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KROK 2 Dentistry 2017 Questions | KROKEXAM
Browse 2017 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
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A 27-year-old man complains of teeth mobility in his upper and lower jaws. Objectively: dentition is intact. Central occlusion is determined. What examination methods should be applied?
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A 47-year-old man complains of mobility of the artificial crown on the 36 tooth, which was made 2 years ago. Objectively: the 36 tooth is covered with full metal swaged crown. Crown decementation and dentin demineralization are observed. What is the cause of such complication?
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A 48-year-old man complains of itching gums. Objectively: the gums are firm; cold water causes short-time pain in the teeth. X-ray imaging shows osteosclerosis of the alveolar septum: close-meshed bone structure, the alveolar septum height and intactness of the cortical plates is retained. What is the most likely diagnosis?
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A 60-year-old man complains of stabbing pain near the root of the tongue on the right, which develops during eating, especially sour food. Objectively: there is a swelling in the right submandibular area. On palpation the submandibular gland is dense and enlarged. Excretory duct orifice of the right submandibular gland is dilated and produces mucopurulent secretion. What is the most likely diagnosis?
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A 19-year-old woman, an actress, complains of discoloration of her left maxillary central incisor. One year ago the pulp of this tooth was removed and the tooth was filled. Gradually the tooth assumed grayish color. Objectively the 11 is filled, discolored, stable, painless on percussion. Deep occlusion is observed. What part of the clinical presentation contraindicates installation of an all-porcelain crown?
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A 18-year-old woman needs a denture. Objectively: the 21 tooth is dark gray in color, devitalized; orthognathic occlusion is observed. The tooth is to be covered with plastic crown. What plastic should be used to make the crown?
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A 58-year-old patient has made an appointment to make a denture. Objectively: the 22 tooth is firmand intact. The alveolar crest is atrophied; the palate is flat. Removable denture is to be made. What approach regarding the 22 tooth should be chosen by a dentist?
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A patient needs his 26 tooth extracted. After application of tuberal anaesthesia he developed general fatigue, nausea, and, later, severe itching and skin rashes. What complication occurred in the patient?
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For a 24-year-old woman a Richmond crown is being made to restore the crown of the central maxillar incisor. The cap is completed. What is the next step?
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A 25-year-old patient complains of profuse gingival hemorrhages, pain in the oral cavity, weakness, fatigue, fever up to 38°C. These presentations appeared a week ago. Objectively: the patient is pale, adynamic. Examination of the oral mucosa reveals multiple hemorrhages, friable gums, necrotic areas on the tops of gingival papillae, as well as enlarged, soft, painless lymph nodes. The oral mucosal lesion can be a symptom of the following disease:
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A 67-year-old patient complains of recurrent erosion on the red border of the lower lip. Objectively: the erosion is oval in shape, 0,8х1,3 cm in size, covered in thin scabs that reveal glossy surface with punctate bleeding, when removed. There are atrophic areas of the red border detected. Infiltration elements are absent. The submandibular lymph nodes are not enlarged. What is the provisional diagnosis?
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A 53-year-old patient complains of pain and clicking in the left temporomandibular joint. Objectively: the face is symmetrical, palpation of the lateral pterygoid muscles is painful on the left side. Mouth opening is reduced. Tomography shows the bone outline of joint surfaces to be smooth. Which disease of those listed below corresponds with this clinical presentation
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A 22-year-old patient complains of a painful swelling in the right parotid gland. A week earlier the patient received a cheek abrasion that healed under the purulent crust. Over the past two days the patient had been observing progressing pain and fever up to 38,6°C. Objectively: there is a soft tissue edema in the right parotid region, the skin is slightly strained, without discoloration. There is a dense painful infiltration 2,5x3,5 cm large, the skin over it exhibits limited mobility. The mouth can be fully opened, the mucous membrane around the orifice of the salivary duct is unchanged, saliva is transparent. What is the most likely diagnosis?
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A 33-year-old woman has been admitted to the dentofacial department with complaints of pain and edema in the right submandibular region, body temperature rise up to 39,5°C. Objectively: the patient has asymmetric face because of soft tissue edema of the right submandibular region, palpation reveals a dense infiltration, the skin over it is hyperemic, cannot make a fold. The 46 tooth has a deep carious cavity. What is the most likely diagnosis?
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Having recovered from acute respiratory disease, a patient has made an appointment with a dentist. The patient complains of pain in the gums, foul breath, inability to take food, general weakness. Objectively: the gums are hyperemic, swollen, covered with necrotic dirty-gray coating; the gums bleed when the coating is removed.Microbiological study of tissues revealed a great number of cocci, bacilli, fusobacteria, and spirochaete. Specify the drug for etiotropic treatment:
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A 35-year-old patient complains of itch, burning and edema of lips. These presentations occured a week ago.Objectively: there is reddening of the red border and skin, especially in the area of the mouth corners, there are also vesicles, scabs, small cracks against the background of erythematous affection of the red border. What is the most likely diagnosis?
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A 47-year-old patient presents with rounded bone protrusions 0,7-0,8 cm in size on the inner surface of the edentulous mandible in the premolar area. The denture for this patient should have:
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A 78-year-old patient is completely edentulous. He has been wearing dentures for 19 years. The patient complains of poor fixation of the upper denture. Objectively: the lower third of face is shortened, the alveolar processes of both jaws aremarkedly atrophied, the palate is flat. Mucous membrane in the denture-supporting area is atrophied. How often should the dentures be remodelled or restored?
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A 12-year-old boy complains of painful and bleeding gums on his upper jaw. Objectively the gingival margin in the area of the 13, 12, 11, 21, 22, 23 teeth is swollen, hyperemic, deformed due to overgrowths. Gingival papilla cover the crowns by 1/3 of their height, bleed on touch. Upper front teeth are overcrowded. X-ray shows no pathological changes of the periodontium. What drugs should be administered for topical treatment in the first place?
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A girl is 8 years old. She complains of impaired mastication. Objectively: on examination of the oral cavity the cutting edges of her lower incisors touch the palatine mucosa in the frontal area; the upper frontal teeth overlap with the lower ones by full height of their crowns. On the lower jaw the occlusal curve of the front teeth is markedly concave. Make the provisional diagnosis:
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A 43-year-old woman complains of mobility and displacement of her upper front teeth. Objectively: dental formula is . Teeth are slanted towards the vestibular side, diastema and tremata are observed, I-II-degree teeth mobility is detected. Select the orthodontic appliance for correction of teeth misalignment as a part of complex treatment of periodontal disease:
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A 44-year-old patient consulted a dental surgeon about constant acute pain in the upper jaw region on the left that aggravates during teeth joining. The pain appeared 3 days ago. Objectively: the face is symmetric, mouth opening is not limited. The crown of the 26 tooth is half-decayed. Probing of the carious cavity is painless. Percussion of the 26 tooth provokes acute pain. Mucous membrane of the alveolar process is edematic, hyperemic at the level of the 26 tooth. The 26 tooth had been treated before. What is your provisional diagnosis?
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When a prosthodontist was preparing the patient’s tooth, the patient had epileptic seizure that was subsequently terminated. Whatmistake had beenmade by the doctor?
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Parents of a 3-year-old child report that the child suffers from constant pain in the upper front teeth. Objectively: the coronal part of the 61 tooth is gray and decayed. Probing of the root canal orifice is painful and accompanied by bleeding. The tooth percussion provokes acute pain. Mucosa is hyperemic, edematic and painful. Palpation in the region of the 61 and 62 teeth reveals a fistula. What is your provisional diagnosis?
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A 30-year-old patient complains of a toothache caused by hot and cold stimuli. The pain irradiates to the ear and temple. Previously this tooth presented with spontaneous nocturnal toothache. Objectively: on the occlusal surface of the 37 tooth there is a deep carious cavity communicating at one point with the tooth cavity. Probing at the communication point, as well as cold stimulus, causes acute pain. The pain persists for a long time. Electric pulp test result is 55 microamperes. What is the most likely diagnosis?
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A 52-year-old woman complains of periodical appearance of a gingival fistula in the area of the 15 tooth. The tooth had been treated 1,5 years ago for caries. Objectively: the 15 tooth is filled. In the root apex projection there is a fistula; purulent exudate discharges on pressure. Tooth percussion is painless. On X-ray: the root canal is not filled, there is a destruction focus with blurred margins near the root.Make the diagnosis:
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A man was diagnosed with hard palate abscess. What approach should be chosen for abscess dissection?
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A 32-year-old patient presents with body temperature of 38,9°C, general fatigue, impaired speech, inability to eat. This condition has been recurring for the last 4 years in autumn and spring. There are vesicles and erosions covered in grayish fibrinous coating on the hyperemic and swollen labial and buccal mucosa. Nikolsky’s sign is negative. What is the most likely diagnosis?
