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Completed

NCT Number: NCT07491770

Clinical Assessment of Viscosity-Modified Composite Resins: Preheated, Sonic Activated, and Flowable Resins in Class V Restorations

The purpose of the 12-month clinical study was to evaluate and compare preheated, sonic-activated, and flowable composite resins used in Class V restorations.

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Key information

Age range

25 year–40 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Restorative Department, Faculty of Dentistry, Tanta University

Tanta, 31527, Egypt

About this study

Because of their superior aesthetics, minimal preparation needs, and capacity to adhere to tooth structure, resin composite materials are now frequently utilized in restorative dentistry. Materials with superior mechanical qualities, better handling qualities, and improved clinical performance have been developed as a result of ongoing advancements in composite technology. Viscosity-modulated composite resins have drawn a lot of interest among these developments because they seek to maximize cavity wall adaptability while preserving adequate strength and wear resistance. To enhance the therapeutic performance of composite resins, various methods have been developed to alter their viscosity. One method for improving flow and adaptability to cavity walls prior to polymerization is preheating composite resins, which momentarily lowers viscosity. Sonic-activated composite methods reduce viscosity during installation by using sonic energy, which makes cavity adaption and handling easier. Moreover, highly filled flowable composite resins have been created to increase their mechanical strength in comparison to traditional flowable composites by combining the better flow properties of flowable materials with increased filler content. Thus, the goal of this study was to assess the clinical performance of flowable composite resins that are warmed, sonic-activated, and highly filled when employed in Class V cavities.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Good general and oral health
  • Vital teeth
  • Class V cavities with depth ranging from 2 to 3 mm

Exclusion criteria

  • Non-vital or restored teeth
  • Para functional habits (e.g., bruxism)
  • pregnancy

Treatment and study plan

Preheated Nanohybrid Composite Resin (x tra fill)

Other

A nanohybrid composite resin preheated prior to placement to improve flowability and adaptation in Class V restorations

Sonic-Activated Nanohybrid Composite Resin (SonicFill 2®, Kerr, USA)

Other

A sonic-activated bulk-fill nanohybrid composite (SonicFill 2®) that reduces viscosity during placement using sonic energy.

Highly Filled Flowable Composite Resin (G-aenial Universal Flo®, GC Corporation, Japan)

Other

A highly filled flowable composite (G-aenial Universal Flo®) with improved mechanical properties compared to conventional flowables

Conventional Nanohybrid Composite Resin (NanoPaq®, Germany)

Other

A standard nanohybrid composite (NanoPaq®) used according to manufacturer instructions without modification

Primary outcomes

  1. The primary outcome was marginal adaptation

    Time frame: 12 months

    Clinical assessment of marginal adaptation was carried out in accordance with the World Dental Federation (FDI) criteria by two calibrated examiners at baseline and after 6, 9, and 12 months. The restorations were graded based on their compliance with the evaluation criteria as follows: score 1 (clinically excellent), score 2 (clinically satisfactory), score 3 (clinically acceptable), and scores 4 and 5 (clinically unsatisfactory). Clinical success was considered when restorations received scores of 1, 2, or 3, whereas scores of 4 or 5 were regarded as failures. Visual examination of the evaluated parameters was performed using a high-intensity light source, and a magnifying dental loupe was used to enhance observation. Intragroup comparisons of restoration outcomes across different follow-up intervals were analyzed using the Friedman test. Intergroup comparisons among the different restorative materials within the same follow-up period were performed using the Kruskal-Wallis test. T

Sponsors and collaborators

Lead sponsor

Tanta University

Other

Registry information

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Mar 24, 2026
Registry last updated
Mar 24, 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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