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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 40-year-old man had his root canal of the 34 tooth filled due to chronic fibrous periodontitis. Soon the treated place became painful. On X-ray the root canal of the 34 tooth is filled to the root apex. What tactics should the dentist choose to manage the pain?
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A 49-year-old man was diagnosed with recurrence of lower lip cancer two years after he had undergone radiation therapy. Objectively in the area of his lower right lip there is a neoplasm 1x2 cm in size with an ulcer in its center. In the right submandibular area there are 2 round, enlarged, dense, painless lymph nodes. What approach to the treatment would be optimal in this case?
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During regular check-up a 6.5-year-old child presents with carious cavity on the distal proximal surface of 65 within mantle dentin. Cavity walls and bottom are pigmented, dense, painless on probing; there is no response to cold stimulus; percussion is painless. During tooth preparation there is tenderness at the level of dentinoenamel junction. What is the most likely diagnosis?
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After adenotonsillectomy it is necessary to break the mouth breathing habit in a 4year-old child. The orthodontist recommends application of an oral vestibular shield (Kerbitz’ vestibular plate). Vestibular shield facilitates training of the following muscle:
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A 30-year-old man presents with fresh median mandibular fracture without visible displacement of the fragments. What will be the function of the dental apparatus to be prescribed in this case?
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A 43-year-old woman complains of her lower teeth mobility. Objectively the teeth mobility is of the I-II-degree. It is planned to make a full-cast removable occlusal splint for her. What material would be optimal for this splint?
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A 4-year-old practically healthy child came for oral cavity sanation. Objectively on the masticatory surface of 75 there is a carious cavity within mantle dentin. The cavity is ?lled with softened dentin. Dentinoenamel junction is painful on probing. What material would be optimal for permanent ?lling?
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A 7.5-year-old practically healthy child complains of crown fracture and pain in the upper right incisor. Objectively 2/3 of crown of 11 is absent, the pulp is exposed and red; on probing it is acutely painful and bleeding; tooth percussion is painful. The trauma occurred 2 hours ago. What would be the optimal treatment method in this case?
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Parents of a 2.5-year-old child complain of gradual destruction of the upper front teeth of their child for the last several months. Objectively there are carious cavities within mantle dentin on the contact and vestibular surfaces of 52, 51, 61, and 62. The cavities are ?lled with softened pigmented dentin that can be easily removed with dental excavator. Make the provisional diagnosis:
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A 49-year-old man complains of progressing reduction of mouth opening, pain on the left when swallowing, severe deterioration of his general well-being, temperature increase up to 39.3°C. Destroyed tooth 38 presents with acute pain. Objectively the face is symmetrical, the submandibular lymph nodes on the left are enlarged and painful on palpation. Palpation under the left mandibular angle and in the left retromandibular area provokes sharp pain. Mouth opening and movement of the mandible to the left are signi?cantly reduced. The left pterygomandibular fold is hyperemic and in?ltrated. What is the most likely diagnosis?
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A 40-year-old man presents with pathologic teeth grinding caused by their functional overload due to the loss of many antagonist teeth. With direct occlusion, vertical grinding of the front teeth resulted in protrusion of the patient’s lower jaw forwards. Interalveolar space is diminished, the lower third of the face is shortened. What would be the most advisable treatment in this case?
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A 7-year-old child complains of pain and swelling in the left submandibular region. The swelling in this region developed 2 days ago. Objectively: the child is in a satisfactory condition, body temperature is of 37.3°C. Face is asymmetrical due to the soft tissue swelling in the left submandibular region. Palpation reveals a round formation 2x2 cm in size. The formation is mobile, painful, nonfused with the skin. The 74 tooth is discolored, percussion is painful. What is the provisional diagnosis?
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A 48-year-old patient complains of the lower jaw teeth mobility. Van Thiel dental splint is to be made for prosthodontic treatment. What construction elements are supposed to fix it in place?
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A 55-year-old man suffered a blow to the frontal mandibular area. He is diagnosed with mandibular fracture. Prior to trauma he was wearing removable dentures (partial laminar denture for the lower law and full denture for the upper jaw). What can be used for transport immobilization of the fracture?
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A 57-year-old woman came to a dentist for extraction of the 34 tooth due to exacerbation of chronic periodontitis. What instrument would be optimal for tooth extraction in the given case?
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A cast clasp-retained (bugel) removable partial denture is being made for a 58-yearold patient. Impressions are made, centric jaw relation is determined, plaster casts are obtained. What is the next stage?
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A 7-year-old boy underwent ?ssure sealing in teeth 36 and 46. Fissure sealing would be most effective:
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A 6-year-old girl took paracetamol to treat a case of URTI two days ago, which resulted in the development of her present condition. The disease onset was acute with temperature increase up to 39.8°C. Objectively there are cockade-shaped maculopapular rashes on her face. The vermilion border is swollen, hyperemic, covered in massive brown crusts, and presents with bleeding cracks. Conjunctivitis is detected. Swollen and hyperemic oral mucosa presents with numerous erosions covered with Hbrinous incrustations; the erosions are sharply painful on palpation. What is the most likely diagnosis?
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How often should the dentures be replaced in children during the period of milk occlusion according to Ilyina-Markosian?
