ABSTRACT
The aim of this study was the development of a statistical model for reliable prediction of Posterior Airway Space (PAS) changes in lateral cephalograms (LCR) of patients after bimaxillary orthognathic surgery. The LCRs of patients who underwent bimaxillary orthognathic surgery were retrospectively analyzed. The anteroposterior dimension of the PAS was measured at three levels in the pre-operative and postoperative LCR: On the nasopharyngeal (SPAS), oropharyngeal (MAS), and hypopharyngeal level (IAS). The data of 139 patients were collected. The following changes of the PAS were measured: in class II patients SPAS: 0.291 mm (SD = 2.570 mm); MAS: 2.444 mm (SD = 2.986 mm); IAS: 0.750 mm (SD = 3.017 mm); in class III patients SPAS: 1.377 mm (SD 3.212 mm); MAS: 0.962 (SD: = 3.135 mm); IAS: 0.370 mm (SD = 3.468 mm). Linear regression analysis showed for class II patients, a significant influence of mandibular movement on MAS (p = 0.049) and a significant effect of maxillary and mandibular movements on SPAS (p = 0.001) and MAS (p = 0.022) in class III patients. The other jaw displacements had no significant impact on the investigated PAS levels. While the presented method does not permit exact prediction of the dimension of the PAS, it is still an easily accessible method of orientation for the surgeon. The surgeon can initiate three-dimensional examinations to provide exact three-dimensional prediction based on this calculation.
Subject(s)
Malocclusion, Angle Class III , Orthognathic Surgery , Orthognathic Surgical Procedures , Humans , Retrospective Studies , Orthognathic Surgical Procedures/methods , Malocclusion, Angle Class III/surgery , Cephalometry/methods , Pharynx/diagnostic imaging , Models, TheoreticalABSTRACT
Since introduction of the first fillers in the 1980s a multitude of substances has been developed and approved for facial contour augmentation and correction of skin defects. Here we present the interesting case of a patient who presented to us with a delayed infection 6 weeks after augmentation of the upper lip with a hyaluronic acid. We observed full convalescence after operative and high-dose antibiotic treatment of the abscesses. Generally speaking, complications after augmentation with resorbable fillers are rare. However, complications might occur even within unexpected time periods and therefore need our special attention.
