Dentosphere : World of Dentistry

# First Water Fluoridation was done in: A. Sweden B. Canada C. Michigan (USA) D. California Answer: C. Michigan (USA) To test the hypothesis that adding fluoride would prevent cavities, Dean and his colleagues conducted a controlled experiment by fluoridating the water in Grand Rapids, Michigan, starting 25 January 1945. The results, published in 1950, showed significant reduction of cavities. CLICK HERE TO VIEW  ALL MCQS

According to Contemporary Oral and Maxillofacial Surgery, 6th Edition, the PRINCIPLES OF THERAPY OF ODONTOGENIC INFECTIONS are: Principle 1: Determine Severity of Infection Principle 2: Evaluate State of Patient’s Host Defense Mechanisms Compromised Host Defense States: Uncontrolled Metabolic Diseases • Poorly controlled diabetes • Alcoholism • Malnutrition • End-stage renal disease Immune System–Suppressing Diseases • Human immunodeficiency virus/acquired immunodeficiency syndrome • Lymphomas and leukemias • Other malignancies • Congenital and acquired immunologic diseases Immunosuppressive Therapies • Cancer chemotherapy • Corticosteroids • Organ transplantation Principle 3: Determine Whether Patient Should Be Treated by General Dentist or Oral-Maxillofacial Surgeon Criteria for Referral to an Oral-Maxillofacial Surgeon • Difficulty breathing • Difficulty swallowing • Dehydration • Moderate to severe trismus (interincisal opening less than 20 mm) • Swelling ext...

Most Common Causes of Some Conditions: 1. The most common cause of adrenal insufficiency is chronic therapeutic corticosteroid administration (secondary adrenal insufficiency). 2. The most common cause of a transient loss of consciousness in the dental office is vasovagal syncope. 3. During normal development, the lower third molar begins in a horizontal angulation, and as the tooth develops and the jaw grows, the angulation changes from horizontal to mesioangular to vertical. Failure of rotation from the mesioangular to the vertical direction is the most common cause of lower third molars becoming impacted . 4. A complication that every dentist believes can never happen—but happens surprisingly often—is extraction of the wrong tooth . This is usually the most common cause of malpractice lawsuits against dentists . 5. The most common cause of delayed wound healing is infection . Infections are a rare complication after routine dental extraction and are primarily seen af...

# Which of the following materials cannot be used as a base under composite restorations? A. Zinc Phosphate B. Zinc Polycarboxylate C. Zinc Oxide Eugenol D. Glass Ionomer Cement Answer: C. Zinc Oxide Eugenol. Reason: Residual free eugenol interferes with the proper setting of resin-based composites or resin cements. Therefore, various types of carboxylic acids have been used to replace eugenol and produce a ZOE-like material. These products are called zinc oxide-non eugenol cements. Reference: Phillip's Science of Dental Materials, 12th Edition, Page No. 331 CLICK HERE TO VIEW  ALL MCQS