Both roots are wider misiodistally at the buccal surgace than they are lingually. ![]() The apex is more pointed and is located below or distal to the distal contact area of the crown. The distal outline of the mesial root is concave from the bifurcation of the trunk to the apex. The mesial root curves mesially from a point shortlyīelow the cervical line to the middle third, then curves distally to tapered apex which is located below the mesiobuccal cusp.The mesiobuccal cusp is the widest mesiodistally and the distobuccal cusp, is less wide. The buccal cusps are flat with less curved ridge (which is characteristic for madnibular moral).The distal ouline is more convex in the occlusal portion than the mesial outline, and straight from the cervical line to the distal contact area which is near the crown centre cervico-occlusallu.Is located at the junction of the occlusal and middle thirds. The mesial outline of the crown is convex in the occlusal third to the contact area and becomes concave to the cervical line.The cervical line is regular in outline and curved root wise. The cervical ridge is a heavy mesiodistal ridge along thte cercival thir of the surface.It has its terminus near the cervical third of the crown. This distobuccal development groove is longer than the otherĪnd separates the the distobuccal cusp from the distal cusp from the distal cusp.It originates from the occlusal and extends onto the buccal surface of the crown ending with a pit. The mesiobuccal developmental groove which demarcates the mesiobuccalĬusp from the distobuccal cusp is situated a little mesial to the root bifurcation.The developmental grooves appear on the crown. The five cuspsĪr in view from this aspect (the two buccal cusps, the buccal portion of the distal cusp and the tips of the two lingual cusps). It is wider mesiodistally than occlusocervically. The outline is trapezoid with the long side occlusally.Root originated lingual and adjacent to the mesial root. The most abnormal finding is to see a thin slender long The roots are widely separated at the aspices. It has two well developed roots, one mesial and one distal which are very buccolingually. With little or no distobuccal developmental groove. ![]() Occasionally four cuspid first molar is formed with the distobuccal and distal cusp0s fused ![]() It has five well-developed cusps, two buccal two lingual and distal cusp, so it is formed of five lobes. It is the largest tooth in the mandibular arch.
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