The Treatment Effects of Maxillary Protraction in Isolated Cleft Palate Patients

DOI 4 Citations 20 References
  • IRIE Jogen
    Hokkaido University, Graduate School of Dentistry, Department of Oral Functional Science, Section of Orthodontics
  • ISHIKAWA Hiroyuki
    The Department of Orthodontics, Fukuoka Dental College
  • IIDA Junichiro
    Hokkaido University, Graduate School of Dentistry, Department of Oral Functional Science, Section of Orthodontics

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  • 口蓋裂患者における上顎前方牽引装置の治療効果

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Abstract

This study investigated the treatment effects of maxillary protraction in isolated cleft palate patients with the Hellman's dental stage of III A. Thirty-seven children (10 boys and 27 girls) with isolated cleft palate were examined. seventeen children (7 boys and 10 girls) were treated with a maxillary protraction appliance (MPA group), and 20 (3 boys and 17 girls) underwent chin cap therapy (CC group). Lateral cephalograms were used to analyze skeletal changes during 2 years of treatment in both groups. For 7 of the MPA group children (3 boys and 4 girls), cephalograms at a deciduous dentition stage were also used, to compare maxillary growth changes between the deciduous dentition stage and the treatment periods.<BR>The following results were obtained:<BR>1) From comparison of the pretreatment skeletal patterns between both groups, the MPA group showed more severe jaw discrepancy due to more anterior positioning of the mandible than the CC group. However, there were no significant differences in maxillary morphology between the two groups.<BR>2) During the treatment, the MPA group showed greater forward displacement of the maxilla, as well as a more forward growth direction, than the CC group, but there were no significant differences in the jaw relationships and mandibular position.<BR>3) Cases showing stronger forward growth of the maxilla during the deciduous dentition period still have maxillary forward growth potential during maxillary protraction. This suggested that effects of maxillary protraction in isolated cleft palates depend on individual growth characteristics of the maxilla.

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