| 复合树脂预热对修复体边缘微渗漏的影响 |
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| 引用本文： | 汪信洋,刘卫红.复合树脂预热对修复体边缘微渗漏的影响[J].口腔医学,2009,29(4):196-198. |
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| 作者姓名： | 汪信洋 刘卫红 |
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| 作者单位： | 南京医科大学口腔医学研究所,南京医科大学附属口腔医学院牙体牙髓科,南京,210029 |
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| 摘 要： | 目的观察预热树脂和室温树脂充填Ⅱ类洞的龈壁边缘微渗漏的情况。方法20个新鲜离体恒磨牙备近中面Ⅱ类洞,充填光固化后牙树脂P60,充填树脂分2组:电热恒温箱预热树脂至45℃和16℃室温下直接充填树脂。充填后标本经温度循环、品红染色、近远中向连续切片,在体视显微镜下观察染料渗透情况。结果预热树脂组Ⅱ类洞龈壁微渗漏明显小于室温树脂组(P<0.05)。结论应用预热树脂充填可减小Ⅱ类洞龈壁牙骨质-牙本质边缘微渗漏。
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| 关 键 词： | 复合树脂 Ⅱ类洞 龈壁微渗漏 温度 |
Effects of preheated composites on marginal microleakage of composite restorations |
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| WANG Xin-yang,LIU Wei-hong.Effects of preheated composites on marginal microleakage of composite restorations[J].Stomatology,2009,29(4):196-198. |
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| Authors: | WANG Xin-yang LIU Wei-hong |
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| Institution: | . ( The Research Institute of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology , Nanjing Medical University, Nanjing 210029, China ) |
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| Abstract: | Objective To evaluate gingival microleakage of class Ⅱ composite restorations using preheated composites and room-temperature composites. Methods Class Ⅲ slot cavity was prepared on mesial surface in each of 20 freshly extracted human molars. Teeth were randomly divided into 2 groups and were filled with packable resin composite（P60） which was preheated to 45 ℃ in constant temperature cabinet and was unpreheated at morn temperature（ 16 ℃ ） respectively. After thermocycling, all teeth were immersed in basic fuchsine solution. Each sample was then sectioned longitudinally into 3 pieces in a mesio-distal direction. Dye penetrations were examined under stereomicroscope. Resuits The preheated samples showed significantly lower gingival microleakage than the unpreheated ones （ P 〈 0.05）. Conclusion It could be concluded that preheated composites reduce gingival microleakage of class Ⅱ cavities with cementum/dentin margins. |
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| Keywords: | composite resins class Ⅱ gingival microleakage temperature |
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