Khalaila Waseem, Nasser Minaem, Ormianer Zeev
Graduate student, Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
Senior Lecturer, Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
J Prosthet Dent. 2020 Aug;124(2):183-188. doi: 10.1016/j.prosdent.2019.08.023. Epub 2019 Nov 25.
Although the Periotest has been shown to provide reliable information about initial implant stability, whether Periotest values (PTVs) can be correlated with the stability of implants in function for several years is unclear.
The purpose of this prospective clinical study was to investigate implant stability by using PTVs, as well as changes in stability and peri-implant marginal bone levels (as measured by radiographs) over a 3-year follow-up period. The exploratory hypothesis was that there is a significant correlation between PTVs and bone loss around the implant and that PTVs can provide predictive information about marginal bone-level changes and implant stability over time.
The study population included patients who needed single-tooth replacement with restoration of cemented fixed partial dentures. Clinical data, PTVs, and periapical radiographs were collected at the time points of implant placement, 3 to 6 months after insertion, and 1 year, 2 years, and 3 years after the final definitive prosthetic restoration. Pearson correlation coefficient tests were performed to estimate the correlation between the PTVs received at the first follow-up time point and the subsequent PTVs received during the follow-up period (up to 3 years after the restoration). The Pearson test was applied, as well as the t test and repeated-measures ANOVA, to evaluate PTVs and bone loss changes over time. The Pearson test was also applied to estimate the correlation between the bone loss values measured at the first follow-up visit and the subsequent bone loss values at the annual follow-up time points (up to and including 3 years after the restoration).
A total of 43 implants were inserted in 34 patients (26 men and 8 women); the average patient age was 52.8 years. A significant reduction in implant stability was detected between implant insertion and the 3- to 6-month follow-up time point, which was then followed by a significant increase in stability at the 1-year follow-up time point and then stabilized during the 2- and 3-year follow-up time points (P<.014). Furthermore, a significant correlation was found between PTVs at the 1-year follow-up and the PTVs at all measured follow-up time points (P<.05). A positive correlation was obtained with high-strength correlation coefficient R (R>0.7) at all follow-up time points. Bone loss changes during the follow-up time points were significantly different and correlated with PTVs (P<.001).
The Periotest is a reliable device for assessing implant stability and providing predictive information about marginal bone level changes around an implant.
尽管Periotest已被证明能提供有关种植体初始稳定性的可靠信息，但尚不清楚Periotest值（PTV）是否能与种植体多年功能期的稳定性相关联。
这项前瞻性临床研究的目的是通过使用PTV评估种植体稳定性，以及在3年随访期内观察稳定性变化和种植体周围边缘骨水平变化（通过X线片测量）。探索性假设是PTV与种植体周围骨丢失之间存在显著相关性，并且PTV可以提供有关边缘骨水平随时间变化以及种植体稳定性的预测信息。
研究人群包括需要单颗牙置换并采用粘结固定局部义齿修复的患者。在种植体植入时、植入后3至6个月、最终确定性修复后1年、2年和3年这些时间点收集临床数据、PTV和根尖X线片。进行Pearson相关系数检验，以估计首次随访时间点测得的PTV与随访期内（修复后长达3年）后续测得的PTV之间的相关性。应用Pearson检验以及t检验和重复测量方差分析，以评估PTV和骨丢失随时间的变化。还应用Pearson检验来估计首次随访时测得的骨丢失值与年度随访时间点（修复后长达3年，包括3年）后续的骨丢失值之间的相关性。
34例患者（26例男性和8例女性）共植入43颗种植体；患者平均年龄为52.8岁。在种植体植入与3至6个月随访时间点之间检测到种植体稳定性显著降低，随后在1年随访时间点稳定性显著增加，然后在2年和3年随访时间点保持稳定（P<0.014）。此外，在1年随访时的PTV与所有测量随访时间点的PTV之间发现显著相关性（P<0.05）。在所有随访时间点均获得了高强度相关系数R（R>0.7）的正相关。随访时间点期间的骨丢失变化显著不同，且与PTV相关（P<0.001）。
Periotest是一种用于评估种植体稳定性并提供有关种植体周围边缘骨水平变化的预测信息的可靠设备。
