[Effects of non-surgical periodontal therapy on serum inflammatory markers and metabolic level in obese rats].

Objective: To investigate the effects of non-surgical periodontal therapy on serum inflammatory factors and metabolism levels in obese rats with experimental periodontitis.

Methods: Sixteen obese rats with experimental periodontitis were randomly divided into treatment group and control group with non-surgical periodontal therapy and no treatment, respectively. Oral glucose tolerance test was performed before treatment and 2 weeks after the treatment.

[Beneficial effect of periodontal therapy on insulin resistance and lipid metabolism in obese rats with periodontitis].

Objective: To investigate the effect of periodontal therapy in controlling periodontitis and on insulin resistance and lipid metabolism in obese rats with periodontitis.

Methods: Sprague-Dawley rats were randomized into normal group (group C), obese group (group O), periodontitis combined with obesity group (group P) and periodontal treatment group (group T). The obese rats in groups P and T were subjected to ligation of the maxillary second molar with silk thread to induce experimental periodontitis, and the rats in group T received periodontal therapy after the ligation.

[Cytotoxicity evaluation of three kinds of perforation repair materials on human periodontal ligament fibroblasts in vitro].

Objective: To select three kinds of perforation repair materials, mineral trioxide aggregate (MTA), Z350, amalgam. And to evaluate the cytotoxicity of three kinds of perforation repair materials on human periodontal ligament fibroblasts (HPDLF) in vitro.

Methods: The proliferation of HPDLF to three perforation repair materials were examined by methyl thiazolyl tetrazolium (MTT) assay at 1, 3 and 5 days.

[Morphology and microleakage study of repairing subpulpal wall perforation with resinous inlay].

Objective: The purpose of this study is to study the sealing ability and the furcal appearance of repairing subpulpal wall perforation with resinous inlay.

Methods: Fifty newly extracted human molars were randomly divided into three experiment groups (group A, group B, group C, 15 teeth each) and one control group (5 teeth). In experiment groups, perforations were made perpendicularly to the center of the pulp chamber floor.

[Study of apical diffusion of three different kinds of calcium hydroxide preparations in vitro].

Purpose: To investigate the diffusion effect of calcium hydroxide in periapical simulation of the diffusion model.

Methods: Pipetman pipette tips, plastic syringes and BHI agar were prepared to be periapical simulation of the diffusion model. 120 simulation models were divided into three groups.