Rajamanickam Preethi, Varghese Remmiya Mary, Kishore Shreya
Post Graduate Student, Senior Lecturer, Department of Orthodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India.
Assistant Professor, SRM Dental College, Bharathi Salai, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India.
J Orthod Sci. 2024 Nov 25;13:51. doi: 10.4103/jos.jos_121_23. eCollection 2024.
Skeletal Class II malocclusion patients frequently exhibit an extended craniocervical position. The study's objective was to evaluate how the craniocervical posture has changed following skeletal class II correction using the Forsus fatigue-resistant device (FFRD).
A retrospective analysis was undertaken using the pre- and post-treatment records of 35 skeletal class II patients who used the FFRD to achieve class II correction. The metrics suggested by Solow and Rocabado were used to evaluate the cranial and cervical positions. Eleven angular parameters were evaluated to determine the relationship between the mandibular ramus and the skull as well as the upper and middle craniocervical positions. To compare the parameters before and after fixed functional therapy, a Wilcoxon signed rank test was used.
Significant differences were obtained in the parameters SNA, SNB, and ANB post-FFRD. Significant differences were also noted in NL/OPT, NSL/OPT, FH/CVT, FH/OPT, NSL/CVT, NL/CVT, ML/CVT, FH/RL, and oropharynx position.
The upper and middle craniocervical posture altered significantly with the FFRD. Skeletal class II correction obtained with FFRD delivered the patients a more erect craniocervical posture.
骨性II类错牙合患者常表现出颅颈位置延长。本研究的目的是评估使用Forsus抗疲劳装置（FFRD）矫正骨性II类错牙合后颅颈姿势的变化情况。
对35例使用FFRD实现II类错牙合矫正的骨性II类患者的治疗前后记录进行回顾性分析。采用Solow和Rocabado提出的指标评估颅骨和颈椎位置。评估11个角度参数，以确定下颌升支与颅骨以及上、中颅颈位置之间的关系。为比较固定功能治疗前后的参数，采用Wilcoxon符号秩检验。
FFRD治疗后SNA、SNB和ANB参数有显著差异。在NL/OPT、NSL/OPT、FH/CVT、FH/OPT、NSL/CVT、NL/CVT、ML/CVT、FH/RL和口咽位置也有显著差异。
FFRD使上、中颅颈姿势发生显著改变。使用FFRD矫正骨性II类错牙合使患者的颅颈姿势更加直立。
