Sandoval P, Henríquez J, Fuentes R, Cabezas G, Roldán R
Rev Med Chil. 1999 May;127(5):547-55.
Alterations in the head position and in cervical curvature are associated with mandibular dysfunction, an increased vertical occlusal dimension, upper airways obstruction and bad postural behaviors at work among other conditions.
To perform a cephalometric analysis in young adults.
Lateral cervical X-ray examinations were performed in 46 university students (26 female) aged 19 years old as a mean, Cephalometric landmarks and planes reported by Sollow & Tallgren, determined by investigators, were used for radiographic analysis.
The combined error of the method did not exceed 0.9 degree for any studied variable. Mean craniocervical angulations were 102 degrees for OPT-SNL, 109 degrees for CVT-SNL, 94.8 degrees for cranium-C2 and 105 for SN-vertical. There were significant sex differences in craniocervical angulations and these were abnormal in two thirds of subjects studies. The Forward Head Position is characterized by a cervical compensation with head inclination. This abnormal postural position showed a dolichofacial growth and an alteration of hyoid angle.
The craniocervical position appeared to be related to a vertical craniofacial growth pattern.
头部位置和颈椎曲度的改变与下颌功能障碍、垂直咬合距离增加、上呼吸道阻塞以及工作中的不良姿势行为等状况有关。
对年轻成年人进行头影测量分析。
对平均年龄19岁的46名大学生（26名女性）进行颈椎侧位X线检查，由研究者确定的Sollow和Tallgren报告的头影测量标志点和平面用于影像学分析。
该方法对于任何研究变量的综合误差均未超过0.9度。OPT-SNL的平均颅颈角为102度，CVT-SNL为109度，颅骨-C2为94.8度，SN-垂直为105度。颅颈角存在显著的性别差异，并且在三分之二的研究对象中这些角度异常。头前位的特征是伴有头部倾斜的颈椎代偿。这种异常姿势位置表现为长面型生长和舌骨角改变。
颅颈位置似乎与垂直颅面生长模式有关。
