Ferreira de Sá Jaqueline, Nascimento Lays Noleto, de Moraes Sousa Júlia Fonseca, Curado Thalita Fernandes Fleury, Srinivasan Murali, McKenna Gerald, Schimmel Martin, Leles Cláudio Rodrigues
School of Dentistry, Federal University of Goias, Goiania, Goias, Brazil.
Clinic of General-, Special Care- and Geriatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
J Oral Rehabil. 2025 Sep;52(9):1452-1460. doi: 10.1111/joor.14024. Epub 2025 May 9.
This study investigated the effects of implant distribution on functional and patient-reported outcomes of patients treated with a mandibular overdenture retained by four mini implants.
Seventy-four participants received four titanium-zirconium mini implants in the anterior mandible, and the relative position of the implants was assessed in post-treatment computed tomography scans with three reference points in the incisal region and first molars of the overdenture. DICOM files were analysed using Blooming Artefact Reduction filters to allow the visualisation of the mini implants in their three-dimensional position without overlapping bone structures. The implant distribution parameters were the polygon area formed by the four mini implants (implant area), anterior and posterior cantilever extensions, and antero-posterior spread. Outcomes included anterior and posterior maximum voluntary bite force (MBF), masticatory performance (MP), oral health-related quality of life impacts (OHIP-Edent) and satisfaction with the overdenture. Paired t-test, Pearson's correlation test and multiple regression were used for data analysis.
The implant distribution area was the most relevant variable for all functional parameters. The larger the distribution, the better the MP (p = 0.003), and the anterior (p = 0.011) and posterior MBF (p < 0.001). Concerning patient-reported outcomes, no effect of implant distribution was observed (p > 0.05), suggesting that the potential benefit of better distribution may not affect patients' perception of the treatment.
Findings corroborate the influence of implant distribution of the four mini implants on functional parameters and, although the best implant distribution may depend highly on anatomical factors, these parameters should be considered an important prognostic factor for treatment success.
ClinicalTrials.gov: NCT04760457.
本研究调查了种植体分布对采用四颗微型种植体固位的下颌覆盖义齿治疗患者的功能及患者报告结局的影响。
74名参与者在下颌前部植入四颗钛锆合金微型种植体，通过治疗后计算机断层扫描，利用覆盖义齿切缘区域和第一磨牙处的三个参考点评估种植体的相对位置。使用减少光晕伪影滤镜分析DICOM文件，以便在不重叠骨结构的情况下可视化微型种植体的三维位置。种植体分布参数包括由四颗微型种植体形成的多边形面积（种植体面积）、前后悬臂延伸长度以及前后间距。结局指标包括前后最大自主咬合力（MBF）、咀嚼性能（MP）、口腔健康相关生活质量影响（OHIP-Edent）以及对覆盖义齿的满意度。采用配对t检验、Pearson相关检验和多元回归进行数据分析。
种植体分布面积是所有功能参数中最相关的变量。分布面积越大，MP越好（p = 0.003），前MBF（p = 0.011）和后MBF（p < 0.001）也越好。关于患者报告的结局，未观察到种植体分布的影响（p > 0.05），这表明更好分布的潜在益处可能不会影响患者对治疗的感知。
研究结果证实了四颗微型种植体的分布对功能参数的影响，尽管最佳种植体分布可能高度依赖解剖因素，但这些参数应被视为治疗成功的重要预后因素。
ClinicalTrials.gov：NCT04760457。
