No abstract

No abstract

Introduction: Orthodontists and surgeons have been looking for more accurate methods to plan and predict surgical outcomes in patients with skeletal discrepancies. Methods: The sample consisted of 20 subjects from the surgical clinic of a graduate orthodontic program who had been treated with Le Fort I maxillary movement, bisagittal split osteotomy, with or without genioplasty. All subjects had to have preoperative (T0) and at least 6 months postoperative (T1) cone-beam computed tomographies that were imported to Dolphin three-dimensional (3D) software version 11.9 in digital imaging and communications in medicine format. Three-dimensional voxel-based superimposition on the cranial base was performed for T0 and T1 to accurately measure the skeletal surgical movements. A virtual orthognathic surgery was performed on T0 to mimic the actual skeletal osteotomies using the treatment simulation tool in Dolphin 3D. A prediction 3D soft tissue image (Tp) was generated based on the Dolphin virtual skeletal planning. The differences between Tp and T1 for all patients were measured using linear and angular measurements visualized by surface mapping. Results: Significant differences were found between Tp and T1 in Nasolabial angle, Soft tissue A point, and Subalar area. Conclusions: The soft tissue prediction accuracy after double jaw surgery using Dolphin 3D is limited in some areas, especially upper lip and base of the nose.

Study Objectives: Obstructive sleep apnea (OSA) is a common disorder characterized by collapse of the upper airway during sleep and requires a multidisciplinary management approach. There has yet to be a study that is able to compare a craniofacial (CF) population sample to a sample of the general public that is from a similar clinic setting. The aim of this study was to determine the prevalence of positive OSA screenings in a CF population sample treated in the CF clinic of a dental school, and compare it to a previously collected sample from the orthodontic clinic of the same dental school. 1 Methods: At a tertiary care CF orthodontic clinic in a dental school, children between the ages of 7 to 18 years were screened for OSA using the validated pediatric sleep questionnaire (PSQ) screening tool. An identical study was previously conducted in the orthodontic clinic of the same dental school. 1 Results: Scores from the PSQ were calculated and 21% of our sampled CF population was considered to be at high risk. However, the PSQ scores of the patients seeking orthodontic treatment in the core clinic were previously calculated and only 7% were considered to be at high risk of OSA. 1 Conclusions: Compared to the general pediatric population, patients with CF anomalies are three times more likely to be considered at high risk for OSA. CF orthodontists must administer PSQs as part of their medical record taking, and be well trained in both dental and nondental management of patients with potential OSA.