This document provides details about the anatomy of a permanent mandibular right first molar. It describes the eruption timeline, root development, tooth notation, and anatomical features and landmarks of the buccal, lingual, mesial, distal, and occlusal surfaces. Key details include the presence of 5 cusps, bifurcating roots, and proximal contacts in the middle third. Descriptions of cusp ridges, grooves, fossae, and cervical and marginal ridges are included for each surface. The document concludes with references to Wheeler's Dental Anatomy book and a notification of an upcoming quiz.

1. DENTAL ANATOMY LAB
PERMANENT MANDIBULAR RIGHT
FIRST MOLAR

2. TOOTH NOTATION

3. PERMANENT MANDIBULAR RIGHT FIRST MOLAR
• Eruption
6 - 7 years
• Root Complete
9 - 10 years
CHRONOLOGY

4. BUCCAL
SURFACE
1. Mesiobuccal cusp = Mesial cusp ridge + Distal cusp ridge.
2. Distobuccal cusp = Mesial cusp ridge + Distal cusp ridge.
3. Mesiolingual cusp= Mesial cusp ridge + Distal cusp ridge.
4. Distolingual cusp = Mesial cusp ridge + Distal cusp ridge.
5. Distal cusp (
f
ifth cusp) & its mesial cusp ridge.
6. Mesiobuccal developmental groove.
7. Distobuccal developmental groove.
8. Cervical ridge.
9. Cervical line.
10.Root trunk.
11. Mesial Root & its apex.
12. Distal Root & its apex.
13. Bifurcation area.

5. BUCCAL
SURFACE
• Proximal Contact:
1- Mesial
Within middle third.
2- Distal
Within middle third.

6. LINGUAL
SURFACE
1. Mesiolingual cusp= Mesial cusp ridge + Distal cusp ridge.
2. Distolingual cusp = Mesial cusp ridge + Distal cusp ridge.
3. Part of Distobuccal cusp.
4. Lingual developmental groove.
5. Cervical line.
6. Root trunk.
7. Mesial Root & its apex.
8. Distal root & its apex.
9. Bifurcation area.

7. MESIAL
SURFACE
1. Mesiobuccal cusp & its Mesial cusp ridge.
2. Mesiolingual cusp & its Mesial cusp ridge.
3. Mesial marginal ridge.
4. Mesial Contact area.
5. Developmental Depression.
6. Cervical ridge.
7. Cervical line.
8. Mesial root & its apex.

8. MESIAL
SURFACE
• Contour Height
1- Buccal
Within cervical third.
2- Lingual
Within middle third.

9. DISTAL
SURFACE
1. Mesiobuccal cusp & its distal cusp ridge.
2. Mesiolingual cusp & its distal cusp ridge.
3. Distobuccal cusp & its distal cusp ridge.
4. Distolingual cusp & its distal cusp ridge.
5. Distal cusp (
f
ifth cusp).
6. Distal marginal ridge.
7. Distal Contact area.
8. Cervical ridge.
9. Cervical line.
10.Distal root & its apex.
11. Part of mesial root.

10. OCCLUSAL
SURFACE
1. Mesiobuccal cusp & its mesial and distal cusp ridge.
2. Mesiolingual cusp & its mesial and distal cusp ridge.
3. Distobuccal cusp & its mesial and distal cusp ridge.
4. Distolingual cusp & its mesial and distal cusp ridge.
5. Distal cusp & its mesial and distal cusp ridge.
6. Mesial marginal ridge.
7. Distal marginal ridge.
8. Central fossa & central pit.
9. Mesial triangular fossa & mesial pit.
10.Distal triangular fossa & distal pit.
11. Central developmental groove.
12. Mesiobuccal developmental groove.
13. Distobuccal developmental groove.
14.Lingual developmental groove.

11. OCCLUSAL
SURFACE
• 0utline:
Quadrilateral
OR
Hexagonal
OR
Pentagonal.

12. • WHEELER’S DENTAL ANATOMY, PHYSIOLOGY AND OCCLUSION, 10TH.
Reference
END OF LAB
QUIZ

13. QUESTION :
1-
2-
Time = 5 minutes.
Good Luck