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78454

SPECTROPHOTOMETRIC ANALYSIS AND FRACTURE RESISTANCE OF SUPER AND ULTRA TRANSLUCENCY ZIRCONIA VERSUS LITHIUM DISILICAET GLASS CERAMICS

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Last updated: 01 Jan 2025

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Abstract

Purpose: To compare the translucency and fracture resistance of crowns fabricated using 3 different ceramic materials. Materials and Methods: A human maxillary right premolar was prepared to a 0.4 mm chamfer finish line, with 6 degrees convergence angle and 1.5 mm occlusal clearance. Using industrial silicon (Body Double, Smooth-On), a mold was poured to construct 20 identical resin dies. After scanning the resin dies, 10 ultratranslucency monolith zirconia (UTZ) crowns and 10 supertranslucency monolith zirconia (STZ) crowns were milled and sintered according to manufacturer directions. The same premolar was further prepared to a 0.6mm chamfer finish line, and 10 resin dies were constructed and scanned using same technique to perform ten IPS e.max crowns which were milled accordingly and sintered according to manufacturer directions. All specimens were tested for translucency using spectrophotometer (Nippon Densmoku industries). All specimens were then subjected to fracture resistance test using universal testing machine (The Testometric Company Limited), at cross head speed 0.5 mm/min, with force direction 90 degrees angle to the occlusal table, at the central fossa. Results: Viewing the mean of translucency between studied groups, group STZ scored the highest TP (21.03±4.41), followed by group UTZ (19.42±4.31), then group IPS e.max (19.29±4.49). Regarding mean fracture strength, group UTZ scored the highest value (1009.91±360.20 N) followed by group STZ (847.18±329.92 N) then group IPS e.max (821.51±175.69 N). One-way ANOVA revealed no significant difference between groups in either translucency (P=0.621) or fracture strength (P=0.328). Conclusions: The two tested hybrid ceramics could present an acceptable treatment option for fabricating monolith ceramic crowns. There was no significant difference in either translucency or fracture resistance between all tested groups.

DOI

10.21608/edj.2018.78454

Keywords

IPS e.max, ultratranslucency zirconia, supertranslucency zirconia, translucency, Fracture resistance

Authors

First Name

Sara

Last Name

Telyani

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Affiliation

Clinical instructor Oral Rehabilitation Sciences, Beirut Arab University, Faculty of Dentistry

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Orcid

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First Name

Esam

Last Name

Osman

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Affiliation

Professor of Dental Biomaterials, Beirut Arab University, Faculty of Dentistry

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Orcid

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First Name

Mohammad

Last Name

Rayyan

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Affiliation

Associate Professor of Prosthodontics, Beirut Arab University, Faculty of Dentistry, Assistant Professor of Fixed Prosthodontics, Faculty of Dentistry, Misr University for Science and Technology, Cairo, Egypt

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Orcid

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First Name

Ehab

Last Name

Farghaly

MiddleName

A.

Affiliation

Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Misr University for Science and Technology, Cairo, Egypt

Email

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City

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Orcid

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First Name

Ghada

Last Name

Hamza

MiddleName

E

Affiliation

Lecturer of Fixed and Removable Prosthodontics Department, Oral and Dental Research Division, National Research Center, Cairo, Egypt

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Volume

64

Article Issue

Issue 2 - April (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)

Related Issue

11448

Issue Date

2018-04-01

Receive Date

2020-03-22

Publish Date

2018-04-01

Page Start

1,647

Page End

1,652

Print ISSN

0070-9484

Online ISSN

2090-2360

Link

https://edj.journals.ekb.eg/article_78454.html

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https://edj.journals.ekb.eg/service?article_code=78454

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28

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Original Article

Type Code

254

Publication Type

Journal

Publication Title

Egyptian Dental Journal

Publication Link

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

MainTitle

SPECTROPHOTOMETRIC ANALYSIS AND FRACTURE RESISTANCE OF SUPER AND ULTRA TRANSLUCENCY ZIRCONIA VERSUS LITHIUM DISILICAET GLASS CERAMICS

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Article

Created At

22 Jan 2023