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 restoration.
- If an adequate shoulder margin is not present mainly in anterior teeth, achieving the aesthetic margin without a dark shadow of metal is difficult.
- Metal base can affect the aesthetic of porcelain which makes its appearance unnatural because of decreased light transmission.
- Porcelain shows high degree of shrinkage on firing.
- In porcelain, there are problems in matching the exact color and texture of natural tooth.
Leave a Reply