Biomechanical analysis of the effect of intracranial pressure on the orbital distances in trigonocephaly

Tomohisa Nagasao, Junpei Miyamoto, Hua Jiang, Tsuyoshi Kaneko, Tamotsu Tamaki

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Objective: This biomechanical study aims to elucidate differences in how skulls with trigonocephaly, normal skulls, and postoperative trigonocephalic skulls respond to intracranial pressure and how this affects the orbital distances. Materials and Methods: For 10 patients with trigonocephaly (8.2 ± 4.5 months), simulation models were produced based on the computed tomographic data of the skulls. These models were categorized as the Trigono group. For each model, a 15-mm Hg pressure was applied to the neurocranium to simulate the intracranial pressure. The interorbital distances expanded in response to the applied pressure. The amount of the change in the orbital distance was calculated using finite element analysis. The same processes were repeated for 10 models simulating normal skulls (the Control group) and postoperative trigonocephalic skulls (the Remodeled group). The changes in the orbital distance were compared among the three groups. Results: The changes in the orbital distance were significantly smaller for the Trigono group than for the Control group. However, changes were significantly greater for the Remodeled group than for the Control group. Conclusion: The expansion of interorbital distances in response to the cranial pressure is restricted in skulls with trigonocephaly. This restriction is eliminated by performing remodeling of the skull. These findings explain why spontaneous correction of hypotelorism occurs postoperatively in trigonocephaly.

Original languageEnglish
Pages (from-to)190-196
Number of pages7
JournalCleft Palate-Craniofacial Journal
Issue number2
Publication statusPublished - 2011 Mar
Externally publishedYes


  • Biomechanics
  • Craniosynostosis
  • Etiology
  • Skull
  • Trigonocephaly

ASJC Scopus subject areas

  • Oral Surgery
  • Otorhinolaryngology


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