Morphology+Primary+vs.+Permanent

>> >> >> >>
 * ** Size : ** Primary dentition is smaller in all dimensions with the exception of primary molars which are larger than successor premolars
 * ** Form : **
 * Primary anatomic crowns are shorter and wider (mesial-distal dimension greater than the cervical-incisal/occlusal dimension)
 * Primary molars are narrower occlusally compared to the cervical dimension
 * Primary canines and molars have a more prominent cervical contour
 * Primary dentition has greater constriction at the CEJ
 * **  Enamel and Dentin **  :
 * Primary enamel and dentin is thinner
 * Primary enamel rods in the gingival third run occlusally from the DEJ while in the permanent dentition the rods run in a cervical direction
 * ** Pulp: **
 * Primary teeth have larger pulp cavities relative to the crown size
 * Primary molar pulp chamber outline follows the occlusal crown surface with pulp horns under each cusp
 * Mesial pulp horns of primary molars are closer to the surface than distal horns with the mesial-buccal pulp horn most prominent
 * ** Roots: **
 * Primary roots are more divergent
 * Primary root development completed one year after eruption. Resorption begins 1-2 years before exfoliation
 * ** Proximal Contact: **
 * Proximal surfaces of the primary dentition are broad and flat
 * ** Enamel Color and Hardness: **
 * Primary teeth are whiter
 * Primary enamel undergoes greater attrition


 * The upper first molars (#B, #I), differ most in morphology from individual to individual **