Clinical Assessment of Color Stability and Patient Satisfaction for Polished Versus Glazed Lithium Disilicate Glass Ceramic Restorations and Patient Satisfaction

Not Applicable

• Conditions: Color Change of Lithium Disilicate Crowns
• Interventions: Other: glazed lithium disilicate crowns; Other: polished lithium disilicate crowns

• Registration Number: NCT03696641
• Lead Sponsor: Cairo University

Brief Summary

Dental overglaze is consist of colorless glass powder and applied to the fired crown surface to provide a glossy surface,Adjustment procedure break the production of the glaze layer through a natural glaze or overglaze process and create a rough surface, glazing or polishing after adjustment procedures is important to enhance the appearance of the restoration

Detailed Description

Dental overglaze is consist of colorless glass powder and applied to the fired crown surface to provide a glossy surface. Natural glaze is a vitrified layer that is formed on the surface of the porcelain containing a glass phase when the porcelain is heated to a glazing temperature for a specific time, Adjustment procedure break the production of the glaze layer through a natural glaze or overglaze process and create a rough surface, The color of porcelain restorations is affected by surface roughness because rough surface reflects light irregularly and less than a glazed surface . Therefore, glazing or polishing after adjustment procedures is important to enhance the appearance of the restoration .

Although glazed surfaces appeared whiter, the CIE L\* value measured with the specular component excluded (SCE) geometry was lower than that of polished surfaces (28).Several reports have investigated different polishing techniques that support the use of polishing as an alternative for glazing of ceramic restorations .

Polishing can reduce chair time, eliminates laboratory procedures, infection control may be obtained . Polishing is also important for the porcelain surface for esthetic so several different techniques have been described for repolishing porcelain surfaces in the mouth .

Study Timeline

• Status Verified: 2018-10
• Study First Submitted: 2018-10-03
• 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: 2018-11-01
• Primary Completion: 2019-11-01
• Study Completion: 2019-11-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• All subjects are required to be:

  1. From 18-50 years old, be able to read and sign the informed consent document.
  2. Physically and psychologically able to tolerate conventional restorative procedures
  3. have no active periodontal or pulpal diseases, have teeth with good restorations
  4. Willing to return for follow-up examinations and evaluation

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Exclusion Criteria

• 1. Patients in the growth stage with partially erupted teeth 2. Patients with poor oral hygiene and motivation 3. Pregnant women's 4. Psychiatric problems or unrealistic expectations

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
glazed IPS e.max	polished lithium disilicate crowns	lithium disilicate glazed crowns that proved to have a good color stability
polished IPS e.max	polished lithium disilicate crowns	polished lithium disilicate crowns with the polishing kit
glazed IPS e.max	glazed lithium disilicate crowns	lithium disilicate glazed crowns that proved to have a good color stability
polished IPS e.max	glazed lithium disilicate crowns	polished lithium disilicate crowns with the polishing kit

Primary Outcome Measures

Name	Time	Method
color stability	one year	L\* a\* b\* values and ∆E

Secondary Outcome Measures

Name	Time	Method
patient satisfaction	one year	patient satisfaction through a questionnaire