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 Questions41424344454647484950515253545556575859606162636465666768697071727374757677787980
A patient consulted an oral surgeon about pain in the region of his left upper jaw that appeared 3 days ago. After examination the patient was diagnosed with exacerbation of chronic periodontitis of the 17 tooth. It is indicated to extract the 17 tooth. What nerves should be blocked for painless extraction of the 17 tooth?
View question and answer
A 40-year-old patient complains about frequent falling out of a filling. Objectively: the 46 tooth has a carious (Black's class II) cavity. It is planned to restore the anatomic form of the tooth by means of a metal inlay. What is the peculiarity of the cavity preparation for the inlay in this case?
View question and answer
A 10-year-old child complains about acute spontaneous spasmodic pain in an upper jaw tooth on the left. Objectively: distal contact surface of the 26 tooth exhibits a carious cavity filled with light softened dentine and localized within parapulpar dentine. Probing of the cavity floor causes acute pain, percussion is painless. Cold stimuli cause a long-standing pain attack. The child has a history of li-docaine allergy. Choose an optimal paste to be used during the first visit:
View question and answer
A 35-year-old patient complains about itch, burning and edema of lips. He has been suffering from this for a week. Objectively: reddening of red border and skin, especially in the region of mouth corners, there are also vesicles, crusts, small cracks along with erythematous affection of red border. What is the most likely diagnosis?
View question and answer
Preventive examination of an 8-year-old boy revealed some lusterless chalklike spots on the vestibular surface of the 11 and 21 teeth, which are localised in the precervical region. Subjective complaints are absent. What is the most likely diagnosis?
View question and answer
A 27-year-old patient complains about acute pain in the region of the 34 tooth that is getting worse when biting down on food. Roentgenographical survey revealed an ill-defined zone of bone tissue destruction in the periapical region of root of the 34 tooth. What is the most likely diagnosis?
View question and answer
A patient undergoes orthopaedic treatment of bounded edentulous spaces on the upper jaw. He needs fixed full-cast dentures. During his second visit it is required to check whether the internal surface of the metal framework of the future metal-ceramic denture matches the surfaces of the prepared teeth. In what way could this be done?
View question and answer
An 18-year-old female patient consulted a dentist about dental prosthetics. Objectively: the 21 tooth is pulpless, of dark-grey colour. The patient has orthognathic occlusion. It is planned to crown the tooth with a plastic crown. Choose the plastic mass for its fabrication:
View question and answer
A 47-year-old patient complains about permanent pain in the 27 tooth that is getting worse when biting down on food. Objectively: the patient's face is symmetric, skin is of normal colouring, the mouth can be fully opened, mucous membrane of the alveolar process is edematic and hyperemic at a level of the 27 tooth. The 27 tooth has a deep carious cavity interconnecting with pulp chamber. Percussion of the 27 tooth causes acute pain. What is the most likely diagnosis?
View question and answer
A 64-year-old female patient was waiting for her turn at the dentist's. Suddenly she fell down, her respiration became hoarse, she got convulsive twitching in her upper and lower limbs, face and neck turned cyanotic, eye pupils became mydriatic, reaction of eye to light was absent. Arterial pressure and pulse couldn't be measured. Heart sounds couldn't be auscultated. Involuntary urination was noted. What condition is characterized by such symptoms?
View question and answer
A 3-year-old child complains of a cavity in a lower jaw tooth. Objectively: masticatory surface of the 84 tooth exhibits a carious cavity within mantle dentine. Dentine is softened, probing of the cavity walls is painful, percussion is painless. What is the most likely diagnosis?
View question and answer
A 43-year-old patient complains about a neoplasm in the right submandibular region that appeared a month ago after angina. Body temperature is up to 37,0 — 37, 2°C. The patient underwent anti-inflammatory therapy but it led to no reduction of the neoplasm. Objectively: in the right submandibular region palpation reveals a slightly painful, spherical, freely movable, well-defined neoplasm of dense and elastic consistency. The duct of submandibular salivary gland discharges transparent saliva. The sublingual plica is unchanged. What is the most likely diagnosis?
View question and answer
A 38-year-old patient ordered a clasp upper jaw prosthesis. Its fabrication involves forming of a fireproof model. What material should be applied for duplication?
