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KROK 2 Dentistry 2018 Questions | KROKEXAM
Browse 2018 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
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A 19-year-old young man complains of cosmetic defect of all his teeth, which developed immediately after the teeth eruption. Objectively on the vestibular and masticatory surfaces of all patient’s teeth there are enamel defects, tooth crowns present with dark brown discoloration. Percussion and probing are painful. In this area ?uoride levels in water are 2.6 mg/L. Make the provisional diagnosis:
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A 14-year-old teenager complains of dry and chapped lips especially in autumn and winter. Objectively the vermillion border is dry, infiltrated, and covered in numerous scales. Skin of the lips is dense, pigmented, with pronounced pattern, peeling, and radial cracks. At the same time the skin of the face is dry, lichenified, and excoriated. What is the provisional diagnosis?
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A 56-year-old patient suffering from exacerbation of schizophrenia has been hospitalized in an oral in-patient department with a diagnosis of the displaced mandibular fracture in the area of teeth 34 and 35. What method of treatment should be prescribed?
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During preventive examination a 5-yearold child was determined to have insuf?cient physiological attrition of the cusps of the deciduous canines. What treatment tactics should the doctor choose?
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A 60-year-old patient has been undergoing the procedure of checking the complete removable dentures construction and fixing teeth on wax bases. The following faws have been detected: fissure between the teeth on the frontal area and cusp-to-cusp contact in the lateral area. What mistake had been made?
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A 35-year-old man complains of sour sensation in his mouth and front teeth sensitivity to thermal and mechanical stimuli. Objective examination revealed visible changes in the enamel of 13, 12, 11, 21, 22, and 23. The enamel is dull, rough, missing on the cutting edge. Probing of the vestibular surface of these teeth is painful, response to thermal stimuli is positive. The patient’s medical record states his occupation in industrial production of inorganic acids. What is the most likely diagnosis?
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A 55-year-old man was delivered into the hospital with bilateral mandibular fracture within the dentition. Objectively teeth 34, 35, 36, 45, and 46 are missing. Lower incisors are mobile (I-II-degree). Fragment displacement is insignificant. What splint should be made forthispatient?
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A 30-year-old patient is diagnosed with acute suppurative odontogenic periostitis of the upper left jaw originating from tooth 23. The crown of 23 on the left is destroyed with caries by 1/3. Teeth 22 and 24 are intact. Spot?lm X-ray shows widening of the periodontal ?ssure of 23. What treatment would be the most advisable in this case?
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A 30-year-old patient complains of pain and swelling in the area of the left parotid salivary gland, which occurred 7 days after he had undergone abdominal cavity surgery. Objectively: body temperature is 39°C, reduced mouth opening, dry mouth; when the gland is massaged, there is purulent exudate being secreted from its duct. The patient can be diagnosed with the following disease:
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A 45-year-old man presents with facial asymmetry due to a dense isolated infiltration in his right buccal area; the skin over the infiltration is cyanotic, thinned out; in the center of the infiltration there is a fistula. In the oral cavity the crown of 46 is destroyed by 2/3, along the mucogingival fold the band connecting the tooth with the fistula can be palpated. Make the diagnosis:
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A 53-year-old patient complains of an ulcer on the lateral surface of the tongue. The ulcer appeared 6 months ago as the result of a trauma caused by sharp tip of the 37 tooth metal crown. A dentist replaced the crown with the one of better quality and prescribed keratoplastic drugs. Despite these measures the ulcer continues to grow. Lately there has been pain observed during talking, chewing, swallowing; sometimes the pain irradiates to the pharynx. Objectively on the lateral surface of the tongue there is a painful ulcer with uneven raised dense margins and lumpy ?oor with grayish necrotic coating. What is the most likely diagnosis?
