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KROK 2 Dentistry 2016 Questions | KROKEXAM
Browse 2016 KROK 2 Dentistry exam questions with answers and explanations.
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A prosthodontist plans to make a porcelain-fused-to-metal crown for the 23 tooth. In order to correct its abnormal position in the dental arch the prosthododntist is going to use a cast post and core. What is the maximum permissible value (in degrees) of the core deviation from the tooth axis?
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What impression material is used to obtain impressions for making orthodontic appliances?
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A 45-year-old woman consults a dentist for prosthetics. Objectively: the 47, 46, 45, 35, 36, 37 teeth are missing. There is dentoalveolar vertical displacement of the 17, 16, 26, 27 teeth; the alveolar process is hypertrophied, the cervical margins are not exposed. When the teeth are closed, the distance between the occlusal surfaces of the teeth and alveolar process is approximately 6 mm. Specify the most efficient method of treatment of secondary deformation in this patient:
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A 35-year-old patient has made an appointment with a doctor to have oral cavity sanation. Objectively: the vestibular surface of the 22 tooth has a hard tissue defect localized in the mantle dentin; the dentin is hard, dark-coloured, the floor of the cavity is coarse. Cold stimulus and probing are painless. What is the most probable diagnosis?
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A 25-year-old female patient consulted a dentist about acute pain in the mandible on the right that occurs during eating. Objectively: the approximate distal surface of the 45 tooth exhibits a carious cavity filled with light softened dentin. Probing causes a minor pain response across the entire floor. Percussion causes no pain. Cold water causes transient pain. What is the most likely diagnosis?
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A 42-year-old patient complains of pain in the submaxillary and sublingual areas that aggravates during eating, body temperature rise up to 37,6°C. He has been suffering from this for 2 months. Objectively: infiltration along the right sublingual torus, hyperemia, soft tissue edema, acute pain during palpation. The duct of the right submandubular salivary gland excretes turbid saliva mixed with pus. What is the most likely diagnosis?
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A patient consulted a dental surgeon about fever up to 37,6°C, soft tissue swelling, pain in the 47 tooth on the lower jaw on the left, the pain aggravates when the tooth is touched by its antagonist. Objectively: mucogingival fold of the alveolar process is hyperemic and flat on the vestibular side of the decayed 47 tooth. What is the most likely diagnosis?
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A 12-year-old boy complains of a cavity in the tooth on the lower left jaw. Objectively: 1/3 of the 36 tooth is destroyed, the carious cavity opens into the dental cavity; reaction to cold stimulus is positive; probing and percussion are painless. X-ray imaging shows the periodontal fissure of the 36th tooth roots to be widened. What is the provisional diagnosis?
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A 5-year-old child has been diagnosed with chronic granulating periodontitis of the 85 tooth. What is the optimal material for the root canal filling?
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A patient complaining of constant dull pain in the 38 tooth has made an appointment with a dentist. Mouth opening is restricted to 1 cm. The patient is prescribed extraction of the 38 tooth. What kind of anesthesia should be administered?
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A 67-year-old patient consulted an orthodontist about missing of the 34, 35, 36, 37, 45, 46 teeth. Orthopantomogram of the remaining teeth shows the alveolar bone resorption in the range of 1/3 of the interdental septa height. What construction should be offered to the patient?
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A 22-year-old student complains of gingival hemorrhage during tooth brushing. Objectively: hyperemia and edema of marginal gingiva of the front teeth on both jaws, periodontal pockets are absent. X-ray reveals no pathological changes. What is the most likely diagnosis?
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A 32-year-old male patient complains of dryness and burning pain in the back of the tongue. The symptoms have been lasting for 1 week. The pain increases when spicy food is taken. A day prior to that the patient had suffered from pneumonia and had been taking antibiotics. Objectively: the skin and mucosa of oral cavity are pale. The tongue mucosa is hyperemic and swollen; there is crumbling grey-and-white coating in the folds of the back of the tongue; the lateral surfaces of the tongue are desquamated. The saliva is thick and drags in threads after a spatula. Choose the most effective drug complex for topical treatment:
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A 46-year-old patient complains of spontaneous pain in the 36 tooth. Its crown is decayed. The patient presented with edema of soft tissues adjacent to the mandible. Body temperature rose up to 39, 0°C, the patient has chill. Examination of the oral cavity revealed a pronounced edema of the left mandibular alveolar process on the vestibular and oral side (acute periostitis); the 35, 36, 37 teeth are mobile, subgingival pockets contain purulent exudate; their percussion causes acute pain. Positive Vincent’s symptom is present. What is the presumptive diagnosis?
