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Table 5 Comparison of swelling grade scores on the first postoperative day in the three groups (n = 200, cases)

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

0分

1分

2分

3分

EAG

84

17

44

20

3

EBG

53

4

28

17

4

CG

63

0

29

26

8

χ2

22.50

P

0.001

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BMC Oral Health

ISSN: 1472-6831

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