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KROK 2 Dentistry 2021 Questions | KROKEXAM
Browse 2021 KROK 2 Dentistry exam questions with answers and explanations.
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A 32-year-old man was diagnosed with chronic fibrous pulpitis of tooth 27. Vital extirpation is chosen as the treatment method. An amide anesthetic is to be used for tuberal and palatal anesthesia. What anesthetic solution needs to be administered in this case?
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A 56-year-old man has an oval erosion with a deep red smooth surface on the vermillion border of the lower lip between the angle of the mouth and the midline. The surface of the erosion has bloody scabs that are difficult to remove. Their removal causes a slight bleeding. Slight trauma of the erosion in a place without scabs causes no bleeding. What type of lower lip precancer is it?
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A regular check-up of a 7-year-old girl detected smooth chalk-like spots on the vestibular surface of her upper central incisors, closer to their cutting edge. The surface of the spots does not stain with methylene blue. At the age of 4, the child had a trauma of teeth 51 and 61. What is the most likely diagnosis in this case?
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A 26-year-old man came to a dental clinic. He was diagnosed with a non-displaced fracture of the maxillary alveolar process in the area of teeth 14 and 15. The dentition remains uninterrupted. All the teeth are stable. What splint must be applied in this case?
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A 38-year-old man complains of a neoplasm 1 cm in size on the gums in the area of tooth 14. The neoplasm is bright red, soft, round, and bleeds when touched. This clinical presentation corresponds with the following disease:
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A 50-year-old woman with compensated insulin-dependent diabetes mellitus needs dental prosthetics. She has been in a clinic for several hours already, during which she was nervous and skipped her meals. In the process of obtaining her dental impressions, she suddenly became aggressive, paled, broke out in cold sweat, and fell unconscious. What substance is used for emergency aid in such clinical situations?
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A 21-year-old man complains of difficult mouth opening and visible facial deformation throughout the last 2 years. He has a history of facial trauma several years ago. Examination shows the right side of the face to be flattened, the chin is displaced to the left. Palpation detects diminished excursion of the articular head in the left lower jaw. The mouth opening is reduced to 1 cm. Make the provisional diagnosis:
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When pressing plastic dough, a dental technician several times opened and closed the cuvette to check the quantity of the plastic mass in it. These actions may result in the development of:
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A 12-year-old child complains of high body temperature of 39.7°C, enlarged lymph nodes, sore throat, runny nose, and cough. Objectively, acute catarrhal stomatitis is observed in the oral cavity, some of the palatine tonsils have a yellow gray coating that crumbles and can be easily removed. The cervical, occipital, and submandibular lymph nodes are enlarged, mobile, and slightly painful. Laboratory blood testing shows leuko-, lympho-, and monocytosis and atypical mononuclear cells. What is the causative agent of this disease?
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A 6-year-old child complains of food retention in a tooth on the lower jaw. Objectively, in tooth 75 on its masticatory surface within mantle dentin there is a carious cavity with a wide opening. The dentin of the cavity walls and floor is dense and pigmented. Probing of the carious cavity and percussion of the tooth are painless. Thermal stimuli provoke no response. Mucosa in the area of tooth 75 is without pathologic changes. The child belongs to health group
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A 5-year-old child has all temporary teeth in the oral cavity with tremas between them. The incisors are in direct contact and their cutting edges are worn off. The distal surfaces of two temporary molars form a mesio-sagittal step the Zielinsky sign. What period of bitc formation is it?
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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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A man with an occupational face trauma on the right has been brought into the first-aid center. The trauma was received approximately 3 hours ago, the man is conscious. Objectively, on his right cheek there is an irregularly-shaped wound 5x3 cm in size with uneven edges. Parting of the wound edges exposes immobile teeth. In the oral cavity, there is a breach in the buccal mucosa. The bite is not affected. What type of surgical debridement is necessary for this patient?
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A 56-year-old man complains of a painful swelling in his right parotid area. The swelling was noticed 5-6 months ago. Objectively, he has a right-sided paresis of the facial muscles. Palpation reveals a moderately painful tuberous tumor fused with the surrounding tissues. In the center of the tumor, there is an area of softening. The submandibular and cervical lymph nodes on the right are enlarged and dense. The mouth can be opened without restriction. No saliva flows out from the duct of the right parotid gland. What provisional diagnosis can be made?
