密度不同的颌骨内单个种植体稳定性的测量观察

Stability of implants placed in different bone types

目的探讨颌骨不同密度单个种植体稳定性的变化规律,为早期负载提供依据。方法50例牙列缺损患者,共植入104枚 ITI 大颗粒酸蚀喷砂表面处理种植体,按种植区骨密度进行分组。在术中、术后1、4、6、8、12周进行共振频率分析,记录种植稳定值。结果骨密度对种植体初期稳定性有显著的影响(P<0.001),Ⅰ类骨初期稳定性明显高于Ⅳ类骨,12周各组稳定性的差异无统计学意义。6周和12周稳定性比较,Ⅰ类骨和Ⅱ、Ⅲ类骨比较,差异无统计学意义(P>0.05),与Ⅳ类骨比较,差异有统计学意义(P<0.001)。结论Ⅰ、Ⅲ类骨种植体早期负载具有可行性。

Objective To determine ITI implants stability in different bone types using RFA and to provide evidence for feasibility of early loading. Methods A total of 104 ITI sand-blasted large-grit acidetched（SLA） implants in 50 patients were classified into 3 groups according to bone type. Resonance frequency analysis was conducted at 0,1,4,6,8 and 12 weeks after installation. Results The survival rate was 100%. Primary stability was affected by bone type （P 〈 0. 001 ）. The implant stability quotieat （ISQ） was significantly higher in type Ⅰ bone than in type Ⅳ bone. At 12 weeks, there was no significant difference among the 3 groups. Comparison of ISQ was made between 6 th week and 12 th week for all bone types, there was no significant difference for type Ⅰ and Ⅲ（P 〉 0. 05） while there was for type Ⅳ （P 〈 0. 001 ）. Conclusions Early loading with ITI SLA implants placed in type Ⅰ , Ⅲ bone were highly predictable.