71 results about "Removable partial denture" patented technology

The invention relates to an automatic CAD / CAM / 3D processing method of dental prostheses. The method comprises the step of processing dental prostheses by employing a composite system composed of an optical scanner and a computer aided design system, a CAD / CAM aided system, a selective laser cladding machine and a numerical control cutting machine tool, wherein prostheses such as removable partial dentures, fixed dentures, complete dentures and implant dentures can be rapidly manufactured. The method is characterized in that numerical control cutting (subtractive manufacturing called as subtraction) and the 3D printing technology (additive manufacturing called as addition) are organically combined and highly unified. Two aspects of the unity and opposites are merged into one uniform aspect; the automatic production efficiency of the dental prostheses, especially complex prostheses, can be greatly improved, complicated procedures of a conventional handmade dental prosthesis are eliminated, the manufacturing quality and stability of the prostheses are improved, the purposes of quickness, accuracy and individualized manufacturing are achieved, and the dental prostheses meet the urgent demands of most agomphosis patients.

A removable denture includes a denture base that is made of ultrahigh molecular weight polyethylene and is formed in a predetermined shape by a molded object of ultrahigh molecular weight polyethylene being cut; and artificial teeth that are arrayed at the denture base.

A removable denture system comprising a support beam fixedly attached to the individual's alveolar ridge above the mucous membrane by a plurality of dental implants, and a denture generally conforming with the dental parameters of the individual and integrated with a super-structure. The super-structure comprises at least a portion shaped in confirmation with the support beam, and a denture locking arrangement for removably though fixedly articulating the denture to the support beam preventing unintentional disengagement of the denture.

The invention discloses a process for quickly manufacturing a removable partial denture bracket by laser, which mainly comprises the following steps: acquiring a three-dimensional part model of a tooth jaw of a patient, adding an indented thin-wall support to the model, layering and dispersing to generate laser processing numerical control instructions, and paving powder on a preheated and insulated metal substrate; and then using a continuous YAG or fiber laser with the beam quality M<2> is smaller than 1.1 to melt metal or alloy powder in a special granularity range layer by layer by using optimized powder paving thickness, falling height of a forming cylinder and a laser processing technique under a focusing light spot of 10 to 100 mu m, and finishing melting, accumulating and processing of the whole part; and finally carrying out tempering heat treatment on the formed part, to obtain the removable partial deture bracket, which combines metallurgy and has a tissue density close to 100 percent. The process can overcome the difficulty of the prior art, and directly manufacture the removable partial denture bracket which has the advantages of high precision and high surface smoothness, no deformation and excellent mechanical property.

A detachable artificial local tooth is composed of upper and lower basic supporters, lateral locating structure arranged at the contact position between upper and lower basic supporters, fastening ring, branch supporter, and artificial tooth (or teeth). Its preparing process is also disclosed.

The present invention is a removable partial dental prosthesis comprised of a plastic framework. One or more acrylic prosthetic teeth are chemically bonded to the framework using dental acrylic.

A removable partial denture that does not have a palatal or lingual bar, strap or plate connecting both sides of an arch of the partial denture. In addition to the rests and / or clasps, the partial denture is held in position by the shape of the linguoplate, which conforms to the shape of the lingual surface of the teeth and alveolar mucosa, and the shape of a portion of the adjacent gum tissue of the patient.

The invention discloses a synchronous line fixing-moving joint restoration method. The synchronous line fixing-moving joint restoration method has the advantages that a scanning measurer, computer-aided design software of a dental prosthesis, a miniature SLM (synchronous line module)-metal 3D printer and a numerically-controlled milling machine are used for preparing all-ceramic and metal prosthesises, the fixing restoration of removable partial denture butment and the restoration of removable partial denture are synchronously completed, the clinical restoration efficiency of complicated cases is greatly improved, the clinical frequency of a patient is greatly reduced, and the chair-side operation time is shortened; the complicated procedure of traditional dental prosthesis manufacturing method is overcome, the manufacturing quality and stability of the prosthesis are improved, the purpose of quick, accurate and personalized manufacturing is realized, and the urgent demand of patients with tooth lack is well met.

