101DLT_9_ManMolars

Dr. RaDr. Ra’’ed Aled Al--SadhanSadhan

Ra’ed Al-Sadhan

Descriptive Anatomy ofPermanent Mandibular Molars

• It has two roots (mesial and distal).• Five cusps (3 buccal and 2 lingual).•The lingual cusps are of equal sizes.•The crown is wider M-D than B-L.

MB DB

D

DLML

Ra’ed Al-Sadhan

Permanent Mandibular First Molar

Buccal Surface� Widest M-D diameter.� Three cusps: MB, DB and D.� Two buccal grooves.� Buccal pit.

M DMB DB D

Ra’ed Al-Sadhan

Permanent Mandibular First Molar

Lingual Surface� Buccal profile and proximal surfaces

visible.� Short lingual groove.

MD

Ra’ed Al-Sadhan

Permanent Mandibular First Molar

Occlusal Surface� Has a pentagonal outline.� Main grooves form Y pattern

Ra’ed Al-Sadhan

Permanent Mandibular First Molar

• It has two roots (mesial and distal).• Four cusps (2 buccal and 2 lingual).•The lingual cusps are of equal sizes.•The crown is wider M-D than B-L.

Ra’ed Al-Sadhan

Permanent Mandibular Second Molar

Buccal Surface� Two buccal cusps (MB & DB).� One buccal groove.

M D

Ra’ed Al-Sadhan

Permanent Mandibular Second Molar

Lingual Surface� Buccal profile and proximal surfaces

NOT visible.

MD

Ra’ed Al-Sadhan

Permanent Mandibular Second Molar

Occlusal Surface� Rectangular outline.� Main grooves form a + pattern.

Ra’ed Al-Sadhan

Permanent Mandibular Second Molar

• Smallest crown.• Variable morphology. Ra’ed Al-Sadhan

Permanent Mandibular Third Molar

Buccal Surface� Similar to 2nd molar.� Distal inclination of the roots.

M D

Ra’ed Al-Sadhan

Permanent Mandibular Third Molar

Lingual Surface� Similar to 2nd molar.

MD

Ra’ed Al-Sadhan

Permanent Mandibular Third Molar

Occlusal Surface� Ovoid outline.

Ra’ed Al-Sadhan

Permanent Mandibular Third Molar