Longitudinal investigation of chronic periodontitis during maintenance therapy / 实用口腔医学杂志

ABSTRACT

Objectives:To investigate the characteristics of clinical changes during maintenance therapy of chronic periodontitis.Methods:22 patients with chronic periodontitis were enrolled in a 9-month maintenance care program after non-surgical periodontal therapy.Oral hygiene instructions together with supra-and sub-gingival scaling and root planing were carried out every 3 months.Clinical parameters including probing pocket depth(PPD),probing attachment level(PAL),and bleeding on probing(BOP) were recorded at baseline and each re-examination point.Results:The mean PPD decreased by 0.44 mm,PAL increased by 0.38 mm and BOP point number decreased by 18.94%.The recoveries were mainly observed during the first 3 months.Sites with ≥4 mm pocket at baseline exhibited a greater percentage of pocket deepening than those with initial shallow pocket.The incidence of the sites with PPD deeping of posterior teeth increased more than that of anterior teeth(P