FREEDOM OF DISPLACEMENT

numbers of paths along

removed

Retention is improved by geometrically limiting the _which a restoration can be _ from the tooth preparation

only one path

Maximum retention is achieved when there is _.

long

parallel

retention

A full veneer preparation with_, _ axial walls and grooves would produce such _

retention

removed

infinite number

short, overtapered preparation will not have _ because the restoration could be_ along an _ of paths

axial wall

oblique angle

resistance

A groove whose walls meet the _at an_ does not provide the necessary _

proximal box

resistance

rotating forces

A _ must be treated in a similar manner. If its facial and lingual walls form oblique angles with its pulpal wall, there will not be adequate _to _

pulpal wall

90 degrees

perpendicular

forces

The facial and lingual walls must meet the_ at angles near_ so that these walls will be _ to any _ that would tend to rotate the restoration