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71553

The Influence of Finish-Line Curvature and Scanning Methods on the Marginal Fit of CAD/CAM Ceramic Crowns: An in-vitro study

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Last updated: 22 Jan 2023

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Abstract

Aim of the study: the purpose of this study was to evaluate the influence of finish line curvature and scanning methods on the marginal gap of CAD/CAM Ceramic crowns. Methodology: Forty-two crowns were fabricated from Vita mark II blocks using Cerec in Lab system, and divided into two main groups (21 each) according to the scanning method (direct and indirect scanning). Each group was divided into three subgroups (7 each) according to finish line curvature (1mm, 3mm, and 5mm). Optical impressions for direct group were taken for the dies directly using the Cerec scanner, but for indirect group; physical impression was taken for the dies then poured in stone which scanned by using the Cerec scanner. The completed crowns were cemented to the corresponding dies and the marginal gap was evaluated. The collected data was statistically analyzed using two-way ANOVA test and Post Hoc test and the significance level was set at p ≤ 0.05. There was no statistically significant difference (p ≤ 0.05) between subgroups of (1mm) and (3mm) curvature but there was statistically significant difference (p ≤ 0.05) between both subgroups of (1mm and 3mm) curvature and subgroup of (5mm) curvature. Conclusion: Finish line curvature more than 3mm has an effect on the marginal gap of Vita Mark II crowns. \

DOI

10.21608/ajdsm.2018.71553

Authors

First Name

Atef

Last Name

A. Ismail

MiddleName

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Affiliation

Demonstrator, Crown and Bridge Department, Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University.

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First Name

Hussein

Last Name

R. Mohammed

MiddleName

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Affiliation

Lecturer, Crown and Bridge Department, Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University.

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Orcid

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First Name

Hesham

Last Name

I. Othman

MiddleName

-

Affiliation

Professor, Crown and Bridge Department, Faculty of Dental Medicine, Boys, Cairo, Al-Azhar University.

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Volume

21

Article Issue

3

Related Issue

10890

Issue Date

2018-07-01

Receive Date

2020-02-17

Publish Date

2018-07-01

Page Start

245

Page End

251

Print ISSN

1110-6751

Online ISSN

2682-3314

Article File

AJDSM_Volume 21_Issue 3_Pages 245-251.pdf

PDF . 406.0kB

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https://ajdsm.journals.ekb.eg/article_71553.html

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https://ajdsm.journals.ekb.eg/service?article_code=71553

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Original Article

Type Code

848

Publication Type

Journal

Publication Title

Al-Azhar Journal of Dental Science

Publication Link

https://ajdsm.journals.ekb.eg/

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Article

Created At

22 Jan 2023