Table 2.

Results of questionnaire

Group	Evaluation by physicians			Patient discomfort			Patient tolerance
	Steady	Ordinary	Not steady	Mild	Moderate	Severe	Good	Medium	Poor
Experimental	17	3	1	18	2	1	18	3	0
Control	11	2	8	6	3	12	9	5	7
P value	< 0.05		< 0.05	< 0.05		< 0.05	< 0.05		< 0.05