Tooth-related risk factors for periodontal disease in community-dwelling elderly people.
OBJECTIVE
While most previous epidemiological studies have focused on subject-level risk factors for periodontal destruction, tooth-related factors have not been fully explored. The purpose of this study was to evaluate both tooth-related and subject-related factors affecting periodontal disease progression using a two-level multilevel model.


METHODS
A longitudinal survey over a period of 10 years was carried out on 286 community-dwelling elderly subjects aged 70 years at baseline. Clinical attachment level (CAL) was measured at six sites per tooth on all teeth present and periodontal disease progression was defined as CAL> or =3 mm.


RESULTS
Periodontal disease progression was found in 79% of the subjects and most frequently in maxillary molars. Multilevel logistic regressions revealed that subjects wearing removable dentures were significantly at risk for periodontal disease progression. Abutment teeth for removable/fixed dentures were also significantly more likely to suffer periodontal breakdown. Furthermore, the following tooth-related variables were found to be possible risk factors for periodontal disease progression: maxillary and multirooted teeth.


CONCLUSIONS
Multirooted teeth and abutments for a fixed denture were possible risk factors for periodontal disease progression.
Hirotomi
Toshinobu
T
Department of Oral Health Science, Niigata University, Niigata City, Niigata, Japan. hirotomi@dent.niigata-u.ac.jp
Yoshihara
Akihiro
A
Ogawa
Hiroshi
H
Miyazaki
Hideo
H
D000368:Aged; D003442:Crowns / Q000706:statistics & numerical data; D000044:Dental Abutments / Q000706:statistics & numerical data; D003729:Dental Care / Q000706:statistics & numerical data; D003742:Dental Devices, Home Care / Q000706:statistics & numerical data; D003828:Denture, Overlay / Q000706:statistics & numerical data; D003830:Denture, Partial, Fixed / Q000706:statistics & numerical data; D003832:Denture, Partial, Removable / Q000706:statistics & numerical data; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008137:Longitudinal Studies; D008297:Male; D008437:Maxilla; D008963:Molar / Q000473:pathology; D017622:Periodontal Attachment Loss / Q000453:epidemiology; D010510:Periodontal Diseases / Q000453:epidemiology*; D010514:Periodontal Pocket / Q000453:epidemiology; D012111:Residence Characteristics; D012307:Risk Factors; D012907:Smoking / Q000453:epidemiology; D014070:Tooth / Q000473:pathology*; D016388:Tooth Loss / Q000453:epidemiology