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Morphologic study of mandibular outer cortex osteotomy.

Yan-Feng Zhao1, Xiao-Jing Liu, Yun-Fei Hao

  • 1Beijing and Dalian, China From the Department of Maxillofacial Surgery, Dalian City Central Hospital; Department of Craniomaxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Science, Peking Union Medical College; and School and Hospital of Stomatology, Peking University.

Plastic and Reconstructive Surgery
|October 2, 2008
PubMed
Summary
This summary is machine-generated.

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Mandibular outer cortex osteotomy effectively reduces lower face width. Postoperative masseter muscle activity restriction is recommended to prevent bone overgrowth in the mandibular angle area.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Plastic Surgery
  • Anatomy

Background:

  • Mandibular outer cortex osteotomy is a surgical procedure.
  • Understanding its effects on mandibular morphology is crucial.

Purpose of the Study:

  • To illustrate the morphologic changes of the mandible after outer cortex osteotomy.
  • To evaluate bone regeneration and volume changes post-procedure.

Main Methods:

  • Ten patients underwent mandibular outer cortex osteotomy.
  • Three-dimensional spiral computed tomography was used for evaluation.
  • True-up and dissection techniques assessed outcomes at 6 months.

Main Results:

  • Concavity observed post-osteotomy, particularly in the external oblique line region (average depth 3.64 mm).

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  • Overall mandibular bone volume decreased by 1.7%, with local area reduction of 55%.
  • Significant bone regeneration (84.6%) occurred by 6 months, mainly in the mandibular angle.

    • Conclusions:

    • Mandibular outer cortex osteotomy effectively reduces lower face width.
    • Postoperative masseter muscle restriction is advised to prevent hyperostosis at the mandibular angle.