HomeKROK Question Archive
KROK Question Archive
KROK 2 Dentistry 2009 Questions | KROKEXAM
Browse 2009 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
200 Questions81828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120
A month after cementing the metal-ceramic crown on the 23 tooth a patient complained of its decementing. Examination revealed that the tooth stump was of sufficient height, stump walls were convergent to the vertical tooth axis at an angle of approximately 30 degrees. What angle of convergence had to be formed?
View question and answer
During lateral movements of mandible the frontal teeth are displaced sidewards. Deviation of incisor point from the central position is measured by an angle of 100 — 110°. What is characterized by such a value of incisor point deviation?
View question and answer
Parents of a 1,5-year-old child complain about the child's tongue enlargement and ingestion disorder. The child has been suffering from this since birthday. Objectively: general condition has no peculiarities. The tongue is enlarged (macroglossia). Its mucous membrane exhibits granular vesicular outgrowths. The tongue is dense, painless on palpation. What is the most likely diagnosis?
View question and answer
A 52-year-old patient complains of significant tooth wear on both jaws. Objectively: in the lateral parts of mandible teeth are worn down to the gums, in the frontal parts teeth are worn by 1/3. Treatment includes two stages. What prosthetic construction should be applied for bite disjoining and myotatic reflex change?
View question and answer
A girl is 18 months old. Vestibular surfaces of the 52,51,61,62 teeth have wide carious cavities within enamel. Probing is slightly painful, percussion of the 52,51, 61,62 is painless. What is the treatment of choice?
View question and answer
A 53-year-old patient consulted a prosthodontist about dental prosthetics. Objectively: the 13 and 24 teeth remain as well as all the teeth on the lower jaw. The lower third of the patient's face is shortened, crowns of the 13, 24 teeth are worn off by 2/3. What constructional element will provide optimal fixation of the partial removable prosthesis on the upper jaw?
View question and answer
Parents of a 6-year-old child applied to a pedodontist for preventive examination of their child. The oral cavity is sanitized. According to the parents, the child has recently cut the 36 and the 46 tooth. What method of caries prevention should be applied within 1,5-2 years after cutting of the mentioned teeth?
View question and answer
Examination of a 6-year-old girl revealed a deep carious cavity in the 85 tooth. Percussion and probing are painless. After removal of the softened dentine communication with the tooth cavity showed up. Deep probing is painless. X-ray picture of the 85 tooth shows the focus of destruction of bone tissue in the region of bifurcation; cortical plate of the 35 has no pathological changes. It is most expedient to use the following material for the root filling:
View question and answer
A 48-year-old patient got a pustule on his chin that quickly developed into a dense and acutely painful infiltration 3x5 cm large. The skin above it is of blue-red colour. In the centre one can see three zones of necrosis around the hair follicles. Lymph nodes of chin are enlarged and painful. What is the most likely diagnosis?
View question and answer
A patient applied to the oral surgery department and complained about pain and edema in the right infraorbital region and right zygomatic region, skin numbness in the area of the right half of his upper lip; nasal hemorrhage. These symptoms turned up after a trauma. What disease should be suspected?
View question and answer
A 56-year-old patient has an oval, smooth, bright-red erosion on the red border of her lower lip. Erosion is covered with haemorrhagic crusts that can be hardly removed. Crust removal induces slight hemorrhage. Light traumatization of crust-free surface of erosion induces no hemorrhage. Specify the type of lower lip precancer:
View question and answer
A 12-year-old child complains about bleeding from the tooth socket during eating and tooth brushing. The tooth has hurt him before. Objectively: the 36 tooth has a deep cavity communicating with the tooth cavity and filled with red excrescences. Probing causes pain and slight hemorrhage; percussion is painless, thermal stimuli cause mild pain. What is your provisional diagnosis?
View question and answer
A 23-year-old patient complains about gingival hemorrhage during tooth brushing and eating solid food. Objectively: gingiva of the frontal part of mandible is hyperaemic, edematic, it bleeds on palpation. Mucous membrane of the oral cavity as well as gingiva in other regions present no changes. The patient has deep overbite. Teeth are stable except for the 41 and 31 (I degree of mobility). X-ray picture shows resorption of interalveolar septa by 1/3 of root length in the region of the 42, 41, 32, 31 teeth. What is the most likely diagnosis?
