71 results about "Removable partial denture" patented technology

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.

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.

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.

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 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 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 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 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.