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Condylar position and mandibular function after bilateral sagittal split osteotomy.

D Hirjak, B Dvoranova, J P Reyneke

    Bratislavske Lekarske Listy
    |June 3, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Bilateral sagittal split osteotomy (BSSO) resulted in minimal condylar displacement and functional changes within 6-12 months. Mandibular function recovery was faster with setback procedures compared to advancement.

    Keywords:
    bilateral sagittal split osteotomy (BSSO)condylar positioncondylar sag temporomandibular joint (TMJ).mandibular function

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    Area of Science:

    • Oral and Maxillofacial Surgery
    • Orthognathic Surgery

    Background:

    • Bilateral sagittal split osteotomy (BSSO) is a common procedure for correcting mandibular deformities.
    • Assessing postoperative condylar position and mandibular function is crucial for evaluating surgical outcomes.

    Purpose of the Study:

    • To evaluate postoperative condylar positional changes and mandibular function after BSSO with manual proximal segment positioning.
    • To compare outcomes between mandibular advancement and setback procedures.

    Main Methods:

    • Retrospective study of 45 patients undergoing BSSO, divided into advancement (G1) and setback (G2) groups.
    • Postoperative condylar position assessed via CT scans at a minimum of 6 months.
    • Mandibular function evaluated by maximal interincisal opening (MIO).

    Main Results:

    • Condylar positional changes in axial and sagittal planes were minimal and not significantly different between groups.
    • Mandibular function recovery was faster in the setback group (G2) compared to the advancement group (G1).
    • Preoperative mandibular function levels were nearly restored within 6-12 months postoperatively for both groups.

    Conclusions:

    • Bilateral sagittal split osteotomy (BSSO) leads to insignificant condylar displacement and functional changes within 6 to 12 months.
    • Manual proximal segment positioning appears to yield stable condylar results.
    • The rate of functional recovery varies between advancement and setback osteotomies.