CAD / CAM is also called chair side immediate all ceramic restoration system. It is a cutting-edge technology used in dental restoration. It can not only carry out all ceramic inlay, but also complete crown and veneer restoration. It is completed in one time on the premise of minimizing damage to teeth and not damaging gums. It eliminates cumbersome steps such as impression and making temporary crowns. Its function and aesthetic degree can be comparable to that of natural enamel, The utility model has the advantages of high edge tightness, short repair time, and strong beauty and comfort.

The immediate all ceramic restoration system beside the chair is composed of three parts: blue light camera system, computer design system and grinding and cutting equipment: the blue light system uses short wave blue light to automatically capture clear images and build virtual models, and then automatically analyze the existing structure through biological reconstruction design software, complete the design of the restoration according to the collected tooth morphology, and transmit the data to the grinding and processing unit to complete the preparation of the restoration contour, Then the design shape of the prosthesis was grinded by the intermittent contact procedure. The whole process lasted about 20 minutes, which greatly shortened the patient's visit time. The process from taking the mold to pasting and fixing was completed at one time, without repeated adjustment and trial wearing. The patient did not need to endure the vomiting and discomfort caused by the traditional impression. The all ceramic teeth made of glass-ceramic materials have excellent biocompatibility with the human body. They will not have gingival redness, bleeding, black lines and other symptoms caused by the leakage of metal ions in the traditional porcelain teeth. They can be comparable to the natural enamel in terms of color resistance, strength and wear resistance, and can show a transparent and beautiful natural tooth color.

The immediate all ceramic restoration system beside the chair has matching Machinable materials, including feldspathic ceramics, artificial enamel glass ceramics and composite resin materials. The feldspathic ceramics have fine particle size and good polishing performance, and are suitable for patients with low color of abutment teeth and high aesthetic requirements; The texture of artificial enamel glass-ceramic material is very close to that of natural teeth, which is both castable and beautiful, easy to grind and conducive to clinical trial wearing and grinding; The composite resin material is mainly used for the production of anatomic temporary teeth that need to be used for a long time, and can also be used for the production of restoration wax.

After the restoration is designed and manufactured, the dentist will use composite resin cement to bond the restoration to the defect of the affected tooth. The contact surface between the restoration and the natural teeth is generally located above or flush with the gingiva, which is conducive to daily cleaning and prevents the formation of dental plaque. Meanwhile, it subverts the traditional full crown restoration, which is located under the gingiva. The edge of the restoration is exposed after gingival recession due to gingival aging or other reasons Not easy to clean.