title: Bone level around endodontically treated teeth in periodontitis patients.
abstract: OBJECTIVE
  This retrospective study compared the marginal bone level of teeth with root canal fillings with contra-lateral teeth without.
  
  
  METHODS
  Of 286 consecutive patients (> or =35 years), referred to practice for periodontology in the Netherlands, 67 full sets of radiographs contained > or =1 endodontically treated tooth and its contra-lateral tooth without root canal treatment. Bone level at the mesial and distal of these teeth was scored from the CEJ. In multi-rooted teeth, the presence of interradicular radiolucency was assessed. The presence of posts, and periapical radiolucencies was assessed. Analysis for differences between treated teeth and contra-laterals was controlled for tooth surface, presence of a post and tooth type.
  
  
  RESULTS
  The mean distance from the root filling to the apex was 2.6 mm. Periapical radiolucencies were found in 14%. The mean bone level was at 4.3 mm for endodontically treated teeth and at 3.7 mm for contra-laterals. Significantly more bone loss (0.6 mm) was found at the endodontically treated teeth. No difference was found between mesial and distal, teeth without and with posts and different tooth types. The presence of interradicular radiolucency was more frequent in endodontically treated teeth (OR 2.1, p(McNemar test)=0.039).
  
  
  CONCLUSIONS
  In periodontitis patients, teeth with endodontic treatment had more bone loss as compared with untreated contralaterals.
authors.affiliation: Department of Periodontology, ACTA, Amsterdam, The Netherlands. m.timmerman@acta.nl
authors.forename: M F
authors.initials: MF
authors.lastname: Timmerman
authors.forename: G A
authors.initials: GA
authors.lastname: Van der Weijden
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D000539:Alveolar Process / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010483:Periapical Diseases / Q000000981:diagnostic imaging; D010518:Periodontitis / Q000000981:diagnostic imaging*; D011176:Post and Core Technique; D011859:Radiography; D012189:Retrospective Studies; D012387:Root Canal Filling Materials / Q000737:chemistry; D012390:Root Canal Therapy; D019227:Tooth Apex / Q000000981:diagnostic imaging; D019237:Tooth Cervix / Q000000981:diagnostic imaging; D014092:Tooth Root / Q000000981:diagnostic imaging; D019553:Tooth, Nonvital / Q000000981:diagnostic imaging* / Q000628:therapy
chemical_list: D012387:Root Canal Filling Materials