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NCT Number: NCT07088029

Assessment of Occlusal Veneer Restorations Performance in Posterior Teeth

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.

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This study is active but is not currently recruiting participants.

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Key information

Conditions

Restoration of Posterior Teeth Occlusal Veneers on Posterior Teeth

Age range

25 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Faculty of Dentistry, Ain Shams University

Cairo, Heliopolis, 4393005, Egypt

About this study

Occlusal veneers are restorations that restore the occlusal surface without axial wall involvement, allowing restoration of form, function, and esthetics of compromised or destroyed occlusal tooth structure in a conservative way as part of their treatment plan and the restorative process. The performance of occlusal veneer restorations is of paramount importance, as it determines the outcome and behavior of the final restoration. No ideal study has been conducted to evaluate teeth restored with occlusal veneer restorations. Evaluation must include all aspects of clinical performance, as some of the materials used in their fabrication have not been fully studied and should be studied to evaluate their clinical behavior using modified USPHS (United States Public Health Service) criteria. Which includes surface texture, anatomical form/wear, marginal integrity, marginal discoloration, secondary caries, color match and post-operative hypersensitivity.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Normal occlusion
  • 25-35 years old
  • Males or females having class II cavities indicated for occlusal veneers

Exclusion criteria

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

Treatment and study plan

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.

Other names: 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.

Other names: Occlusal Veneer of Composite resin

Primary outcomes

  1. Clinical assessment

    Time frame: 1 year follow up

    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.

Sponsors and collaborators

Lead sponsor

Ain Shams University

Other

Registry information

Official study title

"Assessment of Occlusal Veneer Restorations Performance in Posterior Teeth Under Various Simulated Loading Conditions." (A 3D Finite Element Analysis Study)

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Jul 28, 2025
Registry last updated
Feb 11, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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