Bio-Mechanical Principles of Tooth Preparation

prevention of tooth damage during preparation

adjacent tooth

soft tissue

pulp

causes of injury during preparation

temperature

chemical

bacterial

preservation of tooth structure

guidelines

Consideration affecting future dental health

axial reduction

margin placement

advantages of supragingival margins placement

marginal integrity

marginal adaptation

margin configuration

chamfer

beveled

radial shoulder

sloped shoulder

shoulder with bevel

retention and resistance

retention form

path of insertion

factors affecting retention form

geometry of preparation

taper and retention

surface area

stress concentration

roughness of surface being cemented

material being cemented

type of luting cement

resistance form

tipping path

situations where subgingival margin is unavoidable