![Our Sources
[1] https://www.ncbi.nlm.nih.gov/m/pubmed/11469300
[2] Anantharaj A, Praveen P, Karthik V, Rani P, Krishnan MB. Bilateral Six Cusped And
three Rooted Mandibular 1st Permanent Molars. World Journal of
Dentistry. 2011;2(3):255–28.
[3] Ling JYK, Wong RWK. Molar Cusps in Southern Chinese. The Open Anthropology
Journal. 2010;3:16–19.
[4] www.ncbi.nlm.nih.gov
[5] Abdulbaset A. Mufadhal, Mohammed A. Aldawla and Ahmed A. Madfa (September 11th
2019). External and Internal Anatomy of Maxillary Permanent First Molars, Human Teeth -
Key Skills and Clinical Illustrations, Zühre Akarslan and Farid Bourzgui, IntechOpen.](https://image.slidesharecdn.com/variationsinmaxillarymolars-200417143914/85/Variations-in-maxillary-molars-14-320.jpg)
Variations in maxillary molars
- 1. Variations in Maxillary Molars Prepared By : Rawan Osama ,Hania Ashraf, NadaMohamed ,Sandra Wael Semester Two Under supervision of : A.Prof Samah Kamel
- 2. Upper first Maxillary Molar
- 3. Variation of the crown 1- TUBERCLE OF CARABELLI 2- ACCESSORY CUSP
- 4. ➢ Usually the maxillary first molar has 3 roots, 2 buccal and 1 palatal. ➢ There are 6% only who have four separated roots EROOTS
- 5. In very rare cases the maxillary first molar may be single rooted and may have 2 roots in other cases. Root Canals In some cases there maybe 2 root canals in one root. An abnormal case had 6 root canals.
- 6. upper second maxillary molar
- 7. Rare case Appearance of parastyle cusp o An accessory cusp on the buccal surface of the mesiobuccal cusp of maxillary molars. o Cusp-like pyramidal projection on the buccal surface of the mesiobuccal cusp, which had its base below the gingival margin and apex toward the occlusal surface of the tooth Anatomical variation in the crown : • Three cusp type with heart- shaped occlusal aspect resembling maxillary 3rd molar.
- 8. ROOTS: The standard configuration of maxillary second molars has been described to have three roots and either three or four canals, with the fourth canal usually being the second mesiobuccal (MB2) Variations: • (MB1) rarly has two canals . • The presence of two palatal roots is less than 3%. • The Presence of Fused roots . • Absence of roots .
- 9. 1st&2ndmaxillarymolars maybesinglerootedin veryrarecasesandmay has2rootinsomecases. COMMON VARIATION
- 10. Upper Maxillary First Molar
- 11. The wisdom tooth : Dentists may have some complications in treatment of 3rd molars due to : ● Difficulty in their access ● Their aberrant occlusal anatomy ● Different patterns of eruption ( 18-21) The anatomy of 3rd molars has been described as unpredictable
- 12. Heart shape type with 3 cusps Rhomboidal shape type with 4 cusps One cusp type ( peg shaped ) Congenitally missing IT MAY HAVE VARIATIONS OCCLUSALLY
- 13. Abnormalities : • 3 curved roots in different angulation. • The anatomy of root canal system recorded , 15 % of maxillary 3rd molars had 1 root, 32% had 2 roots , 45% had 3 roots and 7% had 4 roots . • Missing 3rd molars were more common in the maxilla on the right side. • May be completely erupted or partially.
- 14. Our Sources [1] https://www.ncbi.nlm.nih.gov/m/pubmed/11469300 [2] Anantharaj A, Praveen P, Karthik V, Rani P, Krishnan MB. Bilateral Six Cusped And three Rooted Mandibular 1st Permanent Molars. World Journal of Dentistry. 2011;2(3):255–28. [3] Ling JYK, Wong RWK. Molar Cusps in Southern Chinese. The Open Anthropology Journal. 2010;3:16–19. [4] www.ncbi.nlm.nih.gov [5] Abdulbaset A. Mufadhal, Mohammed A. Aldawla and Ahmed A. Madfa (September 11th 2019). External and Internal Anatomy of Maxillary Permanent First Molars, Human Teeth - Key Skills and Clinical Illustrations, Zühre Akarslan and Farid Bourzgui, IntechOpen.