34results about How to "Reduce the number of referrals" patented technology

The invention provides a method for dental restoration including direct modification of an abutment in the oral environment to obtain the ideal shape, contour, and margin placement. The method is featured with directly measuring the shortest distance X1 between a location L1 on the surface of the abutment and the surface of a surrounding object, and increasing the shortest distance X1 until it is not less than a predetermined value. The invention exhibits numerous merits such as simplified procedure, cost effectiveness, reduction of laboratory adjustment, reduction of chair time, and reduction of office visits.

The invention relates to a dental plastic photocuring composite material dowel pin and a preparation method thereof, which are technically characterized in that: the composition comprises photocuring resin, photosensitizer, photoinitiator, acrylic resin, thermal initiator, matrix resin triethylene glycolbismethyl-acrylate and reinforcing material of one-way fiber. The invention adopts two curing systems of a photocuring system and a thermal curing system, thus forming a mutual penetrating network structure; before the photocuring resin is not cured, the acrylic resin and the photocuring resin matrix mutually penetrate to form a cross network polymer since the acrylic resin has large molecular weight, a special polymer composite structure for compulsive mutual solution and synergy is formed on the molecular level, and the chains of the two polymers are mutually wound, thus ensuring the micro-pulverization of phase tissues, improving the interphase bonding force, giving a certain shape to a prepreg and further achieving the purpose of plastic property. The dowel pin and the method have the advantages that: the dowel pin can be used in the form of the prepreg, which can meet the requirements on the different curvatures of the different patients, realize the direct curing in the mouth and reduce the times of the return visits.

The invention discloses a manufacture method of a digital space retainer and relates to the technical field of pediatric dentistry. The manufacture method comprises the following steps: S1, scanning the oral cavity of a patient by using an intraoral scanner to acquire digital models of the maxilla and the mandible of the patient and acquire the occlusion relationship; S2, designing a digital modelof a digital space retainer by combining designing software based on the acquired digital models; and S3, manufacturing the space retainer by applying a PEEK/PEKK material and combining the digital model of the digital space retainer. According to the method, the digital model is acquired by scanning the oral cavity of a patient by adopting the digital scanning technology, intraoral impression manufacture is not needed, and the situation of discomfort, even nausea and vomiting generated when an impression is manufacture for a patient can be avoided; and the digital space retainer has a largeappearance improvement, excellent biocompatibility, half radiopacity of ray and plaque adhesion prevention by adopting the specific high-molecular material PEEK/PEKK.

The invention discloses a method for manufacturing an underjaw half mouth false tooth via a silicone rubber pressure impression. The method comprises the following steps of firstly manufacturing an individual tray which goes across an edge line, then embedding a hand adjustable type silicone rubber heavy body, lightly pressing the heavy body to a proper position in a mouth, taking out the heavy body after solidification to obtain a first-time impression, injecting a gun mixing type silicone rubber heavy body or an intermediate body respectively into the first-time impression and the mouth, then embedding the first-time impression into the mouth, performing heavy pressure at the proper position, solidifying, then taking out the impression to obtain an underjaw false tooth. According to themethod, the hand adjustable type silicone rubber heavy body combined with the gun mixing type silicone rubber heavy body or the intermediate body, which has slight poor fluidity, is utilized, a mucousmembrane is pushed open, excessive extension is performed, stressful functional impression is performed to prepare a horizontal impression for bone tissue so as to obtain underjaw surface outlines ofan inner oblique line, an outer oblique line and the like, so that the problems that the false tooth prepared from a traditional alginate impression is easy to press painfully and even alveolar ridgetop migration pain appears are solved, and the method can be used for preparing the false teeth of patients suffering from severe and extremely severe bone resorption.

The invention discloses a molar orthodontic appliance capable of conveniently applying orthodontic force. The molar orthodontic appliance comprises first bands, anchorages and expanding devices connected between the first bands and the anchorages in series; each expanding device comprises a screw, wherein the screw is provided with two outer threaded segments, the screwing directions of threads formed in the two outer threaded segments are opposite, a nut is connected to each outer threaded segment in a threaded mode, one nut is fixedly connected with the corresponding first band, and the other nut is fixedly connected with the corresponding anchorage; the first bands are used for being fixed to molars to be subjected to orthodontic treatment, and the axial direction of the screw is parallel to the middle-far direction of the molars. By adopting the orthodontic appliance, a patient can independently apply the orthodontic force on corresponding teeth, orthodontic force applying operation is easy, and the subsequent visit frequency of the patient can be effectively decreased.

