34 results about "Buccal Surface" patented technology

The utility model discloses a horizontal clamping screw retention type loose tooth fixing device, which comprises a lip-cheek side splint, a lingual palatal side splint and a retention screw, the lip-cheek side splint and the lingual palatal side splint respectively comprise a tooth fitting part and a retention part, the lip-cheek side splint and the lingual palatal side splint are respectively clamped on the inner side and the outer side of a tooth, and the retention screw is fixed on the lip-cheek side splint and the lingual palatal side splint. The opposite surfaces of the tooth fitting part are respectively matched with the lip buccal surface and the tongue palate surface of the tooth in shape, and the retention part is embedded in the tooth gap or the tail end of a dental arch and is fixedly connected through a retention screw. The dental implant can be used at the early stage of tooth loosening, and dentition defects can be repaired in time without affecting subsequent periodontal treatment.

A mouthpiece for oral cleaning of teeth of a user includes a tray configured to receive the teeth of an upper and / or lower jaw of the user, where the tray includes an occlusal portion, a lingual portion extending from a lingual edge of the occlusal portion, and a buccal portion extending from a buccal edge of the occlusal portion; a posterior extension extending from a posterior end of one of the lingual portion or the buccal portion of the tray, where the posterior extension includes an extension platen and extension bristles projecting from the extension platen, where the extension bristles clean at least a portion of a lingual surface or a buccal surface of the last molar and gums proximate to the last molar, not reachable by lingual cleaning elements or buccal cleaning elements, respectively, during operation of the mouthpiece.

The dental assembly comprises a first tooth socket and a second tooth socket which correspond to maxillary teeth and mandibular teeth respectively, and a plurality of retention structures, the first tooth socket is provided with a first buccal surface and a first lingual surface which are oppositely arranged, and the second tooth socket is provided with a second buccal surface and a second lingual surface which are oppositely arranged; the retention structures are connected with the first buccal surface and the second buccal surface, or the retention structures are connected with the first lingual surface and the second lingual surface, the dental assembly comprises a first half jaw and a second half jaw which are positioned on two sides of a dental midline, and the plurality of retention structures comprise a first retention structure and a second retention structure which are positioned on the first half jaw. The first retention structure is closer to the tooth midline than the second retention structure. According to the invention, relative rotation and relative movement of the first tooth socket and the second tooth socket are limited through cooperation of the first retention structure and the second retention structure, so that the relative position between the first tooth socket and the second tooth socket can be effectively controlled, and the correction effect can be effectively improved, such as in an application scene of jaw position adjustment.

An assembly comprising an abutment and gingival healing cuff. The gingival healing cuff fits over the abutment, wherein the cuff includes internal surfaces (e.g., at least one flat face, and at least one curved face) corresponding to the external surfaces of the abutment, so as to mate with one another. The gingival healing cuff can further include a rectangular box or other timing alignment structure positioned apical to a buccal alignment body, which serves as a buccal alignment marker once the buccal alignment body is removed, and which can aid in helping the practitioner know where the implant platform and abutment platform are located (even when hidden). Flowable composite, e.g., of a different color, can be placed into the rectangular box or other timing alignment structure to aid in identification of the buccal surface of the cuff and proper rotational alignment ("timing") of the abutment with the implant.

The utility model relates to a fish-mouth saliva drainage pad, and belongs to the technical field of medical instruments. The fish mouth saliva drainage pad comprises a drainage pad body and a drainage tube, the drainage pad body comprises a gingival surface and a buccal surface, the gingival surface and the buccal surface are oppositely arranged, and the peripheries, close to the edge, of the gingival surface and the buccal surface are attached to each other, so that a drainage channel is formed in the drainage pad body; one end of the drainage pad is an opening, and the other end of the drainage pad is an outlet; a plurality of drainage openings are formed in the front face and the two side faces of the gingival face, and the buccal face is integrally a closed face. One end of the drainage tube is an inlet and the other end is a connector; the drainage pad outlet is communicated with the drainage tube inlet. The fish-mouth saliva drainage pad provided by the utility model can manage saliva of an anesthetic patient in an operation, and has the effect of solving the problems of control sensitivity requirements and patient safety caused by excessive saliva secretion of the anesthetic patient in a lateral position operation.

