Description : A filter is used in x ray machines to: A. Reduce exposure time B. Remove low energy x rays
Last Answer : B. Remove low energy x rays
Description : Collimation is done to: A. Reduce the size of the beam, so it is easy to visualise the central X ray. B. Avoid unnecessary exposure to radiation of surrounding tissues of the patient
Last Answer : B. Avoid unnecessary exposure to radiation of surrounding tissues of the patient
Description : Exposure of the patient to ionising radiation when taking a radiograph is NOT REDUCED by: A. The use of fast film B. The addition of filtration C. Collimation of the beam D. The use of an open and lead lined cone E. Decreasing the kilovoltage KvP
Last Answer : E. Decreasing the kilovoltage KvP
Description : The beam that leaves the target is called, A. The primary X-ray B. The electrons ( from the cathode) C. The secondary rays (scattered radiation) D. X-ray photons no
Last Answer : A. The primary X-ray
Description : X rays are used in endodontic treatment to: A. Aid in the diagnosis of periapical hard tissue lesion B. Determine the number, location, shape, size and direction of roots and root canals C. Confirm ... root canals D. Evaluate the adequacy of the complete root canal filling E. All of the above
Last Answer : E. All of the above
Description : You wish to purchase a dental X ray machine and have the choice between 60kVp and 70kVp machines. With single change from 60kVp to 70kVp what would the approximate affects on exposure time?CHECK A. No effect B. Half the time C. Double D. Quarter E. Triple the time
Last Answer : B. Half the time
Description : A raised dot on X ray films is to: A. Orient exposure side B. Differentiate between left and right side C. Dip during developing
Last Answer : A. Orient exposure side
Description : On examination of an 8 years-old child you find 75 with carious exposure. On X-ray you find 35 missing. Your treatment is: A. Extraction of 75 allowing 36 to move mesially B. ... of 75 and place a fixed space retainer to be replaced with fixed bridge. D. Extraction of 65 and 75
Last Answer : B. Pulpotomy on 75 and wait indefinitely
Description : An upper deciduous molar has a caries exposure and on X ray the corresponding 2nd permanent premolar is absent. What treatment would you do to the deciduous tooth: A. Pulpotomy B. Endodontic treatment C. Pulp capping
Last Answer : B. Endodontic treatment
Description : Density of film is decreased by increasing the : A. MA B. Exposure time C. Developing time D. Rinsing time
Last Answer : B. Exposure time
Description : Several applications have been suggested to increase the effectiveness of prophylactic application of topical fluoride which include all EXCEPT: A. Increase Fluoride ions in solution increase concentration B. Increase ... D. Pre-treat enamel with 0.5% phosphoric acid E. Use NH4F instead of NaF
Last Answer : B. Increase PH of fluoride
Description : Several approaches have been suggested to increase the fixation of professionally applied topical fluoride, which of the following statements IS INCORRECT regarding increasing the fixation? A. Increase concentration of ... with 0.5% phosphoric acid E. Use NH4F rather than NaF at a lower PH
Last Answer : B. Raise the PH of the fluoride solution
Description : The inverse Square Law is concerned with intensity of radiation using type D film of 200mm target to film distance, the exposure time was 0.25s. What would be the exposure for the same situation with 400mm target to film distance? M07********** A. 0.5s B. 1.0s C. 2.0s D. 0.25s E. 0.125s
Last Answer : B. 1.0s
Description : What is the most important factor to reduces dental irradiation, A. Speed of film B. Collimation C. Filtration D. Cone shape and length
Last Answer : A. Speed of film
Description : Patient reported to you 30 min after trauma to central incisor. Patient is 10 yrs old and there is traumatic exposure of pulp. What will be the line of treatment- 1) coronal pulpotomy and Ca-hydr. ... 3) 1-2 mm. of coronal pulp extirpated and Ca hydroxide and then permanent filling 4) Pulpectomy
Last Answer : 3) 1-2 mm. of coronal pulp extirpated and Ca hydroxide and then permanent filling
Description : What is contraindicated to the use of calcium hydroxide for pulp capping: A. Accidental exposure of pulp B. Carious exposure of pulp in otherwise asymptomatic tooth C. Carious exposure of pulp in tooth that has been painful for weeks
Last Answer : C. Carious exposure of pulp in tooth that has been painful for weeks
Description : What contraindicates pulp capping: A. Accidental exposure on vital young molars B. When inflammation of radicular pulp is already present C. When roots are greatly curved and tortuous D. When anterior tooth is vital and immature with wide open apices E. None of the above
Last Answer : B. When inflammation of radicular pulp is already present
