Clinical efficacy and side effects of in-office and home bleaching treatments

This study investigated the effect of in-office and home bleaching agents on colour changes and tooth sensitivity We studied 50 mandibular and maxillar arches of 25 female subjects with a mean age of 24+3.9 years. They were divided into four groups: Subjects in group I used opalescent Xtraboost office bleaching for three intervals. Opalescence 20% [home bleaching; group II], Opalescent 15% [home bleaching; group III], and Nitewhite 16% [home bleaching; group IV] used for two weeks. Shades were assessed by the vita shade guide before treatment and at one week, two weeks, and three weeks interval after treatment for relapse of shade. Tooth sensitivity and gingival irritation were recorded. Using Wilcoxon signed ranks test, the change in colour from baseline to one and two weeks post treatment was significant in all groups. In-office bleaching had the same effect on colour change [60%] and showed significant tooth sensitivity as group III. Group IV had the least effect, with [40% colour change, [40%] increase in tooth sensitivity, and gingival irritation, although it had the longest application time 63 hours. Group II had the best result of [77.7%] colour change with no tooth sensitivity or gingival irritation. Home bleaching with 20% concentration was the most effective of all groups. Office bleaching had the same effect on colour change and tooth sensitivity as 15% home bleaching. Nitewhite was the least effective and was highly irritant

Vulnerability of specific coronal tooth surfaces to dental caries in Saudi versus non Saudi population residing in Jeddah

Dental caries is an ancient disease that is present indiscriminately all over the world. Research on dental caries distribution on permanent teeth surfaces among Saudis is non-existent. An adult group of 250 Saudi and 250 non-saudi groups with age range of 18 years and above were randomly selected and their teeth were clinically examined for Decayed, Missing, and Filled Teeth [DMFT] and surfaces [DMFS]. For each patient a bitewing radiograph was taken for interproximal caries detection. Age range of the study group was 18-50 years, the mean DMFT was 10.4 and 11.2 for Saudi and Nonsaudi subjects respectively. The DMFT increased with age in both groups. The upper posterior decayed teeth showed higher percentage than the lower with more occlusal caries than proximal. Significance was present in the number of Missing Teeth [MT] between both groups for teeth extracted due to caries. The upper premolars had a higher number of decayed, missing and filled teeth than lower premolars. Adults above 18 years of age are highly susceptible to caries. The need on the establishment of new strategies for preventive dental care should be directed toward individuals assessed to be at high risk