[Evaluation of the in vitro quantitative measurement of II degree furcation involvements in mandibular molars by cone-beam computed tomography].

Objective: To evaluate the accuracy of measurement of II degree furcation involvements in molars of dry mandibles by cone-beam computed tomography (CBCT).

Methods: Twenty molars with II degree furcation involvements in dry mandibles were examined directly and measured by CBCT. Eight parameters were selected to describe the exact appearance of each II degree furcation involvements, including vertical defect dimensions, horizontal defect dimensions and furcation entrance dimensions.

[Detection of periodental pathogens in atherosclerotic lesions in patients].

Objective: To detect periodontopathic bacterial DNA in atherosclerotic vascular lesions in a group of Chinese patients by using polymerase chain reaction (PCR) techniques.

Methods: Ten human specimens of atherosclerotic plaque were obtained sterilely. The sclerotic lesions were blade into fine pieces and DNA was isolated from the samples.

[Combination therapy of periodontal intrabony defects with demineralized freeze-dried bone powder and platelet-rich plasma].

Objective: To evaluate the effect of decalcified freeze-dried bone allograft (DFDBA) and DFDBA with platelet-rich plasma (PRP) in the treatment of periodontal infrabony defects.

Methods: Fifteen periodontal infrabony defects (30 sites) in 12 patients with periodontitis (9 patients with chronic periodontitis and 3 patients with aggressive periodontitis) were selected. Three months after initial therapy, they were assigned to either the DFDBA group (10 defects with 20 sites) or the DFDBA with PRP group (5 defects with 10 sites).

[Association of Fc gamma receptors IIIA gene polymorphisms with the susceptibility to periodontitis in Chinese patients].

Objective: Fc gamma receptors IIIA (Fc gamma RIIIA) mediates phagocytosis by macrophages, and cytokine production by NK cells and lymphocytes. The Fc gamma R IIIA-158V/F polymorphism may play a role in the pathogenesis of periodontitis. This study was to detect Fc gamma R IIIA-158V/F genotypes in Chinese patients with different forms of periodontitis.

[Effect of periodontal initial therapy on the serum level of lipid in the patients with both periodontitis and hyperlipidemia].

Objective: To observe the effect of periodontal initial therapy on the serum level of lipid in the patients with both periodontitis and hyperlipidemia.

Methods: Twenty patients with both hyperlipidemia and moderate to severe chronic periodontitis were enrolled in this study. Periodontal parameters [plaque index (PLI), bleeding on probing (BOP), bleeding index (BI), probing depth (PD) and attachment level (AL)] were evaluated prior to and 3 months after periodontal initial therapy.