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Table 2 Comparison of facial dimension variable to investigate the swelling 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 Swelling
S.D Mean S.D Mean S.D Mean
0.647 43.0 22.386 1.905 38.662 1.892 38.657 Before surgery
0.117 33.0 38.993 1.99 988/38 1.879 38.852 After surgery
0.0001 34.0 61.398 2.022 39.80 1.884 40.75 Day 2 after surgery
0.128 39.0 38.829 1.939 38.899 1.924 38.991 Day 7 after surgery