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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 9-year-old boy has been diagnosed with a complete dislocation of the 21 tooth. The child got injured 20 hours ago. He has diabetes. Select a treatment tactics:
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Parents of a 7,5-year-old child brought him to the dentist for oral cavity sanitation. Objectively: DEF (for primary teeth) DMF (for permanent teeth) index = 4, Green-Vermillion index = 2,5. Fissures of the first permanent molars are open, intact, non-pigmented. What method of primary prevention of dental caries may be appropriate in this case?
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A 35-year-old patient complains of a significant enlargement of the upper lip and eyelids, which developed within a few minutes (during cleaning the house with a detergent). Objectively: there is an edema of the upper part of face, upper lip and eyelids. Palpation is painless. What disease are these symptoms typical for?
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A 25-year-old HIV-infected patient presented to a clinic of prosthetic dentistry seeking prosthetic services. What aseptic and antiseptic precautions should be taken?
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A 20-year-old patient got an injury. Objectively: the patient's chin and lower jaw up to the 34 and 45 teeth are missing. The 45, 46, 47, 48, 34, 35, 36, 37 teeth are stable. At what stage of medical evacuati- on the patient will get special medical aid?
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A 3-year-old child got an injury of the upper teeth as a result of a fall. Objectively: crowns of the 51 and 61 teeth are deep in the surrounding tissues with only their cutting edge visible, the gingival margin is hyperaemia, edematic. What is the treatment tactics?
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A 25-year-old patient complains of a light brown spot in the upper front tooth. Objectively: the 23 tooth has a single light brown spot in the precervical region. Probing shows smooth surface. The tooth is nonresponsive to cold and probing. What is the most likely diagnosis?
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A 45-year-old patient complains of a rapidly growing formation on his lower lip. Examination of the red border of lips revealed a greyish-red nodule with a hollow in the centre which is filled with corneous masses that can be easily removed. The nodule is painless, mobile. What is your provisional diagnosis?
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A 35-year-old man complains about pain in the region of the 38 tooth, painful deglutition, difficult mouth opening. What anaesthesia method will be optimal during operation on account of pericoronaritis?
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A 42-year-old patient complains about gingival pain, progressing gingival hemorrhage, increasing tooth mobility, halitosis. Objectively: gums are evidently hyperaemic, extremely edematic, they bleed easily on palpation. Tooth roots are exposed, parodontal pouches are 4-6 mm deep, and contain purulent exudate, there is also supragingival and subgingival dental calculus. II-III grade tooth mobility is present. Orthopantomogram shows resorption of interdental septa down to 1/2 of their height. What is the most likely diagnosis?
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A female patient applied to the oral surgery department and underwent radical maxillary sinusotomy with plastic repair of fistula through the alveolar socket of the extrated 27 tooth. Infiltration and all the peripheral block anaesthesias of the left upper jaw were performed with 6,0 ml of 2% lidocaine solution. 3 minutes later the patient registered double vision in her left eye, inability to close it. Which of the performed anaesthesias is the reason for the above-mentioned presentations?
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A boy is 10 years old. His face is symmetric and proportional. He presents with mouth breath. Examination of the oral cavity revealed saddle-like shape of dental arches and high arched palate. Upper first molar relationship (Angle's key to occlusion) remains intact. What is the most likely diagnosis?
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A 51-year-old lecturer presented to the orthopaedic department and complained about painfullness and mobility of his frontal teeth of the lower jaw. Cervices of the 42, 41, 31, 32 teeth are exposed, III grade mobility with deep pathological pockets is present. When would it be reasonable to fix dentures after dental extraction?
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A 5-year-old child complains of spontaneous pain in an upper jaw tooth on the right that is getting worse at night and during eating cold food. Objectively: the 65 tooth has a deep cavity communicating with the tooth cavity. Probing is painful, percussion is painless. Cold water causes long-standing pain. What is your provisional diagnosis?
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A 30-year-old patient complains about body temperature rise up to 39,0°C, a roundish infiltrate on his upper lip, general weakness. He has been presenting with these symptoms for 3 days. Objectively: a roundish infiltrate in the region of the upper lip 2,5 cm in diameter, the skin over the infiltrate is red with a necrotic core in the centre. The upper lip is hyperemic and edematic. What is the most likely diagnosis?
