IRCT201201094877N8 IRCT 2012-12-11 Vice chancellor for research, Isfahan University of Medical Sciences Effects of toothbrush wear on plaque control Clinical trial of effect of toothbrush wear on plaque control in dental faculty students. 2012-05-16 anticipated 26 Complete https://irct.ir/trial/5221 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Prevention. 0 (exploratory trials) Gingivitis. This study will be conducted in prospective interventional method. Twenty six participants are selected from dental students. We will use Butler toothbrush and oral disclosures which both of them are made in America, and Crest 7 toothpaste is made in Germany. Individuals will brush for 12 weeks two times a day. At the baseline and at 6, 9, 12 weeks plaque index will measured with O'Leary technique and with use of disclosure tablets. In 6, 9, 12 weeks Toothbrush wear index will measured with Rawls technique. In the Bass technique toothbrush is placed on the tooth with an angle of about 45 degrees. So brush strings penetrate to the gingival sulcus. Then will given short - range vibrating moves in the anterior – posterior toothbrush. In every area of the teeth, twenty moving is recommended. In the palatal and lingual maxillary and mandibular anterior teeth due to space constraints, the toothbrush put vertically and teeth are cleaned individually with tip. In occlusal surfaces, toothbrush placed horizontally and with low range of back - forward motions cleaning operation is carried.