Background: Ethics encompasses moral conduct and judgment. The typical expectation of any dental practitioner to benefit society & humanity and to provide the best ethical attitude towards their patients. There are five ethical components: autonomy (self-governess), non-malfeasance (do no harm), beneficence (do good), justice (fairness), veracity (truthfulness).This study aims to evaluate dental student and dental practitioner knowledge of dental ethics at dental schools in Riyadh city.Methods: This is a cross-sectional study of dental students and dentists from different dental schools in Riyadh city, Saudi Arabia. The study populations encompassed dental students and dentists in Riyadh City, to a total of 625 individuals. A questionnaire was utilized to address the five main components of ethics. It was approved by the institutional review board of Riyadh Elm University.Results: A total of 625 participants were included in the study and of these, 67.5% (n= 422) were female. Only education year (P-value= 0.002), and university (P-value= 0.042) were significant predictors of the participant's awareness of the Hippocratic oath. Meanwhile, gender (P-value= 0.004), and university (P-value< 0.001) were the significant predictors of the participants' knowledge of the non-malefience (do no harm) concept. Conclusion:Most of the participants were unaware of the five ethical components. Dentists and dental students should know more about these principles. More courses and workshops are recommended to provide sufficient knowledge on ethical components among dental students.

Background: Several treatment options are available for restorative dental treatment of moderate to large teeth defects. However, in recent years, improved computer-aided design and computer-aided manufacturing (CAD/CAM) technology show several advantages, including favorable esthetic results, conservative preparation techniques and cost-effectiveness hence the aim of the study was to search for the best available evidence in investigating whether CAD/CAM fabricated partial coverage restorations will show better marginal adaptation and provide an evidence-based clinically relevant statement. Methodology: An extensive search was performed using four online databases. Search strategies were developed for each online database, the studies were reviewed by three independent authors, and inclusion/exclusion criteria were applied and the quality of the included studies was assessed. Results: The initial search resulted in 998 studies from all the databases. Six clinical studies were identified as relevant to the research question and were included in the qualitative assessment. Conclusions: Marginal adaptation of CAD/CAM-fabricated restoration shows excellent clinical outcomes in short-term observation periods. There is a need for clinical trials that compare the clinical outcomes of CAD/CAM-fabricated restoration to direct composite restorations.