Wear of Enamel Antagonist to ZLS Crowns (zls)

June 3, 2021 updated by: Ibrahim Sameh Rady, Cairo University

Wear of Enamel Antagonist to Polished Versus Glazed Zirconia Reinforced Lithium Silicate Crowns (Randomized Clinical Trial)

The aim of this study is to evaluate the antagonist enamel wear of two processing options of Celtra duo crowns (polished and glaze fired) restoring posterior teeth in comparison with sound enamel wear at baseline and 6 months

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Adhesive dental ceramics have proven to guarantee optimal esthetic results alongside satisfactory mechanical properties. Due to these qualities, today they are considered the first-choice restorative materials both for minimal restorations and for the reconstruction of severely compromised teeth. Gold alloy reconstructions preferred in the past, especially for their optimal wear properties, have been progressively substituted by these new materials.

Loss of hard tooth substance is a natural process taking place during mastication. Also, Increased wear is a common reason of failure for restorations exposed to masticatory forces. Excessive wear may be responsible for numerous problems, such as hypersensitivity, loss of occlusal contact, defects of the periodontium, reduction of masticatory efficiency, tooth migration and wrong tooth relations, weakness of masticatory muscles, and changes in the vertical and horizontal jaw relations, which may cause functional and esthetic impairments.

An optimal restorative material should provide similar characteristics to natural dental tissues. The physiological wear of enamel and dentin should represent the reference for a reasonable wear pattern of restorative materials The manufacturers tend to improve the mechanical behavior of their products leads to the progressive offer of new ceramics for daily practice. Assessment of their wear behavior and comparison through detailed tests become necessary at this point.

comparing the wear of enamel opposing polished zirconia, polished lithium disilicate crowns opposing to natural tooth. Patients were recalled after 1year and impression were recorded with opposing arch and baseline and final cast were scanned and superimposed using 3 D scanner. They found that the mean of occlusal wear of the antagonistic enamel of polished zirconia was 42.0 μm, Enamel wear against natural antagonist (control group) 34.68 μm, whereas, for Enamel wear against polished lithium disilicate crowns (group 2) 40.06 μm Enamel wear against natural antagonist (control group) 35.09 μm.

studying the quality of CAD/CAM fabricated single tooth restorations (Ten zirconia restorations were compared to 12 metal ceramic and 10 lithium disilicate counterparts). They found that were no significant differences between the studied crown systems. No difference of the gingival response among the different crown systems. Eighty percent of zirconia crowns needed no occlusal adjustment; also it showed the least amount of marginal discrepancy.

Study Type

Interventional

Enrollment (Anticipated)

26

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

21 years to 50 years (ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Pt aged 21-60 years old, be able to read and sign the informed consent document.
  • Psychologically and physically able to withstand conventional dental procedures.
  • Patients needing posterior full coverage restorations
  • Patients with sound natural antagonists.
  • Have no active periodontal or pulpal diseases
  • Able to attend punctually for preplanned visits and evaluation.

Exclusion Criteria:

  • Patients with poor oral hygiene, high caries risk and uncooperative patients.
  • Pregnant women.
  • Psychiatric problems or unrealistic expectations.
  • Lack of opposing dentition in the area of interest.
  • Restored occlusal surface opposing the planned restoration.
  • The presence of a removable or fixed orthodontic appliance.
  • Patients with parafunctional habits.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: TREATMENT
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: DOUBLE

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
ACTIVE_COMPARATOR: monolithic glazedcrowns
glazed Celtra due crowns
Other: glazed zirconium lithium silicate
monolithic glazed crown
Other Names:
  • glazed Celtra due
EXPERIMENTAL: monolithic polished crowns
polished Celtra due crowns
Other: polished zirconium lithium silicate
monolithic polishedcrowns
Other Names:
  • polished Celtra due

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
antagonist enamel wear
Time Frame: 6 months

Intraoral digital scanner and superimposition software Mm3

intraoral scanning of enamel antagonist to determine amount of wear in Mm3
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Cairo University

Investigators

  • Principal Investigator: Eman M Anwer, professor, professor of fixed prosthodontics
  • Study Director: karim Abo Bakr Mohamed, PhD, teacher of fixed prosthodontics

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (ANTICIPATED)

July 10, 2021

Primary Completion (ANTICIPATED)

January 1, 2022

Study Completion (ANTICIPATED)

July 1, 2022

Study Registration Dates

First Submitted

May 29, 2021

First Submitted That Met QC Criteria

June 3, 2021

First Posted (ACTUAL)

June 7, 2021

Study Record Updates

Last Update Posted (ACTUAL)

June 7, 2021

Last Update Submitted That Met QC Criteria

June 3, 2021

Last Verified

June 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Wear & ZLS

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Wear, Tooth

Clinical Trials on glazed zirconium lithium silicate

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Mozambique

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe