tooth preparation terminology

Question 1

what is the internal wall

Answer 1

the prepared surface that does not extend to the external tooth surface

Question 2

axial wall

Answer 2

the internal wall parallel to the long axis of the tooth

Question 3

pulpal wall

Answer 3

the internal wall that is perpendicular to the long axis of the tooth and occlusal of the pulp

Question 4

external wall

Answer 4

the prepared surface that extends to the external tooth surface. Such a wall takes the name of the tooth surface or aspect that the wall is adjacent to

Question 5

floor

Answer 5

the prepared wall that is reasonaby horizontal and perpendicular to the occlusal forces that are directed occlusogingivally

Question 6

enamel wall

Answer 6

the portion of a prepared external wall consisting of enamel

Question 7

dentinal wall

Answer 7

the portion of a prepared external wall consisting of dentine, in which mechanical retention features may be located

Question 8

line angle

Answer 8

junction of two planar surfaces of different orientation along a line.

Question 9

internal line angle

Answer 9

the line angle whose apex points into the tooth.

Question 10

external line angle

Answer 10

line angle whose apex points away from the tooth

Question 11

cavosurface angle

Answer 11

angle of tooth structure formed by the junction of a prepared wall and the external surface of the tooth. The actual junction is referred to as cavosurface margin. The cavosurface angle may differ with the location on the tooth, the direction of the enamel rods on the prepared wall, or the type of restorative material to be used.