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""Sakellari D, Katsikari A, Slini T, Ioannidis I, Konstantinidis A, Arsenakis M. Prevalence and distribution of Aggregatibacter actinomycetemcomitans serotypes and the JP2 clone in a Greek population. J Clin Periodontol 2011; 38: 108�C114. doi: 10.1111/j.1600-051X.2010.01649.x Aim: To investigate the distribution of Aggregatibacter actinomycetemcomitans serotypes and the prevalence of the JP2 clone in subgingival samples of Greek subjects. Materials and Methods: Two hundred and twenty eight subjects participated in the present study. Each contributed with one pooled subgingival sample from the mesiobuccal surface of the four first molars. Samples http://www.selleckchem.com/products/GDC-0941.html were analysed using polymerase chain reaction for five serotypes of A. actinomycetemcomitans and the JP2 clone, using primers and conditions described previously. Subjects were stratified according to periodontal status (untreated periodontitis, non-periodontitis http://en.wikipedia.org/wiki/Diglyceride and periodontitis patients receiving supportive treatment). Comparisons between and within groups were performed by applying non-parametric tests (Kruskall�CWallis, Pearson ��2, z-test with Bonferroni's corrections and Kramer's V-test) at p=0.05 level. Results: A. actinomycetemcomitans was detected statistically more frequently in untreated patients (27.5%) compared with the other two groups (11.7% for non-periodontitis and 10% for periodontitis patients receiving supportive treatment). No statistical differences were observed concerning the distribution of serotypes among groups (z-test with Bonferroni's corrections p>0.05). Serotype c was more predominant within the periodontally diseased groups (Kramer's V-test p http://www.selleckchem.com/products/AZD0530.html ""Wennstr?m JL, Dahl��n G, Ramberg P. Subgingival debridement of periodontal pockets by air polishing in comparison to ultrasonic instrumentation during maintenance therapy. J Clin Peridontol 2011; 38: 820�C827. doi: 10.1111/j.1600-051X.2011.01751.x. Aim: The objective was to determine clinical and microbiological effects and perceived treatment discomfort of root debridement by subgingival air polishing compared with ultrasonic instrumentation during supportive periodontal therapy (SPT). Material and methods: The trial was conducted as a split-mouth designed study of 2-month duration including 20 recall patients previously treated for chronic periodontitis. Sites with probing pocket depth (PPD) of 5�C8?mm and bleeding on probing (BoP+) in two quadrants were randomly assigned to subgingival debridement by (i) glycine powder/air polishing applied with a specially designed nozzle or (ii) ultrasonic instrumentation. Clinical variables were recorded at baseline, 14 and 60 days post-treatment. Primary clinical efficacy variable was PPD reduction.