Identifying marginal adaptation discrepancies of lithium disilicate crowns using seven different vertical X-ray angulations.

IF 3.4 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry Pub Date : 2024-09-22 DOI:10.1111/jopr.13945

Luiz Carvalho, Ryan Becker, Udochukwu Oyoyo, Dwight D Rice, Mathew T Kattadiyil

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引用次数: 0

Abstract

Purpose: To study the effect of different vertical angulations on the ability to radiographically assess vertical marginal discrepancies of lithium disilicate crowns.

Materials and methods: Twenty-one lithium disilicate crowns were fabricated for three different prepared natural teeth: incisor, canine, and premolar. Vertical marginal discrepancies ranging from 0 to 300 µm were intentionally created. The seated crowns were radiographed using seven different vertical angulations, totaling 147 images. Thirty experienced evaluators scored each image for marginal discrepancy, and values were statistically analyzed.

Results: Significant differences in the ability to accurately assess marginal discrepancies from radiographs were observed for the study factors of angulation, tooth type, and degree of marginal discrepancy (p < 0.001).

Conclusions: The radiographic interpretation of the marginal discrepancies of lithium disilicate crowns is significantly affected by the dimension of the marginal discrepancy. Specifically on premolar crowns, it is significantly affected by different vertical angulations of the X-ray beam. When evaluating marginal discrepancy on lithium disilicate crowns radiographically, vertical beam angulation within ±10° to the cemento-enamel junctionCEJ plane is recommended.

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使用七种不同的垂直 X 射线角度识别二硅酸锂冠的边缘适应差异。

目的：研究不同的垂直角度对通过X光评估二硅酸锂冠垂直边缘差异能力的影响：为门牙、犬齿和前磨牙这三种不同的天然牙齿制作 21 个二硅酸锂冠。刻意制造的垂直边缘差异从 0 微米到 300 微米不等。使用七种不同的垂直角度对就位牙冠进行射线照相，共拍摄了 147 张图像。30 位经验丰富的评估员对每张图像的边缘差进行评分，并对评分值进行统计分析：结果：在角度、牙齿类型和边缘差异程度等研究因素方面，从射线照片中准确评估边缘差异的能力存在显著差异（p < 0.001）：结论：对二硅酸锂牙冠边缘差的放射影像学解释受到边缘差尺寸的显著影响。特别是在前磨牙冠上，X 射线光束的不同垂直角度对其影响很大。在对二硅酸锂牙冠的边缘差进行X光片评估时，建议将X光束垂直于牙本质-釉质交界处CCEJ平面的角度控制在±10°以内。

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

Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

7.90

自引率

15.00%

发文量

171

审稿时长

6-12 weeks

期刊介绍： The Journal of Prosthodontics promotes the advanced study and practice of prosthodontics, implant, esthetic, and reconstructive dentistry. It is the official journal of the American College of Prosthodontists, the American Dental Association-recognized voice of the Specialty of Prosthodontics. The journal publishes evidence-based original scientific articles presenting information that is relevant and useful to prosthodontists. Additionally, it publishes reports of innovative techniques, new instructional methodologies, and instructive clinical reports with an interdisciplinary flair. The journal is particularly focused on promoting the study and use of cutting-edge technology and positioning prosthodontists as the early-adopters of new technology in the dental community.