Nagore Arroyo-Lamas1, Iciar Arteagoitia2, Unai Ugalde3. 1. Medicine and Surgery Program, PhD School, University of the Basque Country UPV/EHU, Leioa, 48940 Bizkaia, Spain. 2. Maxillofacial Group, Stomatology Department, BioCruces Health Research Institute, University of the Basque Country UPV/EHU, Leioa, 48940 Bizkaia, Spain. 3. APERT Research Group, Department of Electronic Technology, University of the Basque Country, Bilbao, 48013 Bizkaia, Spain.
Abstract
Organic contaminants significantly limit the bioactivity of titanium implants, resulting in the degradation known as the ageing of titanium. To reactivate the surfaces, they can be photofunctionalized, i.e., irradiated with C-range ultraviolet (UVC) light. This descriptive in vitro study compares the effectiveness of novel light-emitting diode (LED) technology to remove contaminant hydrocarbons from three different commercially available titanium dental implants: THD, TiUnite, and SLA. The surface topography and morphology were characterized by scanning electron microscopy (SEM). The chemical compositions were analyzed by X-ray photoelectron spectroscopy (XPS), before and after the lighting treatment, by a pair of closely placed UVC (λ = 278 nm) and LED devices for 24 h. SEM analysis showed morphological differences at the macro- and micro-scopic level. XPS analysis showed a remarkable reduction in the carbon contents after the UVC treatment: from 25.6 to 19.5 C at. % (carbon atomic concentration) in the THD; from 30.2 to 20.2 C at. % in the TiUnite; from 26.1 to 19.2 C at. % in the SLA surface. Simultaneously, the concentration of oxygen and titanium increased. Therefore, LED-based UVC irradiation decontaminated titanium surfaces and improved the chemical features of them, regardless of the kind of surface.
Organiccontaminants class="Chemical">significantly limit the bioacclass="Chemical">pan class="Chemical">tivity of titanium implants, resulting in the degradation known as the ageing of titanium. To reactivate the surfaces, they can be photofunctionalized, i.e., irradiated with C-range ultraviolet (UVC) light. This descriptive in vitro study compares the effectiveness of novel light-emitting diode (LED) technology to remove contaminant hydrocarbons from three different commercially available titanium dental implants: THD, TiUnite, and SLA. The surface topography and morphology were characterized by scanning electron microscopy (SEM). The chemical compositions were analyzed by X-ray photoelectron spectroscopy (XPS), before and after the lighting treatment, by a pair of closely placed UVC (λ = 278 nm) and LED devices for 24 h. SEM analysis showed morphological differences at the macro- and micro-scopic level. XPS analysis showed a remarkable reduction in the carbon contents after the UVC treatment: from 25.6 to 19.5 C at. % (carbon atomic concentration) in the THD; from 30.2 to 20.2 C at. % in the TiUnite; from 26.1 to 19.2 C at. % in the SLA surface. Simultaneously, the concentration of oxygen and titanium increased. Therefore, LED-based UVC irradiation decontaminated titanium surfaces and improved the chemical features of them, regardless of the kind of surface.
Authors: Tord Berglundh; Gary Armitage; Mauricio G Araujo; Gustavo Avila-Ortiz; Juan Blanco; Paulo M Camargo; Stephen Chen; David Cochran; Jan Derks; Elena Figuero; Christoph H F Hämmerle; Lisa J A Heitz-Mayfield; Guy Huynh-Ba; Vincent Iacono; Ki-Tae Koo; France Lambert; Laurie McCauley; Marc Quirynen; Stefan Renvert; Giovanni E Salvi; Frank Schwarz; Dennis Tarnow; Cristiano Tomasi; Hom-Lay Wang; Nicola Zitzmann Journal: J Clin Periodontol Date: 2018-06 Impact factor: 8.728