title: Computer-assisted zygoma reconstruction with vascularized iliac crest bone graft.
abstract: BACKGROUND
  The reconstruction of zygoma is a challenge with regard to aesthetic and reconstructive demands.
  
  
  METHODS
  Pre-operative CT data were imported into specific surgical planning software. The mirror-imaging technique was used. A surgical guide transferred the virtual surgery plan to the operation site, whereby it fitted uniquely to the iliac donor site. A postoperative CT scan was obtained for comparing the actual postoperative graft position and shape with the pre-operative virtual simulation.
  
  
  RESULTS
  A mean difference of 0.71 mm (SD ± 1.42) for the shape analysis and 3.53 mm (SD ± 3.14) for the graft position was determined. The calculation of the closest point distance showed a surface deviation of < 2 mm for the shape analysis with 83.6% of values and for the graft position with 35.7% of values.
  
  
  CONCLUSIONS
  Virtual surgical planning is a suitable method for zygoma reconstruction with vascularized iliac crest bone graft, with good accuracy for restoring the three-dimensional anatomy.
authors: Department of Oral, Maxillofacial and Plastic Facial Surgery, RWTH Aachen University Hospital, Germany.
authors: Ali
authors: A
authors: Modabber
authors: Marcus
authors: M
authors: Gerressen
authors: Nassim
authors: N
authors: Ayoub
authors: Dirk
authors: D
authors: Elvers
authors: Jan-Philipp
authors: JP
authors: Stromps
authors: Dieter
authors: D
authors: Riediger
authors: Frank
authors: F
authors: Hölzle
authors: Alireza
authors: A
authors: Ghassemi
mesh_terms: D064595:Composite Tissue Allografts / Q000000981:diagnostic imaging / Q000637:transplantation*; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging / Q000637:transplantation*; D008297:Male; D011859:Radiography; D019651:Plastic Surgery Procedures / Q000379:methods*; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome; D015051:Zygomatic Fractures / Q000000981:diagnostic imaging / Q000652:urine*
keywords: computer-assisted surgery; surgical guide; vascularized iliac crest bone graft; virtual planning; zygomatic reconstruction