Dentosphere : World of Dentistry

 # Least invasive way to treat the fracture of edentulous mandible is: A. External splint fixation B. Open reduction with transosseous wire ligation C. Percutaneous intramedullary pinning D. Gunning splint The correct answer is D. Gunning Splint. Treating edentulous mandibular fracture is difficult in elderly patients due to compromised medical condition of the patient and various contraindications for the surgical approach. The complication rate of infection or malunion is higher compared to fractures in younger, dentulous patients. For such conditions, ‘Gunning splint’ is a better option as it provides close reduction and stabilization of mandibular fracture, thus improving the prognosis. A Gunning splint is a type of orthopedic splint that can be used to immobilize and support the mandible. It is typically made of a rigid material, such as metal or plastic, and is shaped to fit around the mandible. The splint is named after William Gunning, who is credited with developing the de...

 # The active ingredient of tooth mousse is: A. Xylitol B. Calcium C. Casein D. Chlorhexidine The correct answer is C. Casein. Tooth Mousse is a topical oral health product that was developed at the Melbourne Dental School, University of Melbourne. Tooth Mousse comes in the form of a foamy crème, and is available in a range of flavours including: Melon, Strawberry, Tutti-Frutti, Mint and Vanilla. Tooth Mousse contains casein (a major milk protein), as well as calcium and phosphate. Calcium and phosphate are the major minerals that teeth are made from. Tooth Mousse is available in two product options: with or without fluoride. The general Tooth Mousse product does not contain fluoride, whereas Tooth Mousse Plus does contain fluoride. Tooth Mousse is not toothpaste. It is made of milk products so swallowing the product is safe and it can be used throughout the day.

 # Which periodontal fibres are consistent and are reconstructed even after the destruction of the alveolar bone?  A. Apical B. Oblique C. Alveolar crest group D. Transseptal The correct answer is D. Transseptal. Transseptal group of PDL fibers Functions:  - Reconstructed even after destruction of the alveolar bone has occurred in the periodontal disease.  - Responsible for returning teeth to their original state after orthodontic therapy.  Position:  Extends interproximally over alveolar bone crest and embedded in the cementum of adjacent teeth 

 # Ringer’s lactate does not contain: A. Sodium B. Chloride C. Calcium D. Magnesium The correct answer is D. Magnesium. Ringer's lactate solution (RL), also known as sodium lactate solution, Lactated Ringer’s, and Hartmann's solution, is a mixture of sodium chloride, sodium lactate, potassium chloride, and calcium chloride in water. It is used for replacing fluids and electrolytes in those who have low blood volume or low blood pressure. It may also be used to treat metabolic acidosis and to wash the eye following a chemical burn. It is given by intravenous infusion or applied to the affected area. 

 # Commonest cause of TMJ ankylosis is: a) Trauma b) Development disturbances c) Infections  d) Atrophy The correct answer is A. Trauma.  The definite cause of ankylosis of TMJ is unknown. Two main factors predisposing to the ankylosis are trauma and infection in or around the joint region. In 1968, Topazian reported that 26 to 75 percent of cases of TMJ ankylosis are seen following trauma, while 44 to 68 percent are seen due to infection.  A high percentage of TMJ ankylosis are seen following trauma. At birth, TMJ may receive trauma from a forceps delivery. Trauma during intrauterine life leads to congenital ankylosis.

 # Enzymes are generally: A. Proteins B. Carbohydrate C. Lipid D. Vitamin The correct answer is A. Proteins.  Enzymes may be defined as biocatalysts synthesized by living cells. They are protein in nature (exception - RNA acting as ribozyme), colloidal and thermolabile in character, and specific in their action.

 # Nerve involved in Saturday night palsy is: A. Radial B. Median C. Auxiliary D. Facial The correct answer is A. Radial.  THE TERM Saturday night palsy has become synonymous with radial nerve compression in the arm resulting from direct pressure against a firm object. It typically follows deep sleep on the arm, often after alcohol intoxication. The commonly accepted origin of the phrase is the association of Saturday night with drinking alcohol heavily.