From: Application of an ultrasonic bone knife combined with a dental electric motor in the extraction of mandibular middle and low impacted teeth
Group
Number of cases
WI
DSD
FB
JD
LLN
Total
EAG
84
2
1
0
6(7.1%)
EBG
53
3
9(17.0%)
CG
63
7
5
23(36.5%)
χ2
21.69
P
0.017