双螺纹设计对种植体稳定性的影响 (pdf)

    【摘要】 目的 通过共振频率分析仪和组织病理形态学来比较分析双梯形螺纹种植体和经典的“V”型螺纹种植体对种植体的初期稳定性及功能性负荷下后期稳定性的影响。方法 选择杂种狗12只，拔除下颌前磨牙，3个月后植入种植体，再经3个月愈合后行修复治疗，负重3个月后处死。在植入、修复、负重1个月、负重2个月及处死时分别应用共振频率分析测量种植体的稳定性。处死后取标本制成非脱矿磨片进行组织形态学分析。结果 两组种植体在各时期的稳定度差异均无显著性，但在每一时期实验组种植体的稳定度均较对照组高，实验组种植体在负重后稳定度恢复较快，负重3个月后实验组的骨-种植体接触率(BIC)和种植体周围骨面积(BA)均较对照组稍高，但两者差异无显著性。结论 双梯形螺纹种植体有利于保证种植体的初期和后期稳定性，应用于低密度骨质优越性会更加明显。

    【关键词】 种植体；螺纹；稳定性

    The effect of dual threads design on stability of implants

    ZHANG Yan,DENG Yue,ZHAO Jun.Department of Stomalology,Maternal and Children Healthy Hospital,Chengdu 610031,China

    【Abstract】 Objective The aim was to study the effect of dual thread implants upon stability by comparing single traditional thread implants. Methods A total of 24 fixtures (12 dual threads and 12 single thread implants) were placed into edentulous mandible of 12 mongrel dogs， and animals were sacrificed for histomorphometry after loaded 3 months. Stability of implants was measured by RFA regularly.Results There was no significant difference between both groups about stability at all periods and histomorphometry ......