cavity nomenclature

Question 1

describe the cavity margin

Answer 1

junction between walls of cavity prep and external surface of tooth

Question 2

describe the Cavo-surface margin angle

Answer 2

the angle formed at any point on the junction of preparation with unprepared surface of tooth
90* in amalgam but 60-120 acceptable

Question 3

describe the line angles

Answer 3

line formed by the junction of two surfaces of a prepared or unprepared surface

Question 4

describe the point angles

Answer 4

angle formed by the junction of three surfaces

Question 5

describe the occlusal/pulpal floor

Answer 5

the surface which is parallel to occlusal plane and overlies the pulp

Question 6

describe the gingival floor

Answer 6

cavity surface in approximate cavity which is approximately parallel to occlusal plane and bounded externally by gingival margin

Question 7

describe the pulpal axial wall

Answer 7

axial wall is cavity surface which is parallel to long axis of tooth

Question 8

describe the buccal/lingual axial wall

Answer 8

cavity wall is the cavity surface which is bounded by the cavo-surface angle and the cavity floor

Question 9

describe the isthmus

Answer 9

least wide part of the cavity proximo-occlusally for retention