NDEB Exam 2019 NDEB Solved Questions And Correct Answers (latest update)

The principal reason for a cavosurface bevel on an inlay preparation is to A. remove undermined enamel. B. improve marginal adaptation. C. decrease marginal percolation. D. increase resistance and retention forms.,B. improve marginal adaptation. Lichen planus occurs most frequently on the A. buccal mucosa. B. tongue. C. floor of the mouth. D. gingiva.,A. buccal mucosa. The pulpal floor of a Class II cavity is cut perpendicular to the long axis of the tooth EXCEPT in the A. maxillary first premolar. B. maxillary second premolar. C. mandibular second premolar. D. mandibular first premolar.,D. mandibular first premolar. Upon examination of an edentulous patient, it is observed that the tuberosities contact the retromolar pads at the correct occlusal vertical dimension. The treatment of choice is to A. reduce the retromolar pads surgically to provide the necessary clearance. B. reduce the tuberosities surgically to provide the necessary clearance. C. construct new dentures at an increased occlusal vertical dimension to gain the necessary clearance. D. proceed with construction of the denture and reduce the posterior extension of the mandibular denture to eliminate interferences.,B. reduce the tuberosities surgically to provide the necessary clearance. In the absence of "Hanks balanced salt solution", what is the most appropriate media to transport an avulsed tooth? A. Saliva. B. Milk. C. Saline. D. Tap water.,B. Milk. The setting of a zinc-phosphate cement can best be retarded by A. decreasing the particle size. B. increasing the concentration of water in the liquid. C. increasing the rate of addition of the powder to the liquid. D. cooling the glass mixing slab.,D. cooling the glass mixing slab. What is the most likely diagnosis of a white lesion on the retromolar pad opposing a non-functional molar? A. Alveolar ridge keratosis. B. Candidiasis. C. Lichen planus. D. Squamous cell carcinoma,A. Alveolar ridge keratosis Which of the following is the most likely cause of osteoporosis, glaucoma, hypertension and peptic ulcers in a 65 year old with Crohn's disease? A. Uncontrolled diabetes. B. Systemic corticosteroid therapy. C. Chronic renal failure. D. Prolonged NSAID therapy. E. Malabsorption syndrome.,B. Systemic corticosteroid therapy. A hinge axis facebow records A. Bennett angle. B. centric relation. C. lateral condylar inclination. D. horizontal condylar inclination. E. opening and closing axis of the mandible.,E. opening and closing axis of the mandible. The most important objective of occlusal adjustment of a natural dentition is to A. prevent temporomandibular joint syndrome. B. increase the shearing action in mastication. C. improve oral hygiene by preventing food impaction. D. achieve a more favorable direction and distribution of forces of occlusion.,D. achieve a more favorable direction and distribution of forces of occlusion. Which condition has NOT been associated with Candida albicans infection? A. Median rhomboid glossitis. B. Angular cheilitis. C. Denture stomatitis. D. Aphthous ulcerations. E. Oral hairy leukoplakia.,D. Aphthous ulcerations. Which of the following is essential for successful periodontal treatment? A. Scaling. B. Final evaluation and maintenance on a oneyear recall. C. Periodontal flap surgery. D. Elimination of local etiologic factors.,D. Elimination of local etiologic factors. If a complete mandibular denture causes a burning sensation in the premolar region, this is due to the denture exerting pressure in/on the A. fibres of the buccinator muscle. B. lingual branch of the mandibular division of the trigeminal nerve. C. underlying bone. D. mental branch of the inferior alveolar nerve. E. buccal frenum area.,D. mental branch of the inferior alveolar nerve. A hinge axis facebow records A. Bennett angle. B. centric relation. C. lateral condylar inclination. D. horizontal condylar inclination. E. opening and closing axis of the mandible.,E. opening and closing axis of the mandible. Which of the following microorganisms are most frequently found in infected root canals? A. Streptococcus viridans. B. Staphylococcus aureus. C. Lactobacilli. D. Enterococci. E. Staphylococcus albus.,A. Streptococcus viridans. The predominant type of movement produced by a finger spring on a removable appliance is A. torque. B. tipping. C. rotation. D. translation.,B. tipping. Epinephrine should be administered immediately in which of the following emergencies? A. A severe angina attack. B. A mild asthmatic attack. C. Severe anaphylaxis. D. Severe hypotension,C. Severe anaphylaxis. The location and extent of subgingival calculus is most accurately determined clinically by A. radiopaque solution used in conjunction with radiographs. B. disclosing solution. C. probing with a fine instrument. D. visual inspection,C. probing with a fine instrument. Endotoxin is A. a cell wall component of gram-negative bacteria. B. a potent inflammatory agent. C. present in diseased root cementum. D. All of the above.,D. All of the above. In inhalation analgesia, what is the safe maximal nitrous oxide concentration that can be delivered? A. 50%. B. 60%. C. 70%. D. 80%.,C. 70%. The bond between porcelain and metal in a ceramometal (porcelain bonded to metal) crown is A. chemical. B. mechanical. C. equally chemical and mechanical. D. neither chemical nor mechanical.,A. chemical. The predominant immunoglobulin isolated from saliva is A. IgG. B. IgM. C. IgA. D. IgD.,C. IgA. Soft tissue pockets CANNOT