Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, People's Republic of China.
Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, People's Republic of China.
Int J Implant Dent. 2021 Mar 25;7(1):22. doi: 10.1186/s40729-021-00304-3.
This study analyzed the influence of implant protrusion length (IPL) on the possible factors that affect the long-term outcomes utilizing non-grafting osteotome sinus floor elevation (OSFE) with simultaneous implant placement, and to explore the optimal range of IPL.
A retrospective study design was adopted. The clinical and radiographic data of 105 implants in 65 patients were collected after 3-9 (mean 5.04) years follow-up. IPL was divided into three groups (group1, IPL<2mm; group2, 2mm≤IPL<4mm; group3, IPL≥4mm). Endo-sinus bone gain (ESBG), peri-implant marginal bone loss (MBL), bone to implant contact length (BICL), and percentage of ESBG (%ESBG) were used to evaluate non-grafting OSFE. A Kaplan-Meier analysis was performed to assess the cumulative survival rate. Multiple linear regression model was used to explore the relationship between the possible influence factors and ESBG. Analysis of variance (ANOVA) was applied to explore the correlation of IPL with ESBG, MBL, BICL, and %ESBG.
A total of 102 implants in 62 patients fulfilled the survival criteria, giving the cumulative survival rates of 96.4% and 94.1% for implant-based analysis and patient-based analysis, respectively. The mean ESBG, MBL, and BICL at the latest follow-up were 1.95±0.88 mm, 0.58±0.68 mm, and 5.51±1.47 mm. ESBG was found to be positively correlated to IPL. A significant decreased bone formation efficiency was found when IPL was over 4 mm (P=0.02).
An optimal range of IPL within 4 mm was recommended for better long-term outcomes when applying non-grafting OSFE with simultaneous implant placement.
本研究通过非骨移植骨挤压窦底提升（OSFE）联合同期种植，分析种植体突出长度（IPL）对影响长期效果的可能因素的影响，并探讨 IPL 的最佳范围。
采用回顾性研究设计。收集 65 例患者的 105 个种植体在 3-9 年（平均 5.04 年）随访后的临床和影像学资料。将 IPL 分为三组（组 1，IPL<2mm；组 2，2mm≤IPL<4mm；组 3，IPL≥4mm）。采用窦内骨增量（ESBG）、种植体周围边缘骨丧失（MBL）、骨与种植体接触长度（BICL）和 ESBG 百分比（%ESBG）评估非骨移植 OSFE。采用 Kaplan-Meier 分析评估累积生存率。采用多元线性回归模型探讨可能影响因素与 ESBG 的关系。采用方差分析（ANOVA）探讨 IPL 与 ESBG、MBL、BICL 和 %ESBG 的相关性。
共有 62 例患者的 102 个种植体符合生存标准，种植体为基础和患者为基础的累积生存率分别为 96.4%和 94.1%。末次随访时 ESBG、MBL 和 BICL 的平均值分别为 1.95±0.88mm、0.58±0.68mm 和 5.51±1.47mm。ESBG 与 IPL 呈正相关。当 IPL 超过 4mm 时，骨形成效率显著降低（P=0.02）。
在应用非骨移植 OSFE 联合同期种植时，推荐 IPL 在 4mm 内的最佳范围，以获得更好的长期效果。