View question and answer
A 13-year-old patient complains about gingival hemorrhage during tooth brushing. Objectively: gums around all the teeth are hyperemic and edematic, PMA index (papillary marginal alveolary index) is 46%, Greene-Vermillion hygiene index is 2,5. Provisional diagnosis: exacerbation of chronic generalized catarrhal gingivitis. This patient should be recommended to use a toothpaste with the following active component:
View question and answer
A 30-year-old patient has got an edema and hyperemia of nose wing skin spreading to the skin of his upper lip and cheek. Examination revealed a fissure along the infra-external edge of the left nostril. The skin is tense, dense, red-and-cyanotic, skin line pattern is smoothed; rise of local temperature is present. The zone of affection is well-defined and irregularly shaped. What is the most likely diagnosis?
View question and answer
On the second day after tooth extraction a 35-year-old woman applied to a facial surgeon and complained about pain in the parotid-masticatory region and sensation of lacking contact between the upper and lower jaw teeth on the right. Examination revealed chin deviation to the left, halfopen mouth, closed lips, disturbed occlusion. There is also limitation of lateral mandible movements. In front of the right ear tragus soft tissues sink down. What examination is expected to be the most informative in this case?
View question and answer
A 50-year-old patient has a defect of the lower dental arch. It is planned to make an implant-supported bridge for its restoration. X-ray picture shows that the height of the bone mass from projection of mandibular canal up to the top of alveolar crest is 2 cm. What type of implant should be applied?
View question and answer
A 10-year-old child undergoes sanitation of the oral cavity. The girl was found to have chalky spots on the vestibular surfaces in the precervical region of the 21 and 12 teeth. Enamel surface is dull, smooth. Pain reaction to the temperature stimuli is absent. What additional method of examination is expected to confirm the diagnosis?
View question and answer
A 20-year-old patient complains about pain and hemorrhages in the region of the 36 tooth occuring during eating solid food. Objectively: medial masticatory surface of the 36 tooth has a large carious cavity occupied by a carneous tumour-like formation, probing induces hemorrhage and pain in the region of connection of the carious cavity with the pulp chamber. Percussion is painless. Electroodontodiagnosis is 40 microampere. Roentgenological changes are absent. What is the most likely diagnosis?
View question and answer
An infant was born full-term with body weight at a rate of 3200 g and body length at a rate of 53 cm. It was the first physiological delivery. What position of child's mandible is usually observed after birth?
View question and answer
A 14-year-old child has orthodontic indication for extraction of the 14 tooth. What forceps should be applied for extraction of the 14 tooth?
View question and answer
A 14-year-old child was undergoing extraction of the 16 tooth on account of chronic periodontitis. During the tooth extraction it came to perforation of maxillary sinus along with penetration of the distal buccal root into the maxillary sinus. What is the further dentist's tactics?
View question and answer
A 2-month-old child is anxious, sleeps badly, refuses food, has subfebrile body temperature. Objectively: hyperaemic mucous membrane of the child's tongue, lips, cheeks and palate has a caseous coating that can be easily removed with a tampon. Regional lymph nodes are slightly enlarged and painful on palpation. What disease are these symptoms typical for?
View question and answer
A 35-year-old patient complains about progressing throbbing pain in the 26 tooth. Objectively: the 26 tooth has a carious cavity filled with softened dentine, tooth cavity is closed, probing of the cavity floor is painless, percussion causes acute pain. There is I degree tooth mobility. Roentgenological changes are absent. What is the most likely diagnosis?
View question and answer
A patient complains of burning, itch and lower lip enlargement. He has been suffering from this for a long time. Objectively: the patient's face is asymmetric due to the flattening of nasolabial fold. His lower lip is edematic, of normal colour, painless on palpation. The patient has plicated tongue. What is your provisional diagnosis?
View question and answer
A 30-year-old patient consulted a dentist about a cosmetic defect and slight pain in the 44 tooth during tooth brushing. Objectively: there is a Black's class V carious cavity within mantle dentine. Probing of the cavity walls causes slight pain, thermal probe is positive. What filling material is to be chosen for restoration of this cavity?
View question and answer
An 18-year-old patient complains of short-term pain in the 37 tooth caused by sweet and cold stimuli. Objectively: masticatory surface of the 37 tooth has a carious cavity within mantle dentine. The cavity is filled with softened dentine. Probing of the cavity walls induces pain in the region of dentinoenamel junction, electroodontodiagnosis is 6 microampere. What is the most likely diagnosis?
