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Polymer Mixtures for Experimental Self-Limited Dental Burs Development-A Preliminary Approach (Part 1)
Radu Marcel Chisnoiu1, Alexandrina Muntean2, Ovidiu Păstrav1
1Department of Odontology, Endodontics and Oral Pathology, "Iuliu Hațieganu" University of Medicine and Pharmacy, 33 Moților Street, 400001 Cluj-Napoca, Romania.
Researchers developed novel polymer mixtures for dental burs to remove caries effectively. The Bis-phenol A diglycidyl ether dimethacrylate/Polymethyl methacrylate/Methyl methacrylates (Bis-GMA/PMMA/MMA) mixtures showed promising mechanical properties for dental applications.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Conventional metallic dental burs can cause excessive loss of sound tooth tissue during caries removal.
- Developing alternative materials for dental burs is crucial for preserving healthy tooth structure.
- Polymeric materials offer potential for improved biocompatibility and controlled cutting properties.
Purpose of the Study:
- To develop and evaluate novel polymer mixtures for creating effective polymeric dental burs.
- To assess the mechanical properties, water sorption, solubility, and microstructure of experimental polymer mixtures.
- To investigate the impact of nanoparticle incorporation on the performance of these polymer mixtures.
Main Methods:
- Four polymer mixtures were formulated using Bis-phenol A diglycidyl ether dimethacrylate (Bis-GMA) with Triethylene glycol dimethacrylate/Urethane dimethacrylates (R1, R2) or Polymethyl methacrylate/Methyl methacrylates (R3, R4).
- Nanoparticles (5% glass with BaF2 and 0.5% graphene with silver particles) were incorporated into the polymer matrices.
- Key properties including compressive strength, diametrical compression, flexural strength, water sorption, and solubility were assessed.
- Statistical analysis was performed using the One-Way ANOVA test.
Main Results:
- Mixtures R3 and R4 (Bis-GMA/PMMA/MMA) exhibited superior compressive strength and diametrical compression values compared to R1 and R2.
- The addition of glass and graphene nanoparticles further enhanced the compressive and diametrical compression strengths.
- Incorporation of glass particles significantly increased flexural strength.
- Sample R3 showed notable differences in water sorption over time, and solubility varied across different intervals.
Conclusions:
- The Bis-GMA/PMMA/MMA polymer mixtures demonstrate suitable mechanical characteristics for potential use in self-limiting dental burs.
- Nanoparticle reinforcement enhances the mechanical performance of these polymer mixtures.
- Further research is warranted to evaluate the efficacy and safety of these experimental polymer burs in clinical applications for caries removal.
