The document compares primary and permanent teeth, detailing their structural differences, composition, and developmental timelines. It highlights characteristics such as size, color, morphology, and dental anatomy variations between the two types of teeth. Additionally, it discusses aspects like enamel thickness, dentin composition, and the presence of neonatal lines.

1. Dr. J. Jude

2. Primary
 A total of 20 teeth
 10 in each jaw and 5 in each quadrant.
Permanent
 A total of 32 teeth
 16 in each jaw and 8 in each quadrant

3. Primary
 I 2/2 ,C 1/1 ,M 2/2
Permanent
 I 2/2 ,C 1/1 ,PM 2/2 ,M 3/3

5. Primary
 A B C D E / A B D C E
Permanent
 Maxillary Teeth: 6124357
 Mandibular Teeth: 6123457

6. Primary
 Lasts from 6months to 6 years
Permanent
 12 years and beyond

7. Primary
 smaller in over all size and crown dimensions
Permanent
 larger

9. Primary
 lighter. Their refractive index is comparable to
that of milk.
Permanent
 darker. They appear yellowish white

10. Primary
 Mesiodistal length is more than the cervicoincisal
length.
Permanent
 Cervicoincisal length is greater

11. Primary
 More prominent
Permanent
 Less prominent

12. Primary
 More prominent
Permanent
 Less prominent

13. Primary
 do not exhibit mamelons
Permanent
 Newly erupted permanent incisors exhibit
mamelons.

14. Primary
 More conical in shape and the cusp tip is more
pointed and sharp.
Permanent
 Less conical and cusp tips are less pointed.

15. Primary
 relatively flat
Permanent
 curved contour.

16. Primary
 Supplemental grooves are more
Permanent
 Supplemental grooves are less

17. Primary
 broader, flatter and situated gingivally
Permanent
 narrower and situated occlusally

18. Primary
 Crown of second molar is larger than the first
molar.
Permanent
 Crown of first molar are larger than the second
and third molar.

21. Primary
 Has 3 cusps
Permanent
 Has 4 cusps + 1 accessory cusp.

22. Primary
 4 cusps + 1 accessory cusp
Permanent
 Has 4 cusps

23. Primary
 4 cusps
Permanent
 Has 5 cusps

24. Primary
 5 cusps
Permanent
 Has 4 cusps

25. Primary
 narrow and straight
Permanent
 longer and curved

27. Primary
 Furcation of molar roots is placed more cervically
so that the root trunk is much smaller
Permanent
 Furcation in molars is placed more apically and
thus trunk is larger.

28. Primary
 undergo physiologic resorption and the primary
teeth are shed naturally
Permanent
 Physiologic resorption is absent

29. Primary
 proportionately larger when compared to crown
size
Permanent
 smaller in relation to crown size

31. Primary
 follows DEJ more closely
Permanent
 follows DEJ less closely

32. Primary
 higher and closer to outer surface
Permanent
 lower and away from outer surface

33. Primary
 thin, tortuous and branching path
Permanent
 well defined and less branching

34. Primary
 Floor of the pulp chamber is more porous
Permanent
 Floor of the pulp chamber do not have
many accessory canals.

35. Primary
 wider
Permanent
 smaller/Narrower

36. Primary
 Enamel is thinner and is about 1mm of uniform
thickness
Permanent
 Enamel is 2-3 mm thick and is not uniform in
thickness.

38. Primary
 Enamel rods at the cervical third of
primary crowns are directed occlusally
Permanent
 Enamel rods at the cervix are directed
apically.

39. Primary
 half that of permanent teeth.
Permanent
 Greater thickness of dentin

40. Primary
 less regular.
Permanent
 more regular.

41. Primary
 Absent
Permanent
 present

42. Primary
 primary teeth have abundant blood supply, poor
localization of infection and inflammation.
Permanent
 reduced blood supply. Thus, infection and
inflammation are comparatively well localized

43. Primary
 less densely innervated.
Permanent
 more densely innervated

44. Primary
 Cementum is thin, made up of only primary
cementum
Permanent
 Cementum is thick, both primary and secondary
cementum are present.

45. Primary
 Both enamel and dentin are less mineralized and
less dense
Permanent
 Both enamel and dentin are more mineralized
and more dense.

46. Primary
 Neonatal lines are present in all primary
teeth both in enamel and dentin
Permanent
 Neonatal lines are seen only in first molar.