title: [Association of the progress of chronic periodontitis with interleukin-1B-511 genetic polymorphisms].
abstract: OBJECTIVE
  To study the natural progress of different degree chronic periodontitis and its association with IL-1B-511 genetic polymorphisms. METHODS; 100 subjects with chronic periodontitis were selected and examined at baselined and in the 6 month and in 1 year on attatchment loss at 6 sites of each tooth. DNA samples were obtained with buccal swabbing technique and were further analyzed for IL-1B-511 genotype polymorphisms using PCR-RFLP-based method in all subjects.
  
  
  RESULTS
  The mean AL increases were 1.43 mm within 1 year. Among 100 subjects, 16 patients with moderate progression (0 mm < AL increase/a year < or = 1.0 mm), 84 patients with rapid progression of periodontal disease (AL increase/ a year > 1.0 mm). There was no significant difference for the distribution and frequency of IL-1B-511 genotype and alleles between the AL increase/ a year > 1.0 mm group and AL increase/a year < or = 1.0 mm group. The progression of periodontal disease (AL increase/a year > 1.0 mm group) was significantly higher in the non-severe chronic periodontitis group than in the severe group (P < 0.05). The percentage of molar was higher as far as the rapid-progress sites (AL increase > 2.0 mm both in the 6th and the 12th months examination) were concerned than that of premolar and anterior (P < 0.05). The number of progressed sites in the severe group was higher than the non-severe chronic periodontitis group (P < 0.05).
  
  
  CONCLUSIONS
  The progress of chronic periodontits varies individually. No specific relationship was found between the progression of chronic periodontitis and IL-1 gene polymorphisms.
authors.affiliation: Key Laboratory of Oral Biomedical Engineering of Ministry of Education, Sichuan University, Chengdu 610041, China.
authors.forename: Xue-Li
authors.initials: XL
authors.lastname: Wu
authors.forename: Ping
authors.initials: P
authors.lastname: Huang
authors.forename: Xue-Dong
authors.initials: XD
authors.lastname: Zhou
mesh_terms: D000328:Adult; D000483:Alleles; D055113:Chronic Periodontitis; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007375:Interleukin-1; D008297:Male; D008875:Middle Aged; D010518:Periodontitis; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D007375:Interleukin-1