Page 30 - My FlipBook

26 OPERATIVE DENTISTRY
labio-lingual aiigie, but for convenience this is named the "incisal-
line angle."
A point angle is formed Avhere three walls of a cavity meet at

A B
l"ig. 10.— liisccted molar in which a mesial Class Two cavity has been cut and line angles
indicated. The line angles are: a, Gin.2;ivo-buccal ; b, Gingivo-lingual; c, Gingivo-axial; d,
A.xio-bucca! ; e, Axio-lingnal /. Axio-pulpal; g, Pulpo-buccal; h, Pulpo-lingual; i, Pulpo distal;
;
/, Disto-buccal; k, Disto-lingual.

A B
Fig. 11.—Bisected molar in which a mesial Class Two cavity has been cut and point angles
indicated. The point angles are: a, Gingivo-axio-buccal ; b, Gingivo-axio-lingual; d, Pulpo-disto-
lingual; e, Pulpo-disto-buccal.
a point and is named by joining the names of the Avails so meeting.
There is hut one exception to tliis rule. The point of junction of