Does the application of autologous injectable Platelet-Rich Fibrin (i-PRF) affect the patient’s daily performance during the retraction of upper canines? A single-centre randomized split-mouth controlled trial

Table 1 The list of questions asked to the patients in both questionnaires

	N^o	Question^a
Questionnaire 1	1	How much pain do you feel at the injection side?
	2	How much pain do you feel at the control side?
	3	Do you experience discomfort at the injection side?
	4	Do you experience discomfort at the control side?
	5	Do you experience swelling at the injection side?
	6	Do you experience swelling at the control side?
	7	Do you experience chewing difficulties at the injection side?
	8	Do you experience chewing difficulties at the control side?
	9	Do you experience swallowing difficulties?
	10	Do you experience jaw movement limitations?
Questionnaire 2	11	Are you satisfied with this procedure?
	12	What was more disturbing to you-the extraction of the premolars or the injection? The extraction—The injection – Both
	13	Would you advise this procedure to a friend? Yes/No

^aThe first ten questions were included in the first questionnaire while the remaining ones in the second questionnaire

ISSN: 1472-6831