The invention relates to a manufacturing method of removable dentures. Currently, the removable-denture manufacturing methods in all countries in the world are a thermos-coagulation packing method, need steps such as casing, filling, squeezer pressurizing and water bath polymerization (dental cast cooking pot), are complex in process, time-consuming and labor consuming, are non-uniform in moldingcase pressurizing and are difficult in precise mastering and control of heating speed and heating maintaining time during heat processing. The method has the advantages that the manufacturing flow oftraditional removable dentures is improved, joint height increasing and contraction bubbles of the removable dentures manufactured by the traditional manufacturing process are avoided, and the base-material filling of the partial removable dentures and attachment dentures can be performed; the models of the attachment dentures does not need to be pressurized on a squeezer, and the subfissure or deformation of the fixing-part porcelain teeth of the attachment dentures is avoided.

The invention discloses a removable denture and a manufacturing process thereof and belongs to the technical field of mouth rehabilitation. The removable denture has the advantages that the foreign body sensation is low and the simulation performance is good after the removable denture is worn. According to the technical scheme, the removable denture comprises bionic teeth and a base plate; the bionic teeth are fixed to the base plate, bionic resin fixing snap rings stretching to the two ends are integrally arranged on the lip and cheek side of the base plate, stainless steel wire bent snap rings and / or stainless steel wire continuous snap rings stretching to the two ends are fixed to the tongue palate side of the base plate, fixing regions fixed with natural teeth are formed on the two sides of the base plate by the bionic resin fixing snap rings and the stainless steel wire bent snap rings, and tooth brackets are arranged on the portions, close to the two sides of the fixing regions, of the base plate.

The invention provides a prosthesis making method based on digital design and numerical control machining, which comprises the following steps: a blocker model is digitally designed based on multi-source data, the blocker model data is obtained, and the blocker model is obtained by a numerical control forming device; the data of occluder model is obtained by removable partial denture stent designsoftware, and the stent model of prosthesis is obtained by numerical control forming device. The prosthesis scaffold model is placed on the occluder model, and the occlusal test is carried out. The prosthesis is obtained by filling glue and packed in a box. The invention is based on multi-source data fusion modeling, obstructor model is obtained by reverse design, and digital prosthesis is obtained according to the obstructor model, which reduces clinical operation difficulty of obstructor impression, shortens clinical production time, and reduces patient discomfort. The obstructor model and prosthetic stent model were made by digital technology, which can shorten the operation time of clinical and technical room, shorten the number of patients, reduce the difficulty of prosthesis and improve the work efficiency.

The invention belongs to the field of oral cavity repair and repair technologies, and relates to a digital design method of a removable partial denture rest. The method comprises the following steps:firstly, drawing design lines of component parts of the rest by using a pencil on a solid model according to requirements of a doctor and design theory knowledge of removable partial dentures; and then, performing three-dimensional scanning by using a scanner to obtain a three-dimensional digital model with the rest design lines, and carrying out digital design according to the scanned rest designlines. The modification of the digital design can be greatly reduced, the influence on the operation rate of design software is reduced, the whole flow is highly pipelined, the training difficulty ofoperators is reduced, and the production efficiency is improved.

The invention discloses a design method for a personalized removable local dentures holder, two dentures holders designed by the design method, and a manufacture method for the two dentures holders. The design method is subjected to integral forming design, patient clinic doctor seeing frequencies are reduced, and patient and doctor time is saved. The two designed dentures holders are both subjected to the integral forming design, and the problem of more dentures components in the prior art can be solved. The manufacture method is subjected to integral forming manufacture, and therefore, the problems in the prior art that a casting technology has a complex and complicated manufacture process and subtractive manufacturing materials can not be fully utilized can be solved.

The invention discloses a preparation method and system of a removable partial denture based on artificial intelligence. The method includes the following steps of 1, oral cavity examination, 2, toothpreparation, 3, model refinement, 4, dental cast manufacture, and 5, try-in and adjustment. The main mode manufacture process includes abutment tooth selection, database building and three-dimensional design. The system of the removable partial denture based on artificial intelligence includes a data input module, a data preprocessing module, a database, a data comparison module, a data adjustment module and a data output module. The output end of the data input module is in signal connection with the input end of the data preprocessing module. According to the preparation method and system of the removable partial denture based on artificial intelligence, when a base support is manufactured, through the combination of the actual situation and past cases, the manufacturing cycle is greatly reduced, many unnecessary troubles are avoided, patients do not need to run in removable partial dentures for a long time, the running-in cycle and pain are reduced, the work efficiency is improved,and the cost is thus reduced.

