MDS AIPGDEE preparations B-IDS | guiding (nonsupporting) cusp MCQ

An example of a guiding (nonsupporting) cusp is:
a. distolingual of #30
b. mesiobuccal of #18
c. distolingual of #14
d. lingual of #5

Ans. A. Note that the holding (supporting, occluding) cusps of the posterior dentition are the lingual (palatal) cusps of the maxillary teeth and the buccal (facial) cusps of the mandibular teeth. Buccals of maxillary teeth and linguals of mandibular teeth are guiding cusps. distolingual of #30 is the lingual of a mandibular first molar, so it is not a holding cusp, and is a guiding cusp. mesiobuccal of #18 is a buccal of a mandibular molar and is a holding cusp. distolingual of #14 is a lingual cusp of a maxillary molar and is a holding cusp. lingual of #5 is the lingual of a maxillary premolar and is a holding cusp.