Clinical Assessement of Glazed Versus Polished Lithium Disilicate Crowns in Surface Roughness and Enamel Antagonists Wear

Not Applicable

• Conditions: Tooth Decay
• Interventions: Other: polished emax Press

• Registration Number: NCT03696849
• Lead Sponsor: Cairo University

Brief Summary

It is believed that final glazing yields the most acceptable ceramic surfaces in terms of smoothness. However, since reglazing must be performed in a dental laboratory with the use of a thermal furnace, it requires multiple office visits. Repeated firings have a destructive effect on ceramic surfaces and can cause deformation. Conversely, polishing is easy and simple and can be accomplished in a single session.

Detailed Description

Not available

Study Timeline

• Status Verified: 2018-10
• Study First Submitted: 2018-10-02
• Study First Submitted QC: 2018-10-03
• Last Update Submitted: 2018-10-03
• Study First Posted: 2018-10-05
• Last Update Posted: 2018-10-05
• Study Start: 2018-11
• Primary Completion: 2019-11
• Study Completion: 2020-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 28

Inclusion Criteria

• Patients from 18-50 years old who are able to read and sign the informed consent document.
• Physically and psychologically able to tolerate conventional restorative procedures.
• Have no active periodontal or pulpal diseases, have teeth with good restorations.
• Patients have no temporomandibular disorders.
• Each participant needed a crown on either a first or second premolar or first or second molar in any arch.
• Teeth selected shoud include:

restorability with a crown:root ratio of at least 1:1. presence of an opposing natural tooth which was non-restored or minimally restored.

the presence of two non-restored or minimally restored teeth opposing each other on the same quadrants as the crowned tooth and the opposing to serve as enamel controls. Minimally restored was defined as teeth which have no restoration greater than a Class II amalgam restoration.

• Willing to return for follow-up examinations and evaluation.

Exclusion criteria

• Patients in the growth stage with partially erupted teeth.
• Patients with poor oral hygiene and motivation.
• Pregnant women.
• Psychiatric problems or unrealistic expectations.
• Lack of opposite occluding dentition in the area intended for restoration.
• Patients with temporomandibular disorders.

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
glazed emax Press	polished emax Press	-
Polished emax Press	polished emax Press	-

Primary Outcome Measures

Name	Time	Method
Antagonists enamel wear using profilometer	1 year	wear of enamel antagonists opposing to emaxPress crowns that will be measured in um

Secondary Outcome Measures

Name	Time	Method
Restoration surface Roughness using profilometer	1 year	restoration roughness after different finishing methods that will me measured in um
Patient satisfaction	1 year	Questionnaire