HomeKROK Question Archive
KROK Question Archive
KROK 2 Dentistry 2008 Questions | KROKEXAM
Browse 2008 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
200 Questions121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160
A 48-year-old patient complained about posttraumatic pain in the area of his chin. Examination revealed median fracture of lower jaw with I class dentition defect (according to Kennedy classification). It is indicated to make a Vankevich splint in Stepanov’s modification. What will determine the height of directing planes of this splint?
View question and answer
A 24-year-old soldier injured by a shell splinter was diagnosed with fracture of mandible accompanied by an over 2 cm long bone defect in the chin area. What method of fixation of mandible fragments is indicated?
View question and answer
A 35-year-old patient consulted a dentist about a painless, slowly growing neoplasm in the area of the 11 and 12 teeth. Examination revealed that the neoplasm had flattened form, was adjacent to the teeth, had a pedicle, was of light-pink colour, up to 1,5 cm large, with smooth surface and dense consistensy. Diagnosis: epulis in the area of the 11, 12 teeth. What form of epulis are these clinical presentations typical for?
View question and answer
As a result of a road accident a 45-year-old patient got an injury of his upper jaw. Examination revealed elongated and flattened face, profuse nasal hemorrhage, liquorrhea from the nose and ears. These clinical presentations are typical for the following fracture of upper jaw:
View question and answer
A child is 2,5-year-old. The parents complain about thumb sucking during sleep. What tactics should the doctor choose?
View question and answer
A patient is waiting for a partial removable laminar denture. Anatomic models of both jaws were made by means of elastic alginate material "Ipin"and referred for disinfection. What disinfection method should be applied?
View question and answer
A 13-year-old boy complains about pain in the 46 tooth induced by cold stimuli. Objectively: there is a deep carious cavity on the masticatory surface of the 46 tooth within light softened circumpulpar dentin. Probing of carious cavity floor is overall painful, cold stimulus causes acute pain that is quickly relieved after the stimulus’ elimination. Choose an optimal dental treatment paste:
View question and answer
An 8-year-old child has a deep carious cavity communicating with tooth cavity on the distaloapproximal surface of the 75 tooth. Probing is painful, percussion is painless, cold water causes slowly abating pain. The tooth decayed a few months ago, wasn’t treated. What treatment method is to be applied in this case?
View question and answer
An 8-year-old child complains about pain in the 21 tooth that is getting worse during cutting. A month ago a part of tooth crown broke off as a result of a fall. The child didn’t consult a dentist. Objectively: in the area of medial angle of the 21 tooth there is a crown defect that makes up 1/3 of the crown’s height. Tooth cavity is open, probing and thermal stimulus cause no pain. Percussion is acutely painful. Gum around the 21 tooth is edematic and hyperemic. What is the provisional diagnosis?
View question and answer
An orthodontist was treating a patient infected with AIDS virus. Accidentally he injured skin of one of his fingers with a dental disk during tooth preparation. What actions should the orthodontist take in this case?
View question and answer
A 36-year-old patient complains about acute pain, "clicking"in the right mandibulotemporal joint, burning in the area of her right external acoustic meatus. Movements of her lower jaw are steplike, along with brief blocking moments in the joint and acute pain. Objectively: the face is symmetric. Occlusion is orthognathic, intraoral palpation of lateral pterygoid muscle causes pain on the right. Tomograms show that contours of bone structures of articular surfaces are regular and smooth. What is the most probable diagnosis?
View question and answer
A 40-year-old patient complains about difficult mastication as a result of lower jaw deviation. Anamnesis data: mental fracture 2 months ago. Objectively: the 35; 36; 38 ... 45; 46 teeth are missing. Remaining teeth are intact. The 43; 44; 47; 48 teeth have no contact with antagonists and their oral deviation makes up 1 cm. What is the optimal construction of lower jaw denture?
View question and answer
A patient is 24 years old. Artificial crown of his 22 tooth broke off. The tooth was devitalized 8 years ago and its crown is totally decayed. What microprosthesis should be made for restoration of tooth crown?
View question and answer
One of the methods to define central occlusion is to construct a flat that will go through cutting edges of central incisors and distalobuccal tubercles of last molar teeth providing that there is sufficient quantity of teeth. What flat should be constructed?
