Effect of Plastic impression transfer copings on the dimensional accuracy of implant impressions

Q3 Dentistry
Tuğçe Koyu, Akın Coşkun, G. Yesilyurt, M. Ulgey, O. Gorler
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Abstract

Purpose: The purpose of this in vitro study was to evaluate the effect of plastic impression transfer copings on the dimensional accuracy of close tray implant impressions. Methods: A master model was constructed using autopolymerizing acrylic resin. Five parallel holes were drilled for implant analogs. Custom impression trays were made with autopolymerizing polymethyl methacrylate resin. The study consisted of 2 groups (n=5): (group 1) Impression was obtained with using plastic impression transfer coping (group 2) Impression was obtained without using plastic impression transfer coping. Vinylpolysiloxane impression material was used for both groups. After the impression were obtained, casts were made by type IV dental stone. Casts were scanned with the lab-type scanner and transferred to the measurement program. Measurements were made from a specific reference corner for each analog to ensure standardization. Data were saved as millimeters and pairwise comparisons were made with Welch's t-test analysis. Results: The effect of plastic caps was evaluated by applying the t-test to each distance. For all distances, the distortion seen in the measurements taken without the cap is higher than the measurements taken with the cap, but no significant differences were found (p>0.05). Conclusions: In the anterior-posterior distances, the distortions were found compression type, in the right-left distances the distortions were found as expansion-type. There is a dimensional change in the measurements taken without a cap, but no clinically significant differences were found.
塑料印模转移涂层对种植体印模尺寸精度的影响
目的:本体外研究的目的是评估塑料印模转移遮盖物对闭合托盘种植印模尺寸精度的影响。方法:采用自聚合丙烯酸树脂构建主模型。钻5个平行孔用于植入物类似物。用自聚合聚甲基丙烯酸甲酯树脂制成自定义压印盘。本研究分为两组(n=5):(1组)使用塑料模移模盖获得印模;(2组)不使用塑料模移模盖获得印模。两组均采用乙烯基聚硅氧烷压模材料。获得印模后,用IV型牙石制作铸型。铸模用实验室式扫描仪扫描,并转移到测量程序。测量从一个特定的参考角为每个模拟,以确保标准化。数据以毫米为单位保存,两两比较采用Welch t检验分析。结果:对每个距离进行t检验,评价塑料帽的效果。对于所有距离,在不带帽的情况下测量的畸变高于带帽的测量,但没有发现显著差异(p>0.05)。结论:在前后距离上,扭曲为压迫型,在左右距离上,扭曲为扩张型。在不戴帽的情况下,测量的尺寸发生了变化,但没有发现临床上显著的差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Cumhuriyet Dental Journal
Cumhuriyet Dental Journal Dentistry-Dentistry (all)
CiteScore
0.40
自引率
0.00%
发文量
0
审稿时长
8 weeks
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