Stephan Christian Möhlhