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Comparative drilling outcomes of “Experienced,” “Simulation,” and “Novice” group on resin model. (a) Mean buccolingual angle deviation. (b) Mean mesiodistal angle deviation. (c) Mean drilling depth. (d) Mean position difference. (e) Mean total duration. (f) Site preparation (percentage) without perforation. Results are expressed as m ± SEM, n = 20 per group. *P < 0.05 versus Experienced.
