title: Radiographic evaluation of the classification of the extent of tooth resorption in dogs.
abstract: OBJECTIVE
  To determine applicability of the 2007 American Veterinary Dental College (AVDC) classification method for determining extent of tooth resorption in dogs.
  
  
  METHODS
  224 dogs > 1 year old admitted for periodontal treatment or other dental procedures in 2007.
  
  
  METHODS
  Full-mouth radiographs of all dogs were reviewed for evidence of tooth resorption. Tooth resorption in dogs was classified in accordance with the radiographic criteria described for use in human teeth and, when applicable, the guidelines described in the 2007 AVDC classification method.
  
  
  RESULTS
  851 of 943 (90.2%) affected teeth met the radiographic characteristics of 1 of the 5 stages of tooth resorption described by the AVDC classification method. Among tooth resorption types described for human teeth, the AVDC classification method was totally applicable (100%) in 17 teeth with external surface resorption, 21 teeth with external replacement resorption, and 736 teeth with external cervical root surface resorption, but it was applicable in only 56 of 121 (46.3%) teeth with external inflammatory resorption and none of the teeth with internal resorption.
  
  
  CONCLUSIONS
  The AVDC classification method was useful to describe the extent of tooth resorption in dogs, but it did not reflect the radiographic patterns and location of lesions. The AVDC classification method was applicable in some, but not all, of the teeth with various resorption types in dogs. The AVDC classification method could be adapted best to lesions that have radiographic patterns of external replacement resorption and external cervical root surface resorption.
authors.affiliation: Dentistry and Oral Surgery Service, William B. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616, USA.
authors.forename: Santiago
authors.initials: S
authors.lastname: Peralta
authors.forename: Frank J M
authors.initials: FJ
authors.lastname: Verstraete
authors.forename: Philip H
authors.initials: PH
authors.lastname: Kass
mesh_terms: D000818:Animals; D003815:Dentists; D004283:Dog Diseases / Q000145:classification / Q000000981:diagnostic imaging* / Q000473:pathology; D004285:Dogs; D006801:Humans; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology; D009055:Mouth / Q000000981:diagnostic imaging; D010510:Periodontal Diseases / Q000145:classification / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary; D011859:Radiography; D015203:Reproducibility of Results; D013499:Surface Properties; D014091:Tooth Resorption / Q000145:classification / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D014092:Tooth Root / Q000000981:diagnostic imaging