Mesio-distal direction X-Ray pictures of 74 teeth from healthy Young (age twenties) men were analyzed. (Fig.1, 2, Table 1, 2,)1) Vertical distance from pulp horn to cusp or Cutting edge upper central: on labial (a) 5.1mm on lingual (a')lateral: 5.2lst...
Mesio-distal direction X-Ray pictures of 74 teeth from healthy Young (age twenties) men were analyzed. (Fig.1, 2, Table 1, 2,)1) Vertical distance from pulp horn to cusp or Cutting edge upper central: on labial (a) 5.1mm on lingual (a')lateral: 5.2lst premolar: 5.2 5.52nd // 5.3 5.4lower central, lateral 4.4lst premolar 4.7 4.52nd // 4.5 4.32) Vertical distance from pulp horn to dentino-enamel junction upper central: on labial (b) 5.7mm on lingual (b') 5.8lateral 3.9 4.5lst premolar 2.9 1.82nd // 3.0 1.8lower central, lateral 4.5 4.8lst premolar 1.6 1.32nd // 1.3 1.23) Majority of apical openings were found on labial or lingual side.