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

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

Study Overview

• Status: Unknown
• Conditions: Color Change of Lithium Disilicate Crowns
• Intervention / Treatment: Other: glazed lithium disilicate crowns; Other: polished lithium disilicate crowns

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 Type: Interventional
• Enrollment (Anticipated): 20
• Phase: Not Applicable

Contacts and Locations

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 60 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

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

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: glazed IPS e.max; lithium disilicate glazed crowns that proved to have a good color stability	Other: glazed lithium disilicate crowns; glazing of IPS e.max crowns; Other Names: glazed IPS e.max; Other: polished lithium disilicate crowns; polishing of IPS e.max crowns; Other Names: polished IPS e.max
Experimental: polished IPS e.max; polished lithium disilicate crowns with the polishing kit	Other: glazed lithium disilicate crowns; glazing of IPS e.max crowns; Other Names: glazed IPS e.max; Other: polished lithium disilicate crowns; polishing of IPS e.max crowns; Other Names: polished IPS e.max

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
color stability	L* a* b* values and ∆E	one year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
patient satisfaction	patient satisfaction through a questionnaire	one year

Collaborators and Investigators

• Sponsor: Cairo University

Study record dates

Study Major Dates

• Study Start (Anticipated): November 1, 2018
• Primary Completion (Anticipated): November 1, 2019
• Study Completion (Anticipated): November 1, 2019

Study Registration Dates

• First Submitted: October 3, 2018
• First Submitted That Met QC Criteria: October 3, 2018
• First Posted (Actual): October 5, 2018

Study Record Updates

• Last Update Posted (Actual): October 5, 2018
• Last Update Submitted That Met QC Criteria: October 3, 2018
• Last Verified: October 1, 2018

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Central Nervous System Depressants; Enzyme Inhibitors; Tranquilizing Agents; Psychotropic Drugs; Antidepressive Agents; Antimanic Agents; Lithium Carbonate
• Other Study ID Numbers: CEBD-CU-2018-09-25

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No