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KROK 2 Dentistry 2023 Questions | KROKEXAM
Browse 2023 KROK 2 Dentistry exam questions with answers and explanations.
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A 42-year-old man complains of periodic pain in the area of his tooth 48. Objectively, tooth 48 has partially erupted with its mesial cusps, mucosa is pale pink and painless to palpation, the mouth opening is unrestricted. X-ray shows tooth 48 to be located medially to tooth 47 Select the surgical treatment method that would be optimal in this case.
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The parents of an 11-year-old boy came to a dentist with complaints that their child's gums are painful and bleeding during eating, the child has bad breath and a fever of 37.4°C. The boy has a recent history of an acute respiratory viral infection. Objectively, the gingival mucosa is brightly hyperemic and bleeds easily when touched. The apices of the interdental papillae are covered with a grayish necrotic plaque. The removal of the plaque exposes an ulcerated. surface. There is a large amount of dental plaque. What is the causative agent of this disease?
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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 vermilion border of the lower lip there is a red spot with velvety surface. The mucosal 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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A bugel (clasp) denture is to be made for the upper jaw of a 54-year-old man. The working impression has been obtained with. a silicone impression material, while the auxiliary impression has been made with an alginate material. How many casts are necessary to make one bugel denture?
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A porcelain-fused-to-metal crown for tooth 11 is being made for the patient. The tooth will be left vital. What measures should be taken during the treatment to prevent development of pulpitis in this tooth?
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A removable partial laminar denture for the upper jaw is being made for a patient. The central occlusion was determined and fixed. What clinical stage is next?
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Examination of a 12-year-old girl bu a dentist revealed a carious cavity on the mesial contact surface of tooth 46. The cavity is located within the mantle dentin, its walls and floor are pigmented and dense. Thermal stimuli provoke no response. Preparation of tooth 46 is painful in the area of the dentinoenamel junction. The decay-missing-filled index is DFM + df = 2. What filling material would be optimal in this case?
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Removable dentures were made for a 5-year-old child due to the early loss of deciduous second molars. When will the dentures need replacing in this case?
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A 48-year-old woman came to a dentist with complaints of a painful ulcer on her tongue. She had a similar ulcer one year ago Objectively, on the lateral surface of the tongue there is an oval erosion up to 5 mm in size, covered with a fibrinous plaque, surrounded by a hyperemic margin, soft and sharply painful to palpation. Oral mucosa in other areas is pale and edematous. What diagnosis can be made in this case?
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A dental orthodontist has diagnosed an 11-year-old child with microdontia of the upper incisors. What diagnostic method was used in this case?
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A 39-year-old woman complains of general malaise, headache, fever of 38°C, and pain in the oral cavity. Similar condition occurs periodically, more often in autumn and spring. Objectively, her sharply hyperemic and swollen mucosa of the cheeks, lips, and soft palate has erythematous spots, burst blisters, and erosions covered with fibrinous plaque. Nikolsky's sign is negative. Hypersalivation is observed. Submandibular lymph nodes are enlarged, mobile, and somewhat painful to palpation. What is the most likely diagnosis in this case?
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A 28-year-old man came to a dentist with complaints of pain in his lower left tooth. The pain is provoked by sweet foods and stops immediately after the stimulus is removed. Objectively, the distal surface of tooth 34 has a deep carious cavity filled with soft pigmented dentin. Probing the of the cavity floor is painful. No communication can be detected between the cavity and the pulp chamber. Thermal stimulation results are positive, short-term. What diagnosis can be made in this case?
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A 15-year-old girl complains of throbbing pain and a swelling above her upper lip, fever of 38.0°C, and deterioration of her general condition. Two days ago, she tried to pop a pimple in this area on her own. Objectively, she has a dense painful infiltration on the skin of her upper lip. The infiltration is rounded, cone-shaped. up to 2.5 cm in diameter. The skin over the infiltration is sharply hyperemic, with a necrotic rod in the center. Make the diagnosis.
