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TOOTH MORPHOLOGY 2
- MANDIB 1ST INCISOR
- smallest of perm incisors
- straight incisal edge
- Lingual surface concave
- Single root with distal curvature
- Mesial and distal grooves
- smallest of perm incisors
- MANDIB 2ND INCISOR
- Slightly larger than central
- Single root
- Distal angle tends to be more curved
- Long axis of the root is angled distally in relation to the long axis of the crown
- Crown sits slightly askew on its root
- Slightly larger than central
- MANDIB PERM CANINE
- Smaller less well developed than upper
- Single root flattened mesiodistally, sometimes has 2 canals
- Distal slope longer than mesial
- Poorly developed cingulum
- Smaller less well developed than upper
- MANDIB 1ST PREMOLAR
- Single root flattened mesially
- Large buccal cusp and small lingual cusp
- Occ surface slopes lingually
- 2 fossae distal larger than mesial
- Mesiolingual groove
- Single root flattened mesially
- MANDIB 2ND PREMOLAR
- larger crown than 1st
- cusps more equal in size and less pointed, usually 3 cusps
- 2 fossae
- single root
- occ outline more square
- mesial slope of buccal cusp shorter than distal
- larger crown than 1st
- MANDIB 1ST MOLAR
- 5 cusps - 3 buccal and 2 lingual
- Bulbous, lingually inclined buccal surface
- 2 grooves - buccal and lingual
- Buccal grooves ends in a pit (Foramen Caecum molarum) caries risk
- Largest mandib tooth
- Oblong occ outline
- 2 roots
- 5 cusps - 3 buccal and 2 lingual
- MANDIB 2ND MOLAR
- 2 roots similar to 1st - sometimes fused
- Rounded square occ outline
- 4 cusps - 2 ling 2 buccal
- Cruciform shaped fissure
- buccal groove
- Lingual cusps higher than buccal
- 2 roots similar to 1st - sometimes fused
- MANDIB 3RD MOLAR
- Crown form similar to above but smaller
- 2 roots- short,underdeveloped, often fused
- square occ outline
- inclined lingually
- 4 cusps
- Crown form similar to above but smaller
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