排龈技术在固定修复中的联合应用

Application of gingival retraction technique in fixed prosthodontics

目的:研究固定修复中龈下牙体预备时,如何保护龈沟底上皮附着,采集准确印模,确保牙周的生物学宽度不受侵犯。方法:对86例患者242颗牙行冠桥修复时,于备牙术中排龈线排龈及龈挡保护周围组织,术后排龈膏排龈。结果:排龈及止血效果良好,肩台与龈沟处印模清晰程度均取得良好的结果。结论:排龈技术的合理应用,避免了牙体预备时对牙龈组织的损伤及出血,能迅速打开龈沟,并且牙龈收缩是完全可逆的过程。

Objective： To study how to protect epithelial attachment and biological width during subgingival tooth preparation in fixed restoration, and achieve precise impression. Methods： 262 teeth in 86 cases were restored with fixed bridges, gingival retraction cord was used to retract the gingiva and gingiva block was used to protect peripheral tissue during tooth preparation, gingival retraction paste was used to retract the gingiva after preparation. Results： The effect of gingival retraction and hemostasia, the clearness of impression around gingival margin and gingival sulcus were both improved. Conclusion： Reasonable application of gingival retraction technique can not only prevent damage to gingival tissue and hemostasia caused by tooth preparation but also make the gingival sulcus open quickly, and besides, gingival retraction is completely reversible.