Work

Photocatalytic antimicrobial effect of titanium dioxide coated clear-aligners on Streptococcus mutans and evaluation the physico-mechanical characteristics

Year: 2025

Type: article

Abstract: BACKGROUND: coating on surface microhardness and optical transparency. MATERIALS AND METHODS: (1 %, 2 %, and 4 %) via submerging. Uniformity of particle distribution and surface microhardness were measured using scanning electron microscope (SEM) and Vickers hardness testing, respectively. Optical transparency was assessed via ultraviolet-visible spectrophotometry. After incubation in artificial saliva, samples were exposed to ultraviolet A (UVA) at 320 nm for 1 min with an energy density of 18.75 J/cm²). Biofilm inhibition was evaluated by crystal violet colorimetric assay, measuring optical density at 595 nm. Expression of gtfB gene was analyzed via quantitative real-time polymerase chain reaction. RESULTS: coating resulted in a significant reduction in optical transparency compared to other groups (P < 0.01). CONCLUSION: coating preserved aesthetics and still provided substantial antimicrobial activity, making it the more practical clinical option.

Source: Photodiagnosis and Photodynamic Therapy

DOI: 10.1016/j.pdpdt.2025.105235

Authors: Maryam Pourhajibagher, Rashin Bahrami, Mohammadreza Moeininejad, Roghayeh Ghorbanzadeh, Abbas Bahador

Institutions: Tehran University of Medical Sciences, Iran University of Medical Sciences, Shahed University

Language: English

Topic: Dental materials and restorations

Subfield: Orthodontics

Field: Dentistry

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $2,610