A new diagnostic test is evaluated against an independent “gold” standard” in 100 subjects with the following results:
True positive = 48
True negative = 8
False positive = 12
False negative= 32
What is the negative predictive value of this new diagnostic test?
A displaced fracture of the mandible courses from the angle to the third molar. This fracture is potencially difficult to treat with a closed reduction because of
A- Injury to the neurovascular bundle
B- Malocclusion secondary to the injury
C- Compromise of the blood supply to the mandible
D- Distraction of the fracture segments by muscle pull
A dentist has planned in-office-bleaching and porcelain laminate veneers for a patient’s maxillary anterior teeth. What would be the best sequence of treatment?
A- Bleaching, 2 week delay, tooth preparation, bonding procedures
B- Bleaching and tooth preparation, 2-5 day delay, bonding procedures
C- Tooth preparation, 2 week delay, bleaching, and bonding procedures
D- Tooth preparation, 2 week delay, bonding, and then bleaching procedures
A 50-year-old man is brought to the emergency department after a high-speed motor vehicle collision. CT scan is obtained and shows a highly comminuted fracture of the mandible involving the symphysis, body, and angle on the left. Which of the following types of vessels supplies perfusion to these mandibular segments?
A 27-year-old woman is evaluated for jaw pain and new-onset malocclusion with anterior open bite, resulting from a fall from a ladder 6 hours ago. X-ray studies show comminuted bilateral intracapsular mandible fractures. Which of the following is the most appropriate treatment?
A) Application of an external fixation
B)Bilateral temporomandibular joint replacements
C) Maxillomandibular fixation for 2 weeks
D) Open reduction and internal fixation
E) Observation with soft diet restriction
What is the LEAST likely reason for postoperative sensitivity after a Class I occlusal composite restoration is placed?
A- Gap formation which allows bacterial penetration into the dentin tubules
B- Gap formation which allows an outward flow of fluid from through the dentin tubules
C- Direct toxic effects of a 15 second acid etc on the pulp
D- Cuspal deformation due to contraction forces of polymerization shrinkage
Which is the best approach for a a patient who becomes very uncomfortable when a planned surgical procedure is discussed?
A- Explain post-operative instruction only after the procedure
B- Explain post-operative instructions, obtain informed consent, and help the patient to resolve anxiety before the procedure
C- Explain and obtain only informed consent before the procedure, and apologize for making the patient uncomfortable
D- Explain and obtain informed consent before the procedure and explain post-operative instructions after the procedure
A patient’s measured stimulated salivary flow volume is 0.5 ml/minute. The term that best describes this condition is
B- Normal salivary flow
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