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An 18-year-old student needs prosthetic porcelain-fused-to-metal denture for the 11, 21 teeth. There are no contraindications for the use of such construction. What is the most appropriate material for taking impressions?
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A20-year-old patient addressed a dentist for treatment of the destroyed teeth. Examination revealed round painless papulae with hyperemic infiltrated crown 7 mm in diameter on the palatine arches, soft palate, tonsils, tongue. Regional lymph nodes are enlarged, dense, elastic, painless and mobile. What tactics should a doctor choose?
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A week ago an 18-year-old girl complained of pain in the 22 tooth which was treated and filled several years ago. Over the past two days the pain increased. Objectively: the 22 tooth is filled, percussion is painful, mucous membrane is hyperaemic and edematic. Spot-film roentgenograph of the 22 tooth shows an ill-defined periapical bone rarefaction 0,4x0,5 cm large. What is the most likely diagnosis?
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A 22-year-old patient complains of a painful swelling in the right parotid gland. A week earlier the patient received a cheek abrasion that healed under the purulent crust. Over the past two days the patient had observed progressing pain and fever up to 38,6°C. Objectively: there is a soft tissue edema in the right parotid region, the skin is slightly strained but has not changed in colour. There is a dense painful infiltration 2,5x3,5 cm large, the skin over it exhibits limited mobility. The mouth can be fully opened, the mucous membrane around the orifice of the salivary duct is unchanged, the saliva is transparent. What is the most likely diagnosis?
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A 3-year-old girl complains of pain and swelling in the region of the decayed 51, 52 teeth, body temperature rise up to 37,5- 37,9°C. Objectively: the face is asymmetric because of a swelling in the upper lip region and right infraorbital region. The crown of the 51 tooth is completely decayed. Mucous membrane in the region of the 52, 51, 1 teeth is edematic, mucogingival fold is smoothed, palpation provokes pain, mobility of I-II grade of the 51, 52 teeth is also present. What is the most likely diagnosis?
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A 50-year-old patient has median lower jaw fracture with formation of a false joint. The 38, 32, 31, 41, 42, 48 teeth are missing. The remaining teeth are intact, stable. There is no displacement of lower jaw fragments. X-ray picture shows a bone tissue defect up to 1 cm large. What prosthesis is indicated?
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A 32-year-old patient has made an appointment with a dental surgeon to have oral cavity sanation performed prior to denture installation. During examination the doctor stated the following: the crown of the 25 tooth is destroyed. The tooth root is stable, and its percussion is painless. Mucosa of the alveolar process is unchanged. X-ray reveals slight widening of the periodontal fissure. What provisional diagnosis can be made?
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A 45-year-old man complains about liquid outpouring from his nose, inability to blow his nose, inflated cheeks. Objectively: there is a perforating defect (1?1,5 cm) of alveolar process at a level of the extracted 26th tooth in the lateral part of his upper jaw. Air inhalation through the nose with held nostrils is accompanied by generation of bubbles in the area of perforation. What denture construction should be recommended?
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A 25-year-old patient presents with fluorosis of vestibular surfaces of the upper incisors. Which of the following constructions will provide the maximum aesthetic result?
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A 6-year-old child complains of pain in the mandibular tooth on the left during eating. Objectively: masticatory surface of the 36 tooth exhibits a carious cavity within the mantle dentin. The cavity is full of light softened dentin which can be easily removed with an excavator. Probing of the cavity walls causes pain response. The teeth are sensitive to thermal stimuli, the pain is of short-term nature. There is no response to percussion. Select the optimal filling material:
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A 48-year-old patient complains of subfebrile temperature and a growing ulcer on the gingival mucosa around the molars; teeth mobility in the affected area, cough. Objectively: gingival mucosa in the region of the lower left molars has two superficial extremely painful ulcers with undermined edges. The ulcers floor is yellowish, granular, covered with yellowish and isolated pink granulations. The ulcers are surrounded by the tubercles. Dental cervices are exposed, there is a pathological tooth mobility. Regional lymph nodes are enlarged and make dense matted together groups. What is the most likely diagnosis?
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A 78-year-old patient is completely edentulous. He has been wearing dentures for 19 years. The patient complains of poor fixation of the upper denture. Objectively: the lower third of the face is shortened, the alveolar processes of both jaws aremarkedly atrophied, the palate is flat. Mucous membrane in the denture-supporting area is atrophied. How often should the dentures be remodelled or restored?
