What is the best material for the crown of the front teeth?

The crown is generally the first thing to consider aesthetically pleasing, so the method and material chosen must meet the requirements of aesthetic commonly used materials plastic and ceramic. In addition, there are enamel porcelain, vitreous china and other new materials. Plastic has photosensitive resin, self-curing resin, heat-curing resin. The class of the crown of the front teeth are: (1) plastic full crown. Can make photosensitive resin, or self-coagulating resin bonded tooth piece, heat curing nail crown. Photosensitive resin can be shaped directly in the mouth, light curing. The operation is simple, tooth preparation requirements are low, the operation is completed quickly. The disadvantage is that the form requires high skill, long time, and the patient has pigmentation. Self-coagulating resin bonded veneer, simple operation, veneer form is also better, but the veneer is easy to fall off when biting food, the polymerization of self-coagulating resin is incomplete, easy to deposit odor. Heat curing nail crown form is good, the polymerization is complete, can be polished better, after bonding has a more ideal effect, but there is also the problem of dismantling cracks. (2) Porcelain crown: porcelain or cast glass ceramic materials made of full crown restorations. Porcelain full crown of good color, texture similar to natural teeth, but porcelain hardness, brittle, easy to break. Casting ceramics, the inner layer of its crown is cast. Then porcelainized, its effect is better. The inner layer has high strength and is not easily damaged. (3) Porcelain fused to metal full crown: is currently the more commonly used clinical repair methods. The outer layer of porcelain color is good, texture, hardness are in line with the requirements, the inner layer of metal crown high strength, forming a composite. It is a more ideal repair method.