旋入扭矩值与共振频率分析对种植体初期稳定性的相关性研究

Abstract

Abstract: Objective To determine the primary stability measured by peak insertion torque value (ITV) and resonance frequency analysis (RFA) and to investigate the correlation between ITV and RFA value and the related influential variables. Methods Four hundred and forty-nine dental implants were placed into 225 patients. Peak ITV was recorded during surgery, and then implant stability quotient (ISQ) values were measured using wireless RFA. The implants were grouped according to 6 independent variables including age, sex, bone quality, surgical area, length and diameter of implants. Statistical analyses were performed with the SPSS software. Results Generally, a weak positive correlation was observed between ITV and RFA values (r=0.217, P<0.01), while in the case of poor bone quality, the correlation between the two indexes was relatively high. No statically differences in terms of age, sex, implant length were found for RFA and ITV. A higher level of statistical significance was found for ITV (P<0.01) when grouping implants by bone quality, while good ISQ values showed in most cases, especially in posterior sector of mandible. The mean ISQ value of 3.5 mm diameter group was statistically significant smaller than that of 4.3 and 5.0 mm group. The mandibular group had significantly higher mean ISQ and ITV values than the maxillary group, but significant difference was observed between the anterior and posterior sector only in RFA values. Conclusion ITV and RFA value can be taken as two independent features of primary stability. However, in the case of poor bone quality, ITV can partly reflect the RFA value. Under the same conditions of surgery method and implant body, ITV is only strongly correlated with the bone quality, while both diameter and bone quality seem to pose a positive effect on the measured ISQ to some extent. Implants in the posterior sector of the mandible tend to obtain better primary stability no matter in anti rotation or axial stability.

Key words: Primary stability, insertion torque, resonance frequency analysis, correlation, influencing variables

CLC Number:

R782.1

Liu Dong. A correlation study of implant primary stability determination by means of insertion torque and resonance frequency analysis[J]. , 2020, 40(5): 426-431.

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A correlation study of implant primary stability determination by means of insertion torque and resonance frequency analysis

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