background to achive natural and harmonic restoration color, shade matching is a commonly used method in dental practice using shade guides. to prevent infection,shade guides are required to be disinfected .using of disinfection solutions gradually affect the color of dental equipment. the aim of this study was to evaluate the effect of three disinfectants sodium hypochlorite solution 5/25%, de...

The purpose of this survey was to determine the knowledge and awareness about the principles of tooth shade selection among final year dental students, interns, general dentists and specialist prosthodontists/restorative dentists in Riyadh, Saudi Arabia. A self-administrative questionnaire especially designed for this study, was distributed among a conveniently selected sample. A total of 292 (...

OBJECTIVE The purpose of this 14-day parallel, double blind clinical trial was to evaluate the tooth whitening efficacy of a 9% hydrogen peroxide gel (Colgate Visible White) relative to a 20% carbamide peroxide gel (Opalescence) positive control. METHODS Forty-six consenting adults were randomly assigned to use one of the two products. All participants had 6 unrestored maxillary anterior teet...

OBJECTIVE To investigate the influence of translucency of CAD/CAM ceramic milling blocks on the final color of porcelain veneer cemented using resin cement with two different opacities. MATERIALS AND METHODS A standardized incisal lap preparation was made on a maxillary right central incisor that was duplicated using composite resin material (Z250, A4, 3M ESPE). The resin dies were individual...

The molecular basis behind shade tolerance in plants is not fully understood. Previously, we have shown that a connection may exist between shade tolerance and dwarfism, however, the mechanism connecting these phenotypes is not well understood. In order to clarify this connection, we analyzed the transcriptome of a previously identified shade-tolerant mutant of perennial ryegrass (Lolium perenn...

AIM To evaluate the ability of dental students to match shades under three various light conditions. MATERIALS AND METHODS Sixty senior dental students participated in this study. All students were tested for color deficiency using Ishahara's tests. Nine classical vita shade tabs were randomly selected and their identification codes were concealed. The students were asked to match these 9 sel...

purpose: the rural master plan is one of the most fundamental measures implemented in iran. considering the implementation trend of these plans, their assessment is essential for rural improvement planning. the purpose of this study is to assess the physical, economic and social effects of the master plan in neyshabour county. methodology: this study is an applied study. the research method emp...

STATEMENT OF PROBLEM Many factors influence the quality of shade selection, and isolating how significantly each of these factors influences results is difficult. PURPOSE The purpose of this in vitro study was to compare results of shade matching using handheld lights with or without a polarizing filter with results obtained using a professional viewing booth and to analyze the influence of e...

This study evaluated the degree of color change of teeth and the sensitivities of teeth and gums in an in vivo study. Ranir Whitening Wraps (WW2) and Crest Whitestrips Premium (WP2) were used twice a day and Ranir Whitening Wraps (WW1) were used once a day. Color evaluations occurred at baseline, after five and seven-day use of bleaching agent and 14 days post-bleaching. Color change was evalua...