[The relationship between the calcaneus density and the degree of inflammation in patients with generalized aggressive periodontitis].

Purpose: To evaluate the relationship between the calcaneus density and the degree of inflammation in patients with generalized aggressive periodontitis.

Methods: Thirty one volunteers with healthy periodontium (as control group) and 38 patients with generalized aggressive periodontitis (as experimental group) were involved in this study. The average ages of the two groups were 27 and 23 years respectively.

[Juvenile periodontitis survey in 9548 middle school students at Huangpu District in Shanghai].

Objective: 9548 middle school students from 11-19 age at Huangpu District in Shanghai were investigated to study the prevalence of juvenile periodontitis(JP). The purpose of the present study was to discover JP at early stage and make correct diagnosis, so the patients can be treated on time.

Methods: From January 2001 to April 2001, debris index(DI), calculus index(CI), sulcus bleeding index(SBI) and community periodontal index for treatment needs (CPITN) were examined in each student.

[Analysis for clinical effect of a rinse containing cetylpyridinium chloride in treatment of gingivitis and periodontitis].

Objective: To investigate the clinical effect of a 0.1% cetylpyridinium chloride(CPC) rinse on the treatment of gingivitis and periodontitis.

Methods: A multicenter, randomized, parallel group trial was conducted.