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A patient complains about paroxysmal upper jaw toothache on the left that is getting worse at night. Toothache intensifies also under stimulation and irradiates to the left eye and temple. Similar attacks were noted three months ago, the patient didn't undergo any treatment. Objectively: the 25 tooth has a deep carious cavity communicating with the tooth cavity. Probing causes acute pain at the point of communication, vertical percussion is slightly painful, horizontal one is painless. Mucous membrane in the projection of root apex of the 25 tooth is unchanged, its palpation is painless. Thermal probe causes acute pain, the pain attack is long-lasting. Electroodontodiagnosis is 60 microampere. X-ray picture shows a slight widening of periodontal fissure at the root apex of the 25 tooth. What is the most likely diagnosis?
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A 48-year-old woman complains of aching dull pain in the region of the left TMJ, that is getting worse during eating solid food. The pain appeared about 2,5 years ago. Objectively: mouth opening is limited, there is sideward deviation of jaw during mouth opening, TMJ is clicking. Examination of the oral cavity revealed secondary partial adentia. X-ray picture shows sclerosis of the cortical plate of articulat head and narrowing of cartilage space. What is the most likely diagnosis?
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An oral surgeon attended a 3-day-old child staying in the newborn pathology department. Objectively: bilateral hypogenesis of zygomatic bones and orbits, antimongoloid slant of palpebral fissures, nonclosure of inferior eyelids, hypogenesis of mandible (bird face), deformity of auricles with a preauricular fistula on the right. What congenital disease does the child have?
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A pregnant 24-year-old woman complains about emergence of several new carious cavities, falling out of old fillings. Objective examination revealed: index of decayed, missing and filled teeth (DMF) = 16, Feodorov-Volodkina hygiene index is 3,3. Choose the optimal material for carious cavity filling in this case:
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A patient with a missile wound of face was delivered to the station of dental aid group that was organized by order of medical corps commander. What kind of aid can be rendered by the dental aid group?
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A 62-year-old patient has a median fracture of mandible along with formation of a false joint. Objectively: dental formula is 33, 34, 35, 36, 27, 47, 46, 45, 44, 43. The teeth are intact, stable, with high crowns. Fragment mobility is insignificant, there is no displacement. X-ray picture shows a bone defect 0,8 cm large. What prosthesis is indicated?
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After supercooling a 42-year-old patient presented with headache in the left frontal region and left upper jaw. Objectively: the face is symmetric, breathing through the left nasal meatus is obstructed, seropurulent discharges are present. Palpation is slightly painful in the infraorbital region as well as along the mucogingival fold in projection of the 24, 25 teeth. Percussion of these teeth is painless. The 24 tooth is filled. Mucuous membrane of alveolar process has no visible changes. X-ray picture shows reduced pneumatization of the left upper jaw sinus. What is the provisional diagnosis?
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An 8,5-year-old child is apparently healthy. The child complains of pain in an upper tooth on the left caused by a traumatic injury sustained three hours ago. Objectively: the crown part of the 21 tooth is destroyed by 1/2, the pulp is red and significantly exposed, probing causes acute pain and bleeding. Percussion of the 21 tooth is extremely painful. Choose the most efficient treatment method of the 21 tooth:
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A 23-year-old patient complains of root exposition, gingival hemorrhage during tooth brushing, gum itch. Objectively: there is supragingival and subgingival dental calculus. Gums are hyperaemic, edematic, pockets are 3,5 mm deep. X-ray picture shows resorption of interalveolar septa by 1/3. What is the most likely diagnosis?
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A 14-year-old child complains about acute spontaneous pain in an upper jaw tooth on the right. The pain has been lasting for 3 days, it is throbbing, irradiating to the temple, getting worse at night. Objectively: surface of the 15 tooth exhibits a carious cavity within parapulpar dentine. Dentine is softened, of greyish colour. Probing of the whole cavity floor is painful, percussion of the 15 tooth is painless. What is the most likely diagnosis?
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A 9-year-old boy presents with face asymmetry due to the chin displacement to the left. When the third Il'ina-Marcosian diagnostic test is performed, face asymmetry disappears. What is the most likely clinical form of this occlusal abnormality?
