Description : Which of the following Gold casting alloys are available: A. Medium alloy “Type II” B. ard alloy “Type III” C. Extra ard alloy “Type IV” D. All of the above
Last Answer : D. All of the above
Description : Titanium is used in dentistry A. In a very pure form in implants B. In an alloy with aluminium in casting for crowns and bridges C. In an alloy with nickel in orthodontic wires D. A and B E. A, B and C
Last Answer : E. A, B and C
Description : The contraction of gold alloys on solidifying is approximately: A. 0.5% B. 2.5% C. 1.40% D. 3%
Last Answer : C. 1.40%
Description : The type of gold that is used for dental bridges is, A. Hard 18% B. Type IV 75%
Last Answer : B. Type IV 75%
Description : What sort of alloys do you use for bridges: A. Ductile B. Hard C. High sensitivity
Last Answer : B. Hard
Description : Two alloys contain platinum and gold in the ratio of 1:2 and 1:3 respectively. A third alloy C is formed by mixing alloys one and alloy two in the ratio of 3:4. Find the percentage of gold in the mixture a) 79.2/7% b) 71.2/7% c) 73.2/7% d) 71.3/7% e) None of these
Last Answer : Answer: D Platinum = 1/3 and 1/4 gold = 2/3 and 3/4 Alloy one and two are mixed in the ratio of 3:4, so ratio of platinum and gold in final ratio – 2:5 So gold % = (5/7)*100 71.3/7%
Description : In regard to indirect compared to direct wax technique, what characteristics must the wax have:** A. Low temperature solidifying point B. Hard in room temperature C. Higher flow in room temperature
Last Answer : B. Hard in room temperature
Description : Zinc is not used (A) For producing zinc base die casting alloys (B) In its oxide form as pigments (C) As anode for corrosion prevention in boiler (D) As an alloying element in various bronzes
Last Answer : (D) As an alloying element in various bronzes
Description : High content copper amalgam . . . a. generally requires greater energy to accomplish trituration b. should be placed rapidly in large increments c. Continues to leak since the ... not cause galvanism in oral environment e. is equally effective as conventional alloys in clinical studies
Last Answer : a. generally requires greater energy to accomplish trituration
Description : The less mercury remaining in condensed amalgam: A. The stronger the restoration which contains fewer matrix alloys and fewer voids B. The weaker the restoration C. The more matrix alloys D. The more voids E. None of the above
Last Answer : A. The stronger the restoration which contains fewer matrix alloys and fewer voids
Description : Why can Class IV gold not be used in cavity as a filling material: A. Can not be polished “burnished” B. The corrosive properties
Last Answer : A. Can not be polished “burnished”
Description : A partial denture that seats on the master cast but fails to seat correctly in the mouth is a result of, A. Contraction of the metal framework during casting B. Insufficient expansion of the investment material C. Distortion of impression D. Failure to block out unwanted undercuts
Last Answer : C. Distortion of impression
Description : A crown casting with a chamfer margin fits the die; but in the mouth the casting is open approximately 0.3mm. A satisfactory fit and accurate physiological close of the gingival area of the crown ... the crown E. Relieving the inside of the occlusal surface of the casting to allow for further
Last Answer : D. Making a new impression and remaking the crown
Description : The setting expansion of casting investment is approximately A. 0 to 0.1% B. 0.1 to 0.5% C. 0.5 to 1% D. 1.1 to 1.6%
Last Answer : B. 0.1 to 0.5%
Description : In regard to dentinogenesis imperfecta on x-rays, what is TRUE: A. Short and blunted roots B. The pulp canal is obliterated C. Big pulp chamber, thin dentine and normal enamel D. Type III, characteristic shell teeth E. All of the above
Last Answer : E. All of the above
Description : Patient with class II division II; the lateral incisor is missing. You want to make a fixed bridge which of the following is suitable: A. Rocket bridge using central incisor as abutment ( ... al Maryland B. Cantilever using central incisor C. Fixed bridge using the central incisor and bicuspid
Last Answer : B. Cantilever using central incisor
Description : A large amalgam core is to be condensed around several pins in a vital molar tooth; what type of amalgam mix would you prefer: A. A large mix to ensure homogeneity B. A large with ... small mixes with varying mercury/alloy ratios E. A basic mix to which additional mercury is added as needed
Last Answer : C. Several small mixes, sequentially triturated
Description : Which of the following alloys does not contain nickel? (A) Chlorinet - 2 alloy (B) Monel (C) Inconel (D) Babbitt metal
Last Answer : (D) Babbitt metal
Description : Which of the following alloys does not contain nickel? (A) Chloro, et-2 alloy (B) Monel (C) Inconel (D) Babbitt metal
Description : Which of the following is not an alloy of nickel and chromium? (A) Inconel (B) Hastelloy (C) Nimonic alloys (D) Duralumin
Last Answer : (D) Duralumin
Description : Monel alloy is (A) The costliest of all the alloys of nickel (B) Not suitable for making kitchen utensils (C) Used for making steam valves and turbine blades as it resists steam attack at high temperature (D) Not used in cast and wrought forms
Last Answer : (C) Used for making steam valves and turbine blades as it resists steam attack at high temperature
Description : The shaft are made of (a) Mild steel (b) alloy steel (c) Cooper alloys (d) Any of these
Last Answer : (d) Any of these
Description : The shafts are made of a. mild steel b. alloy steel c. copper alloys d. cast iron.
