A BSTRACT Background: Medication-related osteonecrosis of the jaw (MRONJ) is an intense negative drug response causing increasing bone destruction in the maxillofacial area of patients. Aims and Objectives: To evaluate the knowledge and attitude of dental practitioner regarding risk factors of MRONJ in Saudi Arabia. Materials and Methods: A cross-sectional, questionnaire survey was carried out in King Khalid Hospital, Al-Kharj among dental practioners. Results: Approximately 60% of the practioners had a poor knowledge and there was a weak positive correlation with work experience. Conclusion: Poor knowledge regarding the MRONJ invites a continuing dental education specially to focus on general practioners.

A BSTRACT The conventional denture base resins had many drawbacks. Hence, the objective of this study was to compare the effect of incorporation of silver nanoparticles on mechanical properties of light-cured resin material. Materials and Methods: Specimens of acrylic resin (control group) and acrylic resin reinforced with 2% silver nanoparticles (test group) were evaluated for mechanical properties such as impact strength, transverse strength, modulus of elasticity, and deflection. Unpaired t test was used for statistical analysis. Results: Mechanical properties of light cure reinforced with silver nanoparticles were significantly higher than conventional light-cured resin ( P < 0.05). Conclusion: The incorporation of silver nanoparticles into light-cured resin increases the mechanical properties making it more stronger material.