OHIO EFDA BOARD EXAM STUDY QUESTIONS WITH EXPERT GRADED A+ ANSWERS

OHIO EFDA BOARD EXAM STUDY QUESTIONS WITH EXPERT GRADED A+ ANSWERS 1. For maxillary teeth what position should the patient be in - ANSWER Supine 2. what is the most common grasp - ANSWER The pen grasp and the modified pen grasp 3. the compressive strength of amalgam 20 mins after placement - ANSWER 6% 4. what is the vice - ANSWER is a box shaped at the lower end of the retainer that has an opening for threaded spindle to move in and out of. 5. what functions as a receptacle for the side and ends of the matrix - ANSWER guide slot in the vice 6. where will the larger diameter of the band be placed - ANSWER larger openings best adapt to the occlusal poration of the tooth crown. when the smaller openin adapts to the constricted cereal portion of the crown. 7. The junction of two walls within a cavity prepartion is known as ? - ANSWER Line angle 8. Most amalgam contains approximatelly what perecent of mercury ? - ANSWER 50% 9. when the dentist places a pin at what location is it placed ? - ANSWER into dentin on the pulpal floor 10.Two types of restorations are taken slightly out of occlusion - ANSWER class Iv ( 4) and temp restorations maxillary teeth what position should a patient be in ? - ANSWER supine 12.Placing a gingival retractor - ANSWER facial and lingual class V restorations punch the rubber dam displacing the hole facially 3-6 mm. are bases and liners used for ? - ANSWER bases and liners are used to protect the pulp or to aid in its recovery, or both. 14.A minimal depth restoration - ANSWER extends about 0.5mm- 1.5mm into dentin ate depth - ANSWER 1mm into dentin, but more than 0.5mm from the pulp is criteria for good proximal contact on class II restoration ? - ANSWER Contact visibly closed, should resist floss without fraying, contact located on occ half of tooth 17.The traingular ridges of which two cusps form the oblique ridge - ANSWER mesiolingual and distobuccal to stabilize the rubber dam - ANSWER ligating the tooth farthest from the clamped tooth are bases and liners used for - ANSWER bases and liners are used to protect the pulp or to aid in its recovery, or both. 20.What is pulpitis? - ANSWER Inflammation of the pulp 21.A minimal depth restoration - ANSWER extends about 0.5mm- 1.5mm into dentin ate depth - ANSWER 1mm into dentin, but more than 0.5mm from the pulp 23.Near pulpal exposure - ANSWER less than 0.5mm away from the pulp is the criteria for a cavity varnish - ANSWER used to protect the pulp from being adversely affected by materials l bond strength for glass ionomer is greater than of zinc phosphate - ANSWER true 26.Silver - ANSWER 41% - 71% combines easily with mercury r - ANSWER lower copper; less than 9% high copper; 12-30%. Decrease expansion ( creep) less marginal breakdown 28.Tin - ANSWER 15-30% aids in combining the mercury with the alloy - ANSWER 0-1% prevents oxidation during the manufacturing process reduces brittleness nation of tin and mercury result in - ANSWER gamma 2 phase, which leads to increase in flow and corrosion and a decrease in strength that predisposes the restoration to fracture is creep - ANSWER creep is the slow change inn dimensions of the amaglam due to prolonged exposure to stress happens when amalgam get contaminated with moisture - ANSWER bubbles of hydrogen from the water cause excessive delayed expansion 33.Etching a caity preparation for a class II composite ? - ANSWER enamel for 15 seconds, dentin for another 15 seconds, total time of 30 seconds. clamp would you choose to give you access to a facial class V on #25 - ANSWER #212 which build reparative ( secondary) dentin are called - ANSWER Odontoblast is the enamel thinnest - ANSWER at the CEJ l is the hardest body issue and very brittle it is composed of - ANSWER 95.5% inorganic, 0.5 organic and 4% water