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Table 5 Comparison of pain and swelling variables at different times of piezoelectric surgery

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

Paired t test (P value) Piezosurgery (t2) Piezosurgery (t1) Variables
S.D Mean S.D Mean
0.0001 1.113 5.67 0 0 Pain before surgery (t1) and after surgery (t2)
0.0001 1.082 3.20 0 0 Pain before surgery (t1) and day 2 after surgery (t2)
0.0001 0.704 0.93 0 0 Pain before surgery (t1) and day 7 after surgery (t2)
0.0001 1.082 3.20 1.113 5.67 Pain after surgery (t1) and day 2 after surgery (t2)
0.0001 0.704 0.93 1.113 5.67 Pain after surgery (t1) and day 7 after surgery (t2)
0.0001 0.704 0.93 1.082 3.20 Pain day 2 after surgery (t1) and day 7 after surgery (t2)
0.0001 1.879 38.852 1.892 38.657 Swelling before surgery (t1) and after surgery (t2)
0.0001 1.884 40.750 1.892 38.657 Swelling before surgery (t1) and day 2 after surgery (t2)
0.0001 1.924 38.991 1.892 38.657 Swelling before surgery (t1) and day 7 after surgery (t2)
0.0001 1.884 40.75 1.879 38.852 Swelling after surgery (t1) and day 2 after surgery (t2)
0.009 1.924 38.991 1.879 38.852 Swelling after surgery (t1) and day 7 after surgery (t2)
0.0001 1.924 38.991 1.884 40.75 Swelling day 2 after surgery (t1) and day 7 after surgery (t2)