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Table 3 Comparison of the amount of mouth opening to investigate trismus in the three surgical techniques

From: Use of piezoelectric surgery and Er:YAG laser:which one is more effective during impacted third molar surgery?

Paired t test (P value) Conventional rotary instrument Laser Piezosurgery Trismus
S.D Mean S.D Mean S.D Mean
  48.0 88.4 0.599 4.69 0.599 4.69 Before surgery
0.025 69.0 19.3 0.739 4.227 0.635 4.367 After surgery
0.0001 70.0 70.3 0.606 3.027 0.685 3.59 Day 2 after surgery
0.004 80.0 30.4 0.742 4.153 0.772 4.38 Day 7 after surgery