Pull-off resistance of a screwless implant-abutment connection and surface evaluation after cyclic loading.

IF 2.7 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Advanced Prosthodontics Pub Date : 2021-06-01 Epub Date: 2021-06-25 DOI:10.4047/jap.2021.13.3.152

Vasilios Alevizakos, Richard Mosch, Gergo Mitov, Ahmed Othman, Constantin von See

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引用次数: 1

Abstract

Purpose: The aim of this study was to investigate to what extent cyclic load affects the screwless implant-abutment connection for Morse taper dental implants.

Materials and methods: 16 implants (SICvantage max) and 16 abutments (Swiss Cross) were used. The screwless implant-abutment connection was subjected to 10,000 cycles of axial loading with a maximum force of 120 N. For the pull-off testing, before and after the same cyclic loading, the required force for disconnecting the remaining 6 implant-abutment connections was measured. The surface of 10 abutments was examined using a scanning electron microscope 120× before and after loading.

Results: The pull-off test showed a significant decrease in the vertical force required to pull the abutment from the implant with mean 229.39 N ± 18.23 before loading, and 204.30 N ± 13.51 after loading (P<.01). Apart from the appearance of polished surface areas and slight signs of wear, no visible damages were found on the abutments.

Conclusion: The deformation on the polished abutment surface might represent the result of micro movements within the implant-abutment connection during loading. Although there was a decrease of the pull-off force values after cyclic loading, this might not have a notable effect on the clinical performance.

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循环加载后无螺纹种植体-基台连接的拉脱阻力及表面评价。

目的:本研究的目的是探讨循环载荷对莫氏锥度种植体无螺纹种植体-基台连接的影响程度。材料和方法:使用16个种植体(SICvantage max)和16个基台(Swiss Cross)。无螺钉种植体-基台连接承受1万次轴向载荷，最大力为120 n。拔离试验中，在相同的循环载荷前后，测量剩余6个种植体-基台连接断开所需的力。加载前后用120倍扫描电镜观察10个基台的表面。结果:拔离试验显示，加载前将基牙拉离种植体所需的垂直力明显降低，平均为229.39 N±18.23，加载后平均为204.30 N±13.51 (p)结论:磨光后基牙表面的变形可能是加载过程中种植体-基牙连接体内部微运动的结果。虽然循环加载后拔离力值有所降低，但对临床表现影响不大。

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来源期刊

Journal of Advanced Prosthodontics DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.70

自引率

3.80%

发文量

期刊介绍： This journal aims to convey scientific and clinical progress in the field of prosthodontics and its related areas to many dental communities concerned with esthetic and functional restorations, occlusion, implants, prostheses, and biomaterials related to prosthodontics. This journal publishes • Original research data of high scientific merit in the field of diagnosis, function, esthetics and stomatognathic physiology related to prosthodontic rehabilitation, physiology and mechanics of occlusion, mechanical and biologic aspects of prosthodontic materials including dental implants. • Review articles by experts on controversies and new developments in prosthodontics. • Case reports if they provide or document new fundamental knowledge.