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A 47-year-old man complains of an ulcer on the back of his tongue. Hist history states that before the ulcer, there. was a tuberculous infiltrate for a long time. The infiltrate was gradually enlarging and then an ulcer formed. Objectively. there is a shallow elongated ulcer on the dorsum of the patient's tongue. The ulcer is painful, has overhanging edges and is surrounded with tubercles. Make the provisional diagnosis.
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A 14-year-old patient was referred. to a dental orthodontist for consultation. Objectively, the upper canines have erupted on the vestibular side, the upper and lower dentition is narrowed. What auxiliary method will allow diagnosing the narrowing of the upper dentition?
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A 30-year-old woman came to a dentist with complaints of an unpleasant bursting sensation in her upper right tooth. Heat makes this sensation worse. Objectively, the masticatory surface of tooth 17 has a deep carious cavity that communicates with the pulp chamber. Docp probing is painful. Percussion of tooth 17 is mildly painful. X-ray shows slight widening of the periodontal fissure at the root apices Electric pulp testing-70 microamperes. What diagnosis can be made in this case?
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A 6-year-old child is being treated for acute diffuse pulpitis of tooth 85 using the technique of pulp extirpation. What type of material would be optimal in this case for permanent obturation of root canals?
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A 15-year-old girl has been provisionally diagnosed with chronic parenchymal parotitis of the right parotid salivary gland. What changes will be observed in the sialogram in this case?
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A 14-year-old boy complains of a fever of 38-39 C that has been observed for the last 5 days, runny nose, and sore throat. Examination detects signs of catarrhal stomatitis, tonsillitis, and pharyngitis and enlarged lymph nodes along the sternocleidomastoid muscle that resemble a chain and are mobile and mildly painful. The palatine tonsils are sharply hyperemic and covered in a plaque that can be easily removed. Make the provisional diagnosis.
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A 32-year-old man came to a dentist with complaints of pain in the lower jaw on the right and problems with mouth opening. Objectively, the face is symmetrical, mouth opening is somewhat difficult (first degree), the mucosa behind tooth 47 is swollen, hyperemic, and painful to palpation. The mesial cusps of tooth 48 that has not fully erupted are visible. What diagnosis can be made in this case?
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Three days ago a complete removable laminar denture was fixed to the upper jaw of a 57-year-old patient. The patient. complains of a sharp pain in the mucogingival junction on the left. The pain intensifies during masticatory movements. Objectively, in the area of missing teeth 25, 26, and 27 the mucosa of the mucogingival junction is hyperemic and painful when touched. What will be the doctor's tactics in this case?
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A dentist performs endodontic treatment of tooth 46 for chronic fibrous pulpitis. The dentist chose the step-back technique to scout and widen the root canals. At the first stage, the root canal was scouted and its working length was determined. What is the next step according to this technique?
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A 45-year-old woman complains of bleeding gums. The bleeding occurs when she brushes her teeth or eats hard food. Objectively, in the frontal area of her lower jaw the gums are hyperemic, edematous, and bleed when palpated. In the other areas, her oral mucosa is normal. The woman has a deep bite. Her teeth are stable, except for teeth 41 and 31 that have the I degree of mobility X-ray shows resorption of the interalveolar septa in the area of teeth 42, 41, 32, and 31 to 1/3 of the root length. What diagnosis can be made in this case?
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A 51-year-old man complains of mobility of his porcelain-fused-to-metal dental bridge with 43 and 47 as abutment teeth. He has been using this denture for 9 months. X-ray shows atrophy of the alveolar process in the area of tooth 43 to 1/2 of its root length and in the area of tooth 47 to 2/3 of its root length. Examination. of the oral cavity detects mobility of the abutment teeth and periodontal pockets in this area, as well as symptomatic gingivitis. What is the cause of the pathological mobility of the abutment teeth?
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A 30-year-old woman came to a dentist with complaints of discoloration of her t upper front tooth and food getting stuck between the teeth. Objectively, a carious cavity is observed on the mesial contact surface of tooth 12 within the mantle dentin. The walls and floor of the carious cavity are dense and pigmented. The dentinoenamel border is tender to probing. Thermal stimulus provokes no response. Percussion results are negative. Make the diagnosis.
