Flexural strength and surface hardness of nanocomposite denture base resins.

Autor: Waghmare A; Department of Prosthodontics and Crown & Bridge, VYWS Dental College and Hospital, Amravati, Maharashtra, India., Nair C; Department of Prosthodontics and Crown and Bridge, Institute of Dental Sciences, Bareilly, India., Shukla AK; Department of Dentistry, Dr Laxmi Narayan Pandey Government Medical College Ratlam, Madhya Pradesh, India., Chaturvedi M; Department of Dental Research Cell, Dr. D. Y. Patil Dental College and Hospital, Dr. D. Y. Patil Vidyapeeth, Sant-Tukaram Nagar, Pimpri, Pune, 411018, India., Bhagat TV; Prosthetics Dental Sciences, College of dentistry, Prince Sattam Bin Abdulaziz University Alkharj, Saudi Arabia., Alsubaiy EF; Department of Prosthetic Dentistry, College of Dentistry King Khalid University, Abha, Saudi Arabia., Suleman G; Department of Prosthetic Dentistry, College of Dentistry King Khalid University, Abha, Saudi Arabia., Khader MA; Division of Periodontics, Department of PCS, College of Dentistry King Khalid University Abha, Saudi Arabia., Chaturvedi S; Department of Prosthetic Dentistry, College of Dentistry King Khalid University, Abha, Saudi Arabia.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Nov 15; Vol. 10 (22), pp. e40442. Date of Electronic Publication: 2024 Nov 15 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e40442
Abstrakt: Purpose: Higher bending forces during chewing and occlusal loading can lead to the deformation of denture bases. Roughness and microbial adhesion can be the result of improper care of the denture. Many attempts have been made to improve the properties of denture bases through the addition of different materials. The present study aimed to evaluate the surface hardness and flexural strength (FS) of newly formulated nanocomposite denture base resin made by adding zinc oxide (ZnO) and titanium dioxide (TiO 2 ) nanoparticles in heat polymerized polymethyl methacrylate resin in concentrations of 1 % and 2 %.
Methods: Rectangular metal master dies of dimension 65mm × 10mm × 3.3 mm for flexural strength and 30mm × 10mm × 3 mm for surface hardness were made. These dies were duplicated in 120 acrylic resin samples. These samples were divided into five groups in which group I is control group samples in conventional resin and group II,III, IV &V contained 1 % and 2 % concentrations of ZnO & TiO 2 nanoparticles in heat cure acrylic resin. The processing and finishing of the models were done. Flexural strength was measured using a universal testing machine and surface hardness using a Rockwell hardness testing machine.
Results: The minimum SH reported was 101.7 HRM while FS was 81.1 MPa and maximum was 118.7 HRM and 131.8 MPa respectively. The results showed that group IV containing 1 % TiO 2 nanoparticles showed the highest surface hardness values whereas the flexural strength was highest in group II containing 1 % ZnO nanoparticles. The analysis of variance showed a p value of <0.001 which was statistically highly significant.
Conclusion: Nanocomposite denture base resins modified with ZnO & TiO 2 nanoparticles have more flexural strength and surface hardness than conventional denture base resin.
Clinical Implication: The hardness of a denture base material can be increased by adding these nanoparticles for long term use in oral cavity and in cases prone to denture fracture.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2024 The Authors.)
Databáze: MEDLINE
Externí odkaz: