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Tooth Morphology > Features > Flashcards

Features Flashcards

1
Q

What features do Permanent Maxillary Incisors (both Centrals and Laterals) have in common?

A
  • *Sharp mesio-incisal angle.
  • *Rounded disto-incisal angle.
  • Smooth convex labial.
  • Well developed cingulum.
  • Shovel-shaped palatal.
  • Mammelons on eruption (get worn down over time).
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2
Q

What features do Permanent Maxillary Central Incisors have that Laterals do not?

A
  • *Largest Incisors.
  • *Straight incisal edge.
  • Widest anterior teeth.
  • Root straighter but still distally inclined
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3
Q

What features do Permanent Maxillary Lateral Incisors have that Centrals do not?

A
  • *Incisal edge sloped towards distal.
  • *More likely to have developmental pits on palatal.
  • Smaller and shorter.
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4
Q

What features do Permanent Mandibular Incisors (both Centrals and Laterals) have in common?

A
  • Smooth convex labial surface.
  • Straight Incisal edge.
  • Mammelons on eruption (get worn down over time).
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5
Q

What features do Permanent Mandibular Central Incisors have that Laterals do not?

A
  • *Smallest Permanent teeth.
  • *Symmetrical (more parallel).
  • Disto-incisal (DI) edge more rounded, mesio-incisal (MI) edge more sharp.
  • Smaller cingulum.
  • Root narrow mesially-distally, wide labially-lingually.
  • Only slight curvature to the distal.
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6
Q

What features do Permanent Mandibular Lateral Incisors have that Centrals do not?

A
  • *Fan-shaped mesially-distally.
  • *Cingulum is more distally placed.
  • Slightly larger than Mandibular Centrals.
  • Incisal edge NOT at right angles.
  • Crown appears twisted on the root.
  • More distally inclined.
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7
Q

What features do Permanent Maxillary Canines have?

A
  • *Longest teeth.
  • Pentagonal Crown outline.
  • Single, pointed cusp in line with root.
  • Distal slope longer than mesial.
  • Long, single root.
  • More symmetrical than Mandibular Canine.
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8
Q

What features do Permanent Mandibular Canines have?

A
  • *Lingual fossa less pronounced than Maxillary Canine.
  • Less bulky than Maxillary Canine.
  • Pentagonal Crown outline.
  • Distal sweep.
  • Disto-incisal (DI) ridge longer than mesio-incisal (MI) ridge.
  • Labial ridge not as prominent as Maxillary Canine.
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9
Q

What features do Permanent Maxillary Premolars (both 1st’s and 2nd’s) have in common?

A
  • *Narrow mesially-distally.
  • *Buccal wider than palatal.
  • Buccal and palatal cusp.
  • Smaller than Molars.
  • Buccal and Palatal Crown convex.
  • Difficult to tell apart by Crown only.
  • Similar pit and fissure patterns.
  • Situated between Canine and 1st Molar.
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10
Q

What features do Permanent Maxillary 1st Premolars have that 2nd’s do not?

A
  • *Buccal cusp higher than palatal cusp.
  • *Roots fused and partially bifurcated.
  • *Has a mesial marginal ridge (MR) fissure/groove.
  • *Mesial margin is concave to fit Canine.
  • *Heart-shaped.
  • Pentagonal Crown outline (sharp).
  • Buccal more angular and wider.
  • Incisal slope towards mesial shorter than distal.
  • Occlusal line angles sharper.
  • Palatal cusp tilts slightly towards mesial.
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11
Q

What features do Permanent Maxillary 2nd Premolars have that 1st’s do not?

A
  • *Buccal and palatal cusps closer in height.
  • *Single root.
  • *Occlusal line angles more rounded.
  • *Palatal cusp more central.
  • Crown slightly smaller.
  • More rounded from Buccal aspect.
  • NO marginal ridge (MR) fissure/groove.
  • Mesial and distal pits closer to middle of occlusal table.
  • Mesial and distal margins straighter.
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12
Q

What features do Permanent Mandibular Premolars (both 1st’s and 2nd’s) have in common?

A
  • *Occlusal surface lingually inclined.
  • *Buccal surface visible from occlusal aspect.
  • Crown shorter in height compared to Anterior teeth.
  • Smaller than Molars.
  • Situated between Molar and Canine.
  • Occlusal pits and fissures.
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13
Q

What features do Permanent Mandibular 1st Premolars have that 2nd’s do not?

A
  • *Short, non-functioning Lingual cusp (can look like cingulum).

-Sharp buccal cusp.
- Mesial cusp ridge shorter than distal.
- Smaller than 2nd’s.

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14
Q

What features do Permanent Mandibular 2nd Premolars have that 1st’s do not?

A
  • *Lingual cusp(s) well developed.
  • *Can have Y, U or H shaped fissure pattern.
  • Can have 2 or 3 cusps (1 buccal, 1 or 2 lingual).
  • Larger, more defined and squarer than 1st’s.
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15
Q

What features do Permanent Maxillary 1st Molars have?

A
  • *Largest teeth in Maxillary jaw.
  • *5 cusps including Cusp of Carbelli on mesio-palatal (MP) cusp.
  • *Oblique (OB) ridge on distal aspect of occlusal surface.
  • *3 roots (2 buccal, 1 palatal).

-Rhommboidal shape.
- MP cusp largest.
- Occlusal-palatal (OP) fissure distal of OB ridge.
- Mesial-occlusal fissure mesial of OB ridge.
- Roots are more flared.

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16
Q

What features do Permanent Mandibular 1st Molars have?

A
  • *Occlusal plane lingually inclined (to avoid cheek biting), buccal surface visible from occlusal aspect.
  • *Largest teeth in Mandibular jaw.
  • *5 cusps (3 buccal, 2 lingual).
  • *2 roots (mesial and distal).
  • Pentagonal shape.
  • Disto-occ pit, mid-occ pit, mesio-occ pit and buccal pit.
  • Occlusal fissure.
  • 2 occ-buccal fissures, mesio-buccal (MB) fissure and disto-buccal (DB) fissure.
  • 1 occ-lingual fissure.
  • Mesial and distal marginal ridges (MR).
  • Accessory grooves.
17
Q

What features do Permanent Maxillary 2nd Molars have?

A
  • *Similar but smaller than 1st Molars.
  • *More heart-shaped.
  • *4 cusps (NO carabelli)
  • *3 roots (2 buccal, 1 palatal).
  • Less anatomically defined.
  • Smaller disto-palatal (DP) cusp than 1st Molars.
  • Oblique (OB) ridge more distal as DP cusp is smaller.
  • More ‘squished’ looking.
  • Roots are straighter and closer together.
18
Q

What features do Permanent Mandibular 2nd Molars have?

A
  • *Occlusal plane lingually inclined (to avoid cheek biting), buccal surface visible from occlusal aspect.
  • *Smaller than 1st Molars.
  • *4 cusps (2 buccal, 2 lingual).
  • *2 roots (mesial and distal).
  • More symmetrical and rectangular shaped than 1st Molars.
  • Smaller.
  • Disto-occ pit, mid-occ pit, mesio-occ pit and buccal pit.
  • No distal cusp.
  • Cross-shaped fissure pattern.
  • Mesial and distal marginal ridges (MR).
  • Accessory grooves.
  • Roots more distally inclined, shorter and closer together than 1st Molars.
19
Q

What differences in features do the Primary Maxillary Incisors (both Centrals and Laterals) have?

A

Centrals:
- Crown wider and larger.
- Disto-incisal (DI) edge curved, but not as much as lateral.
- Root wider and longer.

Laterals:
- Crown narrower.
- DI more curved.
- Root narrower and longer.

20
Q

What features do Primary Mandibular Central Incisors have?

A
  • *Smallest teeth in the mouth.
  • *More symmetrical than laterals.
  • Cingulum less defined than Maxillary Centrals.
  • Root shorter than lateral.
21
Q

What features do Primary Mandibular Lateral Incisors have?

A
  • Disto-incisal (DI) corner more rounded.
  • Incisal edge sloped towards distal.
  • Crown more ‘fan’ shaped.
  • Root longer than Centrals and more distally inclined.
22
Q

What features do Primary Maxillary Canines have?

A
23
Q

What features do Primary Mandibular Canines have?

A

Tooth Morphology (2 decks)

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