Virtual Surgical Analysis: Long-Term Cone Beam Computed Tomography Stability Assessment of Segmental Bimaxillary Surgery

Michael Boelstoft Holte, Alexandru Diaconu, Janne Ingerslev, Jens Jørgen Thorn, Else Marie Pinholt*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The assessment of the stability of orthognathic surgery is often time-consuming, relies on manual re-identification of anatomical landmarks, and has been based on short-term follow-up. The purpose of this study was to propose and validate a semi-automated approach for three-dimensional (3D) assessment of the long-term stability of segmental bimaxillary surgery. The approach was developed and validated using cone beam computed tomography scans obtained at 2 weeks and 2 years postoperative. The stability of the surgical outcome was calculated as 3D translational and rotational differences between the short- and long-term postoperative positions of the individual bone segments. To evaluate reliability, intra-class correlation coefficients were calculated at a 95% confidence interval on measurements of two observers. Ten class II and III patients (six male, four female; mean age 24.4 years), who underwent a combined three-piece Le Fort I osteotomy, bilateral sagittal split osteotomy, and genioplasty, were included in the study. Intra- and inter-observer reliability were excellent (range 0.82–0.99). The range of the mean absolute difference of the intra- and inter-observer translational and rotational measurements were 0.14 mm (0.13)–0.44 mm (0.50) and 0.20° (0.16)–0.92° (0.78). The approach has excellent reliability for 3D assessment of long-term stability of segmental bimaxillary surgery.

Original languageEnglish
JournalInternational Journal of Oral and Maxillofacial Surgery
Volume51
Issue number9
Pages (from-to)1188-1196
ISSN0901-5027
DOIs
Publication statusPublished - Sept 2022

Keywords

  • computer-assisted surgery
  • genioplasty
  • mandibular osteotomy
  • maxillary osteotomy
  • orthognathic surgery
  • three-dimensional imaging

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