View question and answer
A 35-year-old patient needs a metal inlay for the 37th tooth. Objectively: masticatory surface of the 37 tooth has a carious cavity. What is the peculiarity of tooth preparation?
View question and answer
A 64-year-old patient complains about a slightly painful ulcer on the lateral surface of his tongue that appeared over 2 months ago. Objectively: lateral surface of tongue has an ulcer with raised edges, tissues around it are infiltrated. Submandibular lymph nodes are enlarged, adhering to each other and surrounding tissues. What is your provisional diagnosis?
View question and answer
A 56-year-old patient complains about missing lateral teeth on both sides of mandible. Objectively: the 48, 47, 46, 45, 35,36,37,38 teeth are missing. Make a diagnosis:
View question and answer
A 4-year-old child got a face trauma 2 hours ago. A stomatologist on duty made a diagnosis: intrusive luxation of the 61 tooth. What is the tactics of choice?
View question and answer
An 18-year-old student complains of roughness and dryness of mucous membrane of the oral cavity. He always bites uncontrolledly off mucous membrane along the line of teeth joining. The patient suffers from chronic cholecystitis, he is smoker. Hygiene index is 2,3. Objectively: mucous membrane along the line of teeth joining is quaggy, edematic, whitish. What is the leading factor of this disease development?
View question and answer
A 57-year-old patient complains about dryness and burning of the lateral surface of her tongue. These sensations disappear during eating. She noted such sensations three months ago. She has a history of gastritis with reduced secretory function. Objectively: mucous membrane of tongue and oral cavity has no peculiarities. The back of tongue has thin white coating. Regional lymph nodes are unpalpable. Oral cavity is sanitized. What is the most likely diagnosis?
View question and answer
A 23-year-old patient complains about a carious cavity in the 15 tooth that he noted a year ago. Examination revealed that approximal surface had a deep carious cavity not communicating with the tooth cavity and filled with dense pigmented dentine. Probing, cold test, percussion cause no pain. Electroodontodiagnosis is 10 microampere. What is the most likely diagnosis?
View question and answer
A 7-year-old child complains about spontaneous pain in the upper right molars. Both medial contact and masticatory surfaces of the 55 tooth have a carious cavitiy filled with clear softened dentin and localized within parapulpar dentin. Floor probing causes acute pain, tooth percussion is slightly painful. Mucous membrane of the alveolar process in the root projection of the 55 is intact, examination of this region revealed no roentgenological changes. What is the most likely diagnosis?
View question and answer
A 55-year-old patient has a repeated appointment with a dentist. He has ordered complete removable lamellar dentures for both upper and lower jaw. During his previous visit the dentist took complete anatomic impressions of both jaws and sent them to the dental mechanic. What manipulations should the dentist perform at the next clinical stage?
View question and answer
A 33-year-old patient complains about pain, gingival hemorrhage, halitosis, body temperature rise up to 37,8°C. Objectively: gums are apparently hyperaemic, edematic, bleed easily, parodontal pouches are 34 mm deep, and contain purulent exudate. Orthopantomogram shows diffuse osteoporosis of alveolar process, resorption of interdental septa down to 1/3 of their height. What is the most likely diagnosis?
View question and answer
An 8-year-old boy complains about acute short-term pain in the 11 tooth caused by cold and sweet stimuli. Objectively: medial contact surface of the 11 tooth has a carious cavity within denti-noenamel junction filled with softened moist dentine that can be easily removed. Enamel edges are white, undermined, friable. Superficial probing is painless, thermal test is positive, percussion is negative. What is the filling material of choice?
View question and answer
A 40-year-old patient complains about body temperature rise up to 38°C, and of a roundish infiltration on his upper lip. Objectively: there is a roundish infiltration on the upper lip on the left, the skin above it is wine red, the infiltration adheres to the surrounding tissues and has a seapus necroticus in the middle. The upper lip is hyperaemic and edematic. What is the most likely diagnosis?
View question and answer
A female patient complains about pain in the 11 tooth caused by sour and sweet food. Objectively: enamel changes in form of chalky appearance, a defect with light bottom within dentinoenamel junction on the vestibular surface in the precervical area of the 11 tooth. Probing was painless, percussion and cold stimulus caused no pain. What is the most likely diagnosis?
