Retrospective radiographic observational study of 1692 Straumann tissue-level dental implants over 10 years. II. Marginal bone stability
Retrospective radiographic observational study of 1692 Straumann tissue-level dental implants over 10 years. II. Marginal bone stability
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DOI：
10.1111/cid.12636
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发表时间：
2018-10-01
影响因子：
3.6
通讯作者：
Lee, Jung-Seok
中科院分区：
文献类型：
--
作者：
Kang, Myung-Hun;Jung, Ui-Won;Lee, Jung-Seok
背景尽管越来越多的证据表明种植体周围边缘骨水平的纵向稳定性，但基于相对较大的患者群体中的某些种植体，边缘骨丢失的诱发危险因素的证据有限。目的本研究的目的是回顾性确定Straumann组织水平牙种植体在随访期间（最长持续10年）周围的边缘骨丢失，以及种植体周围边缘骨丢失的诱发危险因素。方法本研究对881名患者的1692颗士卓曼组织级牙种植体进行了分析，并收集了相关数据。通过定期X光片测量种植体周围边缘骨水平，并从手术到10年后累积分析骨水平的变化。采用对数秩检验筛选边缘骨丢失的候选关键危险因素，并使用 Cox 回归和共享衰弱模型进行多变量分析。 结果 3、5、7 和 9 年种植体周围骨丢失总体分别为 0.070.21mm、0.09+/-0.26mm、0.14+/-0.41mm 和 0.17+/-0.45mm。分别。在随访期间，只有 14 个种植体显示出病理性边缘骨丢失超过 2 毫米。虽然 2 个种植体因持续进行性边缘骨丢失而被移除，但 14 个种植体中的 5 个在第一年内显示出超过 1 毫米的早期骨丢失，但随后往往显示出稳定的边缘骨水平。在其他七颗种植体中，骨质流失在第一年后就开始出现，并持续进展。多变量分析显示种植体直径影响种植体周围边缘骨丢失。结论士卓曼组织级牙种植体仅有轻微的种植体周围边缘骨丢失，病理性边缘骨丢失超过2mm的发生率非常低。
BackgroundDespite accumulating evidence for the longitudinal stability of the marginal bone level around an implant, there is limited evidence of predisposing risk factors for marginal bone loss based on some implants in a relatively large patient population.PurposeThe aim of this study was to retrospectively determine the marginal bone loss around Straumann tissue-level dental implants during follow-up periods among which the maximum lasts up to 10 years, as well as the predisposing risk factors for peri-implant marginal bone loss.Materials and MethodsThis study analyzed 1692 Straumann tissue-level dental implants in 881 patients, and relevant data were collected. The peri-implant marginal bone level was measured on periodic radiographs, and the changes in bone level were analyzed cumulatively from surgery until up to 10 years later. The log-rank test was used to select candidate critical risk factors for marginal bone loss, and multivariate analysis using Cox regression with the shared frailty model was performed.ResultsThe overall peri-implant bone loss was 0.070.21mm, 0.09 +/- 0.26mm, 0.14 +/- 0.41mm, and 0.17 +/- 0.45mm at 3, 5, 7, and 9 years, respectively. Only 14 implants showed pathologic marginal bone loss exceeding 2mm during the follow-up period. While 2 implants were removed with continuous progressive marginal bone loss, 5 of the 14 implants showed early bone loss exceeding 1mm within the first year but then subsequently tended to show a stable marginal bone level. In the other seven implants, bone loss started after the first year and progressed continuously. Multivariate analysis revealed that diameter of the implant affected the peri-implant marginal bone loss.ConclusionsStraumann tissue-level dental implants showed only slight peri-implant marginal bone loss, with a very low incidence of pathologic marginal bone loss exceeding 2mm.