Positional and morphologic changes of the mandibular condyle after mandibular distraction osteogenesis in skeletal class II patients.

Yuko Azumi, Junji Sugawara, Ichiro Takahashi, Hideo Mitani, Hiroshi Nagasaka, Hiroshi Kawamura

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

AIM: Mandibular distraction osteogenesis has been used to correct the skeletal problems in patients with severe mandibular deficiency. Short-term effects of mandibular distraction osteogenesis on condylar position, condylar morphology, and temporomandibular joint symptoms in patients with severe skeletal Class II malocclusions were evaluated. MATERIAL AND METHODS: The records of 13 patients who had undergone bilateral mandibular lengthening and/or midline mandibular widening were analyzed. Pre- and postoperative positional changes of the mandibular condyle in the glenoid fossa, the axial rotation of the condylar head, and the temporomandibular joint symptoms were evaluated. RESULTS: Most of the condyles were displaced in an upward and backward direction in the glenoid fossa; the amount correlated with the amount of mandibular lengthening. Resorption was observed in 20% of condyles; the incidence of the resorption correlated with incidence of preoperative articular disc displacement and with the amount of condylar displacement. CONCLUSION: Distraction protocols should be performed with particular attention when patients with articular disc displacement require a large amount of distraction.

Original languageEnglish
Pages (from-to)32-39
Number of pages8
JournalWorld journal of orthodontics
Volume5
Issue number1
Publication statusPublished - Jan 1 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Medicine(all)

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