Table 1

Master cone adjustments of extracted teeth prepared by students following learning phase with plastic bloc (P), ceramic RCS (C), and hybrid ceramic RCS (CR), by number and percentage of teeth

RCS Used for Learning PhaseShort Master Cone AdjustmentaAcceptable Master Cone AdjustmentbLong Master Cone Adjustmentc
P13 (43.3%)14 (46.7%)3 (10.0%)
C18 (60.0%)9 (30.0%)3 (10.0%)
CR11 (36.7%)17 (56.7%)2 (6.7%)
  • a Tip of master cone >2 mm from apical constriction

  • b Tip of master cone ≤2 mm from apical constriction

  • c Tip of master cone extends beyond apical constriction