Maxillary second molar

Maxillary second permanent molar

1. Maxillary molars Menatalla M Elhindawy

2. Welcome back To the 2 nd lecture

3. Maxillary Second Molar

4. Where is it?

5. Is it a successor??

6. Maxillary 2 nd molar Chronology Tooth aspects Buccal Palatal Mesial Distal Occlusal In Our Life Variations & Anomalies

7. Maxillary 2 nd molar In Our Life The accessibility of the maxillary 2 nd molar is the most common problem

8. Maxillary 2 nd molar In Our Life

9. Maxillary 2 nd molar Chronology

10. Maxillary 2 nd molar Buccal Aspect All the outlines are the same as 1 st molar Cusps Occlusal outline is formed by the MB and DB cusps MB cusp ; is the widest . DB cusp ; is smaller .

11. Maxillary 2 nd molar Buccal Aspect The roots The three roots are seen from the buccal aspect. The roots are less diverged, nearly parallel to each other and distally curved. A deep developmental groove .

12. Maxillary 2 nd molar Palatal Aspect Lingual convergence lingual convergence Cusps Occlusal outline is formed by the MP and DP cusps MP cusp ; is the largest . DP cusp ; is small , smooth and spheroid DB cusp can be seen. Surface description The lingual development groove . No Carabilli’s cusp . The roots The 3 roots are seen. the apex of the palatal root is in a line with the lingual developmental groove Developmental depression on the root surface

13. Maxillary 2 nd molar In Our Life

14. Maxillary 2 nd molar Mesial Aspect The same as the 1 st molar But.. Roots are less diverged “ not widely apart” No 5 th cusp

15. Maxillary 2 nd molar Distal Aspect The disto -buccal cusp is smaller. The apex of the palatal root is in line with the DP cusp.

16. Maxillary 2 nd molar Occlusal Aspect Geometric outline More Rhomboidal The BP dimension is greater than the MD dimension. The crown tapers distally& lingually . Elevations The 4 cusps. Oblique ridge . Marginal ridges , strong and well developed; the distal marginal ridge is shorter and at a lower level . MP DB MB DP

17. Maxillary 2 nd molar Occlusal Aspect Depressions Developmental grooves. Supplementary grooves. Major fossae; central fossa , Distal fossa. Minor fossae; mesial and distal triangular fossae.

18. Maxillary 2 nd molar Variations & Anomalies 4 cusp type 3 cusp type 2 buccal cusps “MB&DB” And only one palatal cusp

19. Maxillary 2 nd molar Variations & Anomalies Mulberry Molar

20. Maxillary Third Molar

21. Maxillary 3rd molar In our life Most commonly impacted tooth

22. Pulp Cavities Of Maxillary Molars

23. Type I Single canal from pulp chamber to apex Type II Two canals merge to form a single canal short of the apex Type III Two separate and distinct canals from chambers to apex Type IV One canal divided into two separate and distinct canals Root canal

24. Pulp Cavities Pulp Cavity Pulp Chamber Root Canal Cross Section Access Cavity

25. Pulp cavity of max. 1 st molar

26. Pulp Cavity 1st Molar

27. Pulp Cavity 1st Molar

28. Pulp Cavity 1st Molar access cavity Triangle Rhomboidal in case of MB2

29. Pulp cavity of max. 2 nd molar

30. Pulp Cavity 2 nd Molar Canals are not flared or spaced as in 1 st molar Two buccal root canals even if there is fused roots. One root canal in the mb root but two canals in the mb root also may be seen Because the dl cusp is normally reduced in size, the dl pulp horn is also relatively smaller. The DB orifice approaches midpoint between mb and palatal canals. When the general crown form of this tooth is heart shaped, cervical cross section is usually roughly triangular In mid root cross section the MB root is rectangular with rounded corners. DB and palatal roots are round or oval.

31. Thank you