Comparison of natural head position in different anteroposterior XXXX .

@entity1 @entity3233 @entity3232 @entity89 @entity19312
OBJECTIVE: The facial esthetics after orthodontic treatment and orthognathic surgery may be affected by the @entity1 's natural head position. The purpose of this study was to evaluate the natural head position for the three skeletal classes of @entity3232 . MATERIALS AND METHODS: Our sample consisted of 102 lateral cephalometric radiographs of @entity1 aged 15 to 18 years; class I (n=32), class II (n=40) and class III (n=30). Nine landmarks of the craniofacial skeleton and three landmarks of the cervical vertebrae were determined. Variables consisted of two angles for cervical posture (OPT/Hor and @entity19312 /Hor), three angles for craniofacial posture (SN/Ver, PNS-ANS/Ver, and ML/Ver ) and five for craniofacial angulation (SN/OPT, SN/ @entity19312 , PNS-ANS/OPT, PNS-ANS/ @entity19312 , ML/ @entity19312 ). The data were analyzed statistically using ANOVA and post hoc tests. RESULTS: PNS-ANS/Ver and SN/Ver differed significantly (p<0.05) among the three groups. There were no significant differences between class I and class II @entity3232 for the indicator angles of cranial posture except for ML/Ver. The SN/ @entity19312 was significantly different for class I compared to class III @entity1 . A head posture camouflaging the underlying skeletal class III was observed in our population. CONCLUSION: A more forward head posture was observed in skeletal class III @entity1 compared to skeletal class I and II and that class III @entity1 tended to incline their head more ventral compared to class I @entity1 . These findings may have implications for the amount of @entity89 during surgery particularly in @entity1 with a @entity3233 .
