Assessment of Occlusal Veneer Restorations Performance in Posterior Teeth

NCT07088029 | Active Not Recruiting

• 1 other identifier: FDASU-Rec ID042514
• Study Type: interventional
• Target: 8
• Locations: 1 country
• Sites: 1

Brief Summary

The aim of the research is to study the mechanical behavior and clinical performance of veneers in posterior teeth. Clinical assessment and experimentation of two types of occlusal veneers will be conducted to evaluate their behavior.

Conditions

Restoration of Posterior Teeth; Occlusal Veneers on Posterior Teeth

Keywords

occlusal veneer; direct occlusal veneer; clinical validation study; split-mouth clinical trial

Outcome Measures

Primary Outcomes (1)

• Clinical assessment

  Clinical performance of each direct \& indirect occlusal veneer using modified USPHS (United States Public Health Service) criteria. Each criterion will be graded as either Alpha, Bravo and Charlie. * Surface texture: aplha: smooth as surrounding enamel, beta: rougher than enamel, charlie: very rough * Anatomical wear; alpha: Restoration is continuous with existing tooth anatomy, bravo: Restoration is slightly discontinuous, charlie: restoration is discontinuous. * Marginal integrity: alpha: Closely adapted, beta: Visible crevice,, charlie Crevice in which dentin is exposed. * Marginal discoloration: alpha: No discoloration, bravo: Superficial staining , charlie: Deep staining. * Secondary caries: aplha: no caries, charlie: caries present. * Color match: aplha:No mismatch between restoration and tooth. bravo: Slight mismatch, charlie: unacceptable mismatch The clinical performance will be evaluated by blinded evaluators, the data will be collected in a table for analysis.

  1 year follow up

Study Arms (2)

Direct occlusal veneer ( Occlusal Veneer of Composite resin)

EXPERIMENTAL

Split-mouth design, (right/left posterior tooth) will be restored with an occlusal veneer composite resin (Direct occlusal veneer). Directly fabricated occlusal veneers are a conservative approach, however, it requires a great skill from the operator to assure good margins and occlusal anatomy. Direct veneers are fabricated from composite resin and can be finished in a single visit, but longer chair time is required, in addition to the low wear resistance compared to ceramics. However, direct occlusal veneers have the benefit of resiliency close to that of natural dental tissue.

Procedure: Direct occlusal veneer ( Occlusal Veneer of Composite resin)

Indirect occlusal veneer (Occlusal veneer of lithium disilicate)

ACTIVE COMPARATOR

Split-mouth design, (right/left posterior tooth) will be restored with an Indirect occlusal veneer (Occlusal veneer of lithium disilicate). Indirectly fabricated occlusal veneers of lithium disilicate allow better control and design of the occlusal anatomy and proximal contacts, in addition to possessing better mechanical properties and fracture strength when compared to direct occlusal veneers. However, indirect occlusal veneers are lab fabricated, consequently, more clinical visits are required.

Procedure: Indirect occlusal veneer (Occlusal veneer of lithium disilicate)

Interventions

Indirect occlusal veneer (Occlusal veneer of lithium disilicate) PROCEDURE

Split-mouth design, (right/left posterior tooth) will be restored with an Indirect occlusal veneer (Occlusal veneer of lithium disilicate). Indirectly fabricated occlusal veneers of lithium disilicate allow better control and design of the occlusal anatomy and proximal contacts, in addition to possessing better mechanical properties and fracture strength when compared to direct occlusal veneers. However, indirect occlusal veneers are lab fabricated, consequently, more clinical visits are required.

Also known as: Occlusal veneer of lithium disilicate

Indirect occlusal veneer (Occlusal veneer of lithium disilicate)

Direct occlusal veneer ( Occlusal Veneer of Composite resin) PROCEDURE

Split-mouth design, (right/left posterior tooth) will be restored with an occlusal veneer composite resin (Direct occlusal veneer). Directly fabricated occlusal veneers are a conservative approach, however, it requires a great skill from the operator to assure good margins and occlusal anatomy. Direct veneers are fabricated from composite resin and can be finished in a single visit, but longer chair time is required, in addition to the low wear resistance compared to ceramics. However, direct occlusal veneers have the benefit of resiliency close to that of natural dental tissue.

Also known as: Occlusal Veneer of Composite resin

Direct occlusal veneer ( Occlusal Veneer of Composite resin)

Eligibility Criteria

• Age: 25 Years - 35 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• Normal occlusion
• years old
• Males or females having class II cavities indicated for occlusal veneers

You may not qualify if:

• Parafunctional habits
• Abnormal occlusion
• Extremely high caries risk patients
• Temporomandibular problems

Sponsors & Collaborators

• Ain Shams University: lead

Study Sites (1)

Faculty of Dentistry, Ain Shams University

Cairo, Heliopolis, 4393005, Egypt

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: Split-mouth design, one side (right/left posterior tooth) will be restored with a direct occlusal veneer (occlusal veneer of direct composite resin) and the other side (right/left posterior tooth) will restored with an indirect occlusal veneer (occlusal veneer of lithium disilicate).

Study Record Dates

• First Submitted: June 15, 2025
• First Posted: July 28, 2025
• Study Start: August 1, 2025
• Primary Completion: March 1, 2026
• Study Completion (Estimated): August 1, 2026
• Last Updated: February 11, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will not share

Locations

EG (1)