2Yitzhak M, Sarnat H, Rakocz M, et al.The effect of toothbrush design on the ability of nurses to brush the teeth of institutionalized cerebral palsy patients. Spec Care Dentist, 2013, 33(1):20-27.
3Schwarz F, Aoki A, Becker J, et al.Laser application in non-surgical periodontal therapy: a systematic review. J Clin Periodontol. 2008, 35(Suppl 8):29-44.
4Duane B. Conservative periodontal surgery for treatment of intrabony defects is associated with improvements in clinical parameters[J].Ev-id Based Dent,2012,(04):115-116.
5Hayakawa H,Fujinami K,Ida A. Clinical outcome of surgical per-iodontal therapy:a short-term retrospective study[J].Bulletin of Tokyo Dental College,2012,(04):189-195.
6Yeh S,Andreana S. Crown lengthnig:basic principles,indications,techniques and clinical case[J].New York State Dental Journal,2004,(08):30-36.
