Molars Flashcards
Maxillary Molars: General
Most posterior. Largest in dentition (1st>2nd>3rd). Non-succedaneous. Grind. 3 roots. 4-5 cusps.
Wider buccolingually than mesiodistally!
Shorter occlusocervically than anteriors.
1st Maxillary Molars: Cusps
5 total: MB, ML(largest), DB, DL(smallest) + Cusp of carabelli
Landmarks of malocclusion
MB cusp on maxillary 1st molars.
MB groove on mandibular 1st molars.
Cusp of Carabelli
Commonly arises from ML cusp, maxillary 1st molar, nonfunctional cusp
Oblique Ridge
Unique transverse ridge on maxillary 1st molars > ML-DB cusp
Maxillary Molars: Roots
(3) Palatal, Mesiobuccal, Distobuccal
1st Maxillary Molars: Furcations
Buccal: 4mm centered
Mesial: 3mm off-centered
Distal: 5mm perio disease
2nd Maxillary Molars: #’s
2, #15
2nd Maxillary Molars: Cusps
(4) MB, ML, DB, DL
More variation, 2 shapes: rhomboid or heart.
2nd Maxillary Molars: Roots
Smaller and closer together than 1st, narrower furcations
3rd Maxillary Molars: #’s
1, #16
3rd Maxillary Molars: Crown
Varies, smaller, heart-shaped, 3 functional cusps (DL small or missing)
3rd Maxillary Molars: Variations
20% congenitally missing. Impaction (~dentigerous cyst). Peg 3rd molar. Accessory roots. Fused roots.
Maxillary Molars: Clinical Considerations
Sinuses. Lingual pits (caries). Concrescence. Occlusion development.
Loss complications: drift, super-eruption.
Mandibular Molars: General
Non-succedaneous. 2 roots, M>D. Wider MD.
1st Mandibular Molars: Crown
5 cusps: MB(largest), DB, D(smallest), ML, DL. No transverse ridges.
Has MB, DB and Lingual grooves.
*MB groove tends to end in pit (decay!)
Zig zag central groove.
1st Mandibular Molars: Roots + Furcations
Mesial (2 canals), Distal (1 canal).
Furcations concavities.
1st Mandibular Molars: Furcations
Buccal: 3mm
Lingual: 4mm
2nd Mandibular Molars: Antagonists
18(14/15)
31(2/3)
2nd Mandibular Molars: Crown
4 cusps, MB largest. Cross shaped groove pattern: MB-ML, DB-DL.
2nd Mandibular Molars: Roots
2 roots, M+D. Closer together than 1st.
3rd Mandibular Molars: Variations
Anodontia, accessory roots, dentigerous cyst, impaction, partial eruption, Operculum (flap), perio disease + pericoronitis
Mandibular Molars: Clinical Considerations
Ludwigs Angina- cellulitis infection, can spread and impact breathing
Mulberry Molars, Enamel Pearls, Dilacerarion
ALL MOLARS HOC
Buccal: cervical
Lingual: middle
Maxillary Molars: Contacts
Mesial: middle (1st occlusal/middle)
Distal: middle
Mandibular Molars: Contacts
Mesial: occlusal/middle
Distal: occlusal/middle