OBJECTIVE: To test the hypothesis that there are no differences in mutans streptococci (MS) adhesion between esthetic and metallic orthodontic arch wires based on their surface characteristics. MATERIALS AND METHODS: Surface roughness (Ra) and apparent surface free energy (SFE) were measured for six wires-four esthetic, one nickel-titanium (NiTi), and one stainless-steel (SS)-using profilometry and dynamic contact angle analysis, respectively. The amount of MS (Streptococcus mutans and Streptococcus sobrinus) adhering to the wires was quantified using the colony-counting method. The surfaces, coating layers, and MS adhesion were also observed by scanning electron microscopy. Statistical significance was set at P < .05. RESULTS: The Ra values of the esthetic wires were significantly different from one another depending on the coating method (P < .05). The NiTi wire showed the highest SFE, followed by the SS wire and then the four esthetic wires. The NiTi wires produced a significantly higher MS adhesion than did the SS wires (P < .05). The esthetic wires showed significantly lower MS adhesions than did the NiTi wire (P < .05). Pearson correlation analyses found moderate significant positive correlations between the SFE and the S mutans and S sobrinus adhesions (r = .636/.427, P < .001/P = .001, respectively). CONCLUSIONS: The hypothesis is rejected. This study indicates that some esthetic coatings on NiTi alloy might reduce MS adhesion in vitro in the short term.
OBJECTIVE: To test the hypothesis that there are no differences in mutans streptococci (MS) adhesion between esthetic and metallic orthodontic arch wires based on their surface characteristics. MATERIALS AND METHODS: Surface roughness (Ra) and apparent surface free energy (SFE) were measured for six wires-four esthetic, one nickel-titanium (NiTi), and one stainless-steel (SS)-using profilometry and dynamic contact angle analysis, respectively. The amount of MS (Streptococcus mutans and Streptococcus sobrinus) adhering to the wires was quantified using the colony-counting method. The surfaces, coating layers, and MS adhesion were also observed by scanning electron microscopy. Statistical significance was set at P < .05. RESULTS: The Ra values of the esthetic wires were significantly different from one another depending on the coating method (P < .05). The NiTi wire showed the highest SFE, followed by the SS wire and then the four esthetic wires. The NiTi wires produced a significantly higher MS adhesion than did the SS wires (P < .05). The esthetic wires showed significantly lower MS adhesions than did the NiTi wire (P < .05). Pearson correlation analyses found moderate significant positive correlations between the SFE and the S mutans and S sobrinus adhesions (r = .636/.427, P < .001/P = .001, respectively). CONCLUSIONS: The hypothesis is rejected. This study indicates that some esthetic coatings on NiTi alloy might reduce MS adhesion in vitro in the short term.
Authors: C M Bollen; W Papaioanno; J Van Eldere; E Schepers; M Quirynen; D van Steenberghe Journal: Clin Oral Implants Res Date: 1996-09 Impact factor: 5.977
Authors: Ralf Buergers; Wulf Schneider-Brachert; Sebastian Hahnel; Martin Rosentritt; Gerhard Handel Journal: Dent Mater Date: 2008-09-02 Impact factor: 5.304
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