NBDE Part II Exam With Complete Solution 2023

NBDE Part II Exam With Complete Solution 2023 A 6-year-old patient has a dark brown discoloration of his maxillary central incisor. The discoloration started following trauma accompanied with a facial sinus tract. What is the treatment-of- choice? A. Extraction B. Pulpectomy C. Pulpotomy D. Direct pulp treatment Correct Answer: A. Extraction Squamous cell carcinoma appears in a variety of locations. In which of the following locations is its prognosis the LEAST favorable? A. Lower lip B. Floor of the mouth C. Hard palate D. Buccal mucosa Correct Answer: B. Floor of the mouth Although a dentist wishes to use the long-cone paralleling technique (40 cm sourceobject distance), the x-ray machine is equipped with only a short cone (20 cm PID). As a result, the dentist moves the machine away from the patient's face so the sourceobject distance is 40 cm and adjusts the exposure time appropriately. Compared to the degree of tissue covered by an actual long cone, this "extended" short cone exposes what amount of tissue?