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Revista chilena de anatomía

versión impresa ISSN 0716-9868


HENRIQUEZ, J.; SANDOVAL, P.  y  FUENTES, R.. RADIOLOGICAL ANATOMY OF THE HYOID BONE. Rev. chil. anat. [online]. 2000, vol.18, n.1, pp.117-124. ISSN 0716-9868.

The hyoid bone study is of great clinical importance, because of their relationship attributed to the function of the stomatognatic and respiratory systems. Several authors point the hyoid as an active participant in the erect posture of the head.In this work the radiological anatomy of the hyoid bone is analyzed in 46 random choice students, 26 females and 20 males at the Universidad de La Frontera. The average age was 19 years and 6 months.This study was based on the analysis of individual profile teleradiography taken under mandibular rest. In them it was performed sketches and cephalometric measurement orientated in a true vertical and horizontal lines, besides reference points, planes and craniofacial angles. The sample was divided in two groups according to their skeletal characteristics. The greater horns were observed separately in 56,6% of the individual. This fact indicated a rotation in the coronal plane at the sagittal axis. By other side the lesser horns was difficult to be observed. The body presents a variety of ovoid form with marked radiopaque zones, with or without radiolucent centers, their orientation presents a 64 degrees angle from the true horizontal line. The hyoid bone orientation is 19 degrees (SD 7,8) respect to the true horizontal line, with the greater horns located upper to main body and 34 degrees (SD 8,5) respect to the Sella-Nasion plane. Their average position is found 36 mm (SD 5,0) away from the cervical column, 8 mm in front of the vertical pterygoid, 108 mm from the sella turcica, 4 mm under the third cervical vertebrae and 14 mm of the mandibular plane. This work allows us to conclude the existence of a variation respect to position and orientation of the hyoid bone in young adults where we found the distance between the hyoid and the cervical column as the most conservative

Palabras clave : Hyoid bone; Radiological anatomy; Cephalometric analysis.

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