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KROK 2 Dentistry 2020 Questions | KROKEXAM
Browse 2020 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
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A 63-year-old man complains of pain in the area of maxillary mucogingival fold caused by using a removable laminar denture. Objectively, in the area of the mucogingival fold there is a trophic ulcer with swollen margins and hemorrhaging floor. Make the diagnosis:
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A 38-year-old man needs to have his tooth 12 extracted. What type of anesthesia should be used in this case?
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A woman came to the dental surgeon with complaints of teeth mobility. After objective examination and X-ray analysis she was diagnosed with generalized periodontitis of stages I and II. Which teeth of those affected by periodontitis should be extracted?
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An ambulance has delivered an 8-year-old child to an admission room. An oral surgeon has made the following diagnosis: odontogenic phlegmon of the right submandibular area. What surgical approach would be advisable for open treatment of this phlegmon"
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95-year-old child complains of destruction of an upper right lateral tooth. Objectively, the crown part of tooth 16 is destroyed and its dental cavity is exposed. Probing at the level of root canal entrances is slightly painful and provokes intensive hemorrhage. Percussion of the tooth is painless. Alveolar mucosa in the projection of the roots of tooth 16 has a fistula. Make the diagnosis:
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A 36-year-old woman needs a dental prosthesis. Objectively there is a carious cavity on the mesial masticatory surface of tooth 46, interdental contact is disturbed. A dental inlay is to be made for this patient. According to the Black’s classification of dental caries, this cavity is class:
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A 45-year-old man complains of pain and crepitation in the temporomandibular joint during the movements of the lower jaw. Objectively: the face is symmetrical, the mouth opens with slight displacement to the left. Dentition is intact. To clarify the diagnosis, X-ray of the temporomandibular joint was performed. Where should the heads of the mandible be located normally during maximum mouth opening?
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A 45-year-old man complains of pain and crepitation in the temporomandibular joint during the movements of the lower jaw. Objectively, the face is symmetrical, the mouth opens with slight displacement to the left. The dentition is intact. Occlusiography detected centric and eccentric supracontacts. What treatment methods should be used in the first place?
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A 45-year-old patient complains of itching gums, pain in the area of the 43, 42, 41, 31, 32, 33 teeth caused by chemical and thermal stimuli. Objectively: the gums are pale, no bleeding, the roots of affected teeth are exposed by 0,4 mm. The 43 and 33 demonstrate cuneiform defect. The teeth are intact. X-ray: regular resorption of interalveolar septa at 1/4 of their height. Make the diagnosis:
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A 10-year-old boy complains of sharp pain attacks in the area of his upper left teeth. The toothache persisted for a night. Objective examination revealed a carious cavity on the masticatory surface of tooth 26 within the parapulpar dentin. Probing is sharply painful at all points of the cavity floor. Markedly positive reaction to cold water stimulus is observed. Select the most likely diagnosis:
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The maxillofacial surgery unit received a patient with complaints of inability to close his mouth. This condition occurred when the patient was biting an apple. Objectively there is a frightened expression on the patient’s face, the mouth is open wide, the chin is displaced to the left, salivation is observed. Palpation through the external acoustic meatus detected no movements of the right articular head. What is the most likely diagnosis?
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Vestibular surfaces of the upper and lower incisors of a 27-year-old patient are affected by destructive form of fluorosis. What construction of a denture will provide the maximum aesthetic effect with minimum invasion?
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A patient is diagnosed with mandibular ameloblastoma. What type of surgery is recommended for this patient?
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After a tooth extraction, the patient developed a hemorrhage from the socket of the extracted tooth. What tactics should the dentist choose in this case?
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A 34-year-old man presents with a persisting dull pain in his tooth, which ageravates on biting. One week ago the tooth was treated for deep caries. Objectively on the masticatory surface of tooth 36 there is a filling, percussion is painful, there is a supracontact observed in the area of 36. X-ray shows unchanged periodontium. What mistake was made when tooth 36 was filled?
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A 19-year-old woman complains of aesthetic defects, dry lips, unpleasant sensation of strain in the lower lip and its constant peeling. The patient often bites her lips, rips and bites off peeling flakes, which sometimes results in bleeding; she notes her increased irritability. On examination there are numerous transparent scales between the red border and mucosa. The scales are tightly adjacent in the center and loose at the periphery. They can be easily removed, produce no erosion. Regional lymph nodes cannot be palpated. What diagnosis is most likely?
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Parents of a 6-year-old child complain of their child having a gradually enlarging neoplasm in the left parotid-masticatory region. Skin over the tumor is without discoloration. The tumor is painless, but when the head bends down the tumor increases in size and assumes bluish coloring. What disease can be suspected in the child?
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A 50-year-old man complains of bared dental cervices on his upper and lower jaws. Objectively: the teeth and dentition are intact, clinical crowns are elongated, the teeth have no pathologic mobility, are worn off within the physiological norm. To remove the supracontacts, it is planned to perform selective teeth shaving. What additional investigation is necessary in the given case?
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A 35-year-old patient undergoes treatment of chronic fibrous pulpitis of tooth 25. The canal is to be filled using the warm gutta-percha vertical condensation technique. What instrument is needed for gutta-percha condensation"?
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A 27-year-old woman complains of an aesthetical defect in the area of her upper central incisors. She was diagnosed with chronic deep caries, Black class IV. Aesthetic restoration of teeth 11 and 21 is planned. What material has optimal combination of strength and aesthetical properties?
