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Table 6 Three groups of patients after the first day of the mouth opening limitation grade score comparison (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

22

41

16

5

EBG

53

8

24

15

6

CG

63

4

26

24

9

χ2

16.33

P

0.012

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BMC Oral Health

ISSN: 1472-6831

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