Hasanzadeh Azhiri Aidin, Tashakor Ali, Mirmohammadi Kamal, Rasooli Reza
Department of Orthodontics, Faculty of Dentistry, Tehran Azad University of Medical Sciences, Tehran, Iran.
Dent Res J (Isfahan). 2024 Nov 21;21:61. doi: 10.4103/drj.drj_84_24. eCollection 2024.
With recent increases in demand for the esthetic aspects of orthodontic treatments, the use of ceramic brackets has gained more popularity. Dental demineralization is a frequent, undesired effect of microbial biofilm adhesion to orthodontic appliances. The crystalline structure of ceramics results in different material properties, and its possible effect on microbial adhesion was investigated in this study.
This research was conducted experimentally and . Samples consisted of 40 monocrystalline and 40 polycrystalline brackets, further divided into two groups incubated with either alone or with . The culture medium was Tryptic Soy Broth with 20% sucrose. All samples were incubated at 37°C for 48 h. Macroscopic detachment of the formed biofilm would be the basis for adhesion scoring. The Mann-Whitney test was used to analyze the adhesion scores. In this study, a significance level of < 0.05 was considered.
The mean for adhesion score in group was 1.85 ± 0.67 for the monocrystalline group and 2.35 ± 0.59 for the polycrystalline group (27% difference, = 0.035). The adhesion score in and group was lower in the monocrystalline group (1.6 vs. 2.0) but was not statistically significant ( = 0.108).
This study showed that monocrystalline ceramic brackets had less overall microbial biofilm adhesion compared to polycrystalline ceramic brackets, especially when incubated with alone. This observation might be explained primarily by lower surface roughness in monocrystalline ceramics.
随着近期对正畸治疗美学方面需求的增加，陶瓷托槽的使用越来越普遍。牙齿脱矿是微生物生物膜附着于正畸矫治器常见的不良后果。陶瓷的晶体结构导致其具有不同的材料特性，本研究对其对微生物附着的可能影响进行了调查。
本研究采用实验方法进行。样本包括40个单晶托槽和40个多晶托槽，进一步分为两组，分别单独与 或 一起培养。培养基为含20%蔗糖的胰蛋白胨大豆肉汤。所有样本在37°C下培养48小时。形成的生物膜的宏观脱落将作为附着评分的依据。采用曼-惠特尼检验分析附着评分。在本研究中，显著性水平设定为 < 0.05。
组中，单晶组的附着评分均值为1.85±0.67，多晶组为2.35±0.59（差异27%， = 0.035）。单晶组在 和 组中的附着评分较低（1.6对2.0），但无统计学意义（ = 0.108）。
本研究表明，与多晶陶瓷托槽相比，单晶陶瓷托槽的整体微生物生物膜附着较少，尤其是在单独与 培养时。这一观察结果可能主要归因于单晶陶瓷较低的表面粗糙度。
