title: Radiographic alveolar bone loss in untreated Taiwan Chinese subjects with adult periodontitis measured by the digital scanning radiographic image analysis method.
abstract: OBJECTIVE
  To determine differences in radiographic alveolar bone loss (RABL) by age group, gender and tooth type in subjects with adult periodontitis using the digital scanning radiographic image analysis (DSRIA) method.
  
  
  METHODS
  A total of 4262 teeth were examined for RABL in 178 individuals (96 males and 82 females). Mesial and distal sites were determined by the DSRIA method following scanning of periapical radiographs and using the Microstation 95 image software.
  
  
  RESULTS
  Linear assessment of RABL using DSRIA revealed the following results. Mean bone loss of maxillary and mandibular anterior teeth was significantly higher (P<0.001 and P<0.01, respectively) in males compared with females using a two-sample t-test. The highest values of mean RABL occurred most commonly in the maxillary first molars (53.8% and 51.4% for females and males, respectively) and the mandibular central incisors (50.4% and 41.5% for males and females, respectively). Mean RABL was greater in males than in females for both the mandibular and maxillary arches, with the exception of molar sites.
  
  
  CONCLUSIONS
  Maxillary first molars and mandibular incisors are the highest risk sites. Moreover, greater loss occurs at the molar site in females compared with males for untreated periodontitis in Taiwan Chinese people.
authors.affiliation: Graduate Institute of Dental Sciences, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan. houkl@kmu.edu.tw
authors.forename: G-L
authors.initials: GL
authors.lastname: Hou
authors.forename: C-C
authors.initials: CC
authors.lastname: Hung
authors.forename: Y-S
authors.initials: YS
authors.lastname: Yang
authors.forename: T-Y
authors.initials: TY
authors.lastname: Shieh
authors.forename: C-C
authors.initials: CC
authors.lastname: Tsai
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007180:Incisor / Q000000981:diagnostic imaging; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging; D008437:Maxilla / Q000000981:diagnostic imaging; D008875:Middle Aged; D008963:Molar / Q000000981:diagnostic imaging; D010518:Periodontitis / Q000000981:diagnostic imaging*; D016300:Radiography, Bitewing; D019252:Radiography, Dental, Digital; D015203:Reproducibility of Results; D012737:Sex Factors; D013624:Taiwan