Suzuki Eduardo Yugo, Suzuki Boonsiva, Aramrattana Atchara, Harnsiriwattanakit Kanchana, Kowanich Narumanas
Department of Orthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
J Oral Maxillofac Surg. 2010 Nov;68(11):2682-9. doi: 10.1016/j.joms.2010.05.083.
Resonance frequency analysis (RFA) is a reliable, noninvasive method of measuring dental implant stability in vivo. However, the possibility of using this method to assess the stability of miniscrew implant has not been investigated. The purpose of this study was to evaluate the possibility of using RFA to assess the stability of miniscrew implants placed in different sites in the maxillae and mandibles of cadavers.
Ten pairs of dentate maxillas and mandibles were retrieved from human cadavers. Two hundred self-drilling miniscrew implants of 1.5-mm diameter and 8-mm length were systematically inserted into the dentoalveolar bones aided by a 3-dimensional surgical guide. Maximum insertion torque value was recorded during implantation procedures. Assessment of primary stability was carried out immediately after implantation using the RFA method, and implant stability quotient (ISQ) values were recorded. Analysis of variance, the Student t test, and generalized estimating equation regression analyses were used to analyze the data.
A strong correlation was found between maximum insertion torque and ISQ values (r = 0.873). Maximum insertion torque and ISQ values were significantly higher in the mandible (15.8 ± 3.3 N-cm and 71.7 ± 12.1) than in the maxilla (11.8 ± 3.8 N-cm and 56.0 ± 15.8). Miniscrews inserted in the posterior region of the maxilla exhibited the lowest ISQ values. No significant difference among ISQ values of miniscrews inserted in the anterior, middle, or posterior regions of the mandible was observed.
Estimates of implant stability using resonance frequency analysis are highly correlated with maximum insertion torque. Further studies to assess the primary stability of miniscrew implants in the clinical situation are necessary.
共振频率分析（RFA）是一种在体内测量牙种植体稳定性的可靠、非侵入性方法。然而，尚未研究使用该方法评估微螺钉种植体稳定性的可能性。本研究的目的是评估使用RFA评估放置在尸体上颌骨和下颌骨不同部位的微螺钉种植体稳定性的可能性。
从人类尸体中获取10对有牙的上颌骨和下颌骨。在三维手术导板辅助下，将200枚直径1.5mm、长度8mm的自攻微螺钉种植体系统地植入牙槽骨。在植入过程中记录最大插入扭矩值。植入后立即使用RFA方法评估初始稳定性，并记录种植体稳定性商（ISQ）值。采用方差分析、Student t检验和广义估计方程回归分析对数据进行分析。
最大插入扭矩与ISQ值之间存在强相关性（r = 0.873）。下颌骨的最大插入扭矩和ISQ值（15.8±3.3 N-cm和71.7±12.1）显著高于上颌骨（11.8±3.8 N-cm和56.0±15.8）。在上颌骨后部插入的微螺钉表现出最低的ISQ值。在下颌骨前部、中部或后部插入的微螺钉的ISQ值之间未观察到显著差异。
使用共振频率分析评估种植体稳定性与最大插入扭矩高度相关。有必要进一步研究评估微螺钉种植体在临床情况下的初始稳定性。
