Galindo-Moreno Pablo, Catena Andres, Lopez-Chaichio Lucia, Borges Tiago, O'Valle Francisco, Torrecillas-Martínez Laura, Padial-Molina Miguel
Department of Oral Surgery and Implant Dentistry, School of Dentistry, University of Granada, 18071 Granada, Spain.
Instituto de Investigación Biosanitaria ibs.GRANADA, 18071 Granada, Spain.
J Clin Med. 2023 Oct 21;12(20):6665. doi: 10.3390/jcm12206665.
The aim of this study was to analyze the long-term marginal bone level (MBL) of implants supporting fixed full-arch restoration in patients who had previously lost their dentition due to severe periodontitis. This retrospective study included 35 patients in whom 342 implants with internal tapered conical connections were placed. MBL was analyzed radiographically over time and a long-term estimation of MBL was calculated. A mixed linear model with abutment height, graft, diameter and location (maxilla/mandible) as factors and gender, age, implant length and prosthetic variables as covariates was used to evaluate the influence on MBL. MBL in these patients showed an estimator of predictions at 4108 days after loading of -0.307 mm, SE = 0.042. Only 0.15% of implants were radiographically affected with MBL of 3 mm or more. The mixed linear model results showed a main effect of the type of opposing dentition, gender, implant diameter, and abutment height. Particularly, an abutment height of 1 mm had associated larger MBL than the remaining heights. Thus, it can be concluded that dental implants restored with fixed segmented full-arch rehabilitation in patients with a history of severe periodontal disease do not suffer important marginal bone loss if some specific factors are considered, mainly the use of long transmucosal abutments (≥2 mm).
本研究的目的是分析在先前因重度牙周炎而失牙的患者中，支持固定全牙弓修复的种植体的长期边缘骨水平（MBL）。这项回顾性研究纳入了35例患者，共植入了342颗带有内部锥形连接的种植体。随时间对MBL进行影像学分析，并计算MBL的长期估计值。使用以基台高度、植骨、直径和位置（上颌/下颌）为因素，性别、年龄、种植体长和修复变量为协变量的混合线性模型来评估对MBL的影响。这些患者的MBL在加载后4108天的预测估计值为-0.307 mm，标准误=0.042。影像学检查显示，只有0.15%的种植体边缘骨水平受影响达3 mm或更高。混合线性模型结果显示，对颌牙列类型、性别、种植体直径和基台高度有主要影响。特别是，1 mm的基台高度与比其他高度更大的MBL相关。因此，可以得出结论，如果考虑一些特定因素，主要是使用长的穿黏膜基台（≥2 mm），那么在有重度牙周疾病史的患者中，采用固定分段全牙弓修复的牙种植体不会出现严重的边缘骨丢失。
