Test 2 (Molars) Hard Flashcards
List 6 crown features and 2 root features of the maxillary 1st molar.
- Largest Crown in max molars
- Palatal Aspect has an Occlusal Palatine groove (term pit)
- Buccal Aspect has a buccal groove (term fossa)
- Mesial Marginal Ridge is longer then Distal Marginal Ridge
5.Oblique Ridge from Distobuccal cusp to mesiopalatal cusp - Cusp of Carabelli (on Mesiopalatal cusp, mid to occlusal 1/3)
- Mesio palatal cusp is taller than distopalatal
- 2 buccal 1 palatal root
- Mesiobuccal root is broader bucco-palatally than distobuccal
- Distobuccal root is conically shapped
Buccal cusps are shorter than the palatal cusps
Palatal root is longer than buccal roots
What are similarities and differences between the max 1st and max 2nd molars?
Diff:
Distopalatal cusp is signficiantly smaller than Max 1 Molar
Max 2 Molar has steeper cuspal inclines (shaper cusps)
M2M has more supplementary grooves
M2M is smaller, less divergent roots,
Sim:
Both have oblique ridge and OP groove
Both have 4 cusps and 3 roots
Mesiopalatal is the largest Cusp
What are 5 features of a Max 3rd Molar?
Lots of supplemental grooves
Crown is usually smaller and triangular (mimics M2M)
Shorter/fused roots
Distal inclines on all roots
Mesial Aspect is straighter
List 4 crown features and 3 root features of the maxillary 1st molar.
- Generally 5 cusps; can have 4 (-distal) or 6 (+distolingual)
Mesiobuccal, Distobuccal, Distal, Mesiolingual, Distolingual
- Distobuccal developmental groove (shorter) & Mid Buccal Groove
- Lingual Developmental Groove (no pit term)
- Lingual Cusps are about equal height
- 2 roots, 1 mesial 1 distal
- mesial root is broader and longer than distal root
- distal root is shorter and conically shaped
- divergent roots
What are similarities and differences between the mandibular 1st and mandibular 2nd molars?
diff:
1) Smaller Crown (mesiodistally)
2) More supplementary grooves
3) less digervent roots and smaller roots
4) Cruciate/Hot-Cross-Bun cusp pattern
5) Buccal groove (term pit)
6) Distal aspect is more convex
7) Mesiolingual cusp is slightly higher than distal
sim:
1) both have 3 occlusal pits
2) mesio root is broader, distal root is smaller
Difference between primary and perm central incisors? 3pts
Central:
-Primary is wider (M-D)
- Primary is more curved (curvature of cusps)
-Primary is shorter (C-O)
- Cervico-constriction
Describe the primary Mand 1st Molar (5pts)
- 2 distinct buccal cusp with mesiobuccal cusp larger
- Mesiobuccal bulge
- crown height is greater on mesial aspect
- CEJ extends cervically at mesial aspect
- two root canals and 3 pulp horns
Describe the primary Maxillary 1st Molar (5pts)
- 2 major cusps (mesio buccal and mesio palatal)
-very small disto-lingual cusp (disto-palatal), sometimes not present
-Longest and sharpest mesio-palatal cusp - Occlusal mesial pits linked by development groove
- bulge on cervial region of mesiobuccal cusp
List some features of the primary canines? (10 pts)
- Max Prim longer and sharper cusp compared to perm Max
- Max Mesial Slope > Max Distal Slope
- Max 2 shallow fossa
- Max Cingulum (well developed) and enamel ridge
-Man smaller crown and root measurement compared to max
- Thicker cervical region compared to max
- Man Distal Slope > Max Distal Slope
- Less defined lingual fossa
Features of Mandibular 2nd Molar for Primary Dentition compared to Mandibular 1st Molar (PD)?
- Resembles mandibular 1st molar (perm)
- Mesiobuccal, distobuccal developemental grooves
- 5 cusp
- Larger that mand 1st
- Bulge near cervical margin on lingual aspect
Features of Maxillary 2nd Molar (primary)? How does it compare with maxillary first (primary)?
- Resembles the Maxillary 1st perm molar
- Occlusal palatal grove
- Disto-palatal cusp more pronounced
- Oblique ridge
- Cusps inclined occlusally
- Cervical constriction
- Small occlusal table (cusps inclined occlusally)
