1Boyd RL.Ei ghteen - month evaluation of effects of 0. 4%stannous fluoride gei on gingivitis in orthodontic patients[].American Journal of Orthodontics and Dentofacial Orthopedics.1994
2Preber H,Bergstrom J.The effect of non-surgical treatment on periodontal pokets in smokers and non-smokers[].Journal of Clinical Periodontology.1985
3Yeung S.Oral hygiene program for orthodontic patients[].American Journal of Orthodontics and Dentofacial Orthopedics.1989
