Harun Nor Asilah, Santini Ario, Roebuck Elizabeth M
Prim Dent J. 2014 May;3(2):26-31. doi: 10.1308/205016814812144030.
Curing of resin-based composites depends on the delivery of adequate total energy, which may be operator dependent. Aim To determine the effect of interincisal opening, cavity location and operator experience on the total energy delivered to simulated cavity preparation sites.
Three cohorts were included: junior dental nurses, senior dental nurses and qualified dentists (N=5, each cohort). Each operator (participant) followed the same procedure and light-cured two simulated restorations in a MARC patient simulator using a Demi light-curing unit for 20 seconds in each of the following situations: left upper second molar (UL7), interincisal opening at both 25 mm and 45 mm; upper central incisor (UR1), interincisal opening at 45mm. The light energy delivered by each operator in each situation was recorded. Five readings for each operator were taken at each interincisal distance. Statistical comparisons of delivered energy (J/cm2) between interincisal openings, location and groups in the total energy delivered were performed using the Kruskal-Wallis nonparametric test: alpha = 0.05.
Less total energy was delivered to the posterior cavity at 25mm (12.0 +/- 5.3 J/cm2) than at 45mm (16.9 +/- 5.6 J/cm2) by all operators (P < 0.05). At 45 mm, less total energy was delivered to the posterior cavity compared to the anterior cavity (25.1 +/- 7.4 J/cm2; P < 0.05). There was no statistically significant difference between junior nurses and qualified dentists (P > 0.05) but there was a significant difference in the total energy delivered between senior nurses (20.1 +/- 7.8 J/cm2) and junior nurses (17.5 +/- 7.6 J/cm2) and between senior nurses and qualified dentists (16.6 +/- 8.7 J/cm2) (P < 0.05).
Interincisal mouth opening, location of the cavity and operator experience affected the total energy delivered to cavities in a simulated clinical environment.
树脂基复合材料的固化取决于充足总能量的传递，而这可能取决于操作人员。目的：确定切牙间开口、窝洞位置和操作人员经验对传递至模拟窝洞制备部位的总能量的影响。
纳入三个队列：初级牙科护士、高级牙科护士和合格牙医（每组N = 5）。每位操作人员（参与者）遵循相同程序，使用Demi光固化装置在MARC患者模拟器中对两个模拟修复体进行光固化，在以下每种情况下各固化20秒：左上第二磨牙（UL7），切牙间开口为25 mm和45 mm；上中切牙（UR1），切牙间开口为45 mm。记录每位操作人员在每种情况下传递的光能。在每个切牙间距离对每位操作人员进行五次读数。使用Kruskal-Wallis非参数检验对切牙间开口、位置和组间传递的总能量（J/cm²）进行统计学比较：α = 0.05。
所有操作人员在25 mm时传递至后牙窝洞的总能量（12.0 +/- 5.3 J/cm²）低于45 mm时（16.9 +/- 5.6 J/cm²）（P < 0.05）。在45 mm时，与前牙窝洞相比，传递至后牙窝洞的总能量较少（25.1 +/- 7.4 J/cm²；P < 0.05）。初级护士和合格牙医之间无统计学显著差异（P > 0.05），但高级护士（20.1 +/- 7.8 J/cm²）与初级护士（17.5 +/- 7.6 J/cm²）以及高级护士与合格牙医（16.6 +/- 8.7 J/cm²）之间传递的总能量存在显著差异（P < 0.05）。
切牙间开口、窝洞位置和操作人员经验会影响在模拟临床环境中传递至窝洞的总能量。