The invention relates to a removable partial denture interactive design method constructed based on vector graphics and solves the technical problems that in oral cavity diagnosis clinical practice atthe present stage, paper denture design sheets are prone to being damaged and lost, are not easy to store and manage and cannot provide structural data for follow-up reference use. The method comprises the following steps: (1) data definition and initialization: performing digital definition on a designed removable partial denture assembly and the position of the designed removable partial denture assembly and filling newly-built blank design with acquiescent digitized denture design data; (2) state switching: switching system drawing states according to a user operation; (3) drawing motion capture: capturing user mouse motion and modifying temporary drawing data to serve as response; (4) design rendering: reflecting user operation results through rendering; (5) motion capture finishing:capturing user mouse action and modifying formal drawing data to serve as response. The removable partial denture interactive design method disclosed by the invention can be applied to the field of partial denture design.

The invention provides a cast titanium alloy for oral restoration, which consists of the following components in percentage by weight: 1 to 15 percent of indium and the balance of titanium. The cast titanium alloy is prepared by the following steps of: smelting the titanium and the indium into an alloy ingot by using a vacuum arc furnace; carrying out solid dissolving treatment on the obtained alloy ingot at 850 DEG C for one hour and quenching; and carrying out hot rolling on the quenched alloy ingot so as to make the thickness of the alloy ingot be 1 to 2mm, and obtaining the cast titanium alloy. The cast titanium alloy has the advantages that: the components of the alloy have good biocompatibility, and cannot release toxic ions when used in an oral cavity; the cast titanium alloy is based on the titanium and inherits the excellent corrosion resistance of the titanium, so the cast titanium alloy has good corrosion resistance; the mechanical strength of the cast titanium alloy is higher than that of the pure medical titanium, so the cast titanium alloy is suitable for producing prosthesis with smaller sectional dimension, such as snap ring, support, crown and bridge, removable partial denture, and the like, and can improve the use experiences of the patients; and because the microhardness is greatly improved, the abrasive resistance of the alloy is improved, so when used as a metal dental crown, the cast titanium alloy can effectively resist the function failure caused by wear.

A combined short arm clasp for removable partial denture is arranged on two adjacent abutments (6). The combined short arm clasp for removable partial denture is characterized by comprising two cheek clasp arms (1), a clasp body (2), a rest (3), a small connector (4) and a tongue side antagonist (5) that are connected successively; the two cheek clasp arms (1) are connected with the clasp body (2) in a herringbone shape; elastic parts of the two cheek clasp arms (1) are arranged in gum embrasure between the two abutments (6); and tips of the cheek clasp arms (1) are lower than cheek axial ridge. On the premise of no damage on effects of retention, support and stabilization, the combined short arm clasp can reduce and eliminate expose of metal parts of the cheek clasp arms and improve aesthetic property of the denture.

The invention is suitable for the field of analyzing compatibility of false teeth and provides a quantitative evaluation method of compatibility of a removable partial denture cast metal support. The method comprises the following steps: A, preparing a standard dentition defect plaster model; B, preparing an RPD cast metal support on the standard dentition defect plaster model; C, preparing a plaster model containing RPD metal support tissue surface shape by a complex method; D, evaluating the compatibility of the RPD metal support by applying an optical scanning three-dimensional measurement method. By adopting quantitative analysis, the first-phase preparation is simple to operate, the detection result reflected by numerical values is objective and reliable, the detection precision is high, and the fine deformation of the RPD metal support can be further detected. By observing a 3D comparative result graph, the part with poor compatibility can be quickly found to facilitate subsequent processing error analysis, so that the processing process is optimized.

The invention relates to a high efficiency digital design method of removable partial denture. The method comprises the following steps: 1) three-dimensional scanning is carried out for the removablepartial denture designed and manufactured by hand and the dental model entity restored by the removable partial denture and the removable partial denture, and the whole storage is used as standard template data; 2) The current dental model which needs to be repaired with removable partial denture by three-dimensional scanning is denoted as data D1; 3) selecting a set of standard template data fromthat step 1) and recording as data D2; 4) take that non-missing tooth part as a common area, and registering the data D2 with the data D1 by a common area registration algorithm; 5) deleting the dental model data in the data D2; 6) on that basic of step 5), the standard template data of the removable partial denture is fine-tuned to meet the individualized requirement of the current dental jaw model, and the design is completed. The method greatly reduces excessive manual interactive design operation in the digital design software, improves the design level and efficiency of the operator, andimproves the design precision.

