Clinical and laboratory study of corrosion resistance of a base dental alloy for selective laser melting.

INTRODUCTION: CAD/CAM technologies are becoming widely used for the production of metal ceramic dental restorations. Powder Co-based alloys are developed for selective laser melting. The corrosion resistance of the dental alloy affects the biocompatibility, functional suitability, and longevity of the prosthetic restoration.

Allergic Contact Dermatitis due to Methacrylates in a Dental Technician - a Clinical Case.

INTRODUCTION: Methacrylate-based materials are used daily in dental practice. Specialized publications report these materials as allergens with a high sensitizing potential. AIM: To draw the attention of dental doctors and personnel to risk factors of developing occupational allergies. MATERIALS AND METHODS: History and dermatological status of the patient were taken and he was given an epicutaneous test. RESULTS: The allergy testing revealed a strong positive allergic reaction to methacrylates which persisted and was observed at 72 hours as well as on day 7. A diagnosis of allergic contact dermatitis was made on the basis of the patient's history, the clinical examination and the results of the epicutaneous test. CONCLUSION: The presented clinical case shows that early identification of the specific causative agents allows clinicians to take adequate measures and achieve results without having to use a medicine, and stop the progression of the occupational disease and the development of complications.

Respiratory Symptoms of Exposure to Substances in the Workplace among Bulgarian Dental Students: a Self-report Questionnaire Survey.

BACKGROUND: Dental students are at high risk of developing adverse respiratory reactions as a result of their practical work during their dentistry degree program when they come into contact with multiple airborne irritants and allergens. AIM: To estimate the prevalence of respiratory symptoms of exposure to substances in the workplace and associated risk factors in Bulgarian dental students. RESULTS: The prevalence of self-reported respiratory symptoms related to the pre-clinical and clinical training courses of the dentistry program was 12.4%. According to logistic regression analysis, the most important risk factors for work-related respiratory symptoms were a personal history of allergic rhinoconjunctivitis (odds ratio (OR) 6.34, 95% confidence interval (CI): 3.14-12.78), atopic dermatitis (OR 2.81, 95%CI: 1.26-6.26), and exposure to chemicals from dental environment for more than 6 hours a day (OR 3.60, 95%CI: 1.21-10.70). CONCLUSION: The results of this study suggest that work-related respiratory symptoms are frequent among dental students and indicate the need for efforts to establish effective primary preventive programs for occupational respiratory disorders at national level.

Skin reactions among Bulgarian dental students: A self-report questionnaire survey.

BACKGROUND: Dental students are at high risk of developing adverse skin reactions following practical work during the dentistry degree program. They encounter multiple irritants and allergens that may cause skin reactions on exposed parts of the body, notably the hands. OBJECTIVES: To estimate the prevalence of skin reactions related to the pre-clinical and clinical training courses of the dentistry program and associated risk factors in Bulgarian dental students. METHOD: A cross-sectional study was performed using a self-report questionnaire. RESULTS: A total of 467 dental students completed the questionnaire (response 51.8%). The prevalence of self-reported skin symptoms was 21.2%. According to logistic regression analysis, the most important risk factors for work-related skin symptoms were a personal history of atopic dermatitis (odds ratio [OR] 3.92, 95% confidence interval [CI]: 1.99-7.72), allergic rhinoconjunctivitis and/or asthma (OR 1.94, 95%CI: 1.03-3.68), personal history of contact allergy (OR 2.19, 95%CI: 1.06-4.55), and hand washing >16 times a day (OR 2.42, 95%CI: 1.06-5.52). CONCLUSIONS: The results of this study suggest that work-related skin symptoms are frequent among dental students and indicate the need to establish effective primary preventive programs for occupational skin disorders at a national level.