Introduction of all-ceramic teeth
Because the inner crown is made of high-strength porcelain material similar to the color of teeth instead of metal, it is more beautiful than metal-based porcelain restoration, and its semi-permeability is similar to that of natural teeth. The restored gingival margin is more natural, which can achieve the simulation effect and has the advantage of no stimulation to surrounding tissues. At present, it has been widely used in clinic, especially in the aesthetic restoration of anterior teeth.
Classification of all-ceramic teeth
According to different materials, all-ceramic teeth can be divided into 1 and glass-ceramic all-ceramic teeth. Such as: hot die casting porcelain crown (Empress I, II and III generations), glass infiltrated porcelain crown, glass ceramic crown polished by CAD/CAM technology. 2. All-ceramic teeth made of alumina and zirconia, the inner crowns of alumina and zirconia are polished by CAD/CAM technology, and then the finished all-ceramic teeth or all-zirconium crowns without external decorative porcelain are made by layered porcelain stacking technology and external decorative porcelain.
Identification of all-ceramic teeth
Glass-ceramic all-ceramic teeth have beautiful color and translucent effect, but the shading effect and strength are slightly poor, which is more suitable for the restoration of single crown or short fixed bridge in the aesthetic area of anterior teeth. Alumina and zirconia all-ceramic teeth are durable and have good color masking effect. It is mainly suitable for the restoration of single crown and long fixed bridge in the posterior tooth area and the restoration of severely discolored teeth and metal post and core in the anterior tooth area. All-zirconium crown is mainly suitable for restoring chewing function in the functional area of posterior teeth.
Indications of all-ceramic teeth
1, repair discolored teeth (including moderate and severe tetracycline teeth and discolored teeth with dead pulp, etc. );
2. Repair tooth defect;
3. Repair enamel hypoplasia;
4. Repair dentition defect;
5, restore the contact point or occlusion relationship;
6. Repair irregular teeth and dislocated teeth;
7. Close the backlash;
8, planting repair, etc.
Prognosis of all-ceramic teeth
According to the literature, the long-term success rate of all-ceramic teeth is obviously lower than that of metal-based porcelain crowns (65438+85% in 2000). However, it has also been reported that the success rate of all-ceramic tooth restoration can reach 92-98% within five years. Matters needing attention of all-ceramic teeth