OBJECTIVES: To compare the adhesion of Streptococcus mutans to nickel titanium (NiTi) and copper-NiTi (Cu-NiTi) archwires and to correlate the adhesion to surface characteristics (surface free energy and surface roughness) of these wires. MATERIALS AND METHODS: A total of 16 patients undergoing orthodontic treatment with preadjusted edgewise appliances were included in the study. 0.016" and 0.016" × 0.022" NiTi and Cu-NiTi archwires in as-received condition and after 4 weeks of intraoral use were studied for S mutans adhesion using real-time polymerase chain reaction. Surface roughness and surface free energy were studied by three-dimensional surface profilometry and dynamic contact angle analysis, respectively. RESULTS: S mutans adhesion was more in Cu-NiTi archwires. These wires exhibited rougher surface and higher surface free energy when compared to NiTi archwires. CONCLUSIONS: S mutans adhesion, surface roughness, and surface free energy were greater in Cu-NiTi than NiTi archwires. Surface roughness and surface free energy increased after 4 weeks of intraoral exposure for all of the archwires studied. A predominantly negative correlation was seen between the cycle threshold value of adherent bacteria and surface characteristics.
OBJECTIVES: To compare the adhesion of Streptococcus mutans to nickel titanium (NiTi) and copper-NiTi (Cu-NiTi) archwires and to correlate the adhesion to surface characteristics (surface free energy and surface roughness) of these wires. MATERIALS AND METHODS: A total of 16 patients undergoing orthodontic treatment with preadjusted edgewise appliances were included in the study. 0.016" and 0.016" × 0.022" NiTi and Cu-NiTi archwires in as-received condition and after 4 weeks of intraoral use were studied for S mutans adhesion using real-time polymerase chain reaction. Surface roughness and surface free energy were studied by three-dimensional surface profilometry and dynamic contact angle analysis, respectively. RESULTS: S mutans adhesion was more in Cu-NiTi archwires. These wires exhibited rougher surface and higher surface free energy when compared to NiTi archwires. CONCLUSIONS: S mutans adhesion, surface roughness, and surface free energy were greater in Cu-NiTi than NiTi archwires. Surface roughness and surface free energy increased after 4 weeks of intraoral exposure for all of the archwires studied. A predominantly negative correlation was seen between the cycle threshold value of adherent bacteria and surface characteristics.
Entities:
Keywords:
Adhesion; Cu NiTi; NiTi; Roughness; S mutans
Authors: Rosa Amalia Nafarrate-Valdez; Rita Elizabeth Martínez-Martínez; Erasto Armando Zaragoza-Contreras; José Luis Áyala-Herrera; Rubén Abraham Domínguez-Pérez; Simón Yobanny Reyes-López; Alejandro Donohue-Cornejo; Juan Carlos Cuevas-González; Juan Pablo Loyola-Rodríguez; León Francisco Espinosa-Cristóbal Journal: Medicina (Kaunas) Date: 2022-06-30 Impact factor: 2.948
Authors: Nursel Arici; Berat S Akdeniz; Abdullah A Oz; Yucel Gencer; Mehmet Tarakci; Selim Arici Journal: Korean J Orthod Date: 2021-07-25 Impact factor: 1.372