Oral chairside device prosthetic system industry development process3

2022-06-17

Digital restorative design software (CAD)

The transformative nature of software technology is not only reflected in the change of treatment technology and means, but also in the change of treatment thinking for dentists. For example
①Orthodontic treatment analysis: The traditional orthodontic therapeutic thinking is to combine the two-dimensional cephalometric measurement with the dental model (or digital dental model). diagnosis for treatment plan design, but nowadays doctors can apply to the oral multi-source data alignment fusion technology to integrate different forms of three-dimensional data such as the patient's CBCT reconstructed root and jawbone model, the color facial model obtained by three-dimensional surface scan together with digital dental model, which can be carried out The 3D cephalometric measurement, as well as tooth arrangement, diagnosis, analysis and treatment plan design in 3D space, has greatly opened up the doctor's treatment thinking, transformed the 2D model into a new 3D model, and presented new possibilities for orthodontic clinical treatment.
②Digital occlusion analysis: "Occlusion" has always been a topic of great concern to all disciplines of dentistry, especially orthodontics, prosthetics and orthognathic surgery. With the development of software technology, digital myringotomy software that simulates solid myringotomy has gained attention. 3Shape, Amanngirrbach, Cerec and other dental design software with digital myringotomy function can simulate the effect of occlusal analysis of many kinds of fully adjustable myringotomy frames commonly used in clinical practice and realize digital occlusal analysis.

Small CNC cutting equipment (CAM)

Computer-aided manufacturing (CAM) technology originated in industrial production and was originally created to address the need for high precision, batch manufacturing. When the CAD model of the restoration is designed, the data needs to be imported into the CAM software supporting CNC cutting equipment for machining, generating a profile containing tool selection, spindle travel path and speed, and material movement, based on high-speed cutting tools to process the blank from multiple directions in accordance with the movement path set in advance.CAM technology is introduced into dental treatment, in adapting to the individualized and customized needs of the oral The introduction of CAM technology into dental practice has made appropriate improvements in adapting to the individualized and customized needs of dentistry, and has also brought about tremendous changes, transforming the "manual workshop" of the laboratory in an industrialized model of the "machining center" type, with significant improvements in the stability of the quality of the execution and in the precision of the execution.
CAM technology in CNC machining as the representative of the subtractive processing technology is the mainstream technology, processing materials cover the existing dental clinical materials including: all kinds of metals (pure titanium, titanium alloy, cobalt chrome, gold alloy), resin, wax, plaster, ceramics, mixed gradient materials, etc. mainly used in the field of dental prosthetics fixed denture, movable denture, implant denture production.

Digital manufacturing technology in the field of dental prosthetics application status

The difference lies in the different degrees of freedom of the cutting tools and blanks for movement and rotation, and directly determines the complexity of the geometry of the restorations that can be processed by the equipment. 4 and 5 axis equipment can process large, complex restorations with smooth external surfaces. The surface finish and corner fit of the restorations depend on the size of the smallest diameter cutting tool.
The advantages of CAM are:
(1) high machining accuracy, good surface finish of the fabricated restorations, and no excessive post-processing after machining;
(2) low requirements for the integrity of the STL (standardtriangle language) file generated from the CAD design of the restorations, allowing for small errors in the model such as small holes, pegs, bad edges, etc.;
(3) a wide range of machinable materials;
(4) good internal homogeneity of the machined restorations;
(5) the ability to machine the restorations. The internal homogeneity of the restoration is good.