Variation in maxillary molars
- 1. Variation in maxillary permanent molars Done by : Salma ahmed khatab ,Omar mahmoud fadl, Mennatalla hatem ,Noah mustafa noah Semester Two Under supervision of : A.Prof Samah Kamel
- 2. Variations in the morphological feature of maxillary molars 1)Accessory cusps: Human dentition shows a high variation in the morphology, both in primary and permanent dentitions. The variations in the tooth morphology may be clinically seen as an accessory cusp or in a number of root and root canal .
- 3. A parastyle/paramolar cusp/paramolar tubercle is an accessory cusp on the buccal surface of the mesiobuccal cusp of maxillary molars. It is considered as a cingulum derivative expressed usually on the buccal surface of the paracone of the upper molars and rarely on the metacone of the upper molars.
- 4. Abnormalities of number of roots in maxillary molars
- 5. Maxillary first molar a) Variation in the root shape {fig 5}
- 6. The incidence of second MB canal has been reported between (18%) and (96.1%) 01 02 03 04 “Ruiz badanelli” reported a max. first molar with 6 root canals 3 MB, 2 DB and 1 palatal “Kattoor” reported for the first time a maxillary first molar with 7 root canal 3 MB , 2 DB and 2 palatal b)variation in the root canal:- “Thomas” reported the incidence of 2 canals in the DB (1.9%) and
- 7. 05 06 07 08 b)variation in the root canal :- It is reported the incidence of 2 root canals in the palatal with (2%) and (5.1%) It is reported the incidence of 5 root canals 2 MB ,2 DB and 1 palatal C -shaped root canal It is also reported of the presence of o-shaped root as a result of fusion of MB, DB and palatal root all together.
- 8. ● Variation in the number or morphology of roots is challenging and may lead to failure of the root canal treatment if not Recognized. ● number of roots from 2-5 but It is common for the maxillary second molar to have three roots with three or four canals, but it is rare to have four separated roots. a) variation in the root :- Maxillary second molar
- 9. b)variation in the root canal :- 1-three separate roots and three separate canals (56.9%). 2-three separate roots and four canals (two in the mesiobuccal root) (22.7%). 3-three roots and canals whose mesiobuccal and distobuccal canals combine to form a common buccal with a separate palatal (9%).
- 10. 4- two separate roots with a single canal in each (6.9%) 5- one main root and canal (3.1%). 6- four separate roots and four separate canals including two palatal (1.4%).
- 11. ● The root and root canal morphology of maxillary third molars show an increase either in the number of roots or the canal configuration. ● The number of roots in maxillary third molar teeth ranges from 1 to 5 and the number of encased root canal has been reported from 1 to 6. a)variation in the root :- Maxillary third molar
- 12. 1-Maxillary third molar 2 root variation 2-Maxillary third molar 4 root variation 3-Maxillary third molar 5 root variation
- 13. , Variation in the root canal :- Type I.(1-1) Type II (2-1) Type III.(1-2-1) Type IV (2-2) Type V (1-2) Type VIII (3-3)