The utility model discloses an invisible tooth socket component which comprises a first invisible tooth socket matched with a first tooth jaw, a second invisible tooth socket matched with a second tooth jaw and a guide plate, the first invisible tooth socket comprises a first buccal labial surface, a first lingual surface and a first contact surface connected with the first buccal labial surface and the first lingual surface; the second invisible tooth socket comprises a mounting surface corresponding to an adjacent tooth gap of the second tooth jaw, the guide plate is connected with the mounting surface, and when the first invisible tooth socket and the second invisible tooth socket are in an occlusion state, the guide plate abuts against the first contact surface so as to realize lowering, leading or retracting of the first tooth jaw. The guide plate is arranged corresponding to the adjacent tooth gap of the second tooth jaw, and when the first invisible tooth socket and the second invisible tooth socket are in an occlusion state, no matter which area of the first contact surface is abutted by the guide plate, the guide plate can apply acting force to the first contact surface; the first contact surface can transfer the acting force to the first tooth jaw so as to realize lowering, leading or retracting of the first tooth jaw.

The invention relates to the technical field of dental medical instruments, and particularly discloses an automatic root canal flushing device and a flushing method.The automatic root canal flushing device comprises a main machine, a handle and an intraoral soft connecting piece, the intraoral soft connecting piece is detachably connected with the handle, and a liquid outlet and a liquid suction opening are formed in the intraoral soft connecting piece; the flushing assembly is used for providing power for flowing of flushing liquid in the flushing pipeline; the intraoral soft connecting piece comprises a first positioning part and a second positioning part, the first positioning part is flexibly connected with the second positioning part, the first positioning part is used for being in contact with a lip-buccal surface, the second positioning part is used for being in contact with a tongue-palate surface, the liquid outlet is formed in the middle of the intraoral soft connecting piece, and liquid suction ports are uniformly distributed in the first positioning part; liquid suction ports are uniformly distributed in the second positioning part; the suction assembly is used for providing kinetic energy for liquid suction of the liquid suction pipeline. The device has the advantages that automatic flushing and liquid suction are achieved, and manual operation is simplified.

To provide a technology that contributes to achieving both durability and ease of attachment and detachment of orthodontic appliances. [Solution] The rigidity of the pair of crown attachment parts 2a, 2b, i.e., the portions 50a, 50b corresponding to the buccal surfaces of the crowns of the molars and the portions 51a, 51b corresponding to portions of the gums, is configured to be lower than the rigidity of the other portions (i.e., the portion 52b corresponding to the palatal and occlusal surfaces of the crowns of the molars, the portions 53a, 53b corresponding to the spaces between the molars, and the base portions 4a, 4b), makes it easier to engage (attach) and disengage (remove) the pair of crown attachment parts 2a, 2b from the molars. In other words, the ease of attaching and detaching the pair of crown attachment parts 2a, 2b to the molars is improved. Since the orthodontic device 1 can be held in the oral cavity simply by attaching the pair of crown attachment parts 2a, 2b to the molars, the device can be held in the oral cavity more easily than with conventional configurations in which the device is held in the oral cavity by wires.

The utility model discloses an accessory installation template which comprises a template body with a cavity for containing teeth, at least one accessory containing cavity located on the template body and at least one segmentation line located on the template body, and the template body comprises a first edge line located on the labial buccal surface of the template body and a second edge line located on the lingual surface of the template body. The segment line extends from the first edge line to the second edge line. According to the utility model, the operation of disconnecting the accessory mounting template by a user can be greatly simplified by arranging the segmentation lines, so that the deformation and the like of the accessory mounting template caused by the acting force when the accessory mounting template is disconnected by the user are reduced, and the use convenience of the accessory mounting template and the accessory mounting reliability can be improved; in addition, the segmentation line extends from the first edge line to the second edge line, that is, the segmentation line crosses the whole surface of the template body, when the segmentation line is completely disconnected, the accessory installation template can be divided into a completely disconnected multi-segment structure, and user operation is further simplified.