Description : During mouth preparation for RPD on tooth adjacent to edentulous area. There is dentine exposure: A. Restoration is required B. Proceed with rest seat preparation and fabrication if involved area is not more than 2mm
Last Answer : A. Restoration is required
Description : Attrition is,v A. Process of normal wear of teeth B. Lost of teeth substance as a result of chemical exposure
Last Answer : A. Process of normal wear of teeth
Description : Recession of gingiva of several anterior teeth caused by exposure and softened cementum; what would you do? A. Scrap the soften cementum and apply fluoride B. Scrap the soften cementum and use GIC C. Class V amalgam
Last Answer : B. Scrap the soften cementum and use GIC
Description : A child has sustained a traumatic exposure of primary central incisor, he presents to you for treatment two days after the injury. Which of the following should be considered? A. Pulpotomy and Ca(OH)2 B. Pulpotomy and formocresol C. Direct pulp capping D. Pulpectomy (RCT)
Last Answer : D. Pulpectomy (RCT)
Description : Which of the following would be ONE possible indication for indirect pulp capping?*** A. Where any further excavation of dentine would result in pulp exposure. B. Removal of caries has exposed the pulp C. When carious lesion has just penetrated DEJ
Last Answer : A. Where any further excavation of dentine would result in pulp exposure.
Description : Why do you take x-rays at different horizontal angulations A. To find more canals B. Tofind more foramina
Last Answer : A. To find more canals
Description : A child has less than the normal number of teeth, the mandibular lateral incisor is larger than usual, on x rays it shows with two roots and two roots canals; your diagnosis is:** A. Dilaceration B. Gemination C. Fusion D. Concrescence E. Taurodontism
Last Answer : C. Fusion
Description : Hypoplasia as seen in x rays:** A. Thick enamel surface B. Thin enamel surface C. Sometimes large pulp chamber D. Can not be detected on X rays
Last Answer : D. Can not be detected on X rays
Description : Essential for the diagnosis and treatment plan of orthodontics is: A. Classification B. X rays C. Plaster models
Last Answer : B. X rays
Description : At the age of four years, the x rays reveal calcification of: A. All deciduous and first permanent molars B. All permanent except of 3rd molars (7-8 yrs old) C. All deciduous D. All permanent
Last Answer : B. All permanent except of 3rd molars (7-8 yrs old)
Description : Bitewing x rays are taken to assist in the detection of caries :** A. Occlusally B. Lingually C. Buccally D. Gingivally E. Interproximally
Last Answer : E. Interproximally
Description : Proximal caries on x-rays appears: A. Smaller than clinically seen B. Larger than clinically seen C. The same
Last Answer : A. Smaller than clinically seen
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
Description : A blow to the mandible resulted in deviation to the left on opening; x-rays show unilateral fracture, where would you expect the fracture:** A. Neck of the left condyle B. Neck of the right condyle C. Body of the left condyle D. Body or the right condyley
Last Answer : A. Neck of the left condyle
Description : What does the fixing solution in developing X rays do: A. Removes unexposed silver halide crystals B. Removes exposed silver halide C. Fixes the developed film
Last Answer : A. Removes unexposed silver halide crystals
Description : Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam
Last Answer : B. Pulpectomy
Description : A 45 years-old patient awoke with swollen face, puffiness around the eyes, and oedema of the upper lip with redness and dryness. When he went to bed he had no swelling, pain or ... B. Angioneurotic oedema C. Infectious mononucleosis D. Acute maxillary sinusitis E. Acute apical periodontitis
Last Answer : B. Angioneurotic oedema
Description : When no radiation shield is available, the operator should stand out of the primary x ray beam and a distance from the patient’s head of at LEAST: A. 0.5 metres B. 1 metre C. 1.5 metres D. 2 metres E. 3 metres
Last Answer : Option C
Description : Conversion of a procarcinogen into a carcinogen often requires (A) Proteolysis (B) Microsomal hydroxylation (C) Exposure to ultraviolet radiation (D) Exposure to X-rays
Last Answer : Answer : B
Description : Why radiologists do not take direct Xray photographs of intestine? (1) Intestines are affected by direct exposure to X-rays (2) X-rays can not cross intestine (3) X-rays are not able to capture clear picture (4) Even short exposure of X-rays causes cancer in intestine
Last Answer : (3) X-rays are not able to capture clear picture Explanation: As the intestine is a soft tissue structure, it is not usually seen on a plain X-ray. By using barium to coat the inner lining ... tube will be inserted through your nostril or mouth and down into your stomach by the Doctor or Nurse.
