Depressions can also be found on the furcal side of the distobuccal and palatal roots.

The Distobuccal Root is generally rounded or ovoid in cross section and usually contains a single canal.

It is formed by the union of the distal cusp ridge of the mesiolingual cusp and the triangular ridge of the distobuccal cusp.

The distobuccal groove runs from the distal pit in the central groove distobuccally separating the distal and distobuccal cusps.

The first premolars and first molars should be assessed as to whether there is sufficient undercut on the mesiobuccal and distobuccal aspects of the teeth at the level of the gingivae.

Normally, maxillary molars have four lobes, two buccal and two lingual, which are named in the same manner as the cusps that represent them (mesiobuccal, distobuccal, mesiolingual, and distolingual lobes).

The buccal groove runs from the more mesial of the central pits in the central groove toward the buccal surface between the mesiobuccal and distobuccal cusps ending in the buccal pit.

This buccolingual shift correlates with a relative difference in size between the mesial and distal cusps on these teeth - the mesiolingual cusp is larger than the mesiobuccal cusp, but the distobuccal cusp is larger than the distolingual cusp.

Viewed from the top of the tooth (occlusal view), the mandibular first molar is pentagonal (five sided) in shape and tapers toward the lingual, with the sides being the buccal surface, the mesial surface, the lingual surface, distal surface, and the distobuccal surface.