This study indicated that changes occurring during the menstrual cycle influence the periodontium and induce inflammatory conditions.

No abstract

No abstract

No abstract

Background and Aim: The conventional procedure for removal of porcelain laminate veneers (PLVs) is time-consuming and inconvenient. The purpose of this study was to evaluate the efficacy of Er:YAG laser for debonding of PLVs. Materials and Methods: Forty-eight intact extracted human maxillary anterior teeth received discoid PLVs (24 feldspathic and 24 e-max ceramic). The PLVs had 0.7 mm thickness and 4 mm diameter. After cementation of all PLVs with a light-cure cement, samples were stored at 37ºC distilled water for 48 h. Samples of each ceramic were randomly divided into 3 groups of 8 samples. Then, laser was irradiated on the cemented PLVs as follows: (I) feldspathic PLVs without laser irradiation (control group), (II) feldspathic PLVs with laser irradiation (6 s, 10 Hz, 200 mJ, 2 W), (III) feldspathic PLVs with laser irradiation (6 s, 10 Hz, 300 mJ, 3 W), (IV) e-max PLVs without laser irradiation (control group), (V) e-max PLVs with laser radiation (6 s, 10 Hz, 200 mJ, 2 W), (VI) e-max PLVs with laser irradiation (6 s, 10 Hz, 300 mJ, 3 W). The shear bond strength of all samples was measured using a universal testing machine. We used Mann-Whitney and Kruskal-Wallis tests for data analysis (P<0.05). Results: Laser irradiation decreased the shear bond strength of both ceramics. But this decrease was only significant for the e-max group (P<0.05). No significant difference was found between different laser irradiation powers in the two ceramic groups. Conclusion: Er: YAG laser is effective for debonding of e-max PLVs.

No abstract

Background & Objetives: colonoscopy is an invasive method that is painful for patient especially for children. The objective of this research was investigation into the effect of supermint oral drop (peppermint essence) on the patient and colonoscopist group satisfaction during colonoscopy. Material & Methods: In this clinical trial study, 101 children candidate colonoscopy (7-14 years old) in children's medical center were randomly divided into two groups, case(n=51) and control(n=50) respectively. Control group received placebo and about half an hour before the colonoscopy control group case group was administrated 20 oral drops Supermint oil (peppermint oil). A standard questionnaire was filled after the colonoscopy for satisfaction of the patient and colonoscopist group. Data were analyzed using SPSS version 11.5 (T-test and Corraletion). Results: Two percents in control group and 54.9% in case group have a great degree of satisfaction. Besides, degrees of satisfaction in case group was 64.7% that significantly difference with those of control group (2%) (p<0.05). Mean value of pain, duration of colonoscopy in control group was 5/60+1/85 and in case group was 4/20+1/70 and this difference was significant(p<0.05). Conclusion: The results of this study showed that drop Supermint oil on pain relief have a positive influence in during colonoscopy in children, so peppermint essence causes increase in satisfaction in both patient and colonoscopy group.

No abstract