Static and dynamic changes of natural head position improve vertical eye canting of patients with non-syndromic asymmetric facial deformities after orthognathic surgery
Year: 2026
Type: article
Abstract: Objective: By combining static and dynamic methods of obtaining natural head position, this study examined whether compensatory head tilt in patients with non-syndromic asymmetric facial deformities contributes to of pseudo-"vertical eye canting". Methodology: Patients with non-syndromic asymmetric facial deformities patients and symmetric dento-maxillofacial deformity who met the inclusion and exclusion criteria were divided into observation and control groups. Static photographs were measured to analyze the static head position of the subjects in each follow-up period; dynamic natural head positions of the subjects in different states in each period were recorded by posture sensors for dynamic analysis. Intergroup and intragroup changes were analyzed with Mann-Whitney U-test and one way ANOVA. Results: The static natural head position of the observation group at 1 year after surgery was significantly different from that of the pre-surgery period, whereas each dynamic natural head position at all follow-up periods after surgery was significantly different from dynamic natural head position of the pre-surgery period. The range of dynamic head position in the rolling direction was smaller in the observation group than in the preoperative period at 6 months and 1 year after surgery, but the dynamic head position range in the rolling direction was not significantly different in the control group at the different follow-up stages. Conclusions: Changes in natural head position (NHP) following orthognathic surgery were associated with improved stabilization of head posture in roll orientation and reduced pseudo-eye canting in non-syndromic asymmetric facial deformities (NSAFD) patients. Clinical Trial Number KQEC-2021-58-01.
Source: Frontiers in Surgery
Authors: Wei Sun, Tianyu Zhao, Yuxin Tang, Xiang Li, Siyong Gao, Guangsen Zheng
Institution: Sun Yat-sen University
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,801
OpenAlex ID: W7118441175