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A 56-year-old man complains of pain in the left parotidomasticatory region, progressing face asymmetry that was noticed a month ago. Objectively: left-sided paresis of mimic muscles. To the fore of earflap there is an ill-defined infiltration, the skin above it is tense and cyanotic; left lymph nodes are enlarged. Opening of mouth is limited down to 2,5 cm. The left parotid duct doesn’t excrete saliva. What is the most likely diagnosis?
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When a prosthodontist was preparing the patient’s tooth, the patient had epileptic seizure that was subsequently terminated. Whatmistake had beenmade by the doctor?
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A 13-year-old child complains of having a cavity in the front maxillary teeth. Contact medial surfaces of the 11 and 21 teeth exhibit cavities found within the mantle dentin and filled with dense pigmented dentin. Probing of the cavity floor causes no pain response, neither does dental percussion. Select the best filling material for the permanent seals:
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A 30-year-old patient complains of toothache caused by hot and cold stimuli. The pain irradiates to the ear and temple. Previously there was spontaneous nocturnal toothache. Objectively: on the occlusal surface of the 37 tooth there is a deep carious cavity communicating at one point with the tooth cavity. Probing at the communication point, as well as cold stimulus, causes acute pain. The pain persists for a long time. Electric pulp test result is 55 microamperes. What is the most likely diagnosis?
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An 11-year-old boy complains of a carious cavity in the mandibular tooth on the right. Objectively: the 46 tooth exhibits a carious cavity within the mantle dentin. The dentin is dense, pigmented; there is pain response to the cold stimulus; probing and percussion cause no pain response. Make the provisional diagnosis:
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During preventive examination an 11-year-old girl presents with slight hyperemy, cyanosis, swollen gums, gingival papilla are loose, not adjacent to teeth cervices. Fedorov-Volodkina dental hygiene index is 4 points. Schiller’s test is positive. Make the diagnosis:
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A 22-year-old medical student complains of the changed colour of his central upper incisor on the right. Two years ago the tooth became gray. Objectively: the 2 tooth is filled, changed in colour, stable, percussion is painless. The patient has closed bite. What is the absolute contraindication to making porcelain crowns for this patient?
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A 25-year-old patient complains of pain caused by eating sweet, hot and cold food; pain ceases, when stimulation stops.Objectively: the adjoining surface of the 36th tooth has a deep carious cavity localised in the circumpulpar dentin. The dentin is softened. Probing of the carious cavity floor is painful. What is the most probable diagnosis?
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A 27-year-old patient complains of the long-term pain in the 22 tooth caused by cold and hot food, as well as of spontaneous pain lasting for 30 minutes and occurring 3- 4 times per day, aggravating at night. Pain arose 3 days ago after preparation of the tooth for the acrylic crown. Objectively: the 22 tooth is intact, the thermal test causes acute long-lasting pain, percussion is painless. What is the optimal treatment tactics?
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An 11-year-old boy complains of a shortterm pain from the cold in the left mandibular tooth. Objectively: the medial surface of the 36 tooth exhibits a carious cavity within parapulpar dentin. The cavity is filled with light, softened dentin and does not communicate with the cavity of the tooth. Probing the of the 36 tooth floor causes pain response, the tooth is not sensitive to percussion, the response to the cold stimulus does not remain long after its removal. What is the most likely diagnosis?
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A 46-year-old patient after the recovery froma case of influenza has suddenly started suffering from pain in the 36 tooth, the crown of which had been destroyed. The soft tissues surrounding the lower jaw are swollen. There are high fever up to 39°C and chills. Objectively: there is prominent swelling of the left lower jaw alveolar mucosa (both oral and vestibular surfaces). The 34, 35 and 37 intact teeth are mobile. Percussion is painful. The gingival pockets produce purulent exudate. Vincent’s symptom is observed. What diagnosis can be suspected?
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A doctor treating an AIDS-positive patient has accidentally pierced his own skin of the palm with a root needle. What should be the first course of actions?
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A 57-year-old patient complains of tooth mobility, inability to eat. Objectively: the lower 35, 36, 37, 38, 44, 45, 46 and 48 teeth are missing; the 31, 32, 33, 34, 41, 42, 43, 47 teeth exhibit II grade mobility, their clinical crowns are low, tooth equator is not pronounced. What is the optimal denture construction in this case?
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A 7-year-old boy complains of increased body temperature up to 38°C, headache, sore throat. Objectively: there are erosions on the slightly hyperemic mucosa of the soft palate, anterior pillars of the fauces, tonsils. The submandibular lymph nodes are slightly enlarged, painless. Name the causative agent of this disease:
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