Walsh Trevor F, Rawlinson Andrew, Wildgoose David, Marlow Ian, Haywood Julia, Ward Jennifer M
Department of Adult Dental Care, School of Clinical Dentistry, Claremont Crescent, Sheffield S10 2TA, UK.
J Dent. 2005 May;33(5):413-8. doi: 10.1016/j.jdent.2004.10.021. Epub 2004 Dec 20.
This study aimed to evaluate the stain removing/controlling properties of a whitening dentifrice and a stain controlling system, in a parallel group, multiple use study.
Subjects (63), were stratified according to baseline stain scores and randomly allocated to a group, A (standard dentifrice), B (whitening/stain removing dentifrice) or C (whitening/stain removing dentifrice, tooth polish, tooth polisher and whitening/stain removing mouthwash). At each attendance, extrinsic stain was scored blind by a trained and calibrated examiner using the Shaw and Murray Stain Index, under constant lighting conditions. In addition, whiteness was measured using a colorimeter.
The toothpaste regimens were well balanced at baseline (p=0.811). At 4 weeks, Regimens B and C had significantly less stain than A (p<0.05). Lower stain values were maintained/reduced for regimens B and C by week 6, with changes from baseline significantly greater than for Regimen A. When lightness was assessed by colorimeter, Regimen C was also found to be significantly whiter than Regimen A (p<0.05).
It was concluded that both whitening regimens had a significant effect on reducing tooth staining and improving whiteness over the 6 week time period.
在一项平行组、多次使用的研究中，本研究旨在评估一种美白牙膏和一种污渍控制系统的去污/控污性能。
根据基线污渍评分对63名受试者进行分层，并随机分配到A组（标准牙膏）、B组（美白/去污牙膏）或C组（美白/去污牙膏、牙齿抛光剂、牙齿抛光器和美白/去污漱口水）。每次就诊时，由一名经过培训和校准的检查人员在恒定光照条件下，使用肖和默里污渍指数对外部污渍进行盲法评分。此外，使用色度计测量白度。
牙膏方案在基线时平衡良好（p = 0.811）。在4周时，B组和C组的污渍明显少于A组（p < 0.05）。到第6周时，B组和C组的污渍值保持/降低，与基线的变化明显大于A组。当用色度计评估亮度时，还发现C组比A组明显更白（p < 0.05）。
得出的结论是，在6周的时间内，两种美白方案对减少牙齿染色和改善白度均有显著效果。
