title: Patterns of bone loss around teeth restored with endodontic posts.
abstract: OBJECTIVE
  This retrospective study described the pattern of bone loss around teeth with endodontic posts in periodontitis patients, and compared it with contra-lateral teeth without posts.
  
  
  METHODS
  From full-mouth radiographic surveys of 146 periodontitis patients (> or =35 years), 194 roots with endodontic posts and contra-laterals without posts were selected. Upper molars, pre-molars with two posts and roots of lower molars with two posts were excluded. Technical parameters of the post space preparation, endodontic and restorative status were evaluated. The level of alveolar bone measured in millimetre from the cemento-enamel junction (CEJ)/restoration margin and the pattern of bone loss (angular/horizontal) were evaluated on both mesial and distal aspects of roots with posts and contra-laterals, but not on the furcal areas of lower molars.
  
  
  RESULTS
  The distance from the bone level to the CEJ/restoration margin was similar for teeth with posts and contra-laterals. However, teeth with posts had more angular defects mesially (18.8%versus 7.3%) as compared with their contra-laterals without posts. The defects around teeth with posts appeared to be typical in the sense that their apical level approximated the tip of the endodontic post.
  
  
  CONCLUSIONS
  In periodontitis patients, teeth restored by an endodontic post had angular bony defects on the mesial aspect more frequently in comparison with their contra-laterals.
authors.affiliation: Department of Periodontology, Academic Centre for Dentistry Amsterdam, Amsterdam 1066 EA , The Netherlands.
authors.forename: Sokratis
authors.initials: S
authors.lastname: Katsamakis
authors.forename: Mark
authors.initials: M
authors.lastname: Timmerman
authors.forename: Ubele
authors.initials: U
authors.lastname: Van der Velden
authors.forename: Michiel
authors.initials: M
authors.lastname: de Cleen
authors.forename: Fridus
authors.initials: F
authors.lastname: Van der Weijden
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging*; D000539:Alveolar Process / Q000000981:diagnostic imaging; D001641:Bicuspid / Q000000981:diagnostic imaging; D003442:Crowns; D000044:Dental Abutments; D018772:Dental Marginal Adaptation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000000981:diagnostic imaging; D009811:Odontometry; D010486:Periapical Tissue / Q000000981:diagnostic imaging; D010518:Periodontitis / Q000150:complications / Q000000981:diagnostic imaging; D011176:Post and Core Technique; D016300:Radiography, Bitewing; D012189:Retrospective Studies; D012390:Root Canal Therapy; D019237:Tooth Cervix / Q000000981:diagnostic imaging; D019231:Tooth Preparation, Prosthodontic; D014092:Tooth Root / Q000000981:diagnostic imaging; D019553:Tooth, Nonvital / Q000000981:diagnostic imaging