28-02-2013, 02:12 PM
principle of preparation of different crown & bridge retainer
principle of preparation.pptx (Size: 796.86 KB / Downloads: 41)
Tooth preparation
The selected form given toa natural tooth when it is reduced by instrumentation to receive a prosthesis (e.g artificial crown or a retainer
for a fixed or removable
prosthesis).
The selection of the form is guided by clinical circumstances and physical properties of the
materials that make up the
prosthesis.
Principle of crown preparation:
*preservation of tooth structure
*retention & resistance form
*Structural durability of the restoration
*Marginal integrity
*Preservation of periodontium