Two-Year Clinical Performance of Self-Cured Resin Composite in Comparison to Light-Cured Bioactive Resin Composite in Restoring Occlusal Cavities of Posterior Teeth.

Summary

Introduction: Resin composite restorations are among the most commonly used materials for restoring posterior teeth due to their aesthetic and mechanical properties. Self-cured resin composites have emerged as a promising option to overcome some of the limitations of conventional light-cured composites.

Aim: The aim of this study is to evaluate the effect of self-cured resin composite in restoring occlusal cavities of posterior teeth over a period of two years. The results will contribute to clarifying its efficiency and safety as a treatment option in daily clinical practice.

Research Steps: Fifty affected teeth will be selected and randomly allocated into groups.

Group (A): Self-cured resin composite group - self-cured resin composite will be used.

Group (B): Bioactive nano-hybrid resin composite group - bioactive nano-hybrid resin composite will be used.

The restorations will be evaluated after placement.

Introduction:

Resin composite restorations are among the most widely used materials in restorative dentistry due to their favorable aesthetic and physical properties. However, the success of these restorations largely depends on the type of material used and the technique of application. Conventional light-cured composites are the most common option, yet they may present certain limitations in cases where adequate isolation is difficult to achieve or in posterior areas of the mouth.

In contrast, self-cured resin composites have emerged as a promising alternative because of their ability to polymerize chemically without the need for a light source. These materials are characterized by ease of use and the possibility of application under limited clinical conditions, making them suitable in certain clinical situations.

Aim of the Study:

The aim of this randomized controlled clinical trial is to evaluate the clinical performance of a newly introduced self-cured resin composite (Stela, SDI, Australia) in class I occlusal cavities of posterior teeth compared to light-cured Nano-hybrid bioactive resin composite (Beautifill II, Shofu, Japan) regarding functional properties over a follow-up of 2 years.

Research Question:

Does the clinical performance of self-cured resin composite restorations differ from light cured nano-hybrid bioactive resin composite in class I cavities?

Conditions

• Composite Restoration

Interventions

PROCEDURE

Self Cured Composite

After cavity disinfection, the adhesive protocol system will be applied on the cavity and margins according to the manufacturer instructions using Stela primer then stela composite will be applied in single increment covering the margins. A period of 4 minutes is required till complete setting before starting finishing and polishing procedures

PROCEDURE

Bioactive Nano-hybrid composite

After cavity disinfection, Selective etching of enamel will be done using 37% phosphoric acid etch on all enamel margins after protection of dentin for 20 seconds followed by rinsing and dryness. Then, a universal adhesive will be applied using micro brush on all cavity (Enamel and Dentin). A gentle air blast will be done for the adhesive for 5 seconds then cured for 20 seconds according to the manufacturer instructions. A thin layer (1mm) of highly filled flowable composite will be applied on the cavity floor and distributed using the tip of the explorer then cured for 20 seconds according to the manufacturer instructions. Finally, nano hybrid composite will be packed incrementally following the tooth anatomy and each increment will be cured for 20 seconds according to the manufacturer instructions. For both groups sequential finishing and polishing will be done using red and yellow coded finishing stones, polishing tips and polishing paste according to the manufacturer instructions.

Sponsors & Collaborators

• British University In Egypt

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

50 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2026-01-01

Primary Completion

2026-02-01

Completion

2026-02-01

Countries

• Egypt

Study Locations