【摘要翻译】】【Am J Orthod Dentofacial Orthop 】使用最新一代发光二极管对缩短聚合时间的效果
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【英文文题】Effect of shorter polymerization times when using the latest generation of light-emitting diodes
【中文文题】使用最新一代发光二极管对缩短聚合时间的效果
【作者】Y. Teresa Siltaa, William J. Dunnb , Charles B. Petersc
【杂志】Am J Orthod Dentofacial Orthop 2005;128:744-8
【英文摘要】
Introduction: Recent studies have suggested that a 10-second cure time with a high-energy quartz-tungsten-halogen (QTH) or a light-emitting diode (LED) light might be adequate when bonding orthodontic brackets to tooth enamel. The purpose of this study was to evaluate the ability of the latest generation of QTH and LED light-curing units (LCUs) to bond orthodontic brackets to teeth at decreased polymerization times.
Methods: Two LED LCUs (Ortholux LED, 3M Unitek, Monrovia, Calif; UltraLume LED 5, Ultradent Products, South Jordan, Utah) and a QTH LCU (Optilux 501, Demetron, Danbury, Conn) were evaluated. One hundred eighty metal orthodontic brackets were bonded to extracted human molars. The specimens were divided into 9 groups (3 lights and 3 curing times) of 20 teeth each. Each group was cured with 1 of the 3 lights for 20, 10, or 6 seconds. Thirty minutes after polymerization, the specimens were subjected to shear force on a universal testing machine until bracket failure.
Results: Two-way ANOVA detected significant differences among the main effects of light type and cure time. Tukey post-hoc tests determined that brackets bonded by all light types had lower bond strengths with the 6-second cure than the 20-second cure (P < .001). The highest bond strengths were obtained with the Optilux 501 QTH LCU and the UltraLume LED 5 LCU at the longest cure time of 20 seconds.
Conclusions: It is recommended that orthodontic brackets be photopolymerized for at least 20 seconds with the QTH or the LED LCU before the archwires are engaged.
【中文摘要】：
引言：近期的研究建议在牙釉质上粘接正畸托槽时使用高能石英钨卤素灯(QTH)或者发光二极管(LED)10秒的固化时间就足够了。本研究的目的是评价最新一代QTH和LED光固化单位(LCUs)对缩短在牙面上粘接正畸托槽的聚合时间的能力
方法：评价了两种LED光固化单位(Ortholux LED, 3M Unitek, Monrovia, Calif; UltraLume LED 5, Ultradent Products, South Jordan, Utah)和一种QTH光固化单位(Optilux 501, Demetron, Danbury, Conn)。将180个正畸托槽粘接于拔除的人类磨牙上。样本分为9组（3种光源和3种固化时间）每组20颗。每组20颗牙用三种光源中的一种固化20、10或6秒。聚合三十分钟后将样本置于万用实验机上进行剪切力测试，直至托槽脱落。
结果：双因素方差分析显示光源类型和固化时间的主要效果差异显著。Tukey post-hoc检验证明所有光源粘接托槽6秒固化组均比20秒固化组粘接强度低(P<0.001). Optilux 501 QTH LCU and the UltraLume LED 5 LCU在最长的20秒固化时间粘接强度最大。
结论：在使用QTH 或者LED 光固化单位粘接正畸托槽时，建议在上弓丝前至少光聚合20秒。
【中文文题】使用最新一代发光二极管对缩短聚合时间的效果
【作者】Y. Teresa Siltaa, William J. Dunnb , Charles B. Petersc
【杂志】Am J Orthod Dentofacial Orthop 2005;128:744-8
【英文摘要】
Introduction: Recent studies have suggested that a 10-second cure time with a high-energy quartz-tungsten-halogen (QTH) or a light-emitting diode (LED) light might be adequate when bonding orthodontic brackets to tooth enamel. The purpose of this study was to evaluate the ability of the latest generation of QTH and LED light-curing units (LCUs) to bond orthodontic brackets to teeth at decreased polymerization times.
Methods: Two LED LCUs (Ortholux LED, 3M Unitek, Monrovia, Calif; UltraLume LED 5, Ultradent Products, South Jordan, Utah) and a QTH LCU (Optilux 501, Demetron, Danbury, Conn) were evaluated. One hundred eighty metal orthodontic brackets were bonded to extracted human molars. The specimens were divided into 9 groups (3 lights and 3 curing times) of 20 teeth each. Each group was cured with 1 of the 3 lights for 20, 10, or 6 seconds. Thirty minutes after polymerization, the specimens were subjected to shear force on a universal testing machine until bracket failure.
Results: Two-way ANOVA detected significant differences among the main effects of light type and cure time. Tukey post-hoc tests determined that brackets bonded by all light types had lower bond strengths with the 6-second cure than the 20-second cure (P < .001). The highest bond strengths were obtained with the Optilux 501 QTH LCU and the UltraLume LED 5 LCU at the longest cure time of 20 seconds.
Conclusions: It is recommended that orthodontic brackets be photopolymerized for at least 20 seconds with the QTH or the LED LCU before the archwires are engaged.
【中文摘要】：
引言：近期的研究建议在牙釉质上粘接正畸托槽时使用高能石英钨卤素灯(QTH)或者发光二极管(LED)10秒的固化时间就足够了。本研究的目的是评价最新一代QTH和LED光固化单位(LCUs)对缩短在牙面上粘接正畸托槽的聚合时间的能力
方法：评价了两种LED光固化单位(Ortholux LED, 3M Unitek, Monrovia, Calif; UltraLume LED 5, Ultradent Products, South Jordan, Utah)和一种QTH光固化单位(Optilux 501, Demetron, Danbury, Conn)。将180个正畸托槽粘接于拔除的人类磨牙上。样本分为9组（3种光源和3种固化时间）每组20颗。每组20颗牙用三种光源中的一种固化20、10或6秒。聚合三十分钟后将样本置于万用实验机上进行剪切力测试，直至托槽脱落。
结果：双因素方差分析显示光源类型和固化时间的主要效果差异显著。Tukey post-hoc检验证明所有光源粘接托槽6秒固化组均比20秒固化组粘接强度低(P<0.001). Optilux 501 QTH LCU and the UltraLume LED 5 LCU在最长的20秒固化时间粘接强度最大。
结论：在使用QTH 或者LED 光固化单位粘接正畸托槽时，建议在上弓丝前至少光聚合20秒。
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