The invention discloses a middle jaw tray, a using method and a manufacturing method applied to digital complete dentures. The tray comprises an upper jaw tray, a lower jaw tray, an occlusion positioning needle, an occlusion positioner and an external interface, the bottom surface of the upper jaw tray is a occlusal plane plate, the occlusion positioner is arranged on the occlusal plane plate, andthe lower jaw tray is connected with the occlusion positioner through the occlusion positioning needle; an external interface is arranged at the front end of the upper jaw tray and is connected witha handle interface or a face arch interface; one end of the handle connector can be inserted into the outer connector and fixed, the other end of the handle connector clamps the middle end of a face arch ruler, and the face arch ruler is parallel to the occlusal plane plate. One end of the face bow interface can be inserted into the external interface and fixed; by using the tray provided by the invention, a position relationship between the upper jaw and the lower jaw and the occlusal plane can be accurately obtained, and the subsequent prosthesis manufacturing process is simplified while thenumber of times of reexamination of a patient is reduced, so that an occlusion relationship of the final prosthesis is more accurate.

The invention relates to a preparation method of a frame type hollow denture, which has the steps as follows: (1) the maxillary defects are copied, thus preparing a maxillary module, a frame and a denture tissue surface base plate; (2) the hollow part of the denture tissue surface base plate is filled with wax, thus aligning artificial teeth and using the wax for producing a denture grinding surface base plate wax model; (3) silicon rubber are used for complex model of the artificial teeth and the denture grinding surface base plate wax model, thus obtaining a silicon rubber mold; (4) the silicon rubber mold is taken off, the denture grinding surface base plate wax model is scraped by 1.0 to 1.5mm, the silicon rubber mold is worn back, self-curing resin material is used for filling, thus obtaining a denture primary part; and (5) a hole is opened on the denture grinding surface base plate of the denture primary part, the heating is carried out, and the opened hole is sealed again after melting and discharging the filled wax for preparation. The frame type hollow denture tissue surface prepared by the method is well contacted with mucous membrane of a patient, thus improving the denture comfort of the patient, reducing the times of the revisits, reducing the clinical medical costs, lowering the processing difficulty of the denture and facilitating the manufacture.

The invention relates to an upper and lower jaw alveolar ridge angle measuring instrument and a use method thereof. The upper and lower jaw alveolar ridge angle measuring instrument comprises supporting seats on two sides, a parallel rod is arranged between the upper ends of the two supporting seats, the parallel rod is provided with a horizontal sliding groove, an angle measuring dial is rotatingly connected to and slidingly fits to the interior of the horizontal sliding groove, and the upper and lower sides of the angle measuring dial are respectively provided with elastically expandable angle measuring pointers. The structure is compact, can conveniently measure the angle between the upper and lower jaw alveolar ridge top joint line and the occlusal plane, is easy to use and can conveniently guides tooth discharge.

The invention relates to dental pulp capping and pulp retaining paste, which is prepared from iodine glycerin, iodophor, phenocamphor, creosote and zinc oxide powder, wherein the volume ratio of the iodine glycerin: the iodophor: the phenocamphor: the creosote is (3 to 4):(1 to 2):(1 to 2):(3 to 4); the ratio of the creosote(mL): the zinc oxide powder (g) is 1:(4 to 6); all ingredients are mixed and are prepared into the paste, and thus the dental pulp capping and pulp retaining paste is obtained. The paste has the advantages that after dental pulp is exposed, the nerve burnt killing, the nerve removal and the root canal therapy are not needed; the whole tooth body with the tooth root becomes a dead tooth; the dental pulp capping and pulp retaining paste is directly smeared on the exposed surface of the dental pulp, hard hulls can be formed on the surfaces of dental pulp active body cells; the normal physiological function state of the tooth body is stably recovered; in addition, the treatment process time is shorter; the subsequent consultation times of a patient are fewer; the work intensity of oral doctors is reduced. The pulp capping and pulp retaining paste can be applied to the protection of tooth body dental pulp exposure positions.

The invention relates to a medical tooth root post composite material. The medical tooth root post composite material comprises unsaturated polyester resin, curing agents, accelerant, quartz fibers and heat discoloration powder. The components are mixed in proportion, placed into an extruder and extruded in a stick-like mode at the temperature ranging from 80 DEG C to 120 DEG C. Cutting and packaging are conducted according to the size of required tooth root posts. The tooth root post composite material fills the blank in China and reaches the international advanced level, and the bending strength of a formed fiber post reaches 600 mpa. The composite material is good in elasticity modulus, light, high in strength, good in color and luster, superior in tooth repair, wide in application range, quick and easy to operate and suitable for repairing a dental crown with large-area missing, the fixing position of a fixed partial denture, detorted teeth, malposed teeth or rotated teeth and the like, has strong market competitiveness and wide market prospects, and the frequency of return visits of a patient is reduced.