The invention provides a removable partial denture design scheme generation method, equipment and medium. The method includes: acquiring structural medical history data of a patient; determining abutment tooth selection schemes according to the structural medical history data, and aiming at each abutment tooth selection scheme, generating at least one structural removable partial denture design scheme according with known clinical design rules; adopting a grading and ranking model trained by historical data to perform grading and ranking of the various structural removable partial denture design schemes according with the known clinical design rules; determining one or more of structural removable partial denture design schemes with highest scores. By the removable partial denture design scheme generation method, equipment and medium, the technical problem that in related techniques, a removable partial denture clinical decision support system with a knowledge base incompletely covering all knowledge fails to solve unknown practical problems due to knowledge source limitation is solved, and the design level of the removable partial denture design schemes is raised.

The invention relates to a method for surface peening of a pure titanium false tooth rack. The method comprises the following steps that: the false tooth metal rack is manufactured according to a conventional method, and is subjected to primary grinding and polishing; local detachable false tooth rack is tried on in the mouth of a patient, and is modified, regulated and grinded; the rack is subjected to preprocessing to remove oxides and oil stains on the surface of the rack; the pure titanium rack is put into a closed vessel; the vessel is vacuumized to high vacuum of 10<-1>Pa; nitrogen is introduced into the vessel to ensure that pressure intensity in the vessel reaches 0.9-1.1*10<5>Pa; the false tooth rack is heated to the temperature between 500 and 600 DEG C to lead the surface of the pure titanium rack to react with the nitrogen to generate a titanium nitride film; and steps of tooth arranging, box packing and plastic filling are completed on the false tooth pure titanium rack which is subjected to the surface peening until the false tooth is completed.

The invention provides a 3D printing model intelligent preprocessing method and device for design component information and belongs to the technical field of 3D printing model preprocessing. According to the method, a three-dimensional CAD model of the removable partial denture and design component information thereof are obtained through a three-dimensional CAD model obtaining module, then a single target function for optimizing the supporting powder consumption, the 3D printing manufacturing time and the printing precision is designed according to the component surface size precision requirement and the component surface roughness requirement, finally the weight of a single target is set according to the actual requirement, and the tradeoff optimization among the 3D printing material cost, the 3D printing time cost and the 3D printing quality is realized. Model preprocessing does not need a large amount of operation by operators, and 3D printing model preprocessing is convenient and fast.

The present invention provides a removable full or partial denture containing a linguoplate and metal occlusion of a restoring tooth or teeth with composite facing for restoring a tooth or teeth on the dental arch of a patient, wherein the denture utilizes a metal casting having the linguoplate, and at least one denture tooth on one side of the arch, and the at least one denture tooth is an extension of the linguoplate.

The invention relates to a High-precision rapid manufacturing method for a removable partial denture. The method comprises the following steps: 1) three-dimensional scanning is carried out on a modelrequiring removable partial denture restoration; 2) designing that removable partial denture with the CAD software of the removable partial denture; 3) designing and 3D printing a dental preparation guide plate based on the designed removable partial denture; 4) guiding by that tooth preparation guide plate to carry out tooth preparation on the model; 5) re-three-dimensional scanning and designinga new removable partial denture for the model of the tooth body prepared; 6) that removable partial denture newly design in the step 5) is manufactured so as to be able to be submit to clinical use together with the dental preparation guide plate. The invention is helpful to reduce the guiding error of the dental preparation guide plate of the removable partial denture, and can simultaneously complete the dental preparation and the denture wearing in the clinic; and the restoration precision and the efficiency of the removable partial denture are remarkably improved.

The invention relates to a repairing, designing and manufacturing method of removable partial dentures. The repairing, designing and manufacturing method comprises the following steps that (1) dentition and gingiva which need to be subjected to removable partial denture repairing are subjected to three-dimensional scanning, and data D are recorded; (2) a support, a retainer, a connector, a base bracket and artificial teeth are designed by using CAD software; (3) a press-in type ball head spring plunger is designed in a denture guide flat panel area, and serves as a retaining device to replacevarious types of denture clamping rings; (4) gap cards are designed between teeth which are prone to being subjected to food impaction; (5) data fusion is conducted on all the designed structures andthe data D, and three-dimensional design of the repaired removable partial dentures is completed; and (6) a 3D printer is used for printing rear-row teeth, gluing is conducted, and manufacturing can be completed. According to the repairing, designing and manufacturing method of the removable partial dentures, the aesthetic effect of the removable partial dentures can be significantly improved, thenonphysiological lateral force on abutment is lowered, the long-term success rate of removable partial dentures repairing can be increased, and the repairing effect of removable partial dentures repairing can be improved.

