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[Case report of maxillary protrusion].

S Yamamoto, J Wakayama, T Usuki

    Gifu Shika Gakkai Zasshi = the Journal of Gifu Dental Society
    |December 1, 1989
    PubMed
    Summary
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    This case study shows successful orthodontic treatment for a boy with maxillary protrusion and open bite. Treatment involved premolar extraction and comprehensive appliance therapy, achieving a functional occlusion and improved facial profile.

    Area of Science:

    • Dentistry
    • Orthodontics
    • Craniofacial Biology

    Background:

    • Maxillary protrusion and horizontal open bite are complex malocclusions requiring tailored treatment strategies.
    • Accurate cephalometric analysis is crucial for diagnosing and planning treatment for skeletal and dental discrepancies.

    Observation:

    • A 10-year, 7-month-old boy presented with maxillary protrusion (pseudo class I malocclusion), horizontal open bite, and space deficiency.
    • Cephalometric analysis revealed Point A at +3.0 mm and Pogonion at -8.0 mm relative to the McNamara line.

    Findings:

    • Four first premolars were extracted to facilitate treatment.
    • A 3-year orthodontic treatment regimen included an edgewise appliance, high-pull headgear, palatal bar, and various elastics (Class III, Class II, up-down).

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  • The treatment resulted in a functional occlusion, improved facial profile, and effective control of vertical growth and tooth movement.

    • Implications:

    • Comprehensive orthodontic treatment can effectively manage complex malocclusions like maxillary protrusion with open bite.
    • Multidisciplinary appliance use, including extractions and elastics, is key to achieving favorable skeletal and dental outcomes.
    • Successful treatment contributes to improved aesthetics, function, and long-term occlusal stability.