A Complete Guide To The Primary Mandibular Second Molar

A Complete Guide To The Primary Mandibular Second Molar

Describe in detail about Primary Mandibular Second Molar.
Answer:

Primary Mandibular Second Molar Buccal aspect:

• It is wider at the cervical portion.
• Mesiobuccal and distobuccal developmental grooves divide the buccal surface into mesiobuccal, buccal, and distobuccal cusp.
• Roots appear slender and long.
• Roots flare mesiodistally at the middle and apical third.
• The point of bifurcation of the roots is just below the CEJ.

Primary Mandibular Second Molar Lingual aspect:

• Two equal cusps with a lingual groove between them are seen.
• The cervical line is relatively straight.
• A portion of each of the three buccal cusps may be seen. Roots appear slender and long.

Primary Mandibular Second Molar Mesial aspects:

• The tooth seems constricted occlusal. The lingual cusp is longer.
• The cervical line is regular.
• The mesial root is broad and flat.

Primary Mandibular Second Molar Distal aspect:

• Mesiobuccal and distobuccal cusps are seen distolingual cusp appears well developed.
• The triangular ridge extends from the distolingual cusp tip to the distal marginal ridge.
• The cervical line of the crown is regular.
• The distal root is broad and flat and tapers more at the apical end.

Primary Mandibular Second Molar Occlusal aspect:

• It is somewhat rectangular.
• Buccal cusps are the same in size, while both lingual cusps are equal.
• Well-defined triangular ridges are seen.
• The occlusal surface shows.
• Mesial triangular fossa.
• Inside the mesial marginal ridge.
• Distal triangular fossa.
• Mesial to the distal marginal ridge.
• Central developmental groove.
• Extends from mesial triangular fossa to distal triangular fossa.
• Two buccal grooves-mesial and distal.
• Lingual developmental groove.
• Supplemental grooves.
• Seen over slopes of triangular ridges and in mesial and distal triangular fossae.
• The mesial marginal ridge is well developed.
• Crown converge distally.