光尖距离对经高强度卤素灯、发光二极管和等离子弧光固化的树脂改性玻璃离子水门汀剪切粘结强度的影响。
Effect of light-tip distance on the shear bond strengths of resin-modified glass ionomer cured with high-intensity halogen, light-emitting diode, and plasma arc lights.
作者信息
Sfondrini Maria Francesca, Cacciafesta Vittorio, Scribante Andrea, Boehme Andreas, Jost-Brinkmann Paul-Georg
机构信息
Department of Orthodontics, University of Pavia, Pavia, Italy.
出版信息
Am J Orthod Dentofacial Orthop. 2006 Apr;129(4):541-6. doi: 10.1016/j.ajodo.2005.12.025.
INTRODUCTION
The purpose of this study was to assess the effect of light-tip distance on the shear bond strength and the failure site of brackets cured with 3 light-curing units (high-intensity halogen, light-emitting diode, and plasma arc).
METHODS
One hundred thirty-five bovine mandibular permanent incisors were randomly allocated to 9 groups of 15 specimens each. Stainless steel brackets (Victory Series, Unitek/3M, Monrovia, Calif) were bonded with a resin-modified glass-ionomer (Fuji Ortho LC, GC Europe, Leuven, Belgium) to the teeth, and each curing light was tested at 3 distances from the bracket: 0, 3, and 6 mm. After bonding, all samples were stored in distilled water at room temperature for 24 hours and subsequently tested for shear bond strength.
RESULTS
When the 3 light-curing units were compared at a light-tip distance of 0mm, they showed no significantly different shear bond strengths. At a light-tip distance of 3 mm, no significant differences were found between the halogen and plasma arc lights, but both lights showed significantly higher shear bond strengths than the light-emitting diode light. At a light-tip distance of 6 mm, no significant differences were found between the halogen and light-emitting diode lights, but both showed significantly lower bond strengths than the plasma arc light. When the effect of the light-tip distance on each light-curing unit was evaluated, the halogen and light-emitting diode lights showed no significant differences among the 3 distances. However, the plasma arc light produced significantly higher shear bond strengths at a greater light-tip distance. No significant differences were found among the adhesive remnant index scores of the various groups, except with the LED light at a distance of 3 mm.
CONCLUSIONS
In hard-to-reach areas, the plasma arc curing light is suggested for optimal curing efficiency.
引言
本研究的目的是评估光尖端距离对使用三种光固化设备（高强度卤素灯、发光二极管和等离子弧灯）固化的托槽剪切粘结强度和失效部位的影响。
方法
135颗牛下颌恒切牙随机分为9组，每组15个样本。使用树脂改性玻璃离子水门汀（Fuji Ortho LC，GC Europe，鲁汶，比利时）将不锈钢托槽（Victory Series，Unitek/3M，蒙罗维亚，加利福尼亚）粘结到牙齿上，并在距托槽3个距离处测试每种固化灯：0、3和6毫米。粘结后，所有样本在室温下的蒸馏水中储存24小时，随后测试剪切粘结强度。
结果
当在光尖端距离为0毫米时比较这三种光固化设备，它们的剪切粘结强度没有显著差异。在光尖端距离为3毫米时，卤素灯和等离子弧灯之间没有发现显著差异，但这两种灯的剪切粘结强度均显著高于发光二极管灯。在光尖端距离为6毫米时，卤素灯和发光二极管灯之间没有发现显著差异，但两者的粘结强度均显著低于等离子弧灯。当评估光尖端距离对每种光固化设备的影响时，卤素灯和发光二极管灯在这3个距离之间没有显著差异。然而，等离子弧灯在更大的光尖端距离下产生了显著更高的剪切粘结强度。除了距离为3毫米的发光二极管灯组外，各实验组的粘结剂残留指数评分之间没有显著差异。
结论
在难以触及的区域，建议使用等离子弧固化灯以实现最佳固化效率。
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