使用两种扫描仪和铣削装置组合制作的二硅酸锂冠，不同的粘接剂空间对边缘间隙的影响。

IF 1.9 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Australian dental journal Pub Date : 2024-03-12 DOI:10.1111/adj.13014

J Dudley, J Xu

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引用次数: 0

摘要

背景：本研究比较了在三种不同的粘接间隙下使用当代和老式扫描仪/铣削装置组合制作的CAD/CAM二硅酸锂（LDS）牙冠的边缘间隙：二十四名本科生在模拟环境中为哥伦比亚模型左下第一磨牙制作 LDS 牙冠。使用 E4D 扫描仪/E4D 铣削装置（E4DS/E4DM）和 TRIOS 3 扫描仪/Sirona inLab MC X5 铣削装置（TRIO/MCX5），在 50、100 和 200 μm 的骨水泥间隙设置下，为每个牙冠制备一个 LDS 牙冠。将每个 LDS 牙冠放置在原始牙冠制备体上，然后使用体视显微镜在四个位置（颊中、舌中、趾中和趾间）进行三次垂直边缘间隙测量。计算出每个牙冠和每个牙面的平均边缘间隙（MMG）：TRIO/MCX5制作的CAD/CAM LDS牙冠在50μm、100μm和200μm时的平均边缘间隙分别为72.31μm、63.73μm和46.23μm：结论：在两种扫描仪/铣削单元组合中，增大水门汀间隙都会降低MMG。在 200 μm 骨水泥间隙时，使用较新的扫描仪/铣削装置发现的 MMG 最小。© 2024 澳大利亚牙科协会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The influence of different cement spaces on the marginal gap of lithium disilicate crowns constructed by two scanner and milling unit combinations

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The influence of different cement spaces on the marginal gap of lithium disilicate crowns constructed by two scanner and milling unit combinations

Background

This study compared the marginal gaps of CAD/CAM lithium disilicate (LDS) crowns constructed using a contemporary and older scanner/milling unit combination at three different cement spaces.

Methods

Twenty-four undergraduate students prepared a Columbia model lower left first molar for an LDS crown in a simulated environment. From each crown preparation, one LDS crown was constructed using an E4D scanner/E4D milling unit (E4DS/E4DM) and TRIOS 3 scanner/Sirona inLab MC X5 milling unit (TRIO/MCX5) at cement space settings of 50, 100 and 200 μm. Each LDS crown was positioned onto the original crown preparation, and then a stereomicroscope was used to make three vertical marginal gap measurements at four locations (mid-buccal, mid-lingual, mid-mesial and mid-distal). The mean marginal gap (MMG) was calculated for each crown and each individual tooth surface.

Results

The MMGs of CAD/CAM LDS crowns constructed by TRIO/MCX5 were 72.31 at 50, 63.73 at 100 μm and 46.23 μm at 200 μm, which were smaller than E4DS/E4DM at each cement space.

Conclusions

Increasing the cement space decreased the MMG in both scanner/milling unit combinations. The smallest MMG was found using the newer scanner/milling unit at the 200 μm cement space. © 2024 Australian Dental Association.

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来源期刊

Australian dental journal 医学-牙科与口腔外科

CiteScore

4.20

自引率

4.80%

发文量

审稿时长

6-12 weeks

期刊介绍： The Australian Dental Journal provides a forum for the exchange of information about new and significant research in dentistry, promoting the discipline of dentistry in Australia and throughout the world. It comprises peer-reviewed research articles as its core material, supplemented by reviews, theoretical articles, special features and commentaries.