Posición esqueletal aplicada a la estética y rejuvenecimiento del tercio inferior facial y cervical: Posición esqueletal aplicada a la estética

The aim of this research was to evaluate the position of
the hyoid bone and its relationship with the mandibular
plane and to relate aspects for the use in diagnosis and
planning of surgical and non-surgical techniques. A
cross-sectional study was designed in 115 subjects who
presented a cone beam computed tomography as a
diagnostic technique. The sagittal position and angle of
the mandibular plane were obtained together with the
vertical and sagittal position of the hyoid bone in relation
to the mandibular plane. Concordance analysis was
used; for categorical variables, a kappa index of 0.90 was
obtained and for continuous variables, an intraclass index
of 0.87 was obtained; in addition, the Spearman test
was used, considering a p value < 0.005 to determine
statistical significance. 71 subjects with skeletal class II
presented greater dimension in HP
Go (p = 0.0001)
and 44 subjects with skeletal class III presented greater
dimension HA-Me and HA-Pog. Mandibular retrognathic
position associated with greater HP
Go distance (p =
0.0001) was observed; there was a correlation between
mandibular plane angulation and HP
Go (p = 0.031) and
HA-Me (p = 0.032) measurements. It can be concluded
that the position of the hyoid bone is related to skeletal
patterns. The retruded mandible has a greater vertical
distance between the hyoid bone and the mandibular
angle and should be integrated in diagnostic processes
for the selection of facial makeover and rejuvenation
techniques.