Objectives: The aim of this in vitro study was to evaluate the effectiveness of a fluoridereleasing bonding agent in inhibiting enamel demineralization around orthodontic brackets after the exposure to a demineralizing solution. Materials and methods: Twenty-six extracted upper molars were bonded with two different composites: Transbond XT (TXT) and Transbond Plus (TPlus), fluoride-releasing (both 3 M Unitek, Monrovia, CA, USA). The samples were exposed to an acid lactic solution for three days and then subjected to Metallographic Optical Microscope (MOM) and Scanning Electron Microscope/Energy Dispersive X-Ray (SEM/EDX) analyses. Enamel surface was examined in different areas: un-treated, etched and primer-painted, un-treated area with no acid exposure, central area with bracket bonded. The maximum demineralization depths and the fluoride content at 100, 200 and 300 m depth were evaluated. Results: MOM analysis showed statistically significant (p < 0.001) differences in demineralization depth for TPlus group compared to TXT group with lower values for the first one. EDX analysis confirmed the presence of fluoride in TPlus group. Conclusions: The fluoride content of TPlus appeared able to weakly reduce the enamel demineralization.
In vitro evaluation of the effects of a fluoride-releasing composite on enamel demineralization around brackets / M. Zanarini; E. Pazzi; S. Bonetti; O. Ruggeri; G. Alessandri Bonetti; C. Prati. - In: PROGRESS IN ORTHODONTICS. - ISSN 1723-7785. - STAMPA. - 13:1(2012), pp. 10-16. [10.1016/j.pio.2011.04.004]
In vitro evaluation of the effects of a fluoride-releasing composite on enamel demineralization around brackets
RUGGERI, ODDONE;ALESSANDRI BONETTI, GIULIO;PRATI, CARLO
2012
Abstract
Objectives: The aim of this in vitro study was to evaluate the effectiveness of a fluoridereleasing bonding agent in inhibiting enamel demineralization around orthodontic brackets after the exposure to a demineralizing solution. Materials and methods: Twenty-six extracted upper molars were bonded with two different composites: Transbond XT (TXT) and Transbond Plus (TPlus), fluoride-releasing (both 3 M Unitek, Monrovia, CA, USA). The samples were exposed to an acid lactic solution for three days and then subjected to Metallographic Optical Microscope (MOM) and Scanning Electron Microscope/Energy Dispersive X-Ray (SEM/EDX) analyses. Enamel surface was examined in different areas: un-treated, etched and primer-painted, un-treated area with no acid exposure, central area with bracket bonded. The maximum demineralization depths and the fluoride content at 100, 200 and 300 m depth were evaluated. Results: MOM analysis showed statistically significant (p < 0.001) differences in demineralization depth for TPlus group compared to TXT group with lower values for the first one. EDX analysis confirmed the presence of fluoride in TPlus group. Conclusions: The fluoride content of TPlus appeared able to weakly reduce the enamel demineralization.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
