DASLE MN Questions and Answers Rated A+

What system has a tightening wrench to tighten and loosen the band? Automatrix What is the purpose of a wedge? How many do you need for an MOD restoration? To contour and hold the band securely, 2 wedges auto matrix is unique in that it has a wrench that does what? has no retainer to hold the band in place. the tightening wrench is inserted into the coil and is turned clockwise to tighten the band What occurs if the wedge is not place properly? Overhang or cupping Class III & IV composites use what type of matrix system? Celluloid strip "Mylar" wedges function is to? insert into the lingual embrasure to hold the band firmly against the gingival margin of the posterior restoration, where is the wedge inserted? inserted on the lingual side what is used to insert the wedge? 110 howe pliers The universal band when placed should extend _____ mm above the ________ surface? 1 ½ to 2 mm above the occlusal surface what is T-band made from? stainless steel or copper what is the universal retainer (tofflemire retainer) a mechanical device that holds the matrix band snugly in position. it's designed for class II amalgam restoration and intermediate. It's positioned from the buccal surface of the tooth being restored Explain the rule for posterior teeth isolation. Isolate 1 to 2 teeth distal to the tooth being treated (working tooth), and isolate 3 to 4 teeth mesial or 6 to 8 teeth for better stability Explain the rule for anterior teeth isolation. What is the exception to the rule? Isolate canine to canine, clamp may not be needed, ligate between canine and 1st premolar Anterior/cervical clamp may be used for Class V, en