The use of xenografts to prevent inferior border defects following bilateral sagittal split osteotomies: three-dimensional skeletal analysis using cone beam computed tomography

H. C. van der Helm*, J. Kraeima, T. Xi, J. Jansma, R. H. Schepers

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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The aim of this retrospective study was to investigate grafting in the osteotomy gap during bilateral sagittal split osteotomy (BSSO), using a xenograft and fibrin glue. Hard tissue defects in the inferior mandibular border were assessed using cone beam computed tomography scans taken 1 week and 1 year postoperatively. The study group of 20 patients underwent bone grafting during BSSO (mean age 26.1 years; mean horizontal displacement 8.5 mm) and the control group of 20 patients did not (mean age 30.2 years; mean horizontal displacement 7.6 mm). The mean height of the mandibular defects was significantly lower in the study group, but there was no significant difference in volume measurements between the groups. Grafting had a negligible effect on large displacements (9.0-15.0 mm), which might have been due to an inadequate amount and/or positioning of the graft, or to poor dimensional stability. This may be resolved by improved graft positioning or by using a different kind of (xeno)graft.

Original languageEnglish
Pages (from-to)1029-1035
Number of pages7
JournalInternational Journal of Oral and Maxillofacial Surgery
Issue number8
Publication statusPublished - Aug-2020


  • orthognathic surgery
  • orthognathic surgical procedures
  • bilateral sagittal split osteotomy
  • mandibular inferior border
  • bone transplantation
  • three-dimensional imaging
  • BONE
  • BIO-OSS(R)

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