supports, so that the device does not need to be taken out, and new tissues are prevented from being torn.

The utility model provides an impacted tooth extraction bur with length scales, which comprises a bur handle and a bur head, a first scale line, a second scale line, a third scale line and a fourth scale line are respectively arranged on the surface of the bur handle, the bur head is fixedly connected with the bur handle, a groove is arranged on the surface of the bur head, and the first scale line, the second scale line, the third scale line and the fourth scale line are arranged in the groove. A notch is formed in the surface of the needle head at the edge of the cutter groove. Length scales are marked on the impacted tooth extraction bur, so that the working length is accurately evaluated, the depth of the bur sinking into tissues is determined, too shallow cutting is prevented, the cutting efficiency is improved, important anatomical structures such as inferior alveolar nerves and maxillary sinus mucosa are protected, the important anatomical structures are prevented from being damaged by the bur entering too deep positions, and the impacted tooth extraction bur is safe and reliable. And the scales at different intervals are adopted, so that better observation is facilitated, the problem of visual fatigue caused by long-time direct vision is avoided, the working length can be accurately evaluated, and the operation safety is greatly improved.

The utility model discloses an embedded tooth traction device which comprises an upper jaw gum, a lingual buckle, a tensioning piece, a connecting assembly, a hooking piece and a bonding block, the lingual buckle is connected to the outer side of a tooth, the exterior of the tensioning piece is fixedly connected with the lingual buckle, and the tensioning piece conducts traction correction on the outer side of the embedded tooth through the lingual buckle. The connecting assembly is connected to the interior of the palate gum through teeth, the hooking and pulling piece is connected to the interior of the palate gum through the connecting assembly and used for conducting traction correction on the inner side of the embedded tooth, and the bonding block is connected to the interior of the palate gum and used for wrapping and protecting the joint of the hooking and pulling piece and the connecting assembly. According to the utility model, the tongue side buckle, the tensioning piece, the connecting assembly and the hooking piece are matched for use, the tongue side buckle and the tensioning piece can be used for performing traction correction on the outer side of the embedded tooth, and the hooking piece and the connecting assembly are matched for performing traction correction on the inner side of the embedded tooth, so that the traction correction efficiency of the embedded tooth is improved.

The application discloses a device for assisting in guiding eruption in orthodontic invisible or fixed treatment, which comprises an adhesive upper return traction device, at least one orthodontic elastic ring and a traction hook; in use, the adhesive bottom plate of the adhesive upper return traction device is adhered to a target guiding eruption tooth; a suitable orthodontic elastic ring is selected and is sleeved between the upper return hook of the adhesive upper return traction device and the traction hook on the orthodontic invisible or fixed appliance; the orthodontic invisible or fixed appliance is worn, and the impacted tooth is pulled to the normal direction through the elastic traction force of the orthodontic elastic ring; the design of the device effectively increases the effective distance between the anchor point of the invisible or fixed appliance and the traction point of the impacted tooth, so that the elastic ring can smoothly exert the traction force, and the guiding eruption effect is improved; the device is simple in structure and convenient to operate, the traction can be performed through a tension spring or the elastic ring is hung by itself, and the convenience and comfort of treatment are improved.

The invention discloses a navigation method and device for maxillary embedded tooth windowing, and is applied to the technical field of dynamic navigation of alveolar surgery. Comprising the following steps: a patient wears a U-shaped tube for navigation system registration for CBCT scanning to obtain a CBCT image for navigation path design; determining the approach of the windowing operation according to the form and position of the diseased tooth of the patient in the CBCT image; selecting a reference plane from the 3D view of the navigation system as a navigation path plane; generating a navigation path of the windowing operation on the reference plane; and repeating the above method to complete the preliminary design of the navigation path, and finely adjusting the navigation path according to requirements. According to the method, the optimal navigation path is determined by dynamically analyzing the three-dimensional data of the oral cavity of the patient before the operation.

This invention belongs to the field of medical devices and relates to a saliva suction device for impacted tooth extraction. The saliva suction device includes a suction working end and a negative pressure control device. The suction working end is fixedly positioned in the retromolar pad area and comprises three suction parts, each positioned at a specific suction point. The negative pressure control device controls the negative pressure of each suction part. By distributing the suction parts across the suction points in the retromolar pad area and centrally controlling the negative pressure of each suction part, the saliva suction device completely avoids movement across the surgical area and does not obstruct the surgeon's surgical operation or field of vision. It also achieves the effect of hands-free, fixed suction.

The utility model discloses an orthodontic traction device for complex embedded teeth, which belongs to the field of orthodontics and comprises embedded teeth, a plurality of teeth are arranged at the bottoms of the embedded teeth, one end of each tooth is fixedly connected with a bracket, and the brackets are connected through the same arch wire in a penetrating manner. The outer wall of the arch wire is movably connected with two moving frames, and the sides, away from each other, of the two moving frames are fixedly connected with first universal joints. According to the correction traction device for the complex embedded teeth, by arranging an arch wire, a movable frame, a first universal joint, a second universal joint, a threaded rod and a threaded sleeve, when the traction device is used, the correction angle of the embedded teeth can be adjusted, and the situation that the embedded teeth deviate due to direct traction in the correction process is avoided; meanwhile, the situation that the occlusal force of a patient is reduced due to offset of the embedded teeth is avoided, and through thread self-locking of the threaded rod and the threaded sleeve, the correction stability can be guaranteed after the embedded teeth are corrected.