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On objective examination a 59-year-old man with the edentulous mandible presents with bone protrusions and mobile areas of the alveolar crest. To ensure proper ?xation of the denture and even load distribution the following functional impression should be made:
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A 28-year-old man complains of pain in the infraorbital and parotid region on the left. On examination: hemorrhage occurs in the lower eyelid and conjunctiva of the left eye, there are signs of crepitation and step deformity of the eyesocket lower edge. The mouth opens by 1 cm. Make the diagnosis:
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A child is 8 years old. There are complaints of congested upper incisors. Objectively: the first molars closure is of Angle’s I class, frontal overbite is orthognathic. The 12 and 22 teeth erupt palatinally with space de?ciency of 2/3 of the tooth crown. The 11 and 21 teeth are 10 mm each in cross-section. The child has inherited father’s facial type with prognathism and macrodontia of the central incisors. Choose the preventive treatment, considering this hereditary pathology:
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A 38-year-old woman complains of burning pain in her lips and angles of her mouth, their dryness. Anamnesis states that she has been suffering from diabetes mellitus for the last 8 years. Objectively: the vermillion border is dry, congestively hyperemic, covered in scales of varying size. In the angles of the mouth there are ?ssures covered in white coating, the skin is macerated. What ointment should be prescribed for topical treatment in the given case?
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A 35-year-old woman complains of lips enlargement. The first incident occurred one year ago, when she developed lip edema that abated quickly, but the lips remained slightly enlarged. Three days ago after overexposure to cold her lips enlarged again. Objectively: ptosis, upper and lower lips are markedly enlarged, more on the left, soft, elastic, and painless on palpation; no impressions on the lip surface are left after pressing it with a ?nger. The tongue is swollen, with tuberous surface and folds on its back. What is the most likely diagnosis?
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A 45-year-old man complains of dryness and pain in the lower lip. On examination: the lower lip is swollen, dry, covered in small scales and ?ssures. In the Klein area (wet-dry line) there are dilated openings of salivatory glands observed as red dots producing clear substance. The lower lip mucosa is lumpy. What is the most likely diagnosis?
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A 23-year-old man complains of gum bleeding when he brushes his teeth or eats solid food. Objectively: the gums of the front lower jaw are hyperemic, swollen and bleeding when palpated. Oral and gingival mucosa in other areas are not affected. The occlusion is deep. The teeth are ?rm, except for the 41 and 31 (degree 1 mobility). X-ray shows resorption of the alveolar septum in the area of the 41, 42, 32, and 31 teeth up to 1/3 of the root length. What is the most likely diagnosis?
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A 40-year-old man, a chemical industry worker, notes the sour sensation in his mouth, pain response to thermal and chemical stimuli. On examination: on the vestibular surface and cutting edge of the front teeth there are chalky enamel defects with uneven scalloped margins. Make the diagnosis:
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A 42-year-old woman complains of acute lip enlargement, itching, and bursting sensation. She ascribes her condition to introduction of a new lipstick. On examination the lips are signi?cantly enlarged and turgid, on palpation they are ?rm, elastic, and painless. Regional lymph nodes are without changes. What is the most likely diagnosis?
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A 50-year-old patient, an employee of the print shop, complains of foul smell from his mouth and excessive salivation. Objectively against the background of hyperemic and slightly swollen gums there is a blue-black border along the gum margin of the lower jaw and upper front teeth. There is a large amount of dental deposit observed. Name the type of stomatitis in this patient:
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A 25-year-old man complains of incorrectly positioned maxillary left central incisor due to trauma sustained 2 months ago. Objectively tooth 21 is rotated around its axis into palatal position. What would be the most advisable treatment method for correction of this defect?
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A 44-year-old woman complains of the face swelling in the right lower jaw area and teeth mobility. Objectively: soft tissues are without changes, the regional lymph nodes cannot be palpated. The alveolar process and the body of the lower jaw near the 46, 47, and 48 teeth are thickened, painless when palpated, and lumpy. The teeth in the thickened area are mobile. Puncture consists of brown fluid without cholesterol crystals. What is the provisional diagnosis?
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A 6.5-year-old child has closed nonpigmented ?ssures in the first permanent molar, which have been revealed during preventive examination. Enamel transparency is retained, its probing reveals no coarseness. Choose the optimal method of treatment in this case:
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A man complains of gingival pain in his upper left jaw and bleeding that occurs when he brushes his teeth or eats solid food. Objectively on the upper jaw he wears a swaged-soldered metal bridge with 14 and 16 as abutment teeth. The crown edge is pushed under the gingival margin by 0.3 mm. Intermediate part is closely ?tted to the gums. The mucosa is hyperemic, swollen, interdental papillae are smoothed out; touching mucosa with a dental instrument provokes bleeding. What medical tactics should the dentist choose in the first place?
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When checking construction of the soldered dental bridge with the 35 and 38 abutment teeth the following was detected: pores in the place where abutment crowns and intermediate part are soldered together; masticatory cusps are sharply de?ned; there is early contact with antagonist teeth; the intermediate part makes tight contact with the alveolar process mucosa. How can those ?aws be corrected?
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A 50-year-old man was diagnosed with sialolithiasis with the salivary gland stone located deep within the salivary gland. Choose the optimal treatment tactics:
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Due to lack of timely specialized treatment a 44-year-old man presents with incorrectly healed displaced mandibular fracture. Objectively the lower jaw narrows sharply, vestibular cusps of the lower teeth contact with oral cusps of the upper teeth. The patient declined surgical treatment. What treatment tactics should be chosen by the dentist in this case?
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A 57-year-old man presents with habitual mandibular dislocation. To reduce mouth opening, Yadrova apparatus was made. How long should the treatment last in this case?
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An HIV-infected patients needs a dental prosthesis. The dentist plans to make dental bridges for this patient. How should the instruments be processed after the appointment?
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A 30-year-old man complains of pain in his front lower teeth, which he attributes to a trauma to the mental region. Objectively: continuous dentition, orthognathic occlusion. X-ray shows a median mandibular fracture. What dental splint would be optimal?
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To make the external prosthesis for a 62year-old man it is necessary to obtain a Hippocrates facial moulage of this patient. What impression material should be used?
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