Wear Behavior of Milled Posterior Crowns Fabricated From the New Monolithic Zirconia 5Y-TZP/3Y-TZP Compared to Lithium Disilicate

Cairo University (CU)

Status

Unknown

Conditions

Worn Posterior Teeth

Endodontically Treated Teeth

Posterior Teeth

Crowned Posterior Teeth

Treatments

Other: monolithic zirconia (5Y-TZP/3-YTZ) ZirCAD Prime.

Other: Lithium Dislicate IPS e.max crown

Study type

Interventional

Funder types

Other

Identifiers

NCT04805281

201020

Details and patient eligibility

About

In-vitro studies do not represent the actual masticatory environment and cannot simulate the intricate chewing pattern. Hence, there is a need for an in vivo study evaluating the wear potential of the newly introduced strength - color gradient multilayered zirconia IPS e.max ZirCAD Prime (5Y-TZP/3Y-TZP) and compare it to Lithium Disilicate IPS e.max CAD which has proven to have favorable wear patterns.

Full description

There will be no difference in wear caused by monolithic Zirconia (5Y-TZP/3Y-TZP) IPS E-max ZirCad Prime and Lithium Disilicate IPS e.max CAD to the antagonist.
There will be no difference in the wear of the new monolithic zirconia IPS e.max ZirCAD Prime and lithium disilicate IPS e.max CAD.

Enrollment

24 estimated patients

Sex

All

Ages

21 to 50 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

All subjects are required to:

1- Be aged 21-50 years old, be able to read and sign the informed consent document. 2- Psychologically and physically able to withstand conventional dental procedures.

3- Patients with mutilated posterior teeth indicated for full coverage restorations.

4- Patients with sound natural antagonists. 5- Able to attend punctually for preplanned visits and evaluation. 6- Have no active periodontal or pulpal diseases.

7- There should be no apparent loss or wear in opposing enamel.

Exclusion criteria

Patient with active resistant periodontal diseases.
Patients with parafunctional habits and bruxism.
Patients with poor oral hygiene, high caries risk and uncooperative patients. 3- Pregnant women.
Patients in the growth stage with partially erupted teeth. 5- Psychiatric problems or unrealistic expectations.

6- Lack of opposing dentition in the area of interest. 7- Restored occlusal surface opposing the planned restoration. 8- The presence of a removable or fixed orthodontic appliance.