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KROK 2 Dentistry 2012 Questions | KROKEXAM
Browse 2012 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
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A 70-year-old patient complains of pain in the lower jaw region on the right. He has been using complete removable dentures for the upper and lower jaw for 12 years. He is smoker. Objectively: the right retromolar region exhibits a 1,5x1,2 cm large proliferation of mucous membrane in form of cauliflower, here and there there are dense fissurelike ulcers. The surrounding mucous membrane is cyanotic, infiltrated. When the teeth are closed, the mentioned formation contacts with the posterior edges of the dentures. What is the provisional diagnosis:
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A 40-year-old patient complains of discoloration of the vermilion border of the lower lip that he noticed about 4 months ago. Objectively: in the center of the vermilion border of the lower lip there is an irregular homogeneous grayish-white area 1x1,5 cm large that doesn't rise above the vermilion border and has distinct outlines. Palpation of this area is painless, the surrounding tissues are not changed. The film cannot be removed when scraped. The 31, 32,41,42 teeth are missing. What is the most likely diagnosis?
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A 35-year-old patient complains about itch, burning and edema of lips. He has been suffering from this for a week. Objectively: reddening of vermilion border and skin, especially in the region of mouth corners, there are also vesicles, crusts, small cracks along with erythematous affection of vermilion border. What is the most likely diagnosis?
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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 (1x1,5 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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Preventive examination of an 8-year-old boy revealed some lusterless chalklike spots on the vestibular surface of the 11 and 21 teeth, which are localised in the precervical region. Subjective complaints are absent. What is the most likely diagnosis?
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A 44-year-old male patient complains of fatigue and headache, limb numbness, dry mouth, burning and pain in the tongue. Objectively: skin and oral mucosa are pale. There are painful cracks in the corners of mouth. Dorsum of tongue is smooth, glossy, with bright red striae. In blood: Hb- 70 g/l, RBCs - 1,5 × 1012/l, color index - 1,6, leukopenia, thrombocytopenia, lymphocytosis. What is the most likely diagnosis?
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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 27-year-old patient complains about acute pain in the region of the 34 tooth that is getting worse when biting down on food. Roentgenographical survey revealed an ill-defined zone of bone tissue destruction in the periapical region of root of the 34 tooth. What is the most likely diagnosis?
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A 48-year-old patient complains of subfebrile temperature and a growing ulcer on the gingival mucosa around the molars; looseness of teeth 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 sometimes 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 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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A 4-year-old girl complains of spontaneous acute toothache in the upper jaw on the right increasing during eating. The pain arose two days ago. Objectively: there is a deep carious cavity filled with softened dentin in the 55 tooth. There is no intercommunication with the tooth cavity. Probing of the cavity floor is slightly painful. Percussion is painful. What is the presumptive diagnosis?
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A 35-year-old man complains of shortterm pain caused by thermal stimuli in the 46 and 47 teeth. Objectively: masticatory surfaces of the 46, 47 teeth are intact, approximal surfaces could not be examined because of a very close arrangement of teeth. What methods of study can be used in this case if you suspect the presence of hidden cavities?
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A 52-year-old man undergoes treatment of the 36 tooth for chronic periodontitis. Radiography revealed convoluted medial root canals; an irregular-shaped focus of destruction of bone tissue 0,2x0,2 cm large in the region of the medial root apex. Which of the following drugs is optimal for intracanal electrophoresis?
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A 44-year-old patient consulted a surgeon about constant acute pain in the upper jaw region on the left that is getting worse during teeth joining. The pain was noted 3 days ago. Objectively: the face is symmetrical, mouth opening is unlimited. The crown for the 26 tooth is half-destroyed. Probing of the carious cavity is painless. Percussion of the 26 tooth provokes acute pain. Mucous membrane of the alveolar process is edematic, hyperaemic at the level of the 26 tooth. The 26 tooth had been treated before. What is your provisional 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 was 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 18-year-old patient complains of acute spontaneous toothache irradiating to the right eye and temporal region. Objectively: there is a deep carious cavity in the 27 tooth within circumpulpar dentin. Dentin is light, softened. Probing of the cavity floor and cold test cause acute pain. What is the most likely diagnosis?
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A 43-year-old patient was found to have no crown of the 13 tooth. The root protrudes above the gum by 0,5-1 mm. The apical part is filled. History: coronal part of the tooth broke off three weeks ago. Prior to this the tooth had been treated for chronic periodontitis. Percussion is painless. The root edges are made by hard moist mucous membrane of pale pink colour. Specify the dentist's tactics:
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A 40-year-old patient with mandible fracture consulted a doctor 3 weeks after immobilization of fragments because of pain and body temperature rise. Objectively: a slight swelling in the mental region, mucous membrane of alveolar process in the area of the 21|12 teeth is hyperaemic, edematic, palpatory painful. Overtooth splint on 54321|12345 teeth is in satisfactory condition, no occlusion abnormalities were detected. The patient was diagnosed with acute purulent periostitis of mandible. What surgical action is indicated?
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A 32-year-old patient complains of acute spontaneous attacks of pain in the 14 tooth. The pain lasts for 10-20 minutes and occurs every 2-3 hours. Carious cavity in the 14 tooth is filled with softened dentin. Probing of the cavity floor is painful at one point. Cold stimulus causes pain. What is the most likely diagnosis?
