Journal of Polymer & Composites Original Research Special issue

A Retrospective Analysis of Resin-Based Polymer Composites and Bioactive Glass-Polymer Hybrids Regarding Secondary Caries and Durability

  1. NajiyaV.P. Department of Orthodontics, Saveetha Dental College and Hospitals, Saveetha institute of medical and technical sciences, Saveetha university, 162, Poonamallee high road, Chennai
  2. Remmiya Mary Varghese Department of Orthodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Science, Saveetha University, Chennai
  3. Shrishti Kumawat Department of Conservative dentistry and Endodontics, Arya medical college and hospital, Omaxe City, Ajmer Road, Jaipur
  4. Charu Sharma Department of General Dentistry, Private Practitioner, Trusmile Dental Clinic, Chandkheda, Ahmedabad
  5. Gaini Mounika Department of Conservative dentistry and Endodontics. Narayana dental college and hospital, chintareddypalem, Nellore
  6. Mohan Rawat Department of Periodontics, KD Dental college, Mathura

Abstract

Aim- To compare the 2-year clinical survival and failure modes of a Resin-Based Polymer Composites and BioactiveGlass-Polymer Hybrids in Class I and II posterior restorations. Methods-A total of 550 restorations were placed in adult patients across various private dental practices in India to ensure a diverse clinical demographic. Teeth were randomly assigned and restored with either a hybrid composite (Te-Econom, IvoclarVivadent; n=275) or a Resin-Modified Glass Ionomer Cement (GC Gold Label 2 LC, GC Corp; n=275). Clinical performance was monitored over a 24-month period using Modified USPHS criteria. Statistical analysis of restoration survival was performed using Kaplan-Meier estimators, while the influence of material type on failure risk was determined via Cox regression models (p < 0.05). Results- At 2 years, the overall survival rate was higher for RC (95.6%) compared to RMGIC (91.3%), a difference approaching significance (p=0.054) RMGIC was significantly more prone to mechanical failure (fracture) than RC (4.0% vs. 0.7%; p=0.007). Conversely, RMGIC demonstrated a protective trend against biological failure, with lower incidence of secondary caries (1.5%) compared to RC (2.5%), though this did not reach statistical significance (p=0.306). Conclusion- While RMGIC demonstrated potential bioactive benefits in reducing secondary caries risk, its clinical longevity in load-bearing posterior teeth is compromised by lower fracture resistance. Conventional resin composite remains the mechanically superior choice for Class I and II restorations

Keywords

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