The research of CAD/CAM cutting pottery and porcelain

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Be opposite at present but the research of cutting pottery and porcelain basically is increasing respect of sex of data strength He Ren centrally. CAD/CAM is inchoate use data is what become beforehand is plastic with the porcelain that bake, since 80 time, be aimed at the brittleness of pottery and porcelain, increase mechanical strength, raise material to machine function, the clinical service life that adds material and color respect did a large number of research. Can have for the pottery and porcelain of machine treatment at present but ceramics of the feldspathic porcelain of cutting, glass, alumina porcelain. One, feldspathic porcelain but the feldspathic porcelain of cutting is divided into natural and feldspathic porcelain and synthesis feldspathic porcelain. Natural and feldspathic porcelain has VitamkI, Vitamk Ⅱ (V7R, V7K) . Among them Vitamk Ⅱ is more commonly used, metallographic analysis shows: Bases is SiO2, AI2O3, K2O, Na2O, form mutual stagger reticulate structure. Its grain size is differ, it is 2-6 micron on average, two distributing inhomogenous, the tooth after can be being made only embeds the complete coronal of body, double fang. Vitamk Ⅱ has 5 kinds of color to be able to offer an alternative. The crystallization photograph of VitaMark Ⅱ is fully feldspathic (Sanidine) , stretch model quantity is 73.

4Gpa, bending strength is 84MPa, rupture tenacity is 1.

07MPa/m1/2. Synthesizing feldspar is a kind of Bloxx porcelain in still studying on porcelain, it is one kind is contained " synthesize crystal " porcelain, colorful effect is had in different level, cutting performance is good at the same time. It is better to can be obtained after glaze fight lose a sex. 2, vitreous ceramics but the vitreous ceramics of cutting has DicorMGC (- L, - D) , DicorMGC - F, they all are K2O - MgF2 - MgO-SiO2 system, contain crystal of mica of 4 silicon fluorine, the difference depends on whether adding AL2O3, the oxide such as ZrO2. DicorMGC - the diameter of the micaceous grain of F about 4-5 micron, 2 micron of DicorMGCl ～ , so DicorMGC - F has better mechanical performance than DicorMGC. 1/2 of the tooth after DicorMGC can be made embeds the complete coronal of body, double fang. Research shows DicorMGC oneself wear and tear is more than Vitamk Ⅱ , but be less than latter apparently to the wear and tear of enamel. ProCAD is a kind of glass ceramics that contains leucite crystal, after glaze at 3 o'clock Mm2 of ／ of flexural strength 180N, have good cutting performance. Photoveel contains zirconia, bioram-M belongs to apatite base pottery and porcelain. 3, of commercialization of alumina pottery and porcelain but the alumina porcelain of cutting has VitaIn - Ceramspinell, VitaIn - CeramBindle and Rinke. But the In technology of CAD ／ CAM and tradition - Ceram technology is united in wedlock, use at clinical complete coronal to make: the alumina embryo system that becomes beforehand, treatment of technology of CAM of use CAD ／ forms rock-bottom coronal, press In next - Ceram technology undertakes glass is permeated, use ALPHA porcelain to restore tooth coronal finally appearance and beautiful. Vitain - Ceramspinell is pervious to light the gender is good, intensity a bit under In - Ceram, can use at the rehabilitate of anterior teeth complete coronal; In - the tooth after Ceram is advanced all can be used. Small equality of domestic a white horse with a black mane raised alumina glass complex system. The new technology that this kind of alumina porcelain uses not only the strength that increased pottery and porcelain and rupture tenacity, shortened the time that make, and made repair body facial expression is artistic, of the application that is technology of CAD ／ CAM and body of complete porcelain rehabilitate make offerred new approach. Additionally CAD/CAM machine uses pottery and porcelain, still include nitrogen to change Shapal-M of aluminous pottery and porcelain, nitrogen changes SNB-10 of silicon pottery and porcelain and Machinax of calcic silicon pottery and porcelain to wait. As a result of at present but the mechanical intensity of product of cutting pottery and porcelain is very low, it is mostly under 200MPa, together with processing technique still does not perfect modern plane, make consequently but cutting pottery and porcelain is in clinical the application that go up is restricted certainly. Be opposite at present but the research of cutting pottery and porcelain basically is increasing respect of sex of data strength He Ren centrally. CNC Milling