Abstract:

Composite resins are widely used as clinical restoration materials because of good aesthetic properties，easy handling，thermal insulation and better conservation of tooth structures. However，its polymerization shrinkage can lead to the gap between the tooth structure and composite resin called microleakage，which can result in the failure of restorations. Cervical lesions usually have little enamel in ClassⅤ cavities，so it’s more difficult to avoid the microleakage. Microleakage is a complicated process caused by various factors and there are many studies about it reported. Based on literature reviews，this paper summarized the influence factors of microleakage in ClassⅤ composite restorations，hoping to offer some reference and help in clinical treatment.

Key words: composite resin, classⅤ cavities, microleakage, influencing factor

摘要：

复合树脂材料凭借良好的美学效果，操作简便，对温度具有绝缘性，且能最大程度保留健康牙体组织等优点而被广泛应用于牙体缺损的修复。但因其固化时会发生聚合收缩，使复合树脂与牙体之间形成数微米的边缘裂缝，即边缘微渗漏，从而导致充填修复失败。由于牙颈部缺损的Ⅴ类洞在龈缘处的釉质较少，边缘微渗漏更易发生。微渗漏是一种多因素共同作用的复杂过程，相关研究报道也很多。本文通过复习相关文献，就影响复合树脂充填Ⅴ类洞后微渗漏的多种因素作一综述，以期为临床实践提供参考和帮助。

关键词: 复合树脂, Ⅴ类洞, 边缘微渗漏, 影响因素