Evaluation of Head and Cervical Spine Posture after Therapy with Maxillary Protraction Appliances

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Liu Ting1†; Zhe-Yuan Zhang1†; Yu-Xin Cao;Hee-Moon Kyung; Li Bing & Xiu-Ping Wu


The objective of this study was to evaluate the changes of head and cervical spine posture of skeletal class malocclusion in adolescent with maxillary protraction. Thirty cases of skeletal class malocclusion were randomly selected from the Stomatological Hospital of Shanxi Medical University. High-quality lateral cephalograms were collected including pre- and posttreatment to compare the changes of head and cervical spine posture. Data were processed using SPSS 26.0 statistical software.The paired-t test was used to compare pre- and posttreatment mean angular measurements. A significant difference in the SNA(p<0.001), SNB(p<0.01), and ANB(p<0.001) between T1 and T2 showed an improvement in the sagittal relationships. A significant change was observed in middle cervical spine posture, while upper cervical spine posture variables showed no significant difference after treatment. Skeletal class with maxillary protraction appliance not only led to the improvement of sagittal relationship, but also changed the middle cervical spine posture.

KEY WORDS: Head posture; Cervical spine posture; Skeletal class; Maxillary protraction; Cephalometric measurements.

How to cite this article

LIU, T.; ZHANG, Z. Y.; CAO, Y. X.; KYUNG, H. M.; BING, L. & WU, X. P. Evaluation of head and cervical spine posture after therapy with maxillary protraction appliances. Int. J. Morphol., 41(3):889-893, 2023.