Al-Omiri Mahmoud K, Abul Hassan Ra'ed S, AlZarea Bader K, Lynch Edward
Faculty of Dentistry, University of Jordan, Amman, Jordan; The City of London School of Dentistry, BPP University, UK.
Faculty of Allied Medical Sciences, The Royal University for Medical Sciences, Amman, Jordan.
J Dent. 2016 Mar;46:30-5. doi: 10.1016/j.jdent.2016.01.010. Epub 2016 Jan 27.
To evaluate the efficacy of tooth bleaching using ozone after hydrogen peroxide (H2O2) in comparison to the use of H2O2 alone.
70 extracted teeth were randomly distributed into two groups. Teeth surfaces in group 1 (n=35) were treated using 38% H2O2 and then were exposed to ozone for 60s and this ozonated peroxide mixture was left on the teeth for 20 min. Meanwhile, teeth in group 2 (n=35) were treated with H2O2 38% for 20 min. The L* a* b* and Vita Classic shade values of teeth were evaluated in both groups at base line, after application of H2O2 and ozone in group 1, and after application of H2O2 and then again after another application of ozone in group 2. The statistically significant changes were set at P ≤ 0.05.
Baseline L* a* b* and Vita shade values were comparable between groups (P>0.05). Teeth obtained lighter shades following bleaching with both H2O2 and ozone or with H2O2 alone (P ≤ 0.05). Further bleaching with ozone for teeth already bleached with H2O2 alone showed further improvement of the shades of teeth (P<0.001). Teeth treated with H2O2 and ozone had more shade improvements than those only treated with H2O2 (P<0.001). Also, L* values were increased while b* values were decreased (teeth obtained lighter shades) following bleaching in both groups (P ≤ 0.05). More changes were obtained when both ozone and H2O2 were used (P ≤ 0.05).
Bleaching with 38% H2O2 and ozone resulted in teeth with lighter shades than bleaching with 38% H2O2 alone.
比较过氧化氢（H₂O₂）之后使用臭氧进行牙齿漂白与单独使用H₂O₂的效果。
70颗拔除的牙齿随机分为两组。第1组（n = 35）的牙齿表面先用38%的H₂O₂处理，然后暴露于臭氧中60秒，将这种臭氧化的过氧化物混合物留在牙齿上20分钟。同时，第2组（n = 35）的牙齿用38%的H₂O₂处理20分钟。在基线时、第1组应用H₂O₂和臭氧后以及第2组应用H₂O₂后再应用一次臭氧后，评估两组牙齿的Lab*和Vita经典色值。统计学上的显著变化设定为P≤0.05。
两组之间的基线Lab和Vita色值具有可比性（P>0.05）。用H₂O₂和臭氧或仅用H₂O₂漂白后，牙齿的颜色变浅（P≤0.05）。对于已经仅用H₂O₂漂白的牙齿，再用臭氧进一步漂白显示牙齿颜色进一步改善（P<0.001）。用H₂O₂和臭氧处理的牙齿比仅用H₂O₂处理的牙齿颜色改善更多（P<0.001）。此外，两组漂白后L值增加而b*值降低（牙齿颜色变浅）（P≤0.05）。同时使用臭氧和H₂O₂时变化更大（P≤0.05）。
与单独使用38%的H₂O₂漂白相比，用38%的H₂O₂和臭氧漂白可使牙齿颜色更浅。
