Module 2 with questions.docx - (x)State the purpose of...

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(x)State the purpose of bitewing radiographs. • Show crowns and interproximal spaces of the maxillary and mandibular teeth. • Diagnostic value 1. interproximal or recurrent caries 2. overhangs 3. calculus 4. internal pulp pathology 5. occlusal relationships 6.crestal bone level 6. Which of the following can be determined most accurately from a good bitewing photograph a. Presence of calculus on the teethb. Height of the interdental alveolar bonec. Depths of periodontal pocketsd. Existence of periodontal pocketsAnswer: B (x)Describe how to set up and exposure premolar and molar bitewings. 1. Premolar Bitewing Receptor Placement • Center the receptor on the second premolar • The front edge of the receptor should be mesial to the midline of the mandibular canine - remember there is a dead zone in packet and direct sensor • Place receptor in mouth parallel to the crowns of the upper and lower teeth • Have client/patient close slowly onto the tab to stabilize film
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1. True or False: The distal edge of the receptor should be mesial with the midline of the mandibular canine a. True b. False Answer: False 2. Premolar Bitewing PID Positioning • Set vertical angulation at +8 to +10 degrees prior to placing receptor in patient’s mouth. • Set horizontal angulation prior to placing receptor in patient’s mouth. Align cone with curvature of arch in the premolar area, direct central ray through contact area. • Make sure the PID covers both maxillary and mandibular canines and evenly distributed for maxillary and mandibular teeth • Place receptor lingually and make final adjustments to cone to prevent conecut 1. What is the vertical angulation of the PID for a premolar bitewing? a. -8 to -10 b. +8 to +10 c. +90 d. -90 Answer B 3. Molar Bitewing Film Placement • Set PID at +8 to +10 degrees and align the horizontal angulation with the curvature of the arch in the molar region so that the central ray is directed through the contact areas. • Have the cone equally distributed on maxillary and mandibular teeth. • Center the receptor on the second molar, the front edge of the film should be aligned with the mandibular second premolar’s midline
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1. The distal half of the ___ should show on the premolar international image a. Canine b. First premolar c. Second premolar d. Molar Answer A
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