A clear aligner assembly (100), comprising a first clear aligner (10) that fits a first jaw (T1), a second clear aligner (20) that fits a second jaw (T2), and a guide plate (30), wherein the first clear aligner (10) comprises a first labial and buccal surface (11), a first lingual surface (12), and a first contact surface (13) connecting the first labial and buccal surface (11) to the first lingual surface (12); the second clear aligner (20) comprises a mounting surface (40) corresponding to an interdental space (P) of a second jaw (T2); the guide plate (30) is connected to the mounting surface (40); and when the first clear aligner (10) and the second clear aligner (20) are in an occlusal state, the guide plate (30) abuts against the first contact surface (13), so as to achieve the intrusion, protrusion or retrusion of the first jaw (T1). The guide plate (30) is arranged corresponding to the interdental space (P) of the second jaw (T2). When the first clear aligner (10) and the second clear aligner (20) are in an occlusal state, regardless of which region of the first contact surface (13) the guide plate (30) abuts against, the guide plate (30) can apply an acting force to the first contact surface (13), and the first contact surface (13) can transfer the acting force to the first jaw (T1), so as to achieve the intrusion, protrusion, retrusion, etc. of the first jaw (T1).

The application discloses a force couple orthodontic accessory, a personalized fixed appliance, a tooth correction system, a design method of the force couple orthodontic accessory and a design method of the tooth correction system. The force couple orthodontic accessory comprises a bottom plate, an accessory body and a force couple structure, the bottom plate is used for being bonded with a labial buccal surface of a tooth, the accessory body is provided with an arch wire accommodating cavity, and the force couple structure is arranged in the arch wire accommodating cavity and comprises protrusions and / or grooves which are symmetrically arranged on both sides of the channel and are used for cooperating with partial bending structures of an arch wire to form a force couple for a single tooth. The personalized fixed appliance comprises a plurality of force couple orthodontic accessories and a personalized arch wire, the arch wire is provided with partial bending structures corresponding to positions of teeth to be corrected, and a preset force couple is formed after loading. The force couple orthodontic accessory, the personalized fixed appliance and the tooth correction system provided by the application realize accurate force couple control of a single tooth and improve correction precision and a personalized degree.

An attachment that effectively reduces the incidence of undercut and improves the overall efficiency of tooth movement includes an attachment body with a gingival portion and a vertical portion. The vertical portion includes a mesial portion located mesially to the crown and a distal portion located distally to the crown. The gingival portion is close to the gingival margin and located slightly below the undercut of the crown. Both the gingival portion and the vertical portion have opposing lingual and buccal surfaces, opposing occlusal and gingival surfaces, and opposing mesial and distal surfaces. The lingual surface is bonded to the tooth surface. The gingival, occlusal, mesial, and distal surfaces are all arc-shaped or spherical. This structural design not only greatly increases the undercut of the tooth but also provides multiple contact areas and a larger force application area with the orthodontic appliance, providing more effective coverage area for mesial or distal tooth movement. This effectively reduces the incidence of undercut and improves the overall efficiency of tooth movement.

A dental overlay device includes a tooth wrap and a guide block extending from the tooth wrap. The tooth wrap is configured for contacting one or more teeth to secure the device in a fixed position relative to a tooth to be treated. A passageway of the guide block is configured to receive and contact the overlay device and thereby limit movements of the overlay device in the removal of the predetermined portion of the structure of the tooth to be treated. A tooth opening of the guide block is in communication with the passageway and is configured to expose only a buccal surface of the tooth to be treated such that only the buccal surface is in communication with the passageway. The overlay device is fabricated based on a computer-aided design model of the overlay device.

This utility model discloses a palatal support occlusal oral device, comprising an upper dental brace and a palatal support. The upper dental brace has a structure that engages with the upper teeth, including the buccal surface, lingual surface, and occlusal surface of the upper teeth. The palatal support includes a hard palate region corresponding to the hard palate and a soft palate region corresponding to the soft palate. Pressure sensors are respectively provided on at least the occlusal surface of the upper teeth and on both the hard and soft palate regions. This utility model, by placing sensors at multiple points on the tongue, palate, and occlusal surface, can detect pressure data at multiple points, thereby enabling coordinated analysis of multi-stage chewing and swallowing movements.

An assembly comprising an abutment and gingival healing cuff. The gingival healing cuff fits and mates over the abutment, wherein the cuff includes internal surfaces (e.g., at least one flat face, and at least one curved face) corresponding to the external surfaces of the abutment, so as to mate with one another. The gingival healing cuff can further include a rectangular box or other timing alignment structure positioned apical to a buccal alignment body, which serves as a buccal alignment marker once the buccal alignment body is removed, and which can aid in helping the practitioner know where the implant platform and abutment platform are located (even when hidden). Flowable composite, e.g., of a different color, can be placed into the rectangular box or other timing alignment structure to aid in identification of the buccal surface of the cuff and proper rotational alignment (“timing”) of the abutment with the implant.

