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Dual midfacial distraction osteogenesis for Crouzon syndrome: long-term follow-up study for relapse and growth.

Abstract

PURPOSE

Rigid external distraction osteogenesis is regarded as a standard treatment for congenital midfacial hypoplasia. However, external distraction for the upper portion of the midface is not as effective and tends to rotate the midfacial segment in a counterclockwise direction. Moreover, patients poorly tolerate it because of the device's bulkiness. To prevent such drawbacks of an external distractor, both external and internal distractors were synchronously applied to patients with Crouzon syndrome.

PATIENTS AND METHODS

In 6 patients with Crouzon syndrome in whom a dual-distraction technique was applied, distraction of the midfacial region was performed for up to a mean length of 15.3 mm. The external distractor was removed after a 1-month consolidation period, but the internal distractor was maintained for more than 6 months. The degree of advancement of the midface and ossification was measured with lateral cephalometry and 3-dimensional computed tomography imaging, respectively.

RESULTS

At long-term follow-up (mean, 4.6 years), the facial contours retained the initial distraction geometry with almost no relapse, showing that the ideal facial contour and occlusion could be obtained. Bone deposition was found to be continually progressing even 6 months postoperatively, and more than 6 months of consolidation was required for complete ossification that mainly occurred in the pterygomaxillary junction and lateral orbital wall.

CONCLUSIONS

The dual-distraction technique can induce balanced growth without the recurrence of hypoplasia, and it may eventually yield satisfactory outcomes in Crouzon syndrome.

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  • Publisher Full Text
  • Authors

    Lee DW, Ham KW, Kwon SM, Lew DH, Cho EJ

    Source

    MeSH

    Adolescent
    Cephalometry
    Child
    Craniofacial Dysostosis
    External Fixators
    Facial Bones
    Female
    Follow-Up Studies
    Humans
    Internal Fixators
    Male
    Maxillofacial Development
    Osteogenesis, Distraction
    Retrospective Studies
    Secondary Prevention
    Treatment Outcome

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    22374067