• Technician production of restorations
(1) Fabrication of metal base crown
Mainly include the following steps: 1) Working model production: including nearly ten processes such as working model trimming and inserting nails; 2) Wax model production: including wax model stacking, cutting back, finishing, edge sealing, Processes such as making the holding handle wax model, inserting the sprue and the base; 3) wax embedding, casting, ring opening, sand blasting, try-on castings on the working model; 4) polishing; 5) the bonding surface of the base crown and porcelain Treatment: fine polishing, sandblasting, cleaning, oxidation. A total of nearly 30 procedures.
(2) Porcelain layer production
The porcelain layer generally includes three layers of opaque porcelain, dentin porcelain, and enamel porcelain, which need to be formed by using porcelain powder through multiple stacking and sintering.
(3) The metal porcelain crown is tried on, dyed and glazed on the model.