Hohlen Brian, Makowka Steven, Warunek Stephen, Al-Jewair Thikriat
Orthodontist, Private Practice, Sioux Falls, South Dakota, USA.
Research Specialist, Department of Restorative Dentistry, School of Dental Medicine, State University of New York at Buffalo, Buffalo, NY, USA.
J Clin Exp Dent. 2021 Jun 1;13(6):e601-e607. doi: 10.4317/jced.58099. eCollection 2021 Jun.
To investigate: 1) the effects of over-the-counter white strip enamel bleaching and 2-Step whitening toothpaste application on the shear bond strength of orthodontic brackets at 24-hours and 7-days post-bleaching latent period; and 2) the correlation between amount of bleaching and shear bond strength.
Sixty human premolar teeth were randomly assigned into two bleaching groups, white strip group treated with Crest® 3D WHITE™ LUXE Professional Effects Whitestrips (Proctor & Gamble, Greensboro, NC), and whitening toothpaste group, treated with Crest® 3D WHITE™ BRILLIANCE 2-Step Toothpaste (Proctor & Gamble, Greensboro, NC). The groups were further divided into 4 subgroups A, B, C, D (n=15 per group). Subgroups A and C were bonded 7 days after bleaching while subgoups B and D were bonded 24 hours after bleaching. Differences in shear bond strength between the subgroups and an unbleached control group (n=15) were compared using the Kruskal-Wallis test. Spectrophotometric color changes were recorded pre- and post-bleaching.
The mean shear bond strength for the white strip groups were 10.35±3.6 MPa and 11.69±4.33 MPa for the 7-day and 24-hour delayed bonding periods, respectively. Means for the whitening toothpaste groups were 11.01±4.31 MPa and 10.83±3.79 MPa for the 7-day and 24-hour delayed bonding periods. The mean for the control group was 9.59±3.32 MPa. There were no significant differences in shear bond strength between the groups at 7-days and 24-hour (=0.650). There was a significant difference between teeth bleached with white strips as compared to those bleached with toothpaste and controls. The correlations between color change and shear bond strength were not significant (=0.448).
There is a significant difference in the amount of whitening achieved by over-the-counter white strips compared to toothpaste; however, no significant effects on shear bond strength occurred after bleaching with white strips and toothpaste at 24-hours and 7-days. Bleaching, shear bond strength, orthodontics, over-the-counter.
旨在研究：1）非处方美白牙贴美白及使用两步式美白牙膏对正畸托槽在漂白后24小时和7天潜伏期时剪切粘结强度的影响；2）漂白量与剪切粘结强度之间的相关性。
60颗人类前磨牙随机分为两个漂白组，美白牙贴组使用佳洁士®3D炫白™专业美齿牙贴（宝洁公司，北卡罗来纳州格林斯伯勒）进行处理，美白牙膏组使用佳洁士®3D炫白™两步式牙膏（宝洁公司，北卡罗来纳州格林斯伯勒）进行处理。这些组进一步分为4个亚组A、B、C、D（每组n = 15）。亚组A和C在漂白7天后粘结，而亚组B和D在漂白24小时后粘结。使用Kruskal-Wallis检验比较亚组与未漂白对照组（n = 15）之间剪切粘结强度的差异。在漂白前后记录分光光度法颜色变化。
美白牙贴组在7天和24小时延迟粘结期的平均剪切粘结强度分别为10.35±3.6 MPa和11.69±4.33 MPa。美白牙膏组在7天和24小时延迟粘结期的平均值分别为11.01±4.3 MPa和10.83±3.79 MPa。对照组的平均值为9.59±3.32 MPa。在7天和24小时时，各组之间的剪切粘结强度无显著差异（P = 0.650）。与用牙膏漂白的牙齿和对照组相比，用美白牙贴漂白的牙齿存在显著差异。颜色变化与剪切粘结强度之间的相关性不显著（P = 0.448）。
与牙膏相比，非处方美白牙贴实现的美白量存在显著差异；然而，在24小时和7天时用美白牙贴和牙膏漂白后，对剪切粘结强度没有显著影响。漂白、剪切粘结强度、正畸学、非处方。