The invention discloses an improved mandibular protraction position reconstruction appliance, which relates to the field of oral cavity correction, and comprises an upper jaw anchoring assembly and a lower jaw anchoring assembly which are respectively fixed on an upper jaw dentition and a lower jaw dentition and are matched with each other to realize mandibular protraction guidance, the device comprises an upper jaw crown, a buccal tube body and an adjusting component, the upper jaw crown is an unprepared adhesive crown, and the buccal tube body is fixed on the buccal side of the upper jaw crown; the buccal side tube body is a buccal surface square wire tube with a threaded hole formed in the side wall, a locking piece is arranged in the threaded hole, one end of the adjusting part is a square wire end, and the other end of the adjusting part is an arc-shaped end embedded with the lower jaw anchoring assembly; the mandibular anchoring assembly is matched with mandibular posterior teeth and comprises a mandibular crown and an arm-shaped embedding part; according to the appliance, the accurate control and retention of the protraction amount of the lower jaw are realized through the quantitatively adjustable locking mechanism and the unprepared adhesive crown.

The invention discloses an invisible tooth socket assembly which comprises a first invisible tooth socket matched with a first tooth jaw, a second invisible tooth socket matched with a second tooth jaw and a guide plate, and the first invisible tooth socket comprises a first buccal labial surface, a first lingual surface and a first contact surface connected with the first buccal labial surface and the first lingual surface; the second invisible tooth socket comprises a mounting surface corresponding to an adjacent tooth gap of the second tooth jaw, the guide plate is connected with the mounting surface, and when the first invisible tooth socket and the second invisible tooth socket are in an occlusion state, the guide plate abuts against the first contact surface so as to realize lowering, leading or retracting of the first tooth jaw. The guide plate is arranged corresponding to the adjacent tooth gap of the second tooth jaw, so that when the first invisible tooth socket and the second invisible tooth socket are in an occlusion state, no matter which area of the first contact surface is propped by the guide plate, the guide plate can apply acting force to the first contact surface; the first contact surface can transfer the acting force to the first tooth jaw so as to realize lowering, leading or retracting of the first tooth jaw.

A device for integrally closing front teeth scattered in a gap comprises a retention and connection device which integrally wraps all teeth in a dentition and is made of an orthodontic pressed film retainer high polymer material; the traction devices are located at the adjacent gaps of the lip and buccal surfaces of the front molar areas or molar areas on the two sides and are arranged in a bilateral symmetry mode, and the upper edges of the traction devices are flush with the junctions of the crown middle 1 / 3 and the crown neck 1 / 3 of the lip and buccal sides of the teeth; the lingual vacuoles are located on the lingual sides of the teeth of the patient, the height of the inner walls of the lingual vacuoles is consistent with the sagittal height of the teeth, and the shape of the inner walls of the lingual vacuoles is completely matched with the shape of the lingual sides of the teeth; the force application device is an elastic body part and is made of one of an elastic rubber ring, a rubber chain or a rubber line; the positioning window is a horizontal groove-shaped window formed in the fixing and connecting device and penetrates through the traction devices on the left side and the right side. According to the utility model, the problems of low correction efficiency, long treatment period, discomfort of a patient in wearing and high treatment cost in the prior art are effectively solved.

An optimized dental implant system comprising:-at least one dental implant; -at least one customized foundation pile; -at least one healing cap made of PMMA or PEEK material, which has a locking taper, has a flared lower portion and thus can be inserted and perfectly fitted onto the foundation pile; -at least one crown or temporary crown, which can be fixed to the pile by means of said cap, said cap being made of PEEK or PMMA. The invention relates to a subgingival prosthesis for a patient, said prosthesis consisting of:-a first subgingival portion having a buccal labial surface, a mesial surface, a distal surface and a palate surface adapted to mature connective tissue attachment and conjunctive epithelium attachment, and-a second subgingival portion having a height adapted to the height of chewing of the patient, said subgingival prosthesis comprising:-a first subgingival portion having a buccal labial surface, a mesial surface, a distal surface and a palate surface adapted to mature connective tissue attachment and conjunctive epithelium attachment;

