NCT07521501

Clinical Behavior and Patient Satisfaction of Zirconia-reinforced Glass-ceramic Crowns and Ultra-translucent-multilayered Monolithic Zirconia Crowns With a Conservative Marginal Design

Clinical Behavior and Patient Satisfaction of Zirconia-reinforced Glass-ceramic Crowns and Ultra-translucent-multilayered Monolithic Zirconia Crowns With a Conservative Marginal Design (A Randomized Controlled Clinical Trial)

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 20 (estimated)
• Sponsor: Cairo University · Academic / Other
• Sex: All
• Age: 21 Years – 50 Years
• Healthy volunteers: Not accepted

Summary

The aim of the present study is to evaluate clinical behavior and patient satisfaction of Zirconia-reinforced lithium disilicate press ceramic crowns when used in a conservative marginal design(0.6mm chamfer finish line). Comparison with Ultratranslucent multilayered monolithic zirconiacrowns will also be carried out in terms of marginal integrity, fracture, color stability and gingival health for 12 month

Detailed description

* Select and examine patients based on inclusion/exclusion criteria, then obtain consent. * Diagnose chief complaint, assess teeth in the esthetic zone, and perform scaling/polishing. * Take primary impressions for study casts. * Instruct patients to brush three times daily for good oral hygiene. * Capture pre-op photos and radiographs. * Choose the appropriate shade. * Tooth Preparation: * Group 1: Ultra-translucent zirconia crown (CAD/CAM, 0.6mm chamfer). * Group 2: Zirconia-reinforced lithium disilicate crown (press, 0.6mm chamfer). * Perform tissue retraction and take impressions with IOS. * Create provisional crowns. * Fabricate crowns (AMBRIA or KATANA zirconia) per manufacturer guidelines. * Conduct try-in. * Cement using light-cured resin adhesive. * Assess restoration at 3, 6, 9 and 12 months for clinical behavior and patient satisfaction

Conditions

• Clinical Behavior of ZLS and UTML

Interventions

Type	Name	Description
DEVICE	UTML (KATANA) crowns with conservative marginal design	Monolithic zirconia (KATANA UTML) crown fabricated with CAD/CAM and a conservative 0.6 mm marginal design.
DEVICE	ZLS (AMBRIA) crowns with conservative marginal design	Zirconia-reinforced lithium silicate press ceramic (Ambria) crown with conservative 0.6 mm marginal design.

Timeline

• Start date: 2026-06-01
• Primary completion: 2027-07-01
• Completion: 2027-07-01
• First posted: 2026-04-13
• Last updated: 2026-04-13