HomeKROK Question Archive
KROK Question Archive
KROK 2 Dentistry 2019 Questions | KROKEXAM
Browse 2019 KROK 2 Dentistry exam questions with answers and explanations.
Exam questions
400 Questions361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400
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 vermillion 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 fibrinous incrustations; the erosions are sharply painful on palpation. What is the most likely diagnosis?
View question and answer
During preventive examination a patient was diagnosed with precancerous hyperkeratosis of the lower lip vermillion border. What treatment should be prescribed?
View question and answer
A removable partial laminar denture for the upper jaw is being made for the patient. The central occlusion is determined and fixed. What stage is next?
View question and answer
A 32-year-old man was diagnosed with chronic fibrous pulpitis of tooth 27. Vital extirpation is chosen as the treatment method. Amide anesthetic is to be used for tuberal and palatal anesthesia. What anesthetic solution needs to be administered in this case?
View question and answer
A removable full denture for the lower jaw is being made for a 75-year-old man. Objectively the alveolar process is slightly atrophied. Herbst tests are performed during fitting of an impression tray. When lips are stretched forwards the tray slips off. Where should the tray edge be shortened in this case?
View question and answer
A 12-year-old boy is in the dental office to complete the treatment of chronic periodontitis exacerbation in the 36 tooth. There are no complaints. Objectively: occlusive dressing of the 36 tooth is intact; tooth percussion is painless; there are no pathologies of the mucosa surrounding the 36: palpation is painless. What material is the most advisable for root canal filling in this case?
View question and answer
A 35-year-old man needs an adhesive dental bridge. Objectively tooth 15 is missing. Abutment teeth 14 and 16 are firm. Teeth crowns are of medium height. Dental equator is markedly visible. The patient has orthognathic occlusion. What will most likely be an abutment part of this adhesive denture?
View question and answer
A 30-year-old man complains of lost dental filling on his upper right jaw. Objectively in tooth 16 there is a deep carious cavity filled with dense pigmented dentin. What dentin layer forms as the result of tooth irritation in the course of caries process?
View question and answer
A 70-year-old man has edentulous maxilla. Objectively maxillary tuberosity and alveolar processes are completely atrophied; palatine vault is flat, its mucosal layer is moderately pliant. In this case the patient’s atrophic edentulous maxilla can be classified as:
View question and answer
An 8-year-old boy complains of a dull pain in his lower right tooth. The pain appears in response to thermal stimuli and slowly abates after the stimuli are removed. Objectively on the approximal surface of tooth 46 there is a deep carious cavity. During necrectomy with a dental excavator, communication between the carious and dental cavities is detected. Probing of the communication area results in sharp pain and bleeding. What method of pulpitis treatment is recommended in this case?
View question and answer
A 25-year-old man was diagnosed with acute deep caries of tooth 13, Black class V Photopolymer composite material is planned to be used for aesthetical restoration of tooth. What material should be used as a lining for the floor of the carious cavity in this case?
View question and answer
A 10-year-old boy complains of acute pain attacks in the area of his upper left teeth. The toothache persisted for a night. Objective examination revealed a carious cavity on the masticatory surface of the 26 tooth within parapulpar dentin. Probing is sharply painful at all points of the cavity floor. Markedly positive reaction to cold water stimulus is observed. Select the most likely diagnosis:
View question and answer
A 46-year-old man needs a classic 2-stage surgical installation of implants into the upper jaw. How long should be the interval between stages 1 and 2?
View question and answer
The maxillofacial surgery unit received a patient with complaints of inability to close his mouth. This condition occurred when the patient was biting an apple. Objectively there is a frightened expression on the patient’s face, the mouth is open wide, the chin is displaced to the left, salivation is observed. Palpation through the external acoustic meatus detected no movements of the right articular head. What is the most likely diagnosis?
View question and answer
A 46-year-old man, a teacher, complains of lower teeth mobility that impedes the process of biting. Objectively the dentition is uninterrupted, front teeth demonstrate the II-degree of mobility. X-ray shows straight and filled root canals of 32, 31. 41, and 42. What appliance will stabilize front teeth while retaining their aesthetic appearance?
View question and answer
A 14-year-old boy complains of rapid wearing-off of tooth crowns. Objectively: tooth crowns are worn-off by 1/3. Enamel easily chips off and is pale gray in color. Make the diagnosis:
View question and answer
During his shift a dentist of the prosthodontics unit has consulted and examined the patient, checked the crowns, installed dental bridges, measured centric jaw relation, and made necessary corrections to the removable dentures. What is the normal workload of a dentist per shift and per month measured in arbitrary units of labor intensity (AU) in a five-day work week and according to the normatives for provision of healthcare to the adults?
View question and answer
Parents of a 5-year-old child came to the dentist for sanation of the child’s oral cavity. Objectively on the masticatory surfaces of teeth 54, 64, 74, 75, and 85 there are carious cavities within the softened mantle dentin. The child is anxious and misbehaves. What treatment tactics would be optimal in this case?
View question and answer
A 22-year-old man is referred for extraction of tooth 36. In the office of the dental surgeon before the anestehesia was given to him he felt weakness and developed tinnitus and visual blackout. Objectively the face is pale and covered in cold sweat, blood pressure is 110/70 mm Hg. For several seconds the patient was unconscious. What complication occurred during the visit to the dentist?
