4Greenstein G.Periodontal response to mechanical non-surgical therapy:A review.J Periodontol,1992,63(2):118.
5Serino G,Rosling B,Ramberg P,et al.Initial outcome and long-term effect of surgical and non-surgical treatment of advanced periodontal disease.J Clin Periodontol,2001,28(10):910.
6Rosling B,Serino G,Hellstrm MK,et al.Longitudinal periodontal tissue alterations during supportive therapy.Findings from subjects with normal and high susceptibility to periodontal disease.J Clin Periodontol,2001,28(3):241.
7Harrel SK,Nunn ME.Longitudinal comparison of the periodontal status of patients with moderate to severe periodontal disease receiving no treatment,non-surgical treatment,and surgical treatment utilizing individual sites for analysis.J Periodontol,2001,72(11):1509.
