Porcelain Jacket Crown Write a short note on aluminous porcelain. Answer: Porcelain jacket crowns (PJC) were very brittle and fractured easily. The marginal adaptation was also quite poor. The “Mc Lean and Hughes” developed the PJC with an alumina-reinforced core in 1965. This crown was developed to improve the strength of earlier PJC. Aluminous porcelain is a … [Read more...] about Porcelain Jacket Crown
Types Of All-Ceramic Crowns
Types Of All-Ceramic Crowns Write a short note on all-ceramic restoration. Answer: All ceramic restorations are also known as metal-free ceramics. Metal-free ceramic restorations are made without a metallic core or sub-structure. This makes them esthetically superior to metal-ceramic restoration. Metal-free ceramic restorations had lower strength, thus, metal-ceramics … [Read more...] about Types Of All-Ceramic Crowns
Dental Porcelain
Dental Porcelain Write their composition and failure in porcelain restoration. Or Classify and describe composition along with role of each constituent. Answer: Composition Of Porcelain Restorations: Failures in Porcelain Restorations: It is susceptible to brittle fracture particularly when flow and tensile stress exist in the same region of ceramic … [Read more...] about Dental Porcelain
The Science Of Castable Ceramics: Materials, Fabrication, And Advantages
The Science Of Castable Ceramics: Materials, Fabrication, And Advantages Write a short note on castable ceramic. Answer: Composition Of Castable Ceramic: The first commercially available castable ceramic material for dental usage is decor which was named on the names of its manufacturers, i.e. Dentsply International and Corning Glass Works, it is supplied as silicon … [Read more...] about The Science Of Castable Ceramics: Materials, Fabrication, And Advantages
Methods Of Strengthening Dental Ceramics
Methods Of Strengthening Dental Ceramics Write in detail methods of strengthening ceramic. Or Write methods of strengthening dental ceramics Answer: Methods used for strengthening of dental ceramic are based on the following mechanism: Development of residual compressive stress: Ion exchange or chemical tempering Thermal tempering Thermal … [Read more...] about Methods Of Strengthening Dental Ceramics