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A 35-year-old woman came to a dental surgeon complaining of a slight deformity of the mandibular body on the right. Orthopantomogram shows a round homogeneous shadow with clear margins in the mandibular body. The density of the shadow is close to that of dental tissues. On its periphery, the neoplasm is surrounded by a transparent zone 1 mm wide. What is the most likely diagnosis in this case?
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A 25-year-old man complains of brief pain attacks in response to sweet foods in one of his lower teeth and food retention in a carious cavity. Objectively, on the masticatory surface of tooth 36 there is a carious cavity within the parapulpar dentin. The dentin is soft. The carious cavity does not communicate with the dental cavity, probing of its floor is painful. Percussion of tooth 36 and palpation of gingival mucosa in the projection of root apex are painless. Thermal stimuli cause pain that quickly stops after the simulus is removed. What is the most likely diagnosis?
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The jaws of a newborn are in direct relation to each other. The baby is full term, healthy, and breastfed. What bite can be prognosed in this case?
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A 7-year-old child needs mandibular vestibuloplasty. What pathology is most often caused by a shallow vestibule of the mouth?
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A man presents with clinical signs that resemble acute herpetic stomatitis. This diagnosis will be confirmed, if cytology detects the presence of the following cells:
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A 52-year-old man complains of pain and clicking in the area of his left temporomandibular joint. Objectively, the face is symmetrical, palpation of the medial and lateral pterygoid muscles is painful on the left. The mouth opening is limited to 1.5 cm between the cutting edges of the central incisors. X-ray shows smooth contours of the articular surfaces, the joint space is normal. What is the most likely diagnosis in this case?
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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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Preventive examination of a 7-year old child revealed a carious cavity with overhanging enamel within the limited area of a fissure in tooth 36. The probe catches in the softened dentin. In the other areas, the enamel on the edges of the fissures is glossy and dense. A dentist plans to fill the carious lesion of tooth 36. What tactics should be chosen regarding the intact areas of the fissure?
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After a trauma, a man has developed complaints of displaced tooth 32 and pain that intensifies when he bites food. Examination shows edema of the lower lip and mucosal hematoma in the area of tooth 32. Tooth 32 has the I degree of mobility and a slight sagittal displacement. X-ray shows a widening of the periodontal fissure. Make the diagnosis:
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A 6-year-old child was referred for extraction of the temporary lower central incisors due to changes in the dentition. The teeth have the III degree of mobility. What type of anesthesia would be optimal in this case?
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A 58-year-old woman complains of a red spot on her lower lip that first appeared 4 years ago. Objectively, on the vermillion border of the lower lip there is a red spot with velvety surface. The lesion is slightly concave, when compared to the surrounding tissues. It does not change its color when pressed. Make the provisional diagnosis:
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Preparation of the vital tooth 34 for the installation of an all-ceramic crown is planned for a 38-year-old man. The man suffers from ischemic heart disease. What anesthesia is advisable in this case?
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A 4-year-old child was diagnosed with exacerbation of chronic periodontitis of tooth 85. X-ray shows destruction of the lamina dura of the dental follicle of tooth 45, a shadow in the bifurcation area of tooth 85, and pathologic resorption of 2/3 of the medial root. What treatment tactics would you choose?
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A 27-year-old woman came to the dentist for the purpose of oral cavity sanation. After anesthesia, she started complaining of dizziness, ringing in her ears, dimming vision, and general weakness. Objectively, her skin is pale and covered in cold sweat. Her pulse is 94/min., of low volume and pressure. Her blood pressure is 96/60 mm Hg. She had a brief episode of unconsciousness that lasted 30 seconds. What urgent condition developed in this woman?
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A 14-year-old girl complains of a pulsing pain in her upper left teeth that lasts for 3 days already and sharply increases on biting. Objectively, her tooth 26 has a deep carious cavity that does not communicate with the dental cavity. Probing of the cavity floor is painless. Vertical and horizontal percussion is sharply painful. The mucosa in the area of tooth 26 is hyperemic. What is the provisional diagnosis in this case?
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A 48-year-old man, who for several years already has been suffering from enterocolitis, complains of painful lesions that from time to time appear in different places of his oral mucosa. Objective examination of the mucosa reveals isolated areas of epithelial damage. They are under 5 mm in diameter, have a regular oval shape, hyperemic border, and yellow white coating. Their palpation is painful. What is the most likely diagnosis?
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