Yaseen Saba N, Taqa Amer A, Al-Khatib Ali R
Department of Pedodontics Orthodontics and Preventive Dentistry, College of Dentistry, University of Mosul, Mosul, Iraq.
Department of Dental Basic Science, College of Dentistry, University of Mosul, Mosul, Iraq.
J Oral Biol Craniofac Res. 2020 Apr-Jun;10(2):128-134. doi: 10.1016/j.jobcr.2020.03.008. Epub 2020 Apr 5.
One of the causes of dental caries that occurs due to orthodontic treatment is the lack of antibacterial properties in orthodontic adhesive. This study was designated to investigate the effect of orthodontic resin modified by incorporating Nano Cinnamon powder on the shear bond strength of orthodontic brackets.
Heliosit Orthodontic Resin, a photo-activated light cure resin was modified by the addition of Cinnamon in the form of Nano particle powder. Twenty uniform disks were made, 5 as a control and 5 for each concentration of the 1%, 3% and 5% wt/wt Cinnamon modified resin. Their antimicrobial activity against was tested using the disk diffusion method. Then, the most effective concentration of the modified resin was used to bond metal orthodontic brackets to human extracted premolars. The universal testing machine was used to record the shear bond strength of the control and the modified resin. Also, the adhesive remnant index was measured.
Disc diffusion method showed that the 3% wt/wt Cinnamon powder modified resin was more effective than 1% with a larger bacterial inhibition zone. Shear bond strengths of the control were 8.50 MPa and 7.20 MPa for the 3% Cinnamon modified resin with no significant difference between them. Also, no significant difference was recorded in the adhesive remnant index scores between the control and the modified resin groups.
Findings of this study revealed that the incorporation of 3% Cinnamon Nano particles in orthodontic resin produced an antibacterial effect against without compromising the shear bond strength.
Incorporation of Cinnamon Nano particles in orthodontic resin may reduce caries formation around brackets during treatment course.
正畸治疗导致龋齿的原因之一是正畸黏合剂缺乏抗菌性能。本研究旨在调查掺入纳米肉桂粉改性的正畸树脂对正畸托槽剪切粘结强度的影响。
将光固化正畸树脂Heliosit通过添加纳米颗粒粉末形式的肉桂进行改性。制作20个均匀的圆盘，5个作为对照，1%、3%和5%重量/重量浓度的肉桂改性树脂各5个。采用纸片扩散法测试其对[具体细菌名称未给出]的抗菌活性。然后，使用改性树脂的最有效浓度将金属正畸托槽粘结到拔除的人类前磨牙上。使用万能试验机记录对照树脂和改性树脂的剪切粘结强度。同时，测量粘结残留指数。
纸片扩散法显示，3%重量/重量浓度的肉桂粉改性树脂比1%的更有效，抑菌圈更大。对照组的剪切粘结强度为8.50MPa，3%肉桂改性树脂的为7.20MPa，两者之间无显著差异。对照树脂组和改性树脂组之间的粘结残留指数评分也无显著差异。
本研究结果表明，在正畸树脂中掺入3%的肉桂纳米颗粒可产生对[具体细菌名称未给出]的抗菌作用，且不影响剪切粘结强度。
在正畸树脂中掺入肉桂纳米颗粒可能会在治疗过程中减少托槽周围龋齿的形成。
