Lops Diego, Romeo Eugenio, Stocchero Michele, Palazzolo Antonino, Manfredi Barbara, Sbricoli Luca
Department of Prosthodontics, Dental Clinic, School of Dentistry, University of Milan, 20142 Milan, Italy.
Department of Neurosciences, School of Dentistry, University of Padova, 35128 Padova, Italy.
J Clin Med. 2022 Apr 4;11(7):2014. doi: 10.3390/jcm11072014.
The aim of the present retrospective study was to assess marginal bone changes around implants restored with different prosthetic emergence profile angles. Patients were treated with implants supporting fixed dentures and were followed for 3 years. Marginal bone levels (MBL) measured at the prosthesis installation (t0) and at the 3-year follow-up visit (t1) were considered. The MBL change from t0 to t1 was investigated. Two groups were considered: Group 1 for restorations with an angle between implant axis and prosthetic emergence profile >30°, and Group 2 for those with an angle ≤30°, respectively. Moreover, peri-implant soft tissue parameters, such as the modified bleeding index (MBI) and plaque index (PI) were assessed. Seventy-four patients were included in the analysis and a total of 312 implants were examined. The mean EA in groups 1 and 2 was 45 ± 4 and 22 ± 7 degrees, respectively. The mean marginal bone level change (MBL change) of 0.06 ± 0.09 mm and 0.06 ± 0.10 mm were, respectively, in groups 1 and 2. The difference in the MBL change between the two groups was not statistically significant (p = 0.969). The MBL change does not seem to be influenced by the emergence angle for implants with a stable internal conical connection and platform-switching of the abutment diameter.
本回顾性研究的目的是评估不同修复体龈缘轮廓角度修复的种植体周围的边缘骨变化。患者接受种植体支持的固定义齿治疗，并随访3年。考虑在义齿安装时（t0）和3年随访时（t1）测量的边缘骨水平（MBL）。研究了从t0到t1的MBL变化。分为两组：第1组为种植体长轴与修复体龈缘轮廓角度>30°的修复体，第2组为角度≤30°的修复体。此外，还评估了种植体周围软组织参数，如改良出血指数（MBI）和菌斑指数（PI）。74例患者纳入分析，共检查312颗种植体。第1组和第2组的平均EA分别为45±4度和22±7度。第1组和第2组的平均边缘骨水平变化（MBL变化）分别为0.06±0.09mm和0.06±0.10mm。两组间MBL变化的差异无统计学意义（p=0.969）。对于具有稳定内锥形连接和基台直径平台转换的种植体，MBL变化似乎不受龈缘角度的影响。
