Efficacy of three hygienic protocols in reducing biofilm adherence to removable thermoplastic appliance

Abstract

Objectives: To examine the ability of a removable thermoplastic appliance (RTA) to adsorb hygienic solutions and inhibit bacterial growth and to examine the efficacy of three hygiene protocols in reducing bacterial biofilm adherence to RTA. Materials and Methods: Solution adsorption and bacterial growth inhibition were examined in vitro using paper vs RTA discs. Subsequently, 11 patients treated with RTA (mean age, 29.1 6 4.7 years) were assigned into a sequence of three hygiene protocols: regular RTA brushing (baseline), immersion RTAs in chlorhexidine mouthwash (CHX), and using a vibrating bath with cleaning solution (VBC). For each patient, 12 upper RTAs were examined (2 baseline RTAs, 5 CHX RTAs, and 5 VBC RTAs), for a total of 132 RTAs. All RTAs were stained with gentian violet, and biofilm presence was measured using a photodensitometer. Results: The RTA discs did not adsorb CHX or cleaning solution. The later agent did not show antibacterial features. Baseline RTAs showed significant biofilm adherence (P , .001) on the posterior palatal side of the aligner and on the anterior incisal edge. CHX and VBC hygienic protocols significantly (P , .001) reduced baseline biofilm adherence by 16% and 50%, respectively. Hygienic improvement was maintained over 140 days when CHX and VBC were used. However, VBC was three times more efficient than CHX. Conclusions: This study highly recommends the use of a VBC protocol. Biofilm deposits on the RTA, especially on incisal edges and attachment dimples, could lead to inadequate tooth/RTA and attachment/RTA overlap and consequently impair tooth alignment. (Angle Orthod. 2014;84:161-170.)

Effects of aging procedures on the molecular, biochemical, morphological, and mechanical properties of vacuum-formed retainers

“…Since the forming procedure always includes a heating cycle of either vacuum forming or pressure forming, it might cause distinct changes in their morphologic and mechanical properties. Furthermore, thermoplastic materials under intraoral use eventually undergo thermal, mechanical, and chemical degradation, and these changes can be observed through molecular structure and orientation (Schuster et al, 2004;Shpack et al, 2014).…”

Scanning electron microscopy analysis of the growth of dental plaque on the surfaces of removable orthodontic aligners after the use of different cleaning methods

“…The results showed that the CHX and vibrating bath with cleaning solution hygiene protocols significantly ( P <0.001) reduced baseline biofilm adherence, by 16% and 50% respectively, with the vibrating bath with cleaning solution treatment found to be three times more efficient than CHX. 14 …”

Tratamiento Ortodóntico Invisible Mediante Invisalign: Revisión De Literatura Basada en Evidencia

“…Los pacientes deben recibir un protocolo de higiene regular no solo de sus piezas dentales, sino también del dispositivo alineador, en el cepillado se debe utilizar cualquier pasta dental que contenga fluoruro alrededor a los 1400 ppm (19).…”

“…El paciente debe cepillar el alineador con un cepillo de dientes cada noche, y luego sumergirlo en un enjuague bucal de clorhexidina durante 15 minutos, para posteriormente lavarlo con agua y volver a colocarlo en la boca (19). EFECTIVIDAD La efectividad de los alineadores Invisalign es discutible, para algunos esta se da simplemente si se lleva a cabo la reducción interproximal según lo prescrito, pero no se hacen otras modificaciones para aumentar el movimiento del diente; esta percepción limitada de efectividad no es aceptada por todos, y a decir verdad podría no ser considerada como un buen indicador.…”