[摘要]目的：总结、探讨硅橡胶印模法在固定义齿修复应用中的技法及临床注意事项，为临床工作提供参考。方法：常规备牙后，选择合适托盘或个别托盘，将硅橡胶粗泥按比例混合后置入托盘，上覆塑料薄膜后取模而作为一次阴模，去除阴模牙齿龈向倒凹，再将细泥硅橡胶注入一次阴模后取模，获取二次阴模，灌注石膏阳模。结果：可见全部病例的牙齿不论是阴模还是阳模，其组织面均平整细腻、颈缘线清晰连续、无气泡，制作出的基底冠颈缘与阳模肩台及口内基牙肩台均精密贴合。结论：应用硅橡胶制取1次、2次阴模的精确度高，利于所制作的义齿与肩台精密贴合，提高了义齿的精密度，增强了义齿颈缘区域牙周组织的健康。

    [关键词]硅橡胶；印模；固定义齿

    [中图分类号]R783 [文献标识码]A [文章编号]1008-6455(2009)03-0367-02

    The use of affinis perfect impressions in fixed partial denture

    LONG Hong-yue，WANG Xian-fen，SONG Guang-bao

    (Guangdong Provincial Stomatological Hospital，Affiliated Hospital of Southern Medical University Department of Prosthodontics，Guangzhou 510280，Guangdong，China)

    Abstract: Objectives The purpose of this study was to discuss and summarize the use of silicon rubber impression technique in fixed partial denture. Try to find a practical guide for clinical practice. Methods After tooth preparation, appropriate tray and custom made tray was prepared for the impression. Heavy-body silicon rubber impression material was mixed according to manufacturer's manual and was then put into the prepared tray. Before the impression taking, a plastic film was put to the tray to cover the impression material. After the preparation of the primary impression, all gingival undercuts in the impression were removed followed by pouring the light-body silicon rubber impression material to take the final impression. Results Among all the cases, exquisite tissue surface and clear marginal line were revealed in female and male dies. Perfect marginal fit was also shown between base crowns and shoulders in die and abutment teeth. Conclusion The use of the silicon rubber impression material can get high precision primary and final impression. It could provide better marginal fit, more precise fixed partial denture and better health status of marginal periodontal tissue. ......