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A 13-year-old child complains of periodical gingival bleeding during teeth brushing, which has been observed for half a year. Objectively the gingival mucosa in the frontal mandibular area presents with congestive hyperemia and edema. Decay-missing-?lled (DMF) index equals 4. Oral cavity hygiene is unsatisfactory. In this case it is necessary to recommend the patient the toothpastes with:
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A 70-year-old man has edentulous maxilla. Objectively maxillary tuberosity and alveolar processes are completely atrophied; palatine vault is ?at, its mucosal layer is moderately pliant. In this case the patient’s atrophic edentulous maxilla can be classified as:
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Teeth 71 and 81 erupted in a 6-year-old child, the lower jaw is retrogenic, the palate is ?at with pronounced cross-folds. Determine the condition of the oral cavity:
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A 12-year-old girl complains of pain in her mouth that occurs during eating. According to her medical history these symptoms reemerge once or twice per year. Objectively on the mucogingival fold there are 3 aphthae 5-7 mm in size, they have yellowish coating and in?amed red border and are acutely painful on touch. Name the most likely diagnosis:
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An 8-year-old girl complains of tooth 21 discoloration and pain response to hot stimulus. Several months ago tooth 21 was treated for acute diffuse pulpitis by means of vital amputation. Objectively tooth 21 is ?lled, percussion is painless. X-ray shows the rooth to be formed by 2/3, cortical plate of the tooth socket remains intact in the area of root radix. What material should be used for root canal ?lling in this case?
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The medical station of a regiment received a patient with signs of bilateral mandibular fracture. What is the main task of first aid in this case?
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A 35-year-old man has been hospitalized into a dentofacial unit with complaints of mobility of the 38, 37, and 36 teeth and a ?stulous tract in the socket of the extracted 35 tooth. The condition has been persisting for 3 months. Insertion of a grooved probe into the ?stulous tract palpated a bared coarse bone fragment that easily moved under pressure. X-ray of the lower jaw demonstrates a focus of bone tissue destruction, with a spot of dense bone tissue 0.5?0.3 cm in size. Make the diagnosis:
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A 10-year-old child complains of persisting throbbing pain in tooth 36, which appeared one day ago. Hot stimulus aggravates the pain, while cold mitigates it slightly. Objectively on the masticatory and medial surfaces of tooth 36 there is a deep carious cavity non-communicating with the dental cavity. Probing of the cavity bottom and percussion are painful. X-ray shows no pathologic changes of the periodontium. What treatment method shold be chosen in this case?
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A 11-year-old child complains of pain in the lower right lateral tooth, which occurs when eating, especially hot food. On the masticatory surface of the 46 tooth there is a large carious cavity ?lled with softened lightbrown dentin. The cavity is located within parapulpar dentin. In the projection of the medial buccal pulp horn the carious cavity communicates with the pulp chamber. Deep probing is painful. Electric pulp test - 60 microamperes. Make the diagnosis:
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A 7-year-old practically healthy child was undergoing the carious cavity preparation of tooth 46 due to acute median caries. During this procedure the mesio-buccal pulp horn was accidentally exposed. What treatment would be optimal in this case?
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A woman complains of pain in her gums, unpleasant smell from her mouth, dif?cult eating, general weakness, lowgrade fever. Objectively her gums are hyperemic, with areas of ulceration, covered in necrotic deposit. Microscopy revealed fusospirochetosis. Choose the medication for etiotropic treatment:
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A man complains of gingival bleeding that has been persisting for the last 2 years. Objectively he presents with chronic diffuse catarrhal gingivitis, teeth mobility is of the I degree, periodontal pockets are 2-3 mm deep with small amount of serous exudate, occlusion is markedly traumatic. X-ray shows damaged cortical plate, enlarged periodontal ?ssure in the apical areas of the interalveolar septa, osteoporosis, and interalveolar septa resorption by 1/3 of their height. Make the diagnosis:
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A 55-year-old man came to the prosthodontic clinic to have a denture made for him. Tooth 11 is missing in the patient. Two days ago he was released from the in-patient unit after a case of myocardial infarction. What tactics should the dentist choose?
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A 23-year-old man complains of acute gingival bleeding and unpleasant smell from the mouth that appeared 5 days ago. Objectively gingival papillae and marginal gingiva are friable, bright red, swollen, painful, and bleed profusely on palpation. Gingival pockets are 3 mm deep. X-ray shows marked osteoporosis of the interalveolar septa, periodontal ?ssure in the apical areas of the interalveolar septa is enlarged. Cortical plate is intact. Make the diagnosis:
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A 27-year-old patient has been referred by a prosthodontist for endodontic treatment of the 45 tooth. Objectively: the 45 tooth crown is destroyed; the lateral surface of the tongue and the buccal mucosa have patches of grayish macerated epithelium slightly protruding above the mucosa surface at the points of direct contact with the 45 tooth. The uvula and palatal bars are stagnantred in colour; hard palate has papulae surrounded with red margin and covered in grayish epithelium. The submandibular, cervical, supraclavicular, and subclavicular lymph nodes are enlarged and painless. What is the provisional diagnosis?
