Abstract：
OBJECTIVE: To evaluate the 3- to 8-year outcomes of dental implants placed with lateral sinus floor augmentation (LSFA) and to identify factors affecting implant survival.
METHODS: This retrospective study was performed by screening all implants placed with LSFA procedures, which were conducted between January 2012 and December 2016. Subantral bone gain (SABG) and apical bone height (ABH) were assessed using panoramic radiographs. The cumulative survival rate of implants was analysed using life-table analysis and Kaplan-Meier survival curves. The influential risk factors affecting survival were assessed using univariate log-rank tests and multivariable mixture cure rate model. Implant complications were recorded.
RESULTS: Based on the established criteria, a total of 449 patients (760 implants) were included in this study. In the 3- to 8-year follow-up (mean ± SD, 5.81 ± 1.33 years), 15 implants in 14 patients failed, with a CRS of 96.81% on an implant basis and 95.07% on a patient basis. A history of periodontitis and poor compliance with supportive periodontal treatment was associated with a significantly higher risk of implant failure at both implant and patient levels. Significant decreases in ABH occurred during each yearly interval except for 3 years. A similar trend has been observed for SABG at 1, 2, 6 and 8 years. The total complication rate was 31.84% on implant basis, with peri-implant mucositis (21.58%) being the most frequent biologic complication and porcelain cracking (5.00%) being the most common technical complication.
CONCLUSIONS: Implant with LSFA is a reliable treatment option in atrophic maxilla. A history of periodontitis without regular supportive periodontal treatment was identified as a predictor for implant failure. Slight but significant shrinkage of vertically augmented bone can be observed after implant placement.
METHODS: This retrospective study was performed by screening all implants placed with LSFA procedures, which were conducted between January 2012 and December 2016. Subantral bone gain (SABG) and apical bone height (ABH) were assessed using panoramic radiographs. The cumulative survival rate of implants was analysed using life-table analysis and Kaplan-Meier survival curves. The influential risk factors affecting survival were assessed using univariate log-rank tests and multivariable mixture cure rate model. Implant complications were recorded.
RESULTS: Based on the established criteria, a total of 449 patients (760 implants) were included in this study. In the 3- to 8-year follow-up (mean ± SD, 5.81 ± 1.33 years), 15 implants in 14 patients failed, with a CRS of 96.81% on an implant basis and 95.07% on a patient basis. A history of periodontitis and poor compliance with supportive periodontal treatment was associated with a significantly higher risk of implant failure at both implant and patient levels. Significant decreases in ABH occurred during each yearly interval except for 3 years. A similar trend has been observed for SABG at 1, 2, 6 and 8 years. The total complication rate was 31.84% on implant basis, with peri-implant mucositis (21.58%) being the most frequent biologic complication and porcelain cracking (5.00%) being the most common technical complication.
CONCLUSIONS: Implant with LSFA is a reliable treatment option in atrophic maxilla. A history of periodontitis without regular supportive periodontal treatment was identified as a predictor for implant failure. Slight but significant shrinkage of vertically augmented bone can be observed after implant placement.
摘要：
目的：评估植入侧窦底增强术（LSFA）的3至8年的结果，并确定影响种植体存活的因素。
方法：这项回顾性研究是通过筛选所有使用LSFA程序放置的植入物来进行的，在2012年1月至2016年12月期间进行。使用全景X射线照片评估了下骨量（SABG）和根尖骨高度（ABH）。使用寿命表分析和Kaplan-Meier存活曲线分析植入物的累积存活率。采用单变量对数秩检验和多变量混合治愈率模型评估影响生存的危险因素。记录种植并发症。
结果：根据既定标准，本研究共纳入449例患者(760个植入物).在3至8年的随访中(平均值±SD，5.81±1.33年)，14名患者的15个植入物失败，基于植入物的CRS为96.81%，基于患者的CRS为95.07%。牙周炎病史和对牙周支持性治疗的依从性差与植入物和患者水平的植入物失败风险均显着增加相关。ABH在除3年以外的每个年度间隔期间发生显著下降。SABG在1、2、6和8年观察到类似的趋势。基于植入物的总并发症发生率为31.84％，种植体周围黏膜炎（21.58％）是最常见的生物并发症，瓷裂（5.00％）是最常见的技术并发症。
结论：用LSFA植入是萎缩性上颌骨的可靠治疗选择。没有定期支持牙周治疗的牙周炎病史被确定为植入物失败的预测因素。植入物放置后，可以观察到垂直增强骨的轻微但明显的收缩。
方法：这项回顾性研究是通过筛选所有使用LSFA程序放置的植入物来进行的，在2012年1月至2016年12月期间进行。使用全景X射线照片评估了下骨量（SABG）和根尖骨高度（ABH）。使用寿命表分析和Kaplan-Meier存活曲线分析植入物的累积存活率。采用单变量对数秩检验和多变量混合治愈率模型评估影响生存的危险因素。记录种植并发症。
结果：根据既定标准，本研究共纳入449例患者(760个植入物).在3至8年的随访中(平均值±SD，5.81±1.33年)，14名患者的15个植入物失败，基于植入物的CRS为96.81%，基于患者的CRS为95.07%。牙周炎病史和对牙周支持性治疗的依从性差与植入物和患者水平的植入物失败风险均显着增加相关。ABH在除3年以外的每个年度间隔期间发生显著下降。SABG在1、2、6和8年观察到类似的趋势。基于植入物的总并发症发生率为31.84％，种植体周围黏膜炎（21.58％）是最常见的生物并发症，瓷裂（5.00％）是最常见的技术并发症。
结论：用LSFA植入是萎缩性上颌骨的可靠治疗选择。没有定期支持牙周治疗的牙周炎病史被确定为植入物失败的预测因素。植入物放置后，可以观察到垂直增强骨的轻微但明显的收缩。
