Work

Influence of Resin Matrix Composition on the Flowability of Rice HuskDerived Nanohybrid Silica-Reinforced Dual-Cure Flowable Dental Composites

Year: 2026

Type: article

Abstract: Objectives: Flowability is a fundamental property of flowable resin composites that influences handling, injectability, and adaptation to cavity walls.This study aimed to develop biosustainable dual-cure flowable dental composites (DCFCs) reinforced with rice husk-derived nanohybrid silica and investigate the effect of resin matrix composition on their flowability.Methods: Experimental DCFCs were formulated using different proportions of urethane dimethacrylate (UDMA), bisphenol A-glycidyl methacrylate (Bis-GMA), and triethylene glycol dimethacrylate (TEGDMA), while maintaining a constant nanohybrid rice husk silica filler loading of 50 wt%.The materials were prepared as two-paste systems comprising separate light-curing and chemical-curing components to prevent premature polymerization.Flowability was evaluated using the drip test method by measuring the vertical flow distance under gravity.Data were analysed using one-way analysis of variance followed by post hoc multiple comparisons at a significance level of p < 0.05.Results: Resin matrix composition significantly affected flowability (p < 0.001).The U30T70 formulation exhibited the greatest flow distance (8.28 ± 0.03 mm), whereas B50T50 showed the lowest value (3.44 ± 0.07 mm).Increasing the proportion of TEGDMA enhanced flowability within both UDMA-and Bis-GMA-based formulations.Overall, UDMAcontaining composites demonstrated greater flowability than comparable Bis-GMA formulations.Several experimental composites exhibited flow characteristics comparable to the commercial dual-cure composite ParaCore SLOW.Conclusion: Experimental dual-cure flowable dental composites reinforced with rice husk-derived nanohybrid silica were successfully developed.Flowability was predominantly governed by resin matrix composition, with higher TEGDMA contents and UDMA-based formulations producing greater flow.These findings demonstrate the feasibility of utilising sustainable rice husk-derived silica in dual-cure flowable composites while achieving clinically relevant handling characteristics.

Source: International Journal of Drug Delivery Technology

DOI: 10.25258/ijddt.16.68s.146

Authors: Zartashia Arooj, Dasmawati Mohamad, Yanti Johari, Adam Husien, Matheel Al-Rawas

Institutions: Universiti Sains Malaysia, Management and Science University

Language: English

Topic: Dental materials and restorations

Subfield: General Dentistry

Field: Dentistry

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: bronze

Funder: Universiti Sains Malaysia