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A 6-year-old boy with congenital heart disease (pulmonary artery stenosis) presents with suppurative periostitis of the maxilla. The child needs surgical treatment. What unit should he be referred to?
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Parents of a 3-year-old child complain of food periodically getting into the child’s nasal cavity during feeding. Objectively there is a ?ssure in the area of the soft palate. Make the diagnosis:
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A 9-year-old girl complains of persisting pain in tooth 11 that one month ago sustained a trauma resulting in broken crown. The tooth received no treatment. Objectively the 1/4 of the tooth crown of 11 is broken off, the remaining crown is grayish, the dental cavity is not exposed. Percussion is acutely painful. The mucogingival fold is hyperemic and acutely painful on palpation. Make the diagnosis:
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A patient complains of fever up to 38°C, headache, pain in the joints anf muscles, vesicles in the oral cavity, mainly in the frontal part. Eating is sharply painful. For the last several years the disease has been recurring during wet and windy weather. The patient often suffers from cases of URTI. Objectively: on the buccal, lingual, labial mucosa there are con?uent erosions against the erythematous background, with gray-white coating. There are bloody scabs on the vermillion border and in the angles of the mouth. Make the diagnosis:
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A patient with complaints of toothache in the left upper jaw has made an appointment with a dental clinic. He was diagnosed with chronic periodontitis of the 24 tooth. What kind of anesthesia is necessary for painless extraction of the 24 tooth?
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A 2.5-year-old child is registered for regular check-ups with the orthodontist. The I stage of physiogical occlusion development corresponds with eruption of the following group of temporary teeth:
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Due to trauma of the area of teeth 44 and 45, a 12-year-old boy suffers from the pathologic displacement of the mandibular alveolar process and rupture of the alveolar process mucosa. What additional examination is necessary to specify the diagnosis?
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A 12-year-old child presents with temperature 38°C, chills, nausea, vomiting, delirium, and weakness. On the middle third of the face there is hyperemia in a butterfly-shaped pattern. Regional lymph nodes are enlarged and mildly painful. In blood: leukocytes - 12 × 109/l, lymphocytes 8.0×109/l, ESR - 26 mm/hour. What diagnosis should be made?
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X-ray of the patient shows a focus of bone destruction 3x4 cm in size in the mandibular body. The focus is structured as numerous small cavities different in size and shape and separated by septa. Tumor puncture yielded brown liquid. What is the most likely diagnosis?
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An orthodontist has been addressed by parents of a 5-year-old child. The child has the 54 tooth extracted, all the other deciduous teeth are present. The doctor made a thinwall crown for the 55 tooth with interdental wedge to the 53 tooth. What is the purpose of such treatment?
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Removable partial dentures for upper and lower teeth are being made for a 45-year-old man. Complete anatomical impressions were made using "Ypeen" alginate material. What should be used for disinfection of obtained impressions?
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A 48-year-old man complains of gingival overgrowth ("gums cover the teeth"). The patient suffers from epilepsy and takes anticonvulsant agents. Objectively gingival papillae are of normal color, dense, with lumpy surface; they do not bleed on probing and cover the lower front teeth up to their incisal surfaces. What is the most likely diagnosis?
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A 21-year-old man came to the dentist complaining of general weakness, muscle pain, body temperature up to 38.3°C, indigestion, excessive salivation, and rashes in the oral and nasal cavities, urethra, on the wings of the nose, and in the interdigital folds. These symptoms appeared after ingestion of milk during the patient’s stay in the village. What is the most likely diagnosis?
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A 28-year-old man complains of painless sore in his mouth that persists despite the attempts at self-treatment. Objectively the regional lymph nodes on the left are enlarged and painless. Mucosa of the left cheek presents with round ulcer, 1 cm in diameter, with raised margins and cartilage-like infiltration in its basis. The surface of the ulcer is colored meat red and painless on palpation. What is the most likely diagnosis?
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