In vitro evaluation of prosthodontic impression on natural dentition: a comparison between traditional and digital techniques.

ORAL and Implantology Pub Date : 2017-02-14 eCollection Date: 2016-01-01 DOI:10.11138/orl/2016.9.1S.021

G Malaguti, R Rossi, B Marziali, A Esposito, G Bruno, C Dariol, A DI Fiore

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引用次数: 22

Abstract

Objectives: The aim of this in vitro study is to evaluate the marginal and internal fit of zirconia core crowns manufactured following different digital and traditional workflows.

Methods: A 6° taper shoulder prepared abutment tooth was used to produce 20 zirconia core crowns using four different scanning techniques: scanned directly with the extraoral lab scanner, scanned with intraoral scanner, dental impressions using individual dental tray and polyether, dental casts from a polyether impressions. Marginal and internal fits were evaluated with digital photography and the silicone replica method.

Results: Medium marginal gaps were 76,00 μm ± 28.9 for extraoral lab scanner, 80.50 μm ± 36,2 for intraoral scanner, 88.10 μm ± 34,8 for dental impression scan and 112,4 μm ± 37,2 for dental cast scan. Medium internal gaps were 23.20 μm ± 10,3 for extraoral lab scanner, 16.20 μm ± 8.3 for intraoral scanner, 27.20 μm ± 16.7 for dental impression scan and 30.20 μm ± 12.7 for dental cast scan.

Conclusion: Internal gap were extensively lower than 70 μm described in literature. Marginal fit was higher than ideal values for all the techniques but within the limit of clinical success. Intraoral scanners obtained the best results for internal gap.

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自然牙列修复印模的体外评价:传统技术与数字技术的比较。

目的:本体外研究的目的是评估不同数字和传统工作流程制造的氧化锆核冠的边缘和内部配合度。方法:采用4种不同的扫描技术:口外实验室扫描仪直接扫描、口内扫描仪扫描、单独牙托印模和聚醚印模印模，以6°锥度肩为基牙制备20个氧化锆核冠。采用数码摄影和硅胶复制法评估边缘和内部配合。结果:口腔外实验室扫描的中等边缘间隙为76000 μm±28.9，口腔内扫描为80.50 μm±36,2，牙印模扫描为88.10 μm±34,8，铸型扫描为1124 μm±37,2。口腔外实验室扫描为23.20 μm±10.3，口内扫描为16.20 μm±8.3，印模扫描为27.20 μm±16.7，铸型扫描为30.20 μm±12.7。结论:文献描述的内间隙广泛小于70 μm。所有技术的边际拟合均高于理想值，但在临床成功的限度内。口腔内扫描对内间隙的检查效果最好。

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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ORAL and Implantology Dentistry-Dentistry (all)

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