View question and answer
A 69-year-old patient needs extraction of the 12, 11 teeth. He is diagnosed with generalized periodontitis, the 12 and 11 teeth exhibit II-degree mobility. Choose a proper instrument for extraction:
View question and answer
An 8-year-old child presents with an edema of the submandibular region, the mouth can be opened by 1,5 cm, further opening is difficult, body temperature is 37,6°C, mucogingival fold is vestibularly flattened, hyperaemic and swollen. The 84 and 85 teeth have fillings, their percussion is painless. The 84 tooth exhibits I degree mobility. What is the most likely diagnosis?
View question and answer
A 25-year-old patient has a median fracture of mandible without evident displacement of fragments. All the teeth are intact. What kind of wire splint is the most appropriate in this case?
View question and answer
A 19-year-old patient complains about pain in the submental part of mandible. The day before he got a trauma. Objectively: there is a slight swelling of tissues in the mental area. The mouth can be opened widely enough. All the teeth are intact. Mucous membrane is edematic in the region of central incisors, it bleeds slightly. In this region mobility of mandible fragments is present. Occlusion is undisturbed. What splint should be chosen by the dentist?
View question and answer
A 25-year-old man complains of itching and reddening of skin in the buccal area, general weakness, inertness. He associates origin of the disease with a skin injury he got during shaving. Objectively: body temperature is 39,0°C. A well-defined section of skin in the buccal area is hyperemic, it slightly protrudes above the surface. Hyperemic surface has some vesicles containing serous fluid. What is the most likely diagnosis?
View question and answer
A 30-year-old saxophonist complains about wearing of the occlusal surface of his frontal teeth along with separation between the upper and lower teeth (apertognathia). Height of the lower third of the patient's face remains unchanged. What method should be applied for elimination of this deformity?
View question and answer
A 32-year-old patient complains about mouth soreness, body temperature rise up to 38,5°C, indisposition. Such condition has been occurring periodically for several years after the patient had had a cold. Objectively: lips are covered with haemorrhagic crusts, hyperaemic mucous membrane of lips and cheeks has erosions covered with fibrinous films. Hypersalivation is present. What is the most likely diagnosis?
View question and answer
Examination of a patient revealed a roundish neoplasm in the submental area. Skin above it is unchanged, makes a fold easily. Puncture sample contains strow-yellow liquid with cholesterol admixture. What is the most likely diagnosis?
View question and answer
A 13-year-old girl complains about frequent falling out of a filling in the 21 tooth. It is known from the anamnesis that 2 years ago she underwent treatment on account of a dental trauma. Objectively: a transverse defect of 1/3 of the crown in the 21 tooth. Percussion is painless. Tooth colour is unchanged. X-ray picture shows that root canal is filled by 1 mm from the apex, filling material closely fits the walls of root canal. What stomatological tactics should be chosen?
View question and answer
A 35-year-old patient was diagnosed with chronic median caries of the 36 tooth. There is a Black's class II cavity affecting masticatory surface. What material should be chosen for the tooth filling?
View question and answer
A 79-year-old female patient consulted a prosthodontist about denture replacement. The patient has a history of a stroke. Objectively: acute irregular atrophy of the alveolar processes of both jaws is present; mucous membrane of the oral cavity is dry and nonmobile. The previous dentures cannot be fixed. What is the most appropriate prosthetic construction?
View question and answer
A 48-year-old teacher complained about considerable mobility of the 42, 41, 31, 32 teeth. Objectively: cervixes of the 42, 41, 31, 32 are exposed by 2/3, there is pathological III-degree mobility. It is indicated to extract the 42, 41, 31, 32 teeth. What type of denture should be used for the direct prosthetics?
View question and answer
Examination of a 13-year-old patient allowed to make a final diagnosis: vestibular position of the 13 and 23 teeth with the total space deficit, narrowing of maxillary dental arch, torsion of the 12 and 22 tooth. To eliminate this pathology it was suggested to widen the dental arch and to extract some teeth. What teeth have orthodontic indication for their extraction?
View question and answer
Parents of a 2-year-old girl complain about fistulas with purulent discharge in the region of the upper frontal teeth. Objectively: crowns of the 51, 52, 61, 62 teeth are significantly decayed, probing of root canal orifices is slightly painful, it causes significant hemorrhage. Percussion is painless. Mucous membrane of the alveolar process is pastose and cyantotic, there are cicatrices and fistulas in this region. What is the most likely diagnosis?
View question and answer