Akila Srinivasan Raghavan1, Haritha Pottipalli Sathyanarayana1, Vignesh Kailasam2, Sridevi Padmanabhan1. 1. Department of Orthodontics, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, India. 2. Department of Orthodontics, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, India. Electronic address: vignesh.k@sriramachandra.edu.in.
Abstract
INTRODUCTION: The aims of the study were to evaluate and compare the bisphenol A (BPA) levels in saliva in patients using vacuum-formed retainers or Hawley retainers. METHODS:Forty-five patients who had completed their fixed orthodontic treatment and were entering the retention phase were randomly allocated into 1 of 3 groups: vacuum-formed retainer, Hawley retainer fabricated by heat cure, and Hawley retainer fabricated by chemical cure. Saliva samples were collected immediately before placement, within 1 hour after placement, 1 week and 1 month after placement. Statistical analyses were performed by using 2-way analysis of variance and post-hoc multiple-comparisons Tukey HSD tests. RESULTS: Statistically significant BPA levels in saliva were found for all groups (P ≤0.05). The highest levels were noted in the vacuum-formed retainer group, followed by Hawley retainers fabricated by chemical cure; the lowest levels were found with Hawley retainers fabricated by heat cure. CONCLUSIONS: With many options available for removable retainers, clinicians should consider the BPA release from these retainers; a Hawley retainer fabricated by heat cure is a favorable choice.
RCT Entities:
INTRODUCTION: The aims of the study were to evaluate and compare the bisphenol A (BPA) levels in saliva in patients using vacuum-formed retainers or Hawley retainers. METHODS: Forty-five patients who had completed their fixed orthodontic treatment and were entering the retention phase were randomly allocated into 1 of 3 groups: vacuum-formed retainer, Hawley retainer fabricated by heat cure, and Hawley retainer fabricated by chemical cure. Saliva samples were collected immediately before placement, within 1 hour after placement, 1 week and 1 month after placement. Statistical analyses were performed by using 2-way analysis of variance and post-hoc multiple-comparisons Tukey HSD tests. RESULTS: Statistically significant BPA levels in saliva were found for all groups (P ≤0.05). The highest levels were noted in the vacuum-formed retainer group, followed by Hawley retainers fabricated by chemical cure; the lowest levels were found with Hawley retainers fabricated by heat cure. CONCLUSIONS: With many options available for removable retainers, clinicians should consider the BPA release from these retainers; a Hawley retainer fabricated by heat cure is a favorable choice.
Authors: Anabela Baptista Paula; Debbie Toste; Alfredo Marinho; Inês Amaro; Carlos-Miguel Marto; Ana Coelho; Manuel Marques-Ferreira; Eunice Carrilho Journal: Int J Environ Res Public Health Date: 2019-05-09 Impact factor: 3.390
Authors: Siemon De Nys; Eveline Putzeys; Philippe Vervliet; Adrian Covaci; Imke Boonen; Marc Elskens; Jeroen Vanoirbeek; Lode Godderis; Bart Van Meerbeek; Kirsten L Van Landuyt; Radu Corneliu Duca Journal: Sci Rep Date: 2018-05-03 Impact factor: 4.379