OPER 8122 Study Guide - Midterm Guide: Pear-Shaped, Abrasive, Dental Composite
3 Jan 2020
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Range from #"s 555-561 (all whole #"s) Range from #"s 55-61 (all whole #"s) Third number (#555) means bur is the same size as #55, but it is crosscut. Do not cut well on the end (end is flat) Will not deepen pulpal wall on class i occlusal cavity. Only straight fissure bur we have in sim clinic is #57. For cast gold cavity preps; certain areas for retention placement. Only tapered fissure bur in our tray is 170l bur. Both straight fissure and tapered fissure have flat ends. 33 , 34, 34 , 35, 36, 37, 38, 39. Class v cavity preps; sometimes retention placement. Only inverted cone bur we have is #34. Basically inverted cone burs w/ rounded ends. #"s 329-333 (all whole #"s) and 245. 245 bur is basically an elongated 330 bur. Some of most versatile burs for performing amalgam & composite resin preps. At cod, we have 245 and 330 bur.