View question and answer
A 35-year-old man suffers from localized periodontitis of the front teeth on his lower jaw. Objectively on the upper jaw his dentition is uninterrupted, while on the lower jaw teeth 48, 47, 46, 45, 35, 36, 37, 38 are missing, other teeth present with mobility of the II-degree, tremata, and diastema. What tactics should a prosthodontist choose in this case?
View question and answer
A 53-year-old patient complains of an ulcer on the lateral surface of the tongue. The ulcer appeared 6 months ago in the result of a trauma caused by sharp tip of the 37 tooth metal crown. A dentist replaced the crown with the one of better quality and prescribed keratoplastic drugs. Despite these measures the ulcer continues to grow. Lately there has been pain during talking, chewing, swallowing; sometimes the pain irradiates to the pharynx. Objectively: on the lateral surface of the tongue there is a painful ulcer with uneven raised dense margins and lumpy floor covered with grayish necrotic coating. What diagnosis is most likely?
View question and answer
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:
View question and answer
A 13.5-year-old girl complains of swollen gums that bleed when she brushes her teeth. This condition has been observed for the last half a year. Objectively gingival mucosa surrounding the front teeth of the upper jaw is swollen and cyanotic. Interdental papillae are round, dense, and enlarged, they cover the crowns by 1/3 of their height. Teeth 13 and 23 are positioned vestibularly. Make the provisional diagnosis:
View question and answer
The parents of a 3-year-old child came to the orthodontist. They complain of an aesthetical defect in the teeth of their child. The child has a history of tongue sucking habit. In the front region there is a vertical fissure 5 mm. What orthodontic appliance is indicated for the treatment of this pathology?
View question and answer
After a clasp-retained (bugel) maxillary denture is made, it is necessary to assess the quality of the newly-made construction. Width of the denture arch should be:
View question and answer
A 35-year-old woman has complaints of cosmetic defects of the front upper teeth crowns. The defects have been aggravating for the last 10 years. The patient suffers from unpleasant sensations when brushing her teeth, and when chemical stimuli are applied. Objective examination revealed defects localized in the enamel of the front upper teeth vestibular surface. The defects are oval, saucer-shaped, and have clear margins. Response to probing and cold stimuli was positive. Make the diagnosis:
View question and answer
Objective examination of a 10-year-old child revealed slight hyperemia, infiltration, and dryness of the whole surface of the vermillion border. Architectonics of the lips is disturbed. Dryness and contracted sensation are observed in the lips, especially during cold seasons. Make the provisional diagnosis:
View question and answer
A non-removable porcelain-fused-to- metal dental bridge is being made for a 35-year-old woman. Two-layer impressions were obtained using ’’Silafex" silicone material. The impression were sent for disinfection. What antiseptic should be used to process the impressions?
View question and answer
A 38-year-old man, an arc welder, is a chain smoker. He came to the dentist to have a denture made for him. Howerver, in the middle of his lower lip against the background of unchanged vermillion border there is a gray-white polygonal lesion 6x4 mm with clear margins. The lesion is covered with tightly attached small scales and is level with the vermillion border (neither protruding nor retracted). Palpation of the lesion focus is painless, the lesion has no thickened base; lateral palpation detects thickened surface of the lesion. Regional lymph nodes are unchanged. Make the provisional diagnosis:
View question and answer
A 2.5-year-old child has fever up to 38.5°C, low appetite, rashes in the oral cavity. The disease onset was 3 days ago. Objectively: the skin of the perioral area is covered in scarce vesicles with clear content. Within the oral cavity on the buccal and lingual mucosa there are sharply painful erosions, 2-3 mm in size, with white coating and hyperemic crown. The gums are swollen, hyperemic. The submandibular lymph nodes are enlarged, painful on palpation. Make the diagnosis:
View question and answer
The 15 tooth must be extracted. Tire tooth crown is retained. What instrument should be used in this case?
View question and answer
A 27-year-old woman complains of an aesthetical defect in the area of her upper central incisors. She was diagnosed with chronic deep caries, Black class IV Aesthetic restoration of teeth 11 and 21 is planned. What material has optimal combination of strength and aesthetical properties?
View question and answer
An 18-year-old young man complains of tooth sensitivity in his lower left jaw when eating sweet food. Examination shows enamel defects in the fissures on the masticatory surface of tooth 37. The enamel there is dull white and fragile when (chips off) probed. Make the diagnosis:
View question and answer
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 fixation of the denture and even load distribution the following functional impression should be made:
View question and answer
A 54-year-old patient is prescribed full cast porcelain-fused-to-metal dental bridges for the upper and lower jaws. What type of impression material should be chosen in this case?
View question and answer
How often should a dentist’s office be thoroughly cleaned?
View question and answer
A porcelain-fused-to-metal crown for tooth 11 is being made for the patient. The tooth will be left vital. What measures should be taken during treatment to prevent pulpitis in this tooth?
View question and answer
An 8-year-old girl complains of bleeding gums. The child has diabetes mellitus. Objectively the interdental papillae between the teeth of the upper and lower jaw are hyperemic, swollen, and cover the crowns by 1/3 of their height. The teeth exhibit mobility of the I degree. What investigation technique is necessary for diagnosis-making in this case?
View question and answer
An 8-year-old child was diagnosed with acute odontogenic mandibular periostitis on the right originating from tooth 74. What treatment method would be optimal in this case?
View question and answer
A 12-year-old boy, due to trauma of the 44-th and 45-th teeth area, suffers from the following: pathologic displacement of the mandibular alveolar process; rupture of the alveolar process mucosa. What additional examination is necessary to specify the diagnosis?
View question and answer