OBJECTIVETo study the severity of periodontitis and risk factors in Chengdu.

METHODS202 periodontitis patients (65 male, 137 female), aged from 25 to 60, were requested to fill a questionnaire. Probing depth (PD), clinical attachment level (CAL), gingival recession and bleeding on probing (BOP) on 6 sites of each tooth were measured and recorded.

RESULTSThe mean PD, AL, gingival recession and BOP% of 202 subjects was (3.2 +/- 0.31) mm, (3.5 +/- 0.37) mm, (0.3 +/- 0.02) mm and 21.16%. 59% of subjects missed at least one tooth. 129 subjects suffered with initial to moderate periodontitis. 73 subject suffered with advanced periodontitis. 40, 86, 55 and 21 subjects had received college education, high school education, middle school education and primary school education. 18% of subjects had smoking history, 67% subjects had tea/coffee history, 66% of subjects had psychosocial problem, and only 8% of subjects had received regular periodontal treatment. There is no relationship between the severity of periodontitis and education.

CONCLUSIONIt is very important to develop an education program on oral healthy for people in Chengdu.

Adult ; Female ; Gingival Recession ; Humans ; Male ; Middle Aged ; Periodontal Attachment Loss ; Periodontal Index ; Periodontitis ; Risk Factors

OBJECTIVETo investigate the association between Fc gamma receptor IIA gene polymorphism and susceptibility to chronic periodontitis in Chinese Han nationality.

METHODSDNA samples were collected with buccal swabs from 63 patients with severe chronic periodontitis(CP), 103 patients with mild to moderate CP and 80 healthy individuals as control. Polymorphism in Fc gamma receptor IIA gene cluster was analyzed with PCR-SSP. The genotype distribution and allele frequency among different groups were compared.

RESULTSIt was found that the frequency of Fc gamma RIIA-R/R131 genotype was significantly higher in patients with severe CP (19.05%) compared to that of the healthy controls (P < 0.0125).

CONCLUSIONThe Fc gamma RIIA-R/R131 genotype may be one of the contributors for the increased susceptibility to severe CP in Chinese Han nationality.

Adult ; Antigens, CD ; genetics ; China ; ethnology ; Chronic Disease ; Female ; Gene Frequency ; Genetic Predisposition to Disease ; genetics ; Genotype ; Humans ; Male ; Middle Aged ; Periodontitis ; genetics ; Polymerase Chain Reaction ; methods ; Polymorphism, Genetic ; Receptors, IgG ; genetics