Dentosphere : World of Dentistry

 # Inflammation and bleeding on probing around an implant are usually less than with natural teeth because: A. less plaque accumulation B. less blood vessels C. dense connective tissue with type III collagen D. sulcus lining by keratinized mucosa The correct answer is B. Less blood vessels. Compared with an implant, the support system of a natural tooth is better designed to reduce the biomechanical forces distributed to the tooth/restoration and the crestal bone region. The periodontal membrane, biomechanical design of the tooth root and material, nerve and blood vessel complex, occlusal material (enamel) and surrounding type of bone blend to decrease the risk of occlusal overload to the natural tooth system. Regardless of whether gingival health is relative to success, all dentists agree that the ideal soft tissue condition around an implant is an absence of inflammation. Radiographic bone loss and increased pocket depth have been correlated with sulcular bleeding. Therefore, the...

 # Caries risk status for a DMFT score of 4 is: A. Very low B. Low C. Moderate D. High The correct answer is C. Moderate. The World Health Organization Global Data Bank (1995) shows that out of 178 countries for which data is available 25 percent were categorized as having very low levels of dental caries (DMFT 0.0 to 1.1), 42 percent as low (DMFT 1.2 to 2.6), 30 percent as moderate (DMFT 2.7 to 4.4) and 13 percent as high (DMFT 4.5 to 6.5) and 2.1 percent countries as very high, i.e. 6.6. Ref: A Textbook of  Public Health Dentistry, CM Marya

 # Parent child relationship has been described as: A. One tailed B. Two tailed C. Three tailed D. Multi tailed The correct answer is A. One tailed. The home is the first school where a child learns to behave. All the home individuals influence the child’s behavior but none so much as the mother, e.g. in case of a broken home, the child may feel insecure, inferior, apathic and depressed. Mother child relation- ship has been described as one-tailed. Ref: Shobha Tandon

 # If base of uvula and soft palate are visualized on maximal mouth opening it is referred to as Mallampati  classification: A. Class I B. Class II C. Class III D. Class IV The correct answer is C. Class III. Visualization of the amount of posterior pharynx is important and correlates with the difficulty of intubation. Visualization of the pharynx can be obscured by the tongue, which also interferes with visualization of the larynx on laryngoscopy.  The Mallampati classification is based on the structures visualized with maximal mouth opening and tongue protrusion in a sitting position. Class I: Soft palate, fauces, uvula, and pillars are visualized Class II: Soft palate, fauces, and a portion of uvula are visualized Class III: Soft palate, the base of the uvula is visualized. Class IV: Only the hard palate is visualized

 # Behavior modification is based on the principle of: A. Cognitive theory B. Classical conditioning theory C. Social learning theory D. Operant conditioning theory The correct answer is C. Social learning theory. Behavior shaping is a form of behavior modification technique based on principles of social learning. It is the procedure that slowly develops desired behavior. The behavior-shaping techniques are: • Desensitization (TSD) • Modelling • Contingency management

 # The largest component of gutta percha cones is: a) Gutta percha  b) Zinc oxide c) Resins and waxes  d) Coloring agents The correct answer is B. Zinc oxide. Composition of gutta percha cones: (Constituent - Percentage of constituent - Function) Gutta percha - 20% - Matrix Zinc oxide - 66% - Filler Heavy metal sulfates (Bismuth sulphates) - 11% - Radio opacifier Waxes or resins - 3% - Plasticizer

 # CSF rhinorrhea is due to: A. Nasal fracture B. Guerin’s fracture C. Dural tear D. Condylar fracture The correct answer is C. Dural tear. CSF rhinorrhoea is the result of a dural tear associated with a fracture of the cribriform plate of the ethmoid in Lefort II and III fractures. Cerebrospinal Otorrhoea is due to a fracture of the petrous part of the temporal bone. CSF mixed with blood produces a double ring (Tramline effect) if dropped on a hospital sheet or pillow.