title: [Measurement of  the volume absorption of alveolar bone grafting].
abstract: OBJECTIVE
  To determine the bone absorption at different time after alveolar autogenous bone grafting using spiral CT three-dimensional reconstruction.
  
  
  METHODS
  Twenty unilateral cleft lip and palate patients(15 males,5 females) were chosen to undergo three-dimensional CT scans after alveolar bone graft, region of interest(ROI) volume measurement of GE AW 4.1 software was used to calculate the capacity of alveolar cleft at 1 week, 3 months, 6 months after surgery.
  
  
  RESULTS
  An average bone loss of 35.74% was found after 3 months, 55.89% after 6 months. In labial and palatal direction, labial bony bridge was more obvious than palatal bony bridge.
  
  
  CONCLUSIONS
  Bone resorption is present after alveolar bone graft, and becomes more severe with time going on.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, China. zhangyong1362@163.com
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yu-sheng
authors.initials: YS
authors.lastname: Yang
authors.forename: Yi-lai
authors.initials: YL
authors.lastname: Wu
authors.forename: Yun
authors.initials: Y
authors.lastname: Liang
authors.forename: Guo-min
authors.initials: GM
authors.lastname: Wang
mesh_terms: D064728:Alveolar Bone Grafting; D000539:Alveolar Process; D016025:Bone Transplantation; D002971:Cleft Lip; D002972:Cleft Palate; D005260:Female; D006801:Humans; D008297:Male; D036542:Tomography, Spiral Computed; D014057:Tomography, X-Ray Computed