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A 56-year-old man complains of enlarged lower lip, pain induced by hot, sour, salty, and bitter foods, and lips gluing together in the morning. The lower lip has been gradually enlarging and developing lumps his whole life. On examination: the lower lip is enlarged. The middle third of the Klein’s zone presents with several small red dots with openings that discharge clear drops. The red border is dry and peeling, there are fissures and erosions. What is the most likely diagnosis?
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A 57-year-old retired man complains of attacks of burning pain and rashes on the skin of his face and oral mucosa on the right. Anamnesis: a course of radiation therapy for treatment of the gastric disease, past case of chickenpox. Objectively: along the third branch of the trigeminal nerve the skin of the face presents with isolated erosions covered in fibrinous coating. There are multiple vesicles on the hyperemic and swollen oral mucosa. Rightsided lymphadenitis is observed. What diagnosis is the most likely?
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A 42-year-old woman complains of acute pain in her lower jaw, teeth mobility, high fever. The condition persists for 2 days. On clinical examination a doctor diagnosed her with acute mandibular osteomyelitis. What tactics regarding the mobile teeth should the doctor choose?
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A 7-year-old boy complains of increased body temperature, up to 38°C, headache, sore throat. Objectively: there are erosions on the slightly hyperemic mucosa of the soft palate, anterior palatal bars, and tonsils. The submandibular lymph nodes are slightly enlarged, painless. Name the causative agent of this disease:
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A 6-year-old boy complains of a cavity in the prevoiusly treated tooth. Objectively: in the 85 tooth there is a carious cavity within mantle dentin; the dentin is dense and pigmented; probing of the cavilty floor and walls, thermal stimuli, and percussion are painless. Sensitivity of the dentinenamel junction is observed during the cavity preparation. Make the diagnosis:
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A patient consulted a dentist about a cosmetic defect in the cervical region of the upper and lower canines. Various stimuli cause no pain. Objectively: there are V-shaped defects on the vestibular surface in the cervical area of the upper and lower canines. Their surface is smooth, glossy, hard. There is no reaction to probing and cold stimuli. What treatment should be administered?
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A boy is 10 years old. He complains of sloped chin and impaired mastication. Anamnesis states formula feeding. Objectively: corellation of the 6th teeth is of the Angle’s II class. Sagittal fissure is 7 mm. Eschler-Bittner test is positive. What is the most likely diagnosis?
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A 10-month-old child is fussy, refuses to eat. Disease onset was 2 days ago. The child is been treated by a pediatrician for pneumonia, receives antibiotics and sulfanilamides. Objectively: the oral mucosa is hyperemic, swollen; there is whitish coating on the mucosa of the cheeks, lips, soft and hard palate; coating removal can cause erosions. Submandibular lymph nodes are enlarged. What is the most likely diagnosis?
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A 20-year-old man complains of sharp pain in the mouth, increase of body temeperature up to 38,5°C, headache and aching joints, general weakness. The disease onset was 3 days ago due to overexposure to cold. Objectively: the red border is covered with hemorrhagic scabs, oral mucosa has large erosions and ulcers merging with each other and covered with grayish-white coating against the background of diffuse hyperemia. Conjunctivitis is observed. The skin of the forearms has erythematous spots 1,5 cm in diameter, with blisters in their center. What is the most likely diagnosis?
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Parents of a 12-year-old child are concerned about the child having white spots on the frontal teeth of the upper jaw; the spots appeared half a year ago. Objectively: there are chalky spots detected in the cervical zone vestibular surfaces of the 13, 12, 11, 21, 22, and 23 teeth. The enamel in those spots is dull; probing revealed it to be pliant and coarse. The anamnesis states short-time pain caused by chemical stimuli. What is the provisional diagnosis?
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A 22-year-old woman complains of pain caused by hot food and bursting sensation in the tooth. Half a year ago she presented with brief bouts of pain in the night, which over time increased in duration. Objectively: there is a large carious cavity in the 24 tooth, which opens to the dental cavity, deep probing is painful. Electric pulp test is 80 microamperes. What is the most likely diagnosis?
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A 14-year-old girl complains of bleeding gums and foul smell from her mouth. Objectively: gingival mucosa is hyperemic, pastose, hemorrhaging. Schiller-Pisarev test is positive. Papillary marginal alveolar index is 70%. Fedorov-Volodkina Hygiene Index equals 3. X-ray of the frontal area of jaws demonstrates retained cortical plate. Make the diagnosis:
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