Samir Abou-Ayash, Martin Schimmel, Andreas Worni, Norbert Enkling
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Mean retention forces, SDs, and 95% CI were calculated. Analysis of variance was used to test the global differences, and post hoc pairwise comparisons were subsequently applied. The level of significance was set to P < .05.</p><p><strong>Results: </strong>ANOVA (global P < .0001) and pairwise comparisons (all P < .0001) demonstrated statistically significant differences among the three different matrix and O-ring combinations, with mean values of 5.18 N (MH 1), 6.73 (MH 2), and 9.08 (MH 3). Within each combination, retention force variations of > 1 N could not be demonstrated; ie, by exchanging O-rings, a similar retention force can be reestablished.</p><p><strong>Conclusion: </strong>Matrix and O-ring dimensions have a significant influence on retention forces in one-piece MDIs. 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引用次数: 1
摘要
目的:分析体外条件下原始基质和o形环尺寸对单片球形微型种植体固位力和再现性的影响。材料和方法:在直径1.8 mm的种植体上评估三种不同的基质和o型环组合(MH1-MH3)(每组n = 50)。将基质手动安装在植入物上，随后使用带两个应变计的金属销钉以垂直线性方式移除，记录断开时的最大力。五次断开后，交换o形圈，计算平均保持力，得到每个矩阵和o形圈组合的50个值。计算平均固位力、SDs和95% CI。方差分析用于检验整体差异，随后应用事后两两比较。显著性水平设为P < 0.05。结果:方差分析(总P < 0.0001)和两两比较(均P < 0.0001)显示，三种不同的矩阵和o型环组合之间存在统计学差异，平均值分别为5.18 N (MH 1)、6.73 N (MH 2)和9.08 N (MH 3)。在每种组合中，无法显示> 1 N的固位力变化;即，通过交换o形环，可以重新建立类似的保持力。结论:矩阵和o形环尺寸对一体式吸入器固位力有显著影响。原始o型环在所有基质中表现出高度可复制的初始保留力。
O-Ring Attachments on One-Piece Mini Dental Implants: In Vitro Analysis of Retention Force Reproducibility Using Different Pristine Matrix-O-Ring Combinations
Purpose: To analyze the influence of pristine matrix and O-ring dimensions on retention force and reproducibility in single one-piece mini dental implants (MDIs) with ball patrices under in vitro conditions.
Materials and methods: Three different matrix and O-ring combinations (MH1-MH3) were evaluated (n = 50 per group) on 1.8-mm-diameter implants. The matrices were manually mounted on the implants and were subsequently removed in a vertical linear manner using a metal pin with two strain gauges, recording the maximum force during disconnection. After five disconnections, the O-rings were exchanged, and the mean retention force was calculated, resulting in 50 values for each matrix and O-ring combination. Mean retention forces, SDs, and 95% CI were calculated. Analysis of variance was used to test the global differences, and post hoc pairwise comparisons were subsequently applied. The level of significance was set to P < .05.
Results: ANOVA (global P < .0001) and pairwise comparisons (all P < .0001) demonstrated statistically significant differences among the three different matrix and O-ring combinations, with mean values of 5.18 N (MH 1), 6.73 (MH 2), and 9.08 (MH 3). Within each combination, retention force variations of > 1 N could not be demonstrated; ie, by exchanging O-rings, a similar retention force can be reestablished.
Conclusion: Matrix and O-ring dimensions have a significant influence on retention forces in one-piece MDIs. Pristine O-rings demonstrated highly reproducible initial retention forces in all matrices.
期刊介绍：
Official Journal of the European Association for Osseointegration (EAO), the International College of Prosthodontists (ICP), the German Society of Prosthodontics and Dental Materials Science (DGPro), and the Italian Academy of Prosthetic Dentistry (AIOP)
Prosthodontics demands a clinical research emphasis on patient- and dentist-mediated concerns in the management of oral rehabilitation needs. It is about making and implementing the best clinical decisions to enhance patients'' quality of life via applied biologic architecture - a role that far exceeds that of traditional prosthetic dentistry, with its emphasis on materials and techniques. The International Journal of Prosthodontics is dedicated to exploring and developing this conceptual shift in the role of today''s prosthodontist, clinician, and educator alike. The editorial board is composed of a distinguished team of leading international scholars.
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