Description : Why radiologists do not take direct X-ray photographs of intestine ? (1) Intestines are affected by direct exposure to X-rays (2) X-rays can not cross intestine (3) X-rays are not able to capture clear picture (4) Even short exposure of X-rays causes cancer in intestine
Last Answer : X-rays are not able to capture clear picture
Description : On an X ray you find the cement of the previous root canal treatment is extending 1mm beyond the apex without any symptoms; what would you do: A. Remove restoration material and retreat B. Apiectomy C. Leave as is until any complications occur
Last Answer : C. Leave as is until any complications occur
Description : On an X ray you find the Gutta Percha cone extending 1mm beyond the apex without any symptoms, what would you do: A. Remove restoration material until you are able to withdraw the Gutta Percha cone B. Apiectomy C. Leave as is until any complications occur
Description : A 8 years-old patient has 3 first premolars erupted and a swelling on the ridge of the un-erupted premolar. X ray shows a fully developed crown and ¾ roots development with no ... recision to allow eruption C. Soft tissues recision accompanied with orthodontic appliance to help with eruption
Last Answer : C. Soft tissues recision accompanied with orthodontic appliance to help with eruption
Description : What is the range of the visible light cure beam: A. 100-120 nm B. 200-300 nm C. 400-430 nm D. 470 nm or 450-500 nm
Last Answer : D. 470 nm or 450-500 nm
Description : Which one of the following factors is considered for the orientation of buildings? (A) The direction of the prevailing winds in the area (B) The exposure of the walls and roof of the buildings to the rays of sun (C) The extent up to which the sunrays penetrate with the verandah (D) All the above
Last Answer : Answer: Option D
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 : As far as surgical removal of wisdom teeth is concerned which of the following is true? a- Prophylactic prescription of antibiotic reduces dramatically the chances of infection. b- Raising a lingual ... e- The use of vasoconstrictors in local anaesthetics will increase the chances of infection.
Last Answer : b- Raising a lingual flap will increases the incidence of neurapraxia but will reduce the incidence of neurotmesis with respect to the lingual nerve.
Description : A patient on the dental chair has cardiac arrest. What is INCORRECT, A. Observing the vital signs and check that the air way is clear is at high importance B. Expired air has 15% O2 only, ... D. Intermittent positive pressure is better than mouth to mouth when it has been given at the same rate.
Last Answer : C. Intermittent positive pressure at the rate of 40/min will reduce the chances of cerebral hypoxia
Description : The initial condylar guidance of 25 degrees was wrong and is changed to 45 degrees. What changes will you make to achieve balanced occlusion: A. Decrease incisal guidance B. Reduce cusps height C. Increase compensation curve
Last Answer : C. Increase compensation curve
Description : How much would you reduce a cusp to be replaced with amalgam onlay: A. 2 mm to achieve a good retention form B. 2mm to achieve a good resistance form C. 1mm
Last Answer : B. 2mm to achieve a good resistance form
Description : What effect do fissure sealants have on caries progression: A. Reduce new caries and hamper the progress of freshly established caries B. Reduce new caries and hamper the progress of existing caries
Last Answer : B. Reduce new caries and hamper the progress of existing caries
Description : The cervical finish line of a full veneer crown preparation should be placed: A. Just supragingival whenever is possible B. According to the depth of gingival crevice C. Subgingival to reduce ability of recurrent caries D. At the junction of tooth and amalgam core
Last Answer : A. Just supragingival whenever is possible