title: A clinical study of changes in the volume of bone grafts in the atrophic maxilla.
abstract: OBJECTIVE
  To evaluate the volumetric changes in bone grafts to the severely atrophic edentulous maxilla over 6 months.
  
  
  METHODS
  Ten edentulous patients received autogenous bone as buccal onlay grafts to the maxilla and bilaterally particulate bone grafts to the maxillary sinus. Two mm contiguous axial CT scans were obtained 1 to 2 weeks and 6 to 7 months postoperatively. The area of each graft was measured and the volume calculated according to the formula V(graft)=Sigma of areas x the thickness of each section.
  
  
  RESULTS
  The volume of the inlay and onlay grafts was reduced by an average of 49.5 and 47% respectively of the initial volume. The coefficient of variation was greater in the onlay group (0.79) compared with the inlay group (0.38).
  
  
  CONCLUSIONS
  The volumetric changes in buccal onlay and sinus inlay grafts after 6 months of healing seem similar although there was a wide range in both groups.
authors: Department of Surgical Sciences, Oral and Maxillofacial Surgery, Uppsala University Hospital, S 751 85 Uppsala, Sweden.
authors: B
authors: B
authors: Johansson
authors: A
authors: A
authors: Grepe
authors: K
authors: K
authors: Wannfors
authors: J M
authors: JM
authors: Hirsch
mesh_terms: D000368:Aged; D000465:Algorithms; D000540:Alveolar Ridge Augmentation / Q000379:methods; D000704:Analysis of Variance; D001284:Atrophy; D001699:Biometry; D001862:Bone Resorption / Q000000981:diagnostic imaging; D016025:Bone Transplantation / Q000000981:diagnostic imaging* / Q000379:methods; D002138:Calibration; D005260:Female; D005500:Follow-Up Studies; D006085:Graft Survival; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D016014:Linear Models; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008443:Maxillary Sinus / Q000601:surgery; D008875:Middle Aged; D013223:Statistics as Topic; D014057:Tomography, X-Ray Computed; D014182:Transplantation, Autologous; D014945:Wound Healing