Beta
294226

Influence of Hydrofluoric Acid Concentration And Etching Time On Pull Off of Lithium-Disilicate Glass Anterior Crowns

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

Fixed Prosthodontics

Abstract

ABSTRACT
Aim: Is to evaluate the Influence of hydrofluoric acid concentration and etching time on pull off of lithium-disilicate glass anterior crowns.
Material and Methods: forty-five lithium disilicate (IPS e.max Cad) full coverage crowns were fabricated on prepared extracted human maxillary central incisors. The crowns (n=45) were divided into three groups (n=15) according to the hydrofluoric acid (HF) concentrations used for the cementation of these crowns to the teeth; I) HF 4.9%, 2) HF 9.6%, 3). HF 11%. Then each group was subdivided into three subgroups (A, B, C) according to etching time (20seconds ,35seconds&60seconds respectively). Each crown was cemented to the corresponding prepared tooth using an adhesive resin cement. Then, the whole crown tooth assembly were subjected to thermocycling (5°C - 55°C,5000 cycles,). A universal testing machine was used to assess pull-off test. Data were collected, tabulated and statistically evaluated.
Results: The results showed a statistically significant difference in the mean values of the pull off test between the groups regarding HF concentration. group 1 (4.9% hydrofluoric acid) (206.5 ± 13.1) ˂ group 2 (9.5% hydrofluoric acid) (244.1 ± 25.4) ˂ group 3 (11% hydrofluoric acid) (284.4 ± 13.5). For 9.6% and 11% HF acid concentrations, etching durations used in this study do not have a significant effect on the retention of lithium disilicate glass crowns. However, for 4.9% HF the retention means significantly increased with elevating the etching duration.

DOI

10.21608/edj.2023.184751.2393

Keywords

Hydrofluoric acid, lithium disilicate IPS e.max CAD, pull-off test

Authors

First Name

Mohamed

Last Name

kassem

MiddleName

Abdelsattar

Affiliation

Dentist at Assiut university hospital Assiut university. Demonstrator at fixed prosthodontic department at Badr University Assiut (BUA)

Email

m.kassem92@yahoo.com

City

Assiut

Orcid

0000-0002-5884-6557

First Name

Mohammed

Last Name

Shalaby

MiddleName

-

Affiliation

Associate professor of fixed prosthodontics, Faculty of Dentistry, Minia University

Email

m.m.shalaby1977@gmail.com

City

Giza

Orcid

0000-0003-2673-0397

First Name

mostafa

Last Name

mohamed

MiddleName

-

Affiliation

Lecturer of fixed prosthodontics, Faculty of Dentistry, Minia University

Email

dentist_mostafa@hotmail.com

City

Minia

Orcid

0000-0002-5958-4376

Volume

69

Article Issue

2

Related Issue

40704

Issue Date

2023-04-01

Receive Date

2023-01-02

Publish Date

2023-04-01

Page Start

1,285

Page End

1,296

Print ISSN

0070-9484

Online ISSN

2090-2360

Link

https://edj.journals.ekb.eg/article_294226.html

Detail API

https://edj.journals.ekb.eg/service?article_code=294226

Order

11

Type

Original Article

Type Code

254

Publication Type

Journal

Publication Title

Egyptian Dental Journal

Publication Link

https://edj.journals.ekb.eg/

MainTitle

Influence of Hydrofluoric Acid Concentration And Etching Time On Pull Off of Lithium-Disilicate Glass Anterior Crowns

Details

Type

Article

Created At

23 Dec 2024