Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.
Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.
Clin Implant Dent Relat Res. 2021 Apr;23(2):178-188. doi: 10.1111/cid.12961. Epub 2020 Nov 10.
Knowledge on peri-implantitis bone defect characteristics and predictors is still limited.
To describe peri-implantitis bone defect characteristics and identify possible predictors.
Various parameters at patient- (age, gender, smoking, and supra-structure), implant- (surface, type, connection, platform, and misfit), and site level (region, alveolar ridge position, defect characteristics, neighboring structure) were recorded retrospectively.
Among 193 implants, the most prevalent defects were class Ic (25.4%), and Id (23.8%); a previously non-described category "class Id with only one bone wall" was frequently observed (11.9%). Mean intrabony defect depth and width ranged from 4.5 to 6.2 mm and from 2.7 to 2.9 mm, respectively; mean dehiscence extent ranged from 2.8 to 7.0 mm. A total of 37.8% of the defects presented horizontal bone loss and an intrabony component; in 52.7% of the implants, total defect extent was >6 mm. Jaw region, implant position within the alveolar ridge, and implant/abutment misfit showed significant associations either to defect configuration and/or defect extent.
(a) Most common peri-implantitis defects exhibited a combination of intrabony component and a buccal/oral dehiscence, while purely circumferential defects were relatively seldom; (b) implants with defects with bone dehiscence were placed more frequently closer to the lateral aspect of the ridge harboring the dehiscence; (c) implants placed in the lower anterior region had the highest risk for more severe peri-implant bone loss; and (d) peri-implant bone defects with only a single bone wall appropriate for regenerative procedure were relatively frequent.
关于种植体周围炎骨缺损特征和预测因素的知识仍然有限。
描述种植体周围炎骨缺损特征并确定可能的预测因素。
回顾性记录患者（年龄、性别、吸烟和上部结构）、种植体（表面、类型、连接、平台和不匹配）和部位（区域、牙槽嵴位置、缺损特征、相邻结构）的各种参数。
在 193 个种植体中，最常见的缺损类型为 Ic 类（25.4%）和 Id 类（23.8%）；经常观察到一种以前未描述的“仅一个骨壁的 Id 类”类别（11.9%）。平均骨内缺损深度和宽度分别为 4.5 至 6.2mm 和 2.7 至 2.9mm；平均骨开窗程度为 2.8 至 7.0mm。37.8%的缺损呈水平骨丧失和骨内成分；在 52.7%的种植体中，总缺损程度>6mm。颌骨区域、牙槽嵴内种植体位置和种植体/基台不匹配与缺损形态和/或缺损程度均有显著关联。
（a）最常见的种植体周围炎缺损表现为骨内成分和颊/舌侧骨开窗的组合，而单纯的环形缺损相对较少；（b）存在骨开窗缺损的种植体更常放置在靠近具有骨开窗的嵴的外侧；（c）在下前牙区放置的种植体发生更严重种植体周围骨丧失的风险最高；（d）适合再生治疗的仅有一个骨壁的种植体周围骨缺损相对较常见。
