Effect of Cleanser Solutions on the Retention Force of O’ring Attachment: An in Vitro Study

Abstract

The aim of this study was to evaluate the effect of cleaning solutions on the retention force of o-ring-type overdenture attachments. The effect of four solutions on nitrile rings were evaluated: Cepacol (C), Cepacol with fluoride (CF), Listerine (L) and 0.05% sodium hypochlorite (SH); deionized water (DW) was used as a control. Matrices containing two implants and abutments and acrylic specimens with the metal capsules were obtained and divided into the groups. A simulation of 90 overnight immersions (8 h) was performed, and the tensile strength value was obtained at the beginning (T0) and in every 30 days (T1, T2 and T3) (n=6). In order to analyze o-ring surface damage after the immersions, a scanning electron microscopy (SEM) was used (n=1). For statistical analysis of the results, analysis of variance (ANOVA) and multiple comparisons with Bonferroni adjustment (test power=1.000; a=0.05) were used. There was a significant difference for the factors time (p<0.001), solution (p<0.001) and for the interaction time × solution (p<0.001). Considering the times of each solution, only for DW there was no significant loss of retention over time. Comparing the solutions in each moment, there was no difference among the solutions in T0. From T1, CF and SH provided less retention than DW (p<0.005). Through SEM it was possible to observe changes in the surface of the CF and SH nitrile o-rings. CF and SH should be avoided due to deleterious action in o-rings.

Influence of Mouthwash Rinsing on the Mechanical Properties of Polymeric Ligature Ties Used for Dental Applications

“…Despite that, this effect was not significant when observed at acidic and neutral pH [ 40 ]. Furthermore, a recent study has demonstrated that the exposure to commercial mouthwash reduced the tensile strength of nitrile O-rings used for overdenture attachment [ 20 ]. Changes in surface morphology following the exposure to a certain type of cleaning solution were also reported [ 20 ].…”

“…Furthermore, a recent study has demonstrated that the exposure to commercial mouthwash reduced the tensile strength of nitrile O-rings used for overdenture attachment [ 20 ]. Changes in surface morphology following the exposure to a certain type of cleaning solution were also reported [ 20 ]. However, the influence of bleaching agents at the concentration used in commercial mouthwashes appeared to be not as significant, based on the findings from another study [ 41 ].…”

“…On the contrary, this was not the case for tensile strength of stainless steel arch wires, as no significant change was found after being exposed to mouthwash [ 19 ]. Furthermore, the delivery force of orthodontic elastomeric chains and tensile strength of O-rings used for overdenture attachment were also negatively affected by mouthwashes [ 6 , 20 ].…”

Efeitos dos métodos de higienização mecânicos e químicos na cápsula de o\'ring de overdenture

“…A hipótese nula testada foi que os métodos de higienização avaliados não alterariam os diâmetros interno e externo dos o'rings e não provocariam diferença na força de retenção durante os diferentes tempos de análise. Cada grupo, referente a cada método de higiene foi composto por 6 corpos de prova (FELIPUCCI et al, 2020) e em cada corpo de prova foram colocados 2 o'rings (simulando o que ocorre na maioria dos casos de overdentures).…”

“…Em casos de overdentures, não há ainda um protocolo de higienização estabelecido. Há relatos que a alteração da retenção das cápsulas pode ocorrer não somente devido ao uso prolongado do conjunto macho e fêmea (KARABUDA; YALTRK; BAYRAKTAR, 2008;LERTSURIYAKARN;PALANUWECH, 2020), ciclos de inserção e remoção da prótese (BONACHELA et al, 2003;YOU et al, 2011;KÜRKCÜOǦLU et al, 2016;CHIU et al, 2017;KANG et al, 2019;FELIPUCCI et al, 2020), temperatura da água (CHIU et al, 2017) mas também devido ao emprego de soluções higienizadoras (VARGHESE et al, 2007;NGUYEN et al, 2010;YOU et al, 2011;WATCHARAPICHAT et al, 2014;DERAFSHI et al, 2015;KÜRKCÜOǦLU et al, 2016;KHODADADKASHI et al, 2019;AYYILDIZ et al, 2020;FELIPUCCI et al, 2020;KÜÇÜKEKENCI;DEDE;ÇELIK, 2021). Existe uma grande dificuldade em avaliar as características físicas e mecânicas das cápsulas, visto que, são estruturas pequenas e que sua composição é diferente de acordo com a marca comercial utilizada (FELIPUCCI et al, 2020;KÜÇÜKEKENCI;DEDE;ÇELIK, 2021).…”