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After extraction of tooth 46, a 41-year-old man noticed a dark defect on the distal contact surface of tooth 45. The defect is limited to the enamel, has blurred margins and dark brown color. The affected tissue crumbles when probed. Make the diagnosis:
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A 38-year-old man came to the maxillofacial surgery department. He complains of sudden elevation of his body temperature. There is a bright red spot on his skin that quickly spreads. Objectively it has uneven but clear flame-like raised margins. The affected skin is edematous, taut, hot to touch, and moderately painful at the periphery. Make the diagnosis:
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An 18-year-old girl, having returned from a summer vacation, developed complaints of a mild pain in the lips, her lips are dry and peeling. Objectively, her lower lip is bright-red, its red border is dry and covered in small silvery-white scales. What is the most likely diagnosis?
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After examination, a 6-month-old infant was diagnosed with a complete labial cleft. What surgical operation should be performed in this case to remove this defect?
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A 37-year-old man was prescribed an extraction of tooth 25 under a local anesthesia. Where should the doctor be positioned in relation to the patient during the extraction of tooth 25?
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A 21-year-old woman after a domestic accident presents with a fracture of the maxillary alveolar process in the area of teeth 13, 12, 11, 21, 22, and 23. What splint should be used for this fracture?
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A 56-year-old man during obtaining a full anatomical impression of the upper jaw with alginate mass developed acute dyspnea, pale skin, increased sweating, cyanosis, and wheezing respirations. What urgent condition developed in this case?
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A 32-year-old man was diagnosed with chronic granulomatous periodontitis of tooth 21. The doctor decided to perform the root apex resection. What filling material is optimal for hermetic isolation of the root canal?
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The lateral incisors of a child are rotated around their axis by 45°. Name this anomaly of tooth position:
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The parents of a 6-year-old child complain that their child for the last three days has been presenting with body temperature of 39°C, weakness, loss of appetite, pain on swallowing. Objectively, the mucosa of the tonsils, palatine arches, retromolar space, and posterior and lateral pharyngeal walls is swollen and covered in a dirty-gray coating that is tightly attached to the underlying tissues. The coating is very difficult to remove. When removed, it exposes a bleeding surface. The submandibular lymph nodes are enlarged and painful. What is the most likely provisional diagnosis?
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Tooth 21 of a 25-year-old woman is being restored with a zirconium dioxide-based crown fixed on an implant. After installation of the individual abutment, the distance between the abutment and its antagonist is being measured. What minimum distance must be observed in this case?
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Removable partial dentures for both jaws are being made for a 70-year-old man. Jo make diagnostic models, alginate impressions of both jaws need to be obtained. To prepare the alginate mass, the doctor mixes the powder with water in a rubber flask. Within what interval should the doctor apply the impression mass to the tray and place the tray in the patient’s oral cavity?
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A 55-year-old woman needs removable implant-retained dentures for both jaws. It is necessary to choose the type, the number and the placement of implants. What additional examination method will be the most efficient in making this decision?
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An 8-year-old boy during a preventive examination presents with chalk-like spots on the vestibular surface of teeth 11 and 21. The surface of the spots is dull and smooth on probing. No pain response to thermal stimuli. Choose the additional method of examination to confirm the diagnosis In this case:
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After the complex examination of a 44-year-old man, the dentist made a diagnosis of generalized periodontitis, II-degree, exacerbated progression. Lately the patient has been noticing a deterioration of his general condition, thirst, dryness in the oral cavity, itching skin. What additional examination needs to be performed first in this case?
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A 25-year-old woman complains of an intense pain in her upper jaw. The pain increases when she eats hot food or drinks hot beverages, while cold liquid relieves the pain. Objectively, in tooth 24 there is a carious cavity filled with softened dentin. Probing of the cavity floor is sharply painful, percussion is positive. Electric pulp test - 50 microamperes. What method of treatment would be the most advisable"?
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A 43-year-old patient complains of a sharp pulsing pain in the area of the right upper jaw. The pain appeared three days ago. Objectively, an inflamed round infiltration can be palpated on the vestibular surface of gingival mucosa of tooth 26, closer to the gingival margin. The tooth is intact, with II-degree mobility. Its horizontal and vertical percussion is painful. Periodontal pockets are 4-5 mm deep. What is the most likely diagnosis?
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A patient has a tumor on the upper lip. The tumor is 1.5x2.0 cm in size, cyanotic. The "compression-filling" sign is positive. What is the likely diagnosis?
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A 62-year-old man came to the dentist for extraction of tooth 44. During examination the patient suddenly fell unconscious. His respiration and pulse were Slow. The head was bowed, the elbows and wrists were flexed, the legs were stretched, the jaws were clenching convulsively. After that the patient developed clonic convulsions and started frothing at the mouth. The pupils were dilated and unresponsive to light. After 1.5 minutes after the onset of the seizure the patient’s muscles relaxed. His consciousness is clouded. Make the diagnosis:
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A 48-year-old woman complains of itching gums and increased teeth sensitivity to thermal and chemical stimuli. Objectively, the dental cervices are exposed. The gums are firm and pale. There is a small amount of supragingival dental plaque. In the area of teeth 13, 14, 24, and 25 there are cuneiform defects, probing of which is painful. The patient was provisionally diagnosed with periodontosis. What X-ray presentation is characteristic of this disease?
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