View question and answer
During restoration of a II class (according to Black’s classification) carious cavity of the 25 tooth a doctor applied methods of total mordanting and drying of hard tissues. After that he noticed that enamel surface became chalky and dentin became completely dry. How should he treat enamel and dentin surfaces for the further restoration by method of "wet − Bonding"?
View question and answer
A 42-year-old patient complains about tooth mobility, change of tooth position, foul taste, pain during food mastication. Objectively: teeth of both upper and lower jaws are mobile (2-3 degree), there are also diastems and diaereses. Tooth roots are dehisced by 1/2. There are serous purulent discharges from periodontal pockets. Orthopantomogram shows bony tissue destruction down to 2/3 of root length. There are bone pockets. What is the most probable diagnosis?
View question and answer
A 60-year-old man has got a pustule on his chin skin that quickly developed into a hard, strongly painful infiltrate 3х3 cm large. In the epicentre three necrosis zones around hair follicles are present. Lymph nodes of chin are enlarged, painful. Body temperature is 38,5°C. What is the most probable diagnosis?
View question and answer
A 50-year-old patient comlains of difficult mastication, tooth mobility, halitosis, gingival hemorrhage. Objectively: gums are hyperemic, cyanotic, there is also dental scale. Parodontal pockets of upper molar teeth were 8 mm, of the rest teeth - 6 mm. X-ray picture showed resorption of bone tissue by 2/3-1/2 of root length. What is the most probable diagnosis?
View question and answer
An 18-year-old patient complains about gingival enlargement, hemorrhage and pain during eating. Objectively: gingival edema, hyperemia, enlargement is up to 1/3 of tooth crown length. Palpation causes intense haemorhage and pain. What is the most probable diagnosis?
View question and answer
A boy is 1 month old. He has a wound with purulent discharge near the medial edge of inferior eyelid, on the right. The illness began abruptly, body temperature is up to 40°C. General condition is grave. On the second day of illness there appeared an infiltration near the internal edge of orbit and cheek on the right. Skin above it is hyperemic, fluctuation cannot be detected. Palpebral fissure is narrowed. Right nasal meatus discharges pus. There is an infiltration on the vestibular surface of alveolar process and palate on the right. Mucous membrane above it along the mucogingival fold is hyperemic, there is fluctuation. What is the most probable diagnosis?
View question and answer
A 25-year-old patient complains of a light brown spot on the frontal tooth of her upper jaw. Objectively: a single light brown spot in the precervical area of the 23 tooth, probing revealed that its surface was smooth. Reaction to the cold stimulus and probing was painless. What is the most probable diagnosis?
View question and answer
A 35-year-old man complains about pain in the area of the 38 tooth, painful deglutition, difficult mouth opening. What anesthesia method will be optimal during operation on account of pericoronaritis?
View question and answer
A young woman complained about having vesicles in oral cavity, painful ulcers, especially during talking and eating; muscle and joint pain, body temperature rise, indisposition, weakness. She fell suddenly ill 2 days ago. Objectively: t o- 38,4°C. Vermilion border is covered with bloody crusts that stick together and impede mouth opening. Mucous membrane of lips, cheeks, mouth floor, tongue, soft palate is hyperemic and edematic; there are single vesicles and large painful erosions covered with fibrinous deposit on it. Regional lymph nodes are enlarged and painful. There is hypersalivation. Nikolsky’s symptom is negative. What is the most probable diagnosis?
View question and answer
A 20-year-old patient complains about gingival pain and hemorrhage she has been suffering from for a week. The pain is getting worse during eating, hemorrhage is usually induced by mechanical stimuli. Objectively: there are evident hyperemia and edema of gums in the area of inferior frontal teeth. Apices of gingival papillae are dome-shaped, enlarged. Gum palpation causes pain, slight hemorrhage. No roentgenological changes were revealed. What is the most probable diagnosis?
View question and answer
A 42-year-old patient applied to a dentist and complained about white caseous deposit on the dorsum of his tongue and burning sensation. It is known from the patient’s anamnesis that he underwent treatment in an in-patient hospital on account of pneumonia. What is the most probable diagnosis?
View question and answer
A patient complained about frequent hemorrhages from the mucous membrane of oral and nasal cavities, he mentioned also that his father had the same problems. Objectively: there are multiple telangiectasias and angimatous formations on face skin as well as on mucous membrane of nose, cheeks and lips. Blood count is normal. What is the most probable diagnosis?