be reduced by A. occlusal adjustment. B. scaling and root planing (debridement). C. open flap curettage. D. guided tissue regeneration,A. occlusal adjustment. Roots of the permanent maxillary central incisors are completed by what age? A. 8 years. B. 10 years. C. 12 years. D. Later than 12 years.,B. 10 years. When designing a removable partial denture, changing the tilt of the cast on the surveyor alters the A. path of insertion of the planned removable partial denture. B. the position of the survey line on the cast. C. the undercut and non-undercut areas. D. the direction of forces applied to the partial denture.,A. path of insertion of the planned removable partial denture. Increased overjet, moderate facial convexity and a deep labio-mental sulcus is most characteristic of which facial type? A. Prognathic. B. Orthognathic. C. Retrognathic.,C. Retrognathic. Needle deflection increases as A. depth of injection increases. B. needle length increases. C. needle gauge decreases. D. All of the above.,D. All of the above. Acute or subacute suppurative osteomyelitis occurs most frequently in the A. anterior maxilla. B. posterior mandible. C. posterior maxilla. D. anterior mandible.,B. posterior mandible. The line drawn through the occlusal rests of two principal abutments is A. survey line. B. terminal line. C. axis of rotation/fulcrum line. D. line of greatest torque.,C. axis of rotation/fulcrum line. Intraoral soft tissue examination will NOT assist in the diagnosis of A. lichen planus. B. sinusitis. C. erythema multiforme. D. anemia. E. vitamin deficiencies,B. sinusitis. An anxious 67 year old patient presents for consultation to extract tooth 4.6. The medical history includes a heart murmur, hypertension and a cerebrovascular accident 5 years ago. Medications include clopidrogel, hydrochlorothiazide and rosuvastatin. What is the most appropriate preoperative management? A. Prescribing antibiotic prophylaxis. B. Ordering an INR test within 24 hours prior to procedure. C. Discussing with the patient the use of sedation. D. Requesting a complete blood count.,C. Discussing with the patient the use of sedation. Which of the following improves the prognosis of pulp vitality after indirect pulp capping? A. Use of calcium hydroxide. B. Having a well sealed restoration. C. Reducing other traumas to the pulp. D. Removing all demineralized dentin.,B. Having a well sealed restoration. In clinical dentistry, stiffness of wire is a function of A. length of the wire segment. B. diameter of the wire segment. C. alloy composition. D. All of the above. E. None of the above.,D. All of the above. An 8 year old patient has a permanent central incisor with a necrotic pulp and a wide open apex. The most appropriate management is to perform a/an A. pulpotomy. B. apexification. C. regenerative endodontics. D. root canal therapy.,B. apexification. Hyperplastic lingual tonsils may resemble which of the following? A. Epulis fissuratum. B. Lingual varicosities. C. Squamous cell carcinoma. D. Median rhomboid glossitis. E. Prominent fungiform papillae,C. Squamous cell carcinoma. The major disadvantage of zinc phosphate used to cement crowns is the A. development of heat during setting. B. pulp irritation. C. lack of edge strength. D. low crushing strength.,B. pulp irritation. The most effective way of minimizing a patient's radiation dose is A. a lead apron and thyroid collar. B. prescription radiography. C. fast emulsion film. D. intensifying screens.,B. prescription radiography. An acute periapical abscess originating from a mandibular third molar generally points and drains in the A. submandibular space. B. pterygomandibular space. C. buccal vestibule. D. buccal space.,A. submandibular space. Which of the following require prophylactic antibiotics prior to dental procedures causing a bacteremia? A. Implanted cardiac pacemakers. B. Prosthetic cardiac valves. C. Coronary artery bypass grafts. D. Cardiac stents one year after placement.,B. Prosthetic cardiac valves. Which of the following is/are NOT usually affected by hereditary ectodermal dysplasia? A. Salivary glands. B. Teeth. C. Sweat glands. D. Hair. E. Fingernails.,A. Salivary glands. A bite-wing radiograph of tooth 1.4 reveals caries penetrating one third into the mesial enamel. The most appropriate management of tooth 1.4 is to A. place an amalgam restoration. B. place a porcelain inlay. C. place a direct composite restoration. D. apply fluoride and improve oral hygiene.,D. apply fluoride and improve oral hygiene. The smear layer created by root canal instrumentation can be removed by A. hydrogen peroxide and ethyl chloride. B. sodium hypochlorite and EDTA. C. chlorhexidine and chloroform. D. calcium hydroxide and pheno,B. sodium hypochlorite and EDTA. Desquamation of the gingiva usually occurs as a result of A. inflammation. B. benign neoplasia. C. normal cell turnover. D. a developmental abnormality.,C. normal cell turnover. Abrasion is most commonly seen on the A. lingual surface of posterior teeth. B. occlusal surface of posterior teeth. C. incisal edges. D. facial surfaces of teeth.,D. facial surfaces of teeth. The most appropriate management of an avulsed maxillary central incisor in a 10 year old is the placement of a A. removable space maintainer. B. bonded resin bridge (Maryland bridge). C. conventional fixed partial denture. D. single tooth implant.,A. removable space maintainer. In the surgical removal of an impacted mandibular third molar, which of the following would be considered to be the most difficult?