Doctoral student, Department of Oral and Maxillofacial Surgery, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
Professor, Department of Fixed and Removable Prosthodontics and Biomaterials, Center for Dentistry and Oral Hygiene, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.
J Prosthet Dent. 2018 Oct;120(4):506-512. doi: 10.1016/j.prosdent.2017.12.009. Epub 2018 Apr 25.
Long-term assessments of implant survival and treatment outcome in patients with oligodontia are lacking.
The purpose of this retrospective clinical study was to assess which factors determine a long-term implant survival and treatment outcome of up to 25 years in a cohort of patients with oligodontia.
The medical records of all patients with oligodontia treated with fixed implant prosthodontics between January 1991 and December 2015 in the Department of Oral and Maxillofacial Surgery at the University Medical Center Groningen, the Netherlands, were assessed. Specifically, this involved the retrieval of records on the need for and mode of bone augmentation, implant survival, and survival of and adverse events associated with the prosthodontics. The Kaplan-Meier estimator was used to analyze implant and superstructure survival. Log-rank tests were used to compare the survival of subgroups.
A total of 126 patients with oligodontia were treated with dental implants. Of the 777 implants in total, 56 were lost, resulting in a 5-year cumulative survival of 95.7% (95% confidence interval [CI], 94.2% to 97.2%) and a 10-year cumulative survival of 89.2% (95% CI, 86.2% to 92.2%). The survival of implants placed in regions where bone augmentation surgery had been performed was significantly lower. The 5-year cumulative superstructure survival was 90.5% (95% CI, 87.6% to 93.5%), and the 10-year cumulative superstructure survival was 80.3% (95% CI, 75.3% to 85.3%). The performance of the screw-retained and cemented superstructures was comparable, but the survival of single crowns was significantly higher than the survival of fixed partial dentures (P<.001).
Implant treatment is a predictable treatment option for patients with oligodontia with a favorable long-term outcome. Survival of implants in augmented areas is lower.
缺乏对少牙畸形患者种植体存活和治疗效果的长期评估。
本回顾性临床研究的目的是评估哪些因素决定了少牙畸形患者长达 25 年的种植体存活和治疗效果。
评估了荷兰格罗宁根大学医学中心口腔颌面外科 1991 年 1 月至 2015 年 12 月期间接受固定种植体修复的所有少牙畸形患者的病历。具体而言，这涉及检索关于骨增量的必要性和模式、种植体存活以及修复体的存活和相关不良事件的记录。使用 Kaplan-Meier 估计器分析种植体和上部结构的存活情况。对数秩检验用于比较亚组的存活情况。
共对 126 名少牙畸形患者进行了牙种植治疗。总共 777 个种植体中有 56 个丢失，5 年累积存活率为 95.7%（95%置信区间 [CI]，94.2%至 97.2%），10 年累积存活率为 89.2%（95% CI，86.2%至 92.2%）。在接受过骨增量手术的区域放置的种植体的存活率明显较低。5 年累积上部结构存活率为 90.5%（95% CI，87.6%至 93.5%），10 年累积上部结构存活率为 80.3%（95% CI，85.3%至 95.3%）。螺丝固位和粘结固位上部结构的性能相当，但单冠的存活率明显高于固定局部义齿（P<.001）。
种植治疗是少牙畸形患者的一种可预测的治疗选择，具有良好的长期效果。在增强区域的植入物存活率较低。