View question and answer
Unused stomatological instruments were left on a sterile table in the dental room after the end of working day. What actions should be taken in order to provide sterility of these stomatological instruments?
View question and answer
A 23-year-old patient underwent treatment of pulpitis of her 16 tooth. During endodontic procedure an obstructed distal buccal canal was found. What medications can be applied for chemical dilatation of root canal?
View question and answer
A patient applied to a dentist and complained about periodical pain in his upper jaw. Anamnesis data: the 12 tooth has been previously treated on account of pulpitis. Objectively: crown of the 12 tooth was restored by permanent filling material. X-ray picture of the upper jaw shows a focus of bony tissue destruction near the root apex of the 12 tooth up to 15 mm in diameter. Root canal is filled up to the top. What is the most optimal treatment method?
View question and answer
A 46-year-old patient complains about difficult mouth opening, body temperature rise, edematic tissues around both mandibulotemporal joints. Anamnesis data: 2-3 months ago the patient had undurable mild bilateral pain attacks in the parotidomasticatory areas that lasted for a few days, limited mouth opening, sense of tension and discomfort in some areas of left and right mandibulotemporal joint. What is the most probable provisional diagnosis?
View question and answer
An 11-year-old girl has adentia, the 35 tooth is missing, it was proved roentgenologically. Between the 34 and 33 teeth as well as between the 34 and 36 teeth there are diaereses, the 34 tooth is turned by 30o relative to its glossobuccal direction. What abnormal position does the 34 tooth have?
View question and answer
A 64-year-old patient applied to a dental clinic for tooth prosthetics. Objectively: there is a sharp bony prominence in the area of the missing 15 tooth. It is planned to make a partial removable denture with two-layer base. What plastic should be used for elastic backing?
View question and answer
A dentist was called to a patient being treated in the cardiological department after myocardium infarction. The patient was diagnosed with acute condition of chronic fibrous pulpitis of the 36 tooth. What method of pulpitis treatment should be chosen taking into account grave condition of the patient?
View question and answer
Walls and floor of a dental room were painted with recommended light colours. What is the required coefficient of reflection from the walls, ceiling and floor?
View question and answer
A 7-year-old girl was brought to a hospital for the purpose of oral cavity sanitation. She was born and has been living in an area where fluorine concentration in water makes up 2,5 mg/l. Examination revealed symmetrically placed dark spots on the vestibular surfaces of the 11, 21, 31, 41 teeth as well as on the tubera of the 16, 26, 36, 46 teeth. It is known from the anamnesis that the teeth cut out already with affection. What is the most probable diagnosis?
View question and answer
A dentist applied to a regional sanitary-and-epidemiologic institution for an authorization to open a private dental surgery with 2 universal dental devices. The area of room where he is planning to have surgery hours makes up 26 m2. What area must this room with two universal dental devices have according to the existing regulations?
View question and answer
Examination of a 23-year-old patient revealed chronic candidosis of oral mucous membrane, generalized lymphadenopathy. Anamnesis data: the patient has been suffering from herpes for a year. Body temperature persistently rises up to 37, 4 − 37,5°C, body weight has reduced by 8 kg over the last month. What disease can be indicated by this symptom group?
View question and answer
A 51-year-old lecturer came to the orthopaedic department and complained about painfullness and mobility of his frontal teeth of the lower jaw. Cervices of the 42, 41, 31, 32 teeth are dehisced, III-degree mobility with deep pathological pockets is present. When would it be reasonable to fix dentures after dental extraction?
View question and answer
A 32-year-old patient lost his 41 and 31 teeth as a result of a sporting accident. Replantation is impossible because these teeth have cracks and splits both on crown and root surfaces. Clinical and roentgenological examination proved the possibility of immediate implantation. What implant materials should be preferred?
View question and answer
A 9-year-old child complains about pain and swelling of soft tissues beneath his mandible on the right. Objectively: general condition is satisfactory; there is face asymmetry due to the inflammatory infiltration and collateral tissue edema in the right submandibular area. Crown of the 85 tooth is decayed, mucous membrane of gums in the area of the 84, 85, 46 teeth is hyperemic, edematic; mucogingival fold is flattened. What treatment should be administered?
View question and answer