Type of maxillary segment mobilization affects three-dimensional nasal morphology

Summary Background Surgical mobilization of the maxillary segment affects nasal morphology. This study assessed the impact of the type of maxillary mobilization on the three-dimensional (3D) nasal morphometry. Methods Pre- and postsurgery cone-beam computed tomography-derived facial image datasets of consecutive patients who underwent two-jaw orthognathic surgery were reviewed. Using preoperative 3D facial models as the positional reference of the skeletal framework, 12-month postoperative 3D facial models were classified into four types of maxillary mobilizations (advancement [n=83], setback [n=24], intrusion [n=55], and extrusion [n=52]) and four types of final maxillary positions (anterosuperior [n=44], anteroinferior [n=39], posterosuperior [n=11], and posteroinferior [n=13]). Six 3D soft tissue nasal morphometric parameters were measured, with excellent intra- and interexaminer reliability scores (ICC>0.897) for all the measurements. The 3D nasal change for each nasal parameter was computed as the difference between postoperative and preoperative measurement values. Results The intrusion maxillary mobilization resulted in a significantly (all p 0.05) difference was observed between advancement and setback maxillary mobilizations. The anterosuperior and posterosuperior maxillary positions had a significantly (all p Conclusion The type of maxillary mobilization affects the 3D nasal morphometry.