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A 32-year-old patient complains of the long-term dull toothache caused by hot food. The toothache appeared a month ago. Objectively: the 26 tooth has changed in colour, on the masticatory surface there is a deep carious cavity communicating with the tooth cavity. Superficial probing of pulp is painless, deep probing is painful. Electro-odontodiagnostics results: 85 /iA. What is the most likely 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, getting worse 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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A 5-year-old child has been diagnosed with congenital complete nonclosure of soft and hard palate. What type of anaesthesia is indicated for uranostaphyloplasty?
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A 24-year-old patient complains of aching pain in the 11 tooth that is getting worse on biting. Two days ago the tooth was filled for pulpitis. Objectively: the 11 tooth is filled. The thermal test causes no pain, vertical percussion is slightly painful. X-ray picture of the 11 tooth shows that the endodontic filling is 1 mm above the root apex. Which of the following methods will be most effective for eliminating this complication?
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It is planned to make a metal-ceramic crown supported by stump inlay for the 23 tooth. Objectively: the crown of the 23 tooth is decayed down to the gingival edge. Root canal is filled to the top. The dentist made a wax stump model with a pin, cast it in metal, fitted it to the tooth, fixed it by means of visphat-cement and got a working plaster impression. At what stage did he make an error?
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A 23-year-old military servant needs orthopaedic treatment at a specialized hospital. He was diagnosed with false joint of mandible in its frontal part. The teeth are intact, stable, in threes on each side. Orthopaedic treatment by means of a bridge denture will be possible only if the jaw defect is no more than:
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According to the mother, a 5-year-old child complains about pain during swallowing, weakness, body temperature rise upt to 39,5°C, swelling of submental lymph nodes. Objectively: the child's condition is grave, body temperature is 38,8°C. Mucous membrane of oral cavity is brightly hyperaemic and edematic with hemorrhages and ulcerations. Pharynx is brightly hyperemic, lacunae are enlarged and have necrosis areas. Regional, cervical, occipital lymph nodes are painful, enlarged and dense. What is the most likely diagnosis?
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A patient is 48-year-old, according to the results of clinicoroentgenological examination it is indicated to remove the 26 tooth because of acute condition of chronic granulomatous periodontitis. What kind of conduction anesthesia is indicated for this operation?
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Examination of an 8-year-old child revealed irregular white spots on the vestibular surface in the precervical region of the of 11 and 12 teeth. The spots are smooth and stainable. What is the most likely diagnosis?
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A 45-year-old patient complains of missing teeth in the lower jaw on the right. Objectively: the 46, 45, 38, 48 teeth are missing. The 47 tooth is mobile (1 grade mobility), the crown of the 44 tooth is destroyed by 1/2. What orthopedic construction should be recommended for restoration of masticatory efficiency and prevention of periodontal overload of the 47, 44 teeth?
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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 patient working as a bricklayer complains of itching, burning, soreness of lips that show up only in the summer period. He has been ill for 3 years. Objectively: vermilion border of the lower lip is hyperemic, edematic, covered with blisters and painful erosions 2 mm in diameter, crusts, cracks. What is the most likely diagnosis?
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A 60-year-old patient complains of pain in the masticatory muscles and temporomandibular joints. The pain occurs when she uses complete removable dentures fabricated a month ago. Objectively: the lower third of the face is elongated, the lips can be closed with difficulty, smiling causes exposure of the denture base, the articulation is impaired. A mistake must have been made at the following stage of denture fabrication:
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A patient consulted a dentist about a cosmetic defect in the cervical region of the upper and lower canines. Various stimuli cause no pain. Objectively: there are V-shaped defects on the vestibular surface in the cervical area of the upper and lower canines. Their surface is smooth, shiny, hard. The reaction to probing and cold stimuli is absent. What treatment should be administered?
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A 57-year-old patient complains about dryness and burning of the lateral surface of her tongue. These sensations disappear during eating. She noted such sensations three months ago. She has a history of gastritis with reduced secretory function. Objectively: mucous membrane of tongue and oral cavity has no peculiarities. The back of tongue has thin white coating. Regional lymph nodes are unpalpable. Oral cavity is sanitized. What is the most likely diagnosis?
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A 65-year-old patient needs complete removable dentures for both jaws. At the stage of "testing the denture constructi-on"the doctor checks the pronunciation of sounds "S"and "Z". Which method of normalization of speech functions should be applied in this case?
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An 18-year-old man complains of the 14, 13, 12, 23, 24 teeth being sensitive to sweet and sour food. Examination revealed some isolated ill-defined chalky spots in the precervical region. What is the most informative method of study that allows to confirm the diagnosis?
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Parents of a 12-year-old child complain of white patches on the upper front teeth, which appeared six months ago. Objectively: chalk-like patches on the vestibular surfaces in the precervical region of the 13,12,11,21, 22,23 teeth. Their enamel is dull, pliable and rough on probing. There is a history of short-term pain caused by chemical stimuli. What is your provisional diagnosis?
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A 32-year-old female patient needs dental prosthetics. After the objective examination it was decided to use ceramic-metal crown. What impression material should be used for taking impressions for this construction?
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A 55-year-old patient has a painless, tuberous, cyanotic pedunculated formation 2x1x1,5 cm large that appeared on the site of the extracted 46 tooth. Opening of mouth is not limited. Intra-oral X-ray picture of alveolar process in the region of the removed 46 tooth shows a focus of bone tissue destruction. What is the most likely diagnosis?
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A 52-year-old patient presented to the prosthetic dentistry clinic complaining of missing upper jaw teeth and difficult mastication. The patient has an indication for a partial laminar denture for the upper jaw with retaining clamps on the 14, 23 teeth. What kind of denture stabili- zation will enable such positioning of the clasps?
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