Background and aim: the present study aimed to assess the effect of teeth whitening strips on dental plaque pH in vivo. Materials and Methods: This in vivo experimental study was conducted on 21 individuals, who were requested to use Crest 3D whitening strips for 30 minutes once a day and for 14 days according to the manufacturer’s instructions. Dental plaque pH was measured using GC p...

Purpose: To evaluate imbibition and syneresis in four commercially available irreversible hydrocolloid (alginate) impression materials at different time intervals (10, 20 and 30 minutes). Materials and methods: Eighty samples of four commercially available irreversible hydrocolloid (alginate) impression materials Algitex (DPI, Mumbai), Plastalgin (Septodont, Cedex, France), Zelgan 2002 (Dentspl...

objective: active and passive smoking lead to the production of a number of oxidants and antioxidants with various adverse health effects compromising the immune system. tobacco use increases the production of free radicals as well. the purpose of this study was to determine the effects of passive smoking on total antioxidant capacity (tac) of serum and saliva in rats. methods: this experimenta...

conclusions this study can help find a culturally appropriate intervention to delay sexual initiation and prevent sexual behavior before marriage in adolescents and young adults. the results of the present study have both experimental and theoretical implications for future research. finally, this study is a form of shared experience that can help similar studies. results the study included 30 ...

Purpose To analyze the results of the runtimes of one, three, five, and seven minutes of the high-pitched blowing vocal exercise in women without voice complaints and with dysphonia and vocal nodules. Methods This is an experimental study with a consecutive and convenience sample of 60 women divided into two groups: 30 participants with dysphonia caused by vocal fold nodules (study group - SG...

introduction: renal colic can be managed by preventing the contraction movements of ureter muscles. by reducing acetylcholine in the nerve terminals, magnesium sulfate could be effective in this regard. the aim of this study is to investigate the effect of magnesium sulfate on acute renal colic pain relief. method: the present study was a double-blind clinical trial in which the patients suffer...

plants are rich source of phenolic compounds (phenolic acids, flavonoids and tannins) that are most important natural antioxidants. in the present study two ultrasonic methods including probe and bath were used for the extraction of phenolic and flavonoid compounds from celtis australis. the effects of different extraction time including 30, 60 and 90 min (bath method) and 5, 10 and 20 min (pro...