View question and answer
A 24-year-old soldier was injured by a shell splinter. He was diagnosed with a mandibular fracture with a bone defect in the mental region over 2 cm long. What method of fixation of mandible fragments is indicated?
View question and answer
A 35-year-old female patient consulted a dentist about a painless, slowly growing neoplasm in the area of the 11 and 12 teeth. Examination revealed that the tumour was light-pink, flattened, adjacent to the teeth, had a pedicle. The tumour was up to 1,5 cm large, with smooth surface and dense consistency. It was diagnosed as an epulis in the regiob of the 11 and 12 teeth. What form of epulis are these clinical findings typical for?
View question and answer
A 49-year-old patient applied to the oral surgery department and complained about permanent intense dull pain in the region of the right upper jaw. It is known from the anamnesis that the 17 tooth has been repeatedly treated for exacerbation of chronic periodontitis but the treatment appeared to be ineffective. What kind of anesthesia should be applied for extraction of the 17 tooth?
View question and answer
Stomatological examination of a child revealed abnormal form of the central incisors: they are barrel-shaped, there is a semilunar groove on the cutting edge. It is known from the anamnesis that the child's mother had syphilis during pregnancy. Besides the dental abnormality the child presents also with deafness and parenchymatous keratitis. This abnormality of tooth development is called:
View question and answer
A patient ordered partial removable lamellar dentures for the upper and lower jaw. An orthodontist made elastic alginate impressions of both jaws. What is his next step?
View question and answer
A 12-year-old patient complains about an aesthetic defect. Objectively: the lower third of face is shortened, upper frontal teeth overbite the lower teeth by 3/3 of height, exhibit oral inclination, lateral parts all along exhibit cusp-to-cusp relationship between the antagonists; Angle's class II malocclusion (joining of the upper permanent molars) is also present. Malocclusion is observed in the following planes:
View question and answer
A 65-year-old patient consulted a prosthodontist about fabrication of an external prosthesis of orbit that was lost as a result of a trauma. What is the fixing element of the orbit prosthesis?
View question and answer
A 56-year-old patient needs a partial removable lamellar denture. Objectively: the 17,16,15,14,25,26,27,28 teeth on the upper jaw are missing. In order to provide transversal line of clasps the clasp arms should be placed upon the following teeth:
View question and answer
A 56-year-old patient consulted a prosthodontist about pain underneath the bar of her clasp prosthesis. It is known from the anamnesis that the clasp was placed in another city a week ago. Examination revealed a mechanic injury of mucous membrane of the palatine vault caused by the bar of the clasp prosthesis. What distance should exist between the palate and the bar of the clasp prosthesis in order to prevent this complication?
View question and answer
A 47-year-old patient complains about limited mobility of her lower jaw in the morning; periodical dull pain in the right temporomandibular joint (TMJ) and general joint stiffness. According to the patient, the stiffness disappears throughout the day after joint "exercising". Objectively: the patient's face is symmetric, mouth opening is limited down to 2,5 cm, there is also joint clicking. Median line deviates to the right by 3-4 mm, palpation of the right articular head is painless. What is your provisional diagnosis?
View question and answer
A 50-year-old patient complains about problems with mastication, tooth mobility, halitosis, gingival hemorrhages. Objectively: gums are hyperemic with cyanotic colouring, there is dental calculus. Parodontal pouches of the superior molars are 8 mm deep, the pouches of other teeth are 6 mm deep. X-ray picture shows resorption of bone tissue by 2/3-1/2 of root length. What is the most likely diagnosis?
View question and answer
An 18-year-old patient complains about gingival enlargement, pain and hemorrhage when eating solid food. Objectively: hyperaemia, gingival edema, hypertrophy of gingival edge up to 1/2 of crown height by the 12, 13, 14 teeth. Formalin test is painless. What is the most likely diagnosis?
View question and answer
A 34-year-old patient got a trauma (fall) that resulted in mobility of alveolar process and all the upper jaw teeth, occlusion was also changed. X-ray picture depicts the fracture line that runs in both directions from the piriform opening along the floor of maxillary sinus. What is the most likely diagnosis?
View question and answer