The invention discloses a removable partial denture intelligent design method, which belongs to the technical field of 3D printing, and comprises the following steps: performing Boolean operation according to an edge-triangle intersection method, establishing a grid growth relation list, counting the overlap ratio of seed nodes, the number of triangular patches and the total area, and obtaining the integrating degree of a denture template model and an oral cavity model. According to the method, the technical problems of improving the operation speed, reducing the memory utilization rate and realizing intelligent recommendation of the false tooth template model are solved, the speed of intersection calculation is greatly improved, the redundancy of intersection calculation is reduced, the stability and efficiency of an algorithm are greatly improved, and meanwhile, the quality of a Boolean operation result is also improved; the method can quickly judge the spatial position relationship between the point and the model, is suitable for closed and open grid models, is stable and reliable in algorithm, has fewer non-popular or unstable triangular patches in the Boolean operation result, can perform continuous Boolean operation, and can be used for cutting simulation.

Belonging to the technical field of stomatologic instruments, the invention in particular provides a removable partial denture wearing and removing device. The removable partial denture wearing and removing device includes a connecting rod and a handle that are interconnected, the connecting rod is equipped with a buckle recess matching a buckle bulge arranged on the removable partial denture base, and the buckle recess is disposed at an end of the connecting rod far from the handle. The invention also correspondingly provides a denture base matching the removable partial denture wearing and removing device and a use method thereof. The removable partial denture wearing and removing device provided by the invention is suitable for crowds lacking self-care ability, transfers a force application area in a denture wearing and removing process to the outside of the oral cavity, also determines the guide rail direction and the handle joint direction through the direction of a denture insertion path, and is convenient for patients to easily complete correct denture wearing and removing actions. The transport power is uniform in the wearing and removing process, and does not cause denturedeformation easily. 3D printing technology or one-piece casting technology is employed to integrate the buckle bulge with the denture metal base into a whole, thus minimizing electrochemical corrosion.

The invention relates to a surface modifying method of a pure-titanium prosthesis. The method comprises the following concrete steps of: finishing the manufacture of a metal denture prosthesis according to a conventional method and primarily sanding and polishing; trying a removable partial denture prosthesis in the mouth of a patient, modifying and grinding; pretreating the prosthesis so as to remove oxides and oil stains on the surface of the prosthesis; putting the pure-titanium prosthesis in a closed container; pumping the container to a high vacuum degree of 10<-1>Pa; charging carbon steam into the container to ensure that the intensity of pressure in the container reaches 0.9-1.1*10<5>Pa; heating the denture prosthesis to 500-600 DEG C to ensure that the pure-titanium prosthesis reacts with the carbon steam to generate a titanium carbide film; and finishing steps of tooth arrangement, boxing and model charging on the denture pure-titanium prosthesis after surface modification until the denture is finished. The titanium carbide film formed on the surface of the pure-titanium prosthesis has the characteristics of extremely stable chemical property, low toxicity, wear resistance, high hardness, and the like.

The invention discloses a plate rod snap ring for a removable partial denture. According to the plate rod snap ring, the bottom of a U-shaped minor connector is connected with a connector; one end of the top of the U-shaped minor connector is connected with an occlusal rest on the mesial side of an oeclusal of an abutment, and the other end of the top of the U-shaped minor connector is connected with a distal adjacent panel; the distal adjacent panel is attached to a guide plane prepared from distal adjacent surfaces of the abutment; the cheek side upper end of the distal adjacent panel is connected with a retention arm; and the tail of the retention arm is clamped in an inverted concave area of the cheek side of the abutment and does not exceed a cheek axial ridge of the abutment. The plate rod snap ring for the removable partial denture does not influence the face and attractiveness of the patient, does not disturb the arrangement of artificial teeth and has a wide application range.

The invention discloses a synchronous line fixing-moving joint restoration method. The synchronous line fixing-moving joint restoration method has the advantages that a scanning measurer, computer-aided design software of a dental prosthesis, a miniature SLM (synchronous line module)-metal 3D printer and a numerically-controlled milling machine are used for preparing all-ceramic and metal prosthesises, the fixing restoration of removable partial denture butment and the restoration of removable partial denture are synchronously completed, the clinical restoration efficiency of complicated cases is greatly improved, the clinical frequency of a patient is greatly reduced, and the chair-side operation time is shortened; the complicated procedure of traditional dental prosthesis manufacturing method is overcome, the manufacturing quality and stability of the prosthesis are improved, the purpose of quick, accurate and personalized manufacturing is realized, and the urgent demand of patients with tooth lack is well met.