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

Cairo University (CU)

Status: Unknown

Conditions: Color Change of Lithium Disilicate Crowns

Treatments: Other: polished lithium disilicate crowns; Other: glazed lithium disilicate crowns

Study type: Interventional

Funder types: Other

Identifiers

NCT03696641

CEBD-CU-2018-09-25

Details and patient eligibility

About

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

Full 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 .

Enrollment: 20 estimated patients

Sex: All

Ages: 18 to 60 years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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20 participants in 2 patient groups

glazed IPS e.max

Active Comparator group

Description:

lithium disilicate glazed crowns that proved to have a good color stability

Treatment:

Other: glazed lithium disilicate crowns

Other: polished lithium disilicate crowns

polished IPS e.max

Experimental group

Description:

polished lithium disilicate crowns with the polishing kit

Treatment:

Other: glazed lithium disilicate crowns

Other: polished lithium disilicate crowns