We offer a new type of all-around cleaning toothbrush that reduces blind spots during cleaning and improves cleaning effectiveness. [Solution] The new all-directional cleaning toothbrush is equipped with a toothbrush handle 1, a toothbrush body 2 is provided at the upper end of the toothbrush handle, and a toothbrush head 3 is fixed to the upper end of the toothbrush body. A silicone strip 5 is fixed to the side of the toothbrush head, and a silicone pad 4 is fixed to the back surface of the toothbrush head. The silicone strip is formed in a U shape. A rotating shaft 6 is fixed to the upper end of the toothbrush handle, an annular groove is formed inside the toothbrush handle, and a locking mechanism is provided inside the annular groove, and the locking mechanism includes a connecting ring. In this invention, the silicone strip can effectively clean the space between the buccal tooth surface and the buccal mucosa. The U-shaped silicone strip follows the arc shape of the dentition well, and can perform gentle and comprehensive cleaning of the tooth surface and gingival margin during brushing.

The application discloses a minimally invasive osteotomies dental surgery guide plate and a manufacturing method. The surgery guide plate comprises a plurality of semi-enclosed single-jaw guide plates. The upper part of the semi-enclosed single-jaw guide plate covers or partially covers the occlusal surface of teeth to form a first fixed part. The side part of the semi-enclosed single-jaw guide plate covers the buccal surface or labial surface of teeth and the gum. The side part of the semi-enclosed single-jaw guide plate is further provided with a second fixed part and at least one surgery window formed in the side part. The semi-enclosed single-jaw guide plate is fixed in the oral cavity in a shape conforming to the teeth. The plurality of semi-enclosed single-jaw guide plates are spliced with each other to form the surgery guide plate. The surgery guide plate is composed of a plurality of semi-enclosed single-jaw guide plates which are positioned through the buccal side or the lingual side and are retained on the occlusal surface. The convenience of positioning the semi-enclosed single-jaw guide plate is improved. The design of the partial positioning is realized. The partial positioning is beneficial to the convenience of the clinician to perform the osteotomies. The undercut after the positioning of the surgery guide plate is reduced as much as possible.

The invention discloses a full-dentition anchorage spiral expansion device, and relates to the technical field of orthodontic medical instruments. Comprising a spiral expander, a left anchorage assembly and a right anchorage assembly, the orthodontic device is characterized in that each anchorage assembly comprises a groove-shaped metal full crown covering the occlusal surface, the cheek side surface and the lingual side surface of a plurality of rear teeth on the same side, an arch expansion tongue rod fixedly connected with the near-middle lingual side surface of the metal full crown on the same side, and an arch expansion cheek rod fixedly connected with the near-middle cheek side surface of the metal full crown on the same side; the device is high in retention force, high in bony expansion efficiency, good in tooth protection, high in patient comfort level and wide in application range.

An attachment mounting template (100), comprising a template body (10) having a cavity (S) for accommodating teeth, at least one attachment accommodating cavity (11) located on the template body (10), and at least one segment line (12) located on the template body (10). The template body (10) comprises a first edge line (101) located on a buccal-labial surface (A1) thereof and a second edge line (102) located on a lingual surface (A2) thereof, and the segment line (12) extends from the first edge line (101) to the second edge line (102). The provision of the segment line (12) simplifies the operation of a user of detaching the attachment mounting template (100), thereby reducing deformation caused by the force applied when the user detaches the attachment mounting template (100), and improving the convenience of using the attachment mounting template (100) and the reliability of attachment mounting; and the segment line (12) extends from the first edge line (101) to the second edge line (102), i.e., across the entire surface of the template body (10), and when the segment line (12) is completely broken, the attachment mounting template (100) can be separated into multiple completely detached segments.

This invention discloses a periapical radiograph centerline positioning device and method, comprising a personalized substrate, an angle positioning mechanism, and an optical indicator. The shape of the inner surface of the personalized substrate matches the anatomical morphology of the occlusal and buccal surfaces of the patient's target dentition. The angle positioning mechanism is fixedly disposed on the buccal side of the personalized substrate. The optical indicator is detachably mounted on the angle positioning mechanism. The angle positioning mechanism is configured to adjust and lock the angle of the optical indicator in both the horizontal and vertical directions. Using this device for positioning, this periapical radiograph centerline positioning device and method can materialize and visualize personalized digital angles, and guide the X-ray tube of the dental radiograph for precise and rapid alignment.

The invention relates to the technical field of orthodontic digital design, and discloses a method and electronic equipment for identifying a tooth FA point and an accessory pasting position and confirming a tooth torque angle, and the method for identifying the tooth FA point comprises the following steps: obtaining a three-dimensional tooth jaw digital model which comprises a series of three-dimensional tooth digital models; constructing a first section of each three-dimensional tooth digital model, wherein the first section of the reference point of the pasting surface is a plane which passes through the tooth center and is perpendicular to the tooth mesial and distal axis of the reference point of the pasting surface; calculating the FACC axis of a certain three-dimensional tooth digital model; the method comprises the following steps: intersecting a reference point first cross section of a pasting surface with a reference point three-dimensional tooth digital model of the pasting surface to obtain an intersecting line; selecting one section of the dental crown part on the lip-cheek side surface on the datum point intersecting line of the pasting surface as the FACC axis of the tooth; and selecting the midpoint on the axis of the datum point FACC of the pasting surface as the tooth FA point. The calculation is simple and convenient, and the obtained position of the FA point is accurate, so that the reference data in the digital design is more accurate.

The application provides a gypsum tooth carving method and system, wherein the method comprises the following steps: marking the carving surfaces of the labial surface, the lingual surface, the mesial surface and the distal surface on a gypsum strip; measuring the crown length on the four surfaces of the gypsum strip and marking the first mark, and marking the second mark at the preset position of the root length; drawing the mesial surface contour line and carving the gypsum strip to preliminarily form the mesial surface; drawing the labial surface contour line and carving the gypsum strip to preliminarily form the labial (buccal) surface; drawing the polyhedron graph on the axial surface and cutting the polyhedron to form the rudiment; drawing the neck margin curve and carving; carving the incisal edge or the occlusal surface; and finishing each surface. The gypsum tooth carving method is convenient for students to accurately and quickly master the gypsum tooth carving.

The invention discloses a jaw position registration method, device and equipment based on multi-dimensional intraoral scanning data, and the method comprises the steps: reading upper and lower jaw scanning data and occlusion record data of a user, and obtaining an upper jaw dentition point cloud, a lower jaw dentition point cloud, a left buccal surface point cloud and a right buccal surface point cloud based on the upper and lower jaw scanning data and the occlusion record data; performing up-down left point cloud registration based on the maxillary dentition point cloud, the mandibular dentition point cloud and the left buccal surface point cloud, performing up-down right point cloud registration based on the maxillary dentition point cloud, the mandibular dentition point cloud and the right buccal surface point cloud, selecting an optimal registration path according to a left path and right path registration result, and obtaining a coarse registration model according to the optimal registration path; and iterating the pose of the degree of freedom of the coarse registration model to obtain a registration model, wherein the occlusion mass fraction Q of the registration model is maximum. The method solves the fundamental problem that the point clouds of the upper and lower jaws have no overlapping area and cannot be registered.

A dental template for positioning one or more objects on teeth of a patient is disclosed. The dental template can include a plurality of teeth-receiving cavities that further incldue occlusal surface that correspond to occlusal surfaces of teeth. The template can also inclue buccal surfaces that conform to buccal tooth surfaces. The buccal surfaces of the template can include openings to control placement of one or more objects on the patient's teeth.

The invention relates to a rear tooth buccal surface defect filling forming structure which comprises a forming piece, the left side and the right side of the forming piece extend outwards to form side wings, an isolation wing extending towards the gingiva is arranged on the side close to the gingiva, and a material injection hole is formed in the middle of the forming piece; the forming piece is attached to the buccal surface of a target tooth, the two side wings are embedded into gaps between the two sides of the target tooth and adjacent teeth respectively, the isolation wings are arranged between the buccal surface of the target tooth and gingiva, and the injection hole corresponds to a buccal surface defect area; the buccal surface defect filling and forming sheet is attached to the buccal surface of the tooth and can surround the whole defect part, the isolation wings can stretch into the space between the gingiva and the tooth, cover the defect part located in the gingiva area and separate the gingiva from the defect part, contact between a repairing material and the gingiva during repairing is avoided, curing and forming of the repairing material are facilitated, and the repairing effect is good. The repairing effect is improved.