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A 75-year-old man complains of poor fixation of his full removable denture for the lower jaw and food particles accumulating under the denture base. The lower third of his face is shortened. The alveolar processes are markedly atrophied. What anatomical structure of the lower jaw can be used for improvement of full removable denture fixation?
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At a clinic of orthopedic dentistry, at the stage of try-in of the metal frame of a porcelain-fused-to-metal dental bridge. a dentist uses a micrometer to determine the thickness of the metal cap made of cobalt-chromium alloy What should be the minimum thickness of the cobalt-chromium metal cap to make an abutment porcelain-fused-to-metal crown?
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A 5-year-old child has all the temporary teeth in the oral cavity with tremata between them. The incisors are in direct contact and their cutting edges are worn off the distal surfaces of two temporary molars form a mesiosagittal step-the Tsilinsky sign. What period of bite formation is it?
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A 52-year-old woman complains of cosmetic defects in her teeth that she noticed several years ago. Objectively, on the vestibular surfaces in the paracervical areas of her premolars and incisors, there are fissure-like defects within the mantle dentine, formed by smooth glossy surfaces. The necks of the teeth are exposed. The gums are firm and pale pink. The defects are painless when probed. Make the diagnosis.
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A 25-year-old woman came to a dental surgeon for a planned tooth extraction. Objectively, the crown of her tooth 37 is destroyed by 2/3. The gingival mucosa in the area of tooth 37 is without changes. What type of anesthesia should the doctor use to remove tooth 37?
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A dentist prepares to receive a patient. The dental unit has no modern equipment for handpiece disinfection. The design of the handpiece does not allow for its autoclaving. Specify the algorithm for the handpiece disinfection in this case.
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A 67-year-old man came to the orthopedic dentistry clinic to have dentures made for him. Examination detects a marked atrophy of his maxillary alveolar process. What type of atrophic edentulous. maxilla is observed in this patient?
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Extraction of tooth 46 under local anesthesia is indicated for a 42-year-old patient. Where should the dentist be in relation to the patient during the extraction of this tooth?
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A 50-year-old man came to a dentist with complaints of the mobility of his lower teeth. Objectively, the dentition is intact. the necks of the teeth are exposed, the crowns are tall, the teeth have mobility of the first degree. What splint would be optimal in this clinical case?
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A porcelain-fused-to-metal dental bridge is being made for a 51-year-old woman. Vital teeth 33, 36, and 37 will function as the abutment teeth. The teeth preparation is planned to be done under anesthesia. What type of anesthesia would be most effective in this case?
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A 56-year-old woman undergoes a preventive examination by a dentist. She has an oval erosion on the vermilion border of her lower lip. The erosion is deep red, its surface is smooth. Bloody scabs that are difficult to remove are observed on the erosion surface. Removal of the scabs causes mild bleeding. Slight injury of the erosion in the places where there are no scabs causes no bleeding. What type of lower lip precancer is it?
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A 28-year-old man came to the maxillofacial surgery department He complains of a cutaneous neoplasm in his right submandibular region. The neoplasm appeared 2 years ago. In the process of shaving, the neoplasm is frequenily injured. The following provisional diagnosis has been made: papilloma. In the neoplastic area, examination shows an ulcer against the background of hyperemic skin. What tactics should the dental surgeon choose?
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A 45-year-old man came to a dentist for tooth extraction. The dentist chose S-shaped left-sided forceps for this purpose. What teeth are most often extracted with this type of forceps?
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A person has been hospitalized into the department of maxillofacial surgery with the following diagnosis: a displaced traumatic open right-sided mental fracture of the mandible. What is the typical direction of displacement of the larger fragment?
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A 73-year-old woman came to a dentist with complaints of angular cheilitis. She has been using complete removable laminar dentures for the upper and lower jaw for 5 years. Objectively, the lower third of her face is shortened, the mouth angles are downturned, and the skin there is macerated. What is the most likely cause of this complication?
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