Pediatric+Class+I+Restoration

External outline

 * Isthmus width should be 1/3 the intercuspal distance to provide sufficient room for a small condenser to be placed in the preparation
 * In primary teeth with a traverse ridge (# A, J, L, S), do not cross the transverse ridge when preparing the occlusal surface. In clinic cross ridge if decay present.
 * The cavosurface angle should be 90 degrees, and is not beveled

Internal Outline

 * The walls of the preparation are parallel to the long axis of the tooth with a slight convergence towards the occlusal surface created by the pear-shaped 330 bur.
 * Occasionally defective pits and fissures run close to marginal ridges or to the buccal or lingual sides of teeth. Complete fissure removal would result in undermining, thus tip the 330 bur, in marginal ridge areas to prepare a divergent ("flared") wall. The cavosurface angle should be 90 0, and is not beveled

Pulpal floor

 * Pulpal depth should be .5 mm into dentin.

Buccal Pit preparation

 * Preparation has a "tear-drop" shape (base towards the cervical).
 * Preparation centered in the defect.
 * Preparation extended to the D.E.J. to include caries and unsupported enamel.