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A 65-year-old male patient complains of crepitation and clicking in both temporomandibular joints, pain induced by displacement of the lower jaw to the right, ear noise, dry mouth, glossalgia. He has been using complete removable prosthesis of the lower jaw for 6 months. The patient denies having rheumatosis. Objectively: the lower third of face is shortened, mental fold is strongly pronounced, mouth corners are lowered, there are angular fissures and cracks. Palpation reveals crepitatnt rale observed during TMJ moving. What is the most likely diagnosis?
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A 52-year-old patient complains of teeth mobility, gingival hemorrhage. The 44, 45, 34, 35 teeth exhibit I grade mobility, the 43, 42, 41, 31, 32, 33 teeth exhibit II grade mobility. There is gingival edema, peridontal pockets are 5-6 mm deep. X-ray picture shows destruction of bone tissue by 1/2 of root length. The patient has been diagnosed with generalized periodontitis of median severity. What orthopaedic construction is most efficient in this situation?
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It is planned to lance an abscess of hard palate (it is localized close to the 23, 24, 25 teeth) and to extract the causative 24 tooth that had caused abscess development. What type of anaesthesia is indicated for this operation?
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A 23-year-old patient complains about unpleasant sensations in the region of the 12 tooth, X-ray picture shows a well-defined low-density area up to 8-10 mm in diameter around the root apex of the 12 tooth. What method of surgery will be the most efficient?
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Examination of a 6-year-old boy revealed enlarged lymph nodes in both submandibular and cervical regions. Objectively: the 75, 84 and 85 teeth are decayed, there are presentations of commissural cheilitis. According to the boy's mother, he has been quickly getting tired, sweating from the least physical exercise, complaining about weakness throughout the last 2-3 months. He also gave up training in a sports class. What plan of additional examination should be adopted?
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A 12-year-old girl undergoes treatment at the maxillofacial department for nonodontogenic abscess of the left submandibular region. Postoperative wound in the stage of granulation and epi-thelialization. What medications speed up these processes?
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While conducting experiments in chemistry lesson a 14-year-old child got a traumatic shock of face. Objectively: the skin dehydrated in the affected region. It is covered with thick dry crust with clear boundaries and peripheral hyperaemia, the crust is recessed into the skin. What is the most likely traumatic agent?
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A 7-year-old child has to undergo plastic surgery of the upper lip frenulum. What operation should be performed to lengthen the frenulum of the upper lip?
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The 47, 46, 45, 35, 36, 37, 38 teeth of a 57-year-old patient are missing. It is planned to make a clasp denture. The 48 tooth inclines to the lingual side and forwards. On the lingual side of the 48 tooth the border line is diagonal, on the buccal side it runs on a level with gingival edge. What type of Ney's clasp should be applied?
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A patient complains about worsened fixation and frequent breakages of partial removable lamellar denture for the lower jaw that has been in use for 5 years. Objectively: alveolar part in edentulous regions is significantly atrophied, the denture balances. What is the most probable cause of worsened fixation and frequent breakages of the denture?
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A 15-year-old patient has got a trauma. He complains of mandibular pain getting worse during swallowing, chewing, especially mouth opening. Objectively: face configuration isabnormal, there is a large haematoma in the region of the right mandibular angle. Palpation of this region is painful. The mouth is half open, lower lip frenulum is shifted to the right of the central line. Pressing upon the chin causes pain in the part of mandible on the right. What is the provisional diagnosis?
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A 12-year-old boy has been injured. In the region of the 44 and 45 teeth there is pathological displacement of the alveolar process and the body of the mandible, rupture of the mucous membrane of the alveolar process. What additional tests should be done to specify the diagnosis?
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A 73-year-old patient consults a dental orthopaedist about total edentia. Objectively: there is insignificant regular atrophy of the alveolar process of mandible, the process is covered with mucous membrane of moderate elasticity. According to Keller's classification, such manifestations are characteristic for the folowing type of edentulous jaw:
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Intraoral examination of a 5-year-old child revealed primary occlusion, tremas and diastemas, worn tubercles and cutting surfaces of teeth. The distal surfaces of the second lower molars are anterior to the distal surfaces of the second upper molars. This stage of primary occlusion is called:
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