Noorollahian Saeed, Tabibi Atefeh
Department of Orthodontics, Dental Implants Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Orthodontics, Faculty of Dentistry, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran.
Dent Res J (Isfahan). 2022 Sep 26;19:74. eCollection 2022.
Patient cooperation is necessary for treatment success in removable orthodontics. Every factor has an adverse effect on appliances appearance can impede appliance wearing. This study investigated the effect of immersion in household cleaner and bleach liquids on fracture resistance of self-cure orthodontic acrylic resins.
This in vitro study two orthodontic acrylic resins (Megadental and Acropars) were used. Eighty identical acrylic samples (50 mm × 5 mm × 3 mm) from each acrylic resin were fabricated and divided into four groups (n = 20). For each type of acrylic resin; Group 1: 15 min immersion in household cleaner liquid (hydrochloric acid [HCl], 10%), 1 min rinsing with running water, 15 min immersion in household bleach liquid (sodium hypochlorite [NaOCl], 5.25%) and 1 min rinsing with running water were done. For Group 2, two times and for Group 3, three times immersion just like Group 1, were done. Group 4, as control, had no immersion. Fracture resistance of samples was measured with universal testing machine (Instron) in 3-point bending set-up. Data were analyzed with two-way repeated measurement ANOVA. Significance level was set at 0.05.
Fracture resistance of Acropars groups was greater than counterpart Megadental ones ( < 0.001). Immersion factor, alone ( = 0.375) and in combination with material ( = 0.603), did not make a significant difference among fracture resistance of each acrylic resin groups.
15 min immersion in household cleaner liquid (HCl acid) followed by 15 min immersion in household bleach liquid (NaOCl 5.25%) and even 3 times repetition of this process had not significant adverse effect on fracture resistance of acrylic resins.
在可摘矫治正畸治疗中，患者的配合对于治疗成功至关重要。任何影响矫治器外观的因素都可能妨碍矫治器的佩戴。本研究调查了浸泡在家用清洁剂和漂白剂液体中对自凝正畸丙烯酸树脂抗折性的影响。
本体外研究使用了两种正畸丙烯酸树脂（Megadental和Acropars）。从每种丙烯酸树脂制作了80个相同的丙烯酸样本（50毫米×5毫米×3毫米），并分为四组（每组n = 20）。对于每种类型的丙烯酸树脂，第1组：在家用清洁剂液体（盐酸[HCl]，10%）中浸泡15分钟，用流水冲洗1分钟，在家用漂白剂液体（次氯酸钠[NaOCl]，5.25%）中浸泡15分钟，并用流水冲洗1分钟。第2组进行上述浸泡两次，第3组进行三次，浸泡方式与第1组相同。第4组作为对照组，不进行浸泡。样本的抗折性在三点弯曲设置下用万能试验机（Instron）测量。数据用双向重复测量方差分析进行分析。显著性水平设定为0.05。
Acropars组的抗折性大于对应的Megadental组（P < 0.001）。单独的浸泡因素（P = 0.375）以及与材料的组合因素（P = 0.603），在每种丙烯酸树脂组的抗折性之间没有产生显著差异。
在家用清洁剂液体（盐酸）中浸泡15分钟，随后在家用漂白剂液体（5.25%次氯酸钠）中浸泡15分钟，甚至重复此过程3次，对丙烯酸树脂的抗折性没有显著的不利影响。
