A retrospective study on clinical and radiological outcomes of oral implants in patients followed up for a minimum of 20 years
A retrospective study on clinical and radiological outcomes of oral implants in patients followed up for a minimum of 20 years
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DOI：
10.1111/cid.12571
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发表时间：
2018-04-01
影响因子：
3.6
通讯作者：
Wennerberg, Ann
中科院分区：
文献类型：
--
作者：
Chrcanovic, Bruno Ramos;Kisch, Jeno;Wennerberg, Ann
文献中对口腔种植体进行长期随访的报道很少。目的评价随访20年以上的口腔种植体失败率和边缘骨质流失（MBL）。材料与方法纳入随访20年以上的患者。进行描述性统计、生存分析、广义估计方程。随机选择300个植入物用于MBL。结果共纳入种植体1045颗（227例）。种植体的位置、照射和磨牙影响种植体的存活率。35%的失败发生在植入后的第一年，另外26.8%发生在第二/第三年。随访36年，累计生存率为87.8%。在最后一次放射学随访中，35个种植体（11.7%）出现骨增长，35个种植体（11.7%）出现至少3mm的MBL。86例失败的种植体中有26例在种植体失败前的最后一次放射登记中有严重的MBL。结论大多数种植体失败发生在种植后的头几年，而不考虑长时间的随访。在长期观察中，MBL可能是微不足道的，但在某些情况下，它可能是口腔种植体继发性失败的原因。
BackgroundVery long-term follow-up of oral implants is seldom reported in the literature.PurposeTo assess oral implant failure rates and marginal bone loss (MBL) of patients followed up for a minimum of 20 years.Materials and MethodsImplants placed in patients followed up for 20+ years were included. Descriptive statistics, survival analyses, generalized estimating equations were performed. Three-hundred implants were randomly selected for MBL.Results1,045 implants (227 patients) were included. Implant location, irradiation, and bruxism affected the implant survival rate. Thirty-five percent of the failures occurred within the first year after implantation, and another 26.8% in the second/third year. There was a cumulative survival rate of 87.8% after 36 years of follow-up. In the last radiological follow up, 35 implants (11.7%) had bone gain, and 35 implants (11.7%) presented at least 3 mm of MBL. Twenty-six out of 86 failed implants with available radiograms presented severe MBL in the last radiological register before implant failure.ConclusionsMost of the implant failures occurred at the first few years after implantation, regardless of a very long follow up. MBL can be insignificant in long-term observations, but it may, nevertheless, be the cause of secondary failure of oral implants in some cases.