The invention discloses a head-mounted child mouth breathing appliance and relates to the field of medical instruments. The appliance comprises an upper lip band, a lower lip band, a chin pad, a firstshort band, a second short band, a first upper lip long band, a second upper lip long band, a first chin pad long band, a second chin pad long band and a head-mounted fixing device. The upper lip band is located between the upper lip and the nose septum of a wearer, the lower lip band is located at the mentolabial sulcus of the wear, and the chin pad is located at the front lower part of the chinof the wearer; the first and second short bands are sequentially connected with the upper lip band, the lower lip band and the left and right ends of the chin pad from top to bottom; the lower ends of the first and second upper lip long bands are connected with the left and right ends of the upper lip band and the upper ends of the first and second short bands respectively; the upper ends of thefirst and second upper lip long bands and the upper ends of the first and second chin pad long bands are connected with the upper end and the lower end of the head-mounted fixing device respectively.The head-mounted child mouth breathing appliance has the advantages of not being likely to fall off, comfortable and firm to wear, high in supporting force and capable of improving the treatment effect.

The invention relates to the technical field of education equipment, and discloses a personalized intelligent exercise recommendation method and recommendation system. The exercise recommendation method comprises the following steps: binding any exercise resource to a corresponding position of a pre-constructed knowledge system; obtaining a user description file related to the answer result of the user, and constructing a user vector related to wrong questions of the user and a resource vector related to all exercise resources based on the user description file; screening the resource vectors based on the user vectors to obtain a first question set; screening the first exercise set based on exercise quality to obtain a second exercise set; the exercise quality is simultaneously related to an exercise source, an exercise error degree, an exercise type and an exercise searched rate; and recommending the second question set to the user. The recommendation system is built based on the recommendation method. According to the invention, personalized exercise recommendation can be carried out for students, so that not only is the problem of inscription tactics avoided, but also the exercise practice cannot achieve an expected effect all the time.

The invention discloses a multifunctional super-flexible wide-band bow for orthodontics, a wide-band bow bracket and a use method. The vertical width of the wide-band bow is 0.64 mm-1.27 mm, and the horizontal thickness of the wide-band bow is 0.25 mm-0.5 mm. 1-3 toggle pin holes are designed in a bottom plate surface of a bracket body along the long axis direction of teeth, a pair of slot wing bodies is arranged at the upper end and the lower end of the labial buccal surface of the bracket body respectively, a main slot is formed between the upper slot wing body and the lower slot wing body, and the upper part and the lower part of the outer side of each slot wing body extend outwards and freely protrude out of the corresponding slot wing body to form a slot wing, so that the common ligation type bracket is formed. The multifunctional super-flexible wide-band bow is simple in structure, reasonable in design, capable of expressing various orthodontic requirements, easy and convenient to operate, small in wide-band arch replacement times, short in treatment course which is generally about one year, high in torque root control force, capable of enabling teeth to be vertical to the stable normal axis inclination, and good in use effects, and dental defects are not liable to relapse after orthodontic treatment.

The invention discloses an orthodontic movable appliance retention device metal interproximal hook. The orthodontic movable appliance retention device metal interproximal hook comprises a hook end, a buccal side section, a lingual side section and an occlusal surface section, wherein the lingual side of the lingual side section is bent to form a connector, the connector comprises the lingual side section, the occlusal surface section and the buccal side section, the buccal side section is bent from the occlusal surface section into a gap between two teeth, the hook end is arranged at the end part of the buccal side section, and the inner side face of the hook end is in a semi-oval shape. The interproximal hook has the advantages of being small in size, small in tooth contact area, convenient to clean and wide in application range, has the advantages of retention, stability and good torsional force resistance, can more accurately pull and move the tooth position, retention nails are arranged on the surfaces of the two sides of the lingual side section, better mechanical retention is provided for a resin and metal connector, the binding force of the resin and the connector is increased, the interproximal hook is made of metal, has the advantages of being not prone to being broken, stable in performance and suitable for being used and popularized, and the clinical adjustment frequency and the patient re-visit frequency are reduced.