class 1

triangular fossa, triangular ridges, and

developmental grooves

The outline form of a Class I tooth preparation

for posterior teeth is based on the placement

of preparation of 3 anatomic structures:

DOVETAIL

It should be included because of the presence

of pits and fissures, with or without defect

because of the principle of extension for

prevention

triangular space

Fissures are buccal and lingual fissures that

forms the

1.6 mm

Marginal ridge left should be greater than or

equal to

one triangular

ridge, and 2 slope

In one cusp there are 3 ridges:

1.5 mm width

Isthmus should have a bulk of

2

maximum dove tail

mandibular second

premolar

Premolars except _____ only have central groove

grooves

You should stop at ______, because it is not

a candidate for cariogenic bacteria to

accumulate. It is self-cleansing.

resistance

For _____, it should be flat pulpal floor

and walls are converging wall but not all walls

Punch cut

Insert flat end

cylinder diamond point at a

proper angulation at an

initial depth of 1.5 mm in the

distal/mesial pit

Axial wall

Rule of lateral wall of dovetail: _____

should follow the contour of the external tooth

surface