1. TOOTH
   1. NO OF ROOTS
      1. SHAPE OF FLOOR OF PULP
         1. SHAPE OF ACCESS CAVITY
2. Mandibular Central incisor
   1. One root, one canal (or) one root, two canal, with one apical foramen Same as above
      1. Ovoid labiolingual direction
         1. Triangular shaped or ovoid shaped. Same as above
            1. Amang single rooted teeth, bifurcated roots are commonly seen in mandibular 1st premol followed by mandibular canines and incisors.
            2. Two or bifurcated root canals most common in mandibular incisors with the frequency of type II>type IV
3. Mandibular Lateral incisor
   1. same as above
4. Mandibular Canine
   1. One root one canal or two roots or two canals
      1. Ovoid
         1. Ovoid funnel shaped
5. Mandibular First premolar
   1. One root one canal or one Ovoid root and two root canals
      1. Ovoid in buccolingual direction.
6. MANDIBULAR SECOND PREMOLAR
   1. Same as Above
7. Mandibular First molar
   1. 2 roots & 3 canals. Two in mesial root and one in distal root
      1. Rhomboidal
         1. Trapezoidal in mesial half of crown. It becomes rectangular if a 4 canal is present
         2. About 30% of mandibular molars shows 4th canal in distal root
8. Mandibular Second molar
   1. 2 root & 3 canals.
      1. C-shaped morphology most common
         1. Same as above
         2. The mesial root has 1 canal and 1 foramen in 27% cases
9. Mandibular Third molar
   1. Usually have 2 roots and 2 root canals
      1. same as above
10. Maxillary Third molar
    1. May have fused roots, one conical root or four or more independent roots. Root canals may be one to five in number.
11. Maxillary Second Molar
    1. Three roots and canals
       1. Same as above
       2. One may find c-shaped pulp chamber with a c-shaped root canal
12. Maxillary First molar
    1. Three roots, three canals.
       1. Triangle with lingual wall missing
          1. Triangle in mesial half of tooth. Base towards buccal and apex towards palatal side
          2. Usually (80% by microscope 4th canal is found in meto buccal root in palatal direction This makes the access cavity rhomboidal. (COMED 2014)
13. Maxillary Second premolar
    1. One root with one canal & one foramina or one root, two canal and two foramina
       1. Elliptical or ovoid
          1. Ovoid in buccolingual
14. Maxillary First premolar
    1. Two roots with two canals and two foramina
       1. Elliptical (or) kidney shaped
          1. Ovoid in buccolingual direction
15. Maxillary Canine
    1. One root and one canal.
       1. Ovoid labiolingually
          1. Ovoid
16. Maxillary Lateral incisor
    1. One root, one canal Distal curvature of root is characteristic
       1. Oval Labiolingually than central incisor anatomy
          1. Triangular but smaller
17. Maxillary Central incisor
    1. One root, one canal
       1. Oval mesiodistally
          1. Maxillary centrals and can are least common teeth show bifurcated roots Palatal abscess formation characteristic of Lateral incis
             1. Triangular with apex towards cingulam
18. TOOTH
    1. NO OF ROOTS
       1. SHAPE OF FLOOR OF PULP
          1. SHAPE OF ACCESS CAVITY
19. ANATOMY OF ROOT APEX
20. CLASSIFICATION OF ISTHMUS
    1. TYPE 1
       1. defined as either two or three canals with no noticeable communication
    2. 2
       1. defined as two canals that had a definite connection between the two main canals
    3. 3
       1. differs from type II in that there are three canals instead of two,
    4. 4
       1. Incomplete C-shapes with three canals is also included in a type IV isthmus.
    5. 5
       1. identified as a true connection or corridor throughout the section
21. ACCESS CAVITY DESIGNS