Dental School, Department of Implant Dentistry, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
J Clin Periodontol. 2023 Jan;50(1):36-44. doi: 10.1111/jcpe.13726. Epub 2022 Oct 7.
To evaluate bar-supported maxillary implant overdenture treatment when supported by either four or six implants after 10 years.
Edentulous subjects with maxillary denture complaints and ample bone volume to facilitate implants in the anterior region of the maxilla were planned for implant overdenture treatment, randomized to receive either four implants (n = 25) or six implants (n = 25) and subsequently evaluated after 10 years of function. Outcome variables included peri-implant bone-level changes, implant and overdenture survival, complications, presence of plaque, calculus and bleeding, degree of peri-implant inflammation, probing depth and patient satisfaction. Differences between the groups and between evaluation periods were tested with a Student's t-test.
Fourteen patients with totally 72 implants were lost to follow-up. Two patients from the six-implant group experienced implant loss (four implants), resulting in 96.1% implant survival in this group versus 100% survival in the four-implant group. Clinical, radiographical and patient-reported outcome measures did not differ statistically significant between the two groups. Patients from both groups were generally quite satisfied with the result after 10 years.
Similar and favourable outcomes are seen in bar-supported maxillary overdentures on either four or six anteriorly placed implants after a 10-year evaluation period.
评估在 10 年后，采用四颗或六颗种植体支持的杆卡式上颌覆盖义齿治疗的效果。
计划对上颌骨前部有足够骨量以利于种植体植入且有上颌义齿修复抱怨的无牙颌患者进行种植覆盖义齿治疗，将其随机分为两组，分别接受四颗种植体（n=25）或六颗种植体（n=25）支持的治疗，并在 10 年的功能随访后进行评估。主要观察指标包括种植体周围骨水平变化、种植体和覆盖义齿的存活率、并发症、菌斑、牙石和出血情况、种植体周围炎的严重程度、探诊深度和患者满意度。使用 Student's t 检验比较两组之间以及各评估时间点之间的差异。
共有 14 名患者（72 颗种植体）失访。六颗种植体组中有 2 名患者发生种植体失败（四颗种植体），导致该组种植体的存活率为 96.1%，而四颗种植体组的存活率为 100%。两组的临床、影像学和患者报告的结果测量指标在统计学上无显著差异。两组患者在 10 年后均对结果较为满意。
在 10 年的评估期内，采用四颗或六颗前牙区种植体支持的杆卡式上颌覆盖义齿治疗可获得相似且良好的效果。
