In vitro analysis of the marginal adaptation and discrepancy of stainless steel crowns.

Acta Biomaterialia Odontologica Scandinavica Pub Date : 2018-02-28 eCollection Date: 2018-01-01 DOI:10.1080/23337931.2018.1444995
Riaan Mulder, Rasha Medhat, Nadia Mohamed
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引用次数: 11

Abstract

Aim: The purpose of the study was to assess the marginal adaptation and discrepancy of SSC's. Differences in adaptation and discrepancy between the four surfaces (mesial, lingual, distal, and buccal) were evaluated. Methods: The placement of stainless steel crowns were completed on a phantom head in accordance with the clinical technique. The ideal tooth preparation was made and this 'master tooth' duplicated to achieve a sample size of 15. The stainless steel crowns were placed, trimmed, and cemented as per the clinical technique. The cemented stainless crowns were analyzed under 100× stereomicroscope magnification. The marginal adaptation and discrepancy of each specimen was measured every 2 µm. Results: All the specimens showed marginal adaptation and discrepancy. The lingual margin had a significantly better adaptation (p < .0001) over the other surfaces. The buccal surface was the only surface that had an appropriate supra-CEJ level with a significance of p < .0001. Conclusion: The marginal discrepancies occur during the trimming procedure and assessment of the gingival approximation of the SSC margin. The inspection of stainless steel crown adaptation and discrepancy is an essential clinical step.

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不锈钢冠的体外边缘适应与差异分析。
目的:研究SSC的边缘适应和差异。评估了四个面(中、舌、远端和颊)的适应差异和差异。方法:按照临床技术,在假体头上完成不锈钢冠的放置。制作了理想的牙齿准备,并复制了这颗“主牙”,以达到15个样本量。按照临床技术放置、修剪和粘接不锈钢冠。在100倍立体显微镜下对胶结后的不锈钢冠进行分析。每2µm测量每个标本的边际适应和差异。结果:所有标本均表现出一定程度的适应性和差异性。结论:侧切缘的边缘差异发生在侧切缘的修整过程和龈缘近似的评估过程中。不锈钢冠的适应和差异检查是临床必不可少的步骤。
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