Graduate student, Department of Prevention and Oral Rehabilitation, School of Dentistry, Federal University of Goias (UFG), Goiania, Goias, Brazil.
Associate Researcher, Department of Prevention and Oral Rehabilitation, School of Dentistry, Federal University of Goias (UFG), Goiania, Goias, Brazil.
J Prosthet Dent. 2022 Nov;128(5):949-955. doi: 10.1016/j.prosdent.2021.01.007. Epub 2021 Feb 25.
Previous studies on single-implant mandibular overdentures have reported favorable results for clinical and patient-reported outcomes. However, information from longer term clinical studies is lacking.
The purpose of this clinical study was to assess clinical, radiographic, and patient-reported outcomes of edentulous individuals rehabilitated with single-implant mandibular overdentures after a 5-year follow-up.
A prospective clinical study was performed including completely edentulous individuals who received new conventional complete dentures and then an external hexagon implant in the mandibular midline region, followed by the incorporation of a retention system (O-ring/ball attachment; Neodent). Data collection occurred at baseline and 3, 6, 12, 24, and 60 months after implant loading. Assessed outcomes included implant stability, peri-implant soft tissue condition, peri-implant marginal bone level, satisfaction with the prostheses, and oral health-related quality of life (OHRQoL). Clinical maintenance events were also recorded. Descriptive statistics, incidence rates, Wilcoxon Signed Ranks test, and Generalized Estimating Equation regression were used for data analysis (α=.05).
Thirty of 34 eligible participants attended the 5-year follow-up visit, mean ±standard deviation age was 68.1 ±7.8 years, and 70% were women. The overall implant survival rate was 88.9%. After 5 years, the OHRQoL showed statistically significant improvement for all evaluation periods compared with baseline (P<.001). Regarding satisfaction with the mandibular denture, a significant increase was found between all evaluation periods compared with baseline in terms of comfort, stability, and ability to masticate (P<.001). Implant stability significantly increased (P=.003), and a mean bone loss of 1.46 mm was observed compared with baseline measures. The most frequent maintenance event was replacement of the O-ring matrix (n=80). Twenty-one midline fractures of the overdenture occurred in 14 study participants. No significant changes in peri-implant soft tissue conditions were observed.
A single-implant mandibular overdenture effectively maintained the positive effect of the intervention on oral health-related quality of life and patient satisfaction, stable peri-implant condition, and acceptable rates of prosthetic events.
先前关于下颌单种植体覆盖义齿的研究报告了临床和患者报告结果的良好结果。然而，缺乏来自长期临床研究的信息。
本临床研究的目的是评估经过 5 年随访后，用下颌单种植体覆盖义齿修复的无牙颌患者的临床、影像学和患者报告结果。
进行了一项前瞻性临床研究，包括完全无牙的个体，他们接受了新的常规全口义齿，然后在下颌中线区域植入外六角种植体，随后加入了一个保留系统（O 形环/球附着体；Neodent）。数据收集在植入物加载后的基线、3、6、12、24 和 60 个月进行。评估的结果包括种植体稳定性、种植体周围软组织状况、种植体周围边缘骨水平、对义齿的满意度以及口腔健康相关生活质量（OHRQoL）。还记录了临床维护事件。使用描述性统计、发病率、Wilcoxon 符号秩检验和广义估计方程回归进行数据分析（α=.05）。
34 名符合条件的参与者中有 30 名参加了 5 年随访，平均年龄±标准差为 68.1±7.8 岁，70%为女性。总体种植体存活率为 88.9%。5 年后，与基线相比，所有评估期的 OHRQoL 均显示出统计学显著改善（P<.001）。关于对下颌义齿的满意度，与基线相比，所有评估期在舒适度、稳定性和咀嚼能力方面均有显著增加（P<.001）。种植体稳定性显著增加（P=.003），与基线测量相比，平均骨损失为 1.46 毫米。最常见的维护事件是更换 O 形环矩阵（n=80）。14 名研究参与者中有 21 名发生了中线义齿骨折。未观察到种植体周围软组织状况的显著变化。
下颌单种植体覆盖义齿有效地维持了干预对口腔健康相关生活质量和患者满意度的积极影响，维持了种植体周围状况的稳定，以及可接受的修复体事件发生率。
