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Effectiveness and Efficiency

2012; Linguagem: Inglês

10.1007/springerreference_75656

Jeanette Rohr, Bram Verschuere, Alexia Duten, Benedikt Krollpfeifer, Alex Murdock, Renée A. Irvin, Martin Hölz, Charlotte Anheier, Norman Spengler, Jana Brunke, Anne Sander, Zeynep Atalay, Pauric O’Rourke, Christopher S. Biggers, Raquel Campos Franco, Lehn M. Benjamin, Gordon Shockley,

The aims of this in vitro study were both to determine the time necessary for removal of carious dentin (efficiency) and the Knoop Hardness Number (KHN) of the remaining dentin (effectiveness), using a chemomechanical method (Carisolv) or hand excavation.Thirty human molars were bisected through occlusal carious lesions into two equal halves.Each half was randomly excavated by hand in circular movements with a spoon excavator or using Carisolv gel according to the manufacturer's instructions.The duration of carious dentin removal was recorded.Tooth sections were resin-embedded, ground flat and polished.Dentin KHN was determined at distances of 100, 200, 300, 400 and 500 μm from the cavity floor.Data were analyzed by Wilcoxon's test (α=0.01),ANOVA and Student's t test (α= 0.05).The median of the time necessary for chemomechanical excavation was significantly greater than for hand excavation.KHN means (± SD) at 100, 200, 300, 400, 500 μm for chemomechanical method were, respectively: 15.6 (±4.96), 18.0 (±6.22), 21.3 (±9.30), 24.3 (±9.25), 28.5 (±11.80); and for hand excavation were: 21.2 (±10.26),23.4 (±9.49), 28.2 (±11.62),31.0 (±12.17),34.3 (±11.95).It may be concluded that hand excavation presented higher efficiency and effectiveness than chemomechanical excavation.