title: Relationship between periodontal condition and plasma reactive oxygen metabolites in patients in the maintenance phase of periodontal treatment.
abstract: BACKGROUND
  The relationship between systemic antioxidative status and periodontal condition has been investigated in epidemiologic studies. However, little literature is available with regard to the correlation between systemic reactive oxygen species and periodontal condition. The purpose of this cross-sectional study was to investigate the relationship between plasma reactive oxygen metabolites (ROM) and periodontal condition in patients in the maintenance phase of periodontal treatment.
  
  
  METHODS
  Eighty-one subjects (mean age: 57.4 years) who had entered a periodontal maintenance program were examined for probing depth (PD) and clinical attachment level (CAL). Plasma levels of ROM and biologic antioxidant potential (BAP) were determined with a free radical electric evaluator.
  
  
  RESULTS
  The plasma level of ROM was positively correlated to mean CAL (r = 0.281; P = 0.011) and percentage of teeth with CAL > or =4 mm (r = 0.236; P = 0.034), but not mean PD (r = 0.196; P = 0.080). Logistic regression analysis showed that subjects with ROM levels >400 Carratelli units (CARR U) had significantly higher mean CAL compared to subjects with ROM < or =400 CARR U after adjusting for age, gender, and the number of teeth present (P = 0.011). However, the plasma level of BAP was not significantly correlated with the periodontal parameters.
  
  
  CONCLUSIONS
  A positive association was found between plasma oxidative status and CAL in patients in the maintenance phase of periodontal therapy. A systemic increase in oxidative stress may influence the rate of progression of periodontal disease.
authors.affiliation: Department of Oral Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Naofumi
authors.initials: N
authors.lastname: Tamaki
authors.forename: Takaaki
authors.initials: T
authors.lastname: Tomofuji
authors.forename: Takayuki
authors.initials: T
authors.lastname: Maruyama
authors.forename: Daisuke
authors.initials: D
authors.lastname: Ekuni
authors.forename: Reiko
authors.initials: R
authors.lastname: Yamanaka
authors.forename: Noriko
authors.initials: N
authors.lastname: Takeuchi
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Yamamoto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000975:Antioxidants / Q000378:metabolism*; D003430:Cross-Sectional Studies; D003729:Dental Care; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009910:Oral Hygiene; D018384:Oxidative Stress / Q000502:physiology*; D017622:Periodontal Attachment Loss / Q000097:blood* / Q000628:therapy; D010510:Periodontal Diseases / Q000097:blood / Q000628:therapy; D010512:Periodontal Index; D010519:Periodontium / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000097:blood*; D055815:Young Adult
chemical_list: D000975:Antioxidants; D017382:Reactive Oxygen Species