Influence of posterior cranial base growth on the therapeutic effect of bite jumping appliance. Issue 4 (December 2017)

• Record Type: Journal Article
• Authors: Nakayama, Takahiro; Sekiya, Toshiko; Satomi, Masaru; Sanggrnjanavaich, Seetala; Oikawa, Takasi; Kanzaki, Hiroyuki; Nakamura, Yoshiki
• Is Part Of: Orthodontic waves. Volume 76:Issue 4(2017:Dec.)
• Page Start: 215
• Page End: 220
• Publication Date: 2017-12
• Subjects: Posterior cranial base -- Skeletal class II malocclusion -- Mandibular growth -- Bite jumping appliance; Orthodontics -- Periodicals; Orthodontics -- Periodicals; Orthodontie -- Périodiques; Orthodontie; Périodique électronique (Descripteur de forme); Ressource Internet (Descripteur de forme); 617.643
• DOI: 10.1016/j.odw.2017.09.002
• Languages: English
• ISSNs: 1344-0241

Abstract

Abstract: Objective: Aim of this study was to examine influence of posterior cranial base (PCB) growth on the effect of bite jumping appliances in skeletal Class II malocclusion. Material and methods: Cephalograms at pretreatment (T1) and completion of functional therapy (T2) of twenty-eight skeletal Class II Japanese patients treated with bite jumping appliances were used in this study. All subjects were divided into two groups according to reduction of ANB angle and establishment of Angle Class I molar relationship: improved and non- improved groups. Results: There was a wide range of individual differences in the PCB growth during the treatment period. The changes of Ba(x) and Ba(y) in the PCB growth were highly correlated to the positional changes of Ar respectively, though there were no correlations between Ba(x) and Ba(y), and Ar(x) and Ar(y). The change of Ba(x) between T1 and T2 in improved group was significantly less than that in non-improved group. The change of Ar(x) in the improved group was significant less than that in the non-improved group. Discriminant analysis demonstrated that the change of Ar(x) was the most important factor that influenced the ANB angle (intermaxillary relationship). Conclusion: The results in this study suggest that PCB growth, especially anteroposterior growth evidently influences the effect of bite jumping appliance.