Evaluation of the Effect of Distance Between Dental Abutments on the Accuracy of One-Step and Two-Step Impression Techniques With Polyvinyl Siloxane (PVS) Material

IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical and Experimental Dental Research Pub Date : 2025-03-02 DOI:10.1002/cre2.70100

Seyyed Ahmad Ghoraishian, Mohsen Khataminia, Zahra Shahramian, Maryam Zare, Mina Mohaghegh

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Abstract

Objective

The aim of this study was to evaluate the effect of distance between dental abutments on the accuracy of one-step and two-step impression techniques with polyvinyl siloxane (PVS) material.

Materials and Methods

Four master models were fabricated with different interabutment distances equal to one, two, three, and four premolar lengths 1–4 (L1, L2, L3, and L4). Seven one-step impressions were taken from each master model using PVS impression material (Group A, n = 7). For two-step impressions, a 1.5 mm polyethylene spacer was used over each master model, and impressions were taken (Group B, n = 7). Scans from the casts were superimposed over the master model scans. Accordingly, differences were measured and compared with statistical tests (Kolmogorov–Smirnoff test, Mann–Whitney test, and Friedman's test) to evaluate the effect of interabutment distance within each impression technique group and also compare the one-step and two-step impression techniques. p value < 0.05 was considered statistically significant.

Results

A statistically significant difference was noted among the different edentulous areas in the one-step impression technique group (Group A, p = 0.010). At edentulous span, a statistically significant difference was recorded (p = 0.047) with two-step impression technique being more accurate compared to the one-step impression technique. Friedman's pairwise analysis in Group A demonstrated a significance between one premolar and four premolar interabutment distance groups (p = 0.006).

Conclusion

The accuracy of the one-step impression is significantly affected by the increase in interabutment distance from one premolar to four premolar edentulous.

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基台间距对聚乙烯醇硅氧烷（PVS）材料一步印模和两步印模精度影响的评价

目的探讨基台间距对聚乙烯醇硅氧烷（PVS）材料一步印模和两步印模精度的影响。材料与方法采用1、2、3、4个前磨牙长度1 ~ 4 (L1、L2、L3、L4)，分别制作4个基牙间距不同的主模型。使用PVS印模材料从每个主模型上取7个一步印模（A组，n = 7）。对于两步印模，在每个主模型上使用1.5 mm聚乙烯垫片，并进行印模（B组，n = 7）。来自铸模的扫描被叠加在主模型扫描上。因此，测量差异并与统计检验（Kolmogorov-Smirnoff检验、Mann-Whitney检验和Friedman检验）进行比较，以评估每个印模技术组中基台间距离的影响，并比较一步印模技术和两步印模技术。P值<； 0.05认为有统计学意义。结果一步压印技术组不同无牙区间差异有统计学意义（A组，p = 0.010）。在无牙跨距上，两步印模法比一步印模法更准确，差异有统计学意义（p = 0.047）。A组的Friedman’s两两分析显示1个前磨牙和4个前磨牙基牙间距离组之间存在显著性差异（p = 0.006）。结论无牙者从1个前磨牙到4个前磨牙的基牙间距增加对一步印模的准确性有显著影响。

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来源期刊

Clinical and Experimental Dental Research DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

3.30

自引率

5.60%

发文量

165

审稿时长

26 weeks

期刊介绍： Clinical and Experimental Dental Research aims to provide open access peer-reviewed publications of high scientific quality representing original clinical, diagnostic or experimental work within all disciplines and fields of oral medicine and dentistry. The scope of Clinical and Experimental Dental Research comprises original research material on the anatomy, physiology and pathology of oro-facial, oro-pharyngeal and maxillofacial tissues, and functions and dysfunctions within the stomatognathic system, and the epidemiology, aetiology, prevention, diagnosis, prognosis and therapy of diseases and conditions that have an effect on the homeostasis of the mouth, jaws, and closely associated structures, as well as the healing and regeneration and the clinical aspects of replacement of hard and soft tissues with biomaterials, and the rehabilitation of stomatognathic functions. Studies that bring new knowledge on how to advance health on the individual or public health levels, including interactions between oral and general health and ill-health are welcome.