Last Answer : d. cast iron.
Description : Consider two alloys A and B. 50 kg of alloy A is mixed with 70 kg of alloy B. A contains brass and copper in the ratio 3 : 2, and B contains them in the ratio 4 : 3 respectively. What is the ratio of copper to brass in the mixture? A) 8 : 5 B) 7 : 5 C) 5 : 11 D) 4 : 9 E) 5 : 7
Last Answer : Answer: E Brass in A = 3/5 * 50 = 30 kg, Brass in B = 4/7 * 70 = 40 kg Total brass = 30+40 = 70 kg So copper in mixture is (50+70) – 70 = 50 kg So copper to brass = 50 : 70=5:7
Description : .In minor oral surgery which is TRUE in regard to antibiotics: a. Amoxil is satisfactory against most oral infection. b. Metronidazole and Amoxil have the same penetrating power. c. It is evident that it will reduce post operative swelling.
Last Answer : a. Amoxil is satisfactory against most oral infection.
Description : In regard to Benzodiazepines: a. Increases R.E.M. sleep. b. Has a hangover effects because of active metabolism. c. Includes carbamazepine. d. Can be used safely on children as it achieves reliable effects.
Last Answer : b. Has a hangover effects because of active metabolism.
Description : Which of the following is false in regard to Cleft. Palate? a. May be submucous. b. More common in males than females c. Predispose to speech defects, orthodontics problem and hearing loss. d. Patients are more likely to have cardiovascular defect than the general population.
Last Answer : b. More common in males than females
Description : In regard to Universal currete what is true? a- You can use both ends equally. b- You can use one end only. c- Angle of shank and blade is 70 degrees. d- You can use it for specific area. e- It has very rigid handle.
Last Answer : a- You can use both ends equally.
Description : Which of the following is true in regard to smoking, A. Smokers keratosis is common but metaplasia activity is not recognised B. Redox potential is increased resulting in aerobic bacteria C. Tissue perfusion is decreased resulting in increased infection
Last Answer : A. Smokers keratosis is common but metaplasia activity is not recognised
Description : What is correct in regard to high copper amalgam, A. Reacts and strengthens the amalgam by its dispersion properties B. Reacts to form copper-tin phase thereby eliminating the tin-mercury ... thereby eliminating the silver mercury phase D. Reacts and strengthens the amalgam by its grain diffusion
Last Answer : B. Reacts to form copper-tin phase thereby eliminating the tin-mercury phase
Description : In regard to colour, what does Chroma stand for, A. Degree of saturation of hue B. Brightness C. Value D. Contrast
Last Answer : A. Degree of saturation of hue
Description : In regard to periapical lesions, what is TRUE: A. Are predominantly anaerobic B. Must be treated by antibiotics C. Must always treated by surgery
Last Answer : A. Are predominantly anaerobic
Description : What is TRUE in regard to Basal Cell Carcinoma A. Metastasis is common B. Erodes bone C. More common in oriental races D. Cannot occur in oral mucosa according to definition
Last Answer : D. Cannot occur in oral mucosa according to definition
Description : What is TRUE in regard to oral lesions of reticular lichen planus: A. Never accompanied with skin lesions B. Always accompanied with skin lesions C. Lesions may present anywhere D. Lesions may present on legs E. Lesions may present on arms
Last Answer : D. Lesions may present on legs E. Lesions may present on arms
Description : In regard to shade, chroma is: A. Brightness B. Saturation of hue C. Value
Last Answer : B. Saturation of hue
Description : In regard to marginal leakage in amalgam: A. The wider the gap the better the chance of secondary caries B. Seal the margin with fissure sealant would prevent further breakdown C. Secondary caries may develop
Last Answer : A. The wider the gap the better the chance of secondary caries
Description : What is CORRECT in regard to the periodontal surface area in mandibular teeth: A. First molar> first premolar> second premolar (max) B. Canine> first premolar> second premolar. (max) C. Canine> lateral incisor> central incisor
Last Answer : C. Canine> lateral incisor> central incisor
Description : What is TRUE in regard to the preparation of occlusal rests: A. Use an inverted cone bur B. Use a flat fissure bur C. Parallel to occlusal plane D. At right angle to the long axis of tooth E. None of the above
Last Answer : E. None of the above
Description : In regard to apically displaced flap, what is TRUE: A. Does not preserve attached gingivae B. Does not lengthen crown of tooth C. Is a pocket elimination procedure D. A & C
Last Answer : C. Is a pocket elimination procedure
Description : In regard to external resorption:** A. Continues after successful endo treatment B. Stops in most cases following successful endodontic treatment C. Continues only in mandibular incisors after ... D. Stops in maxillary lateral incisors after successful endodontic treatment E. None of the above
Last Answer : B. Stops in most cases following successful endodontic treatment
Description : In regard to the enamel surface: A. It is a perfect substance for bonding B. It does not conform to the bonding requirements C. It is the most inorganic, rough part D. It is free from contamination and roughness E. None of the above
Last Answer : B. It does not conform to the bonding requirements
Description : In regard to Plummer-Vincent syndrome or “Paterson and Kelly syndrome”: A. Iron deficiency is a feature B. Atrophic oral and gastric mucosa C. Dysphagia and angular cheilitis D. Predisposing oral cancer E. All of the above
Description : What is wrong in regard to (water jet spray) hydrotherapy: A. Does not harm gingivae B. Removes plaque C. Removes required pellicle
Last Answer : B. Removes plaque
Description : In regard to third molar surgery: A. Maximum swelling is seen after 24-48 hours B. Prophylactic antibiotic will reduce swelling C. Antibiotic cover is compulsory
Last Answer : A. Maximum swelling is seen after 24-48 hours
Description : In minor oral surgery, what is TRUE in regard to antibiotics: A. Amoxil is satisfactory against most oral infections B. Metronidazole and Amoxil have the same penetrating power C. It is evident that it will reduce post operative swelling
Last Answer : A. Amoxil is satisfactory against most oral infections
Description : What is NOT CORRECT in regard to the lingual nerve: A. It is posterior and medial to the inferior alveolar nerve B. It passes close to the mandibular 3rd molar C. It may be anaesthetised by the ... nerve block D. It provides supply to the lingual gingiva E. Supplies anterior 2/3 of the tongue
Last Answer : A. It is posterior and medial to the inferior alveolar nerve
Description : In regard to Benzodiazepines: A. Increases R.E.M. sleep B. Has a hangover effects because of active metabolism C. Includes carbamazepine D. Can be used safely on children as it achieves reliable effects
Last Answer : B. Has a hangover effects because of active metabolism
Description : In regard to Chlorhexidine mouth wash:** A. Is anionic ( opposite) B. Used in 0.02% concentration ( topical skin) C. Used in 0.12% concentration D. Penetrates the gingival crevice/pocket ( no)
Last Answer : C. Used in 0.12% concentration
Description : What is true in regard to lateral mandibular incisors A. 20% have 2 canals with one foramen B. 20% have 2 canals with two foramina C. 40% have two canals with 10% ending in two foramina D. 40% have two canals with only one ending in two foramina
Last Answer : D. 40% have two canals with only one ending in two foramina
Description : Which is correct in regard to shade selection of crowns: A. It should be selected before starting preparation B. Chroma is the lightness/darkness of colours C. Value is the colour itself D. Hue is the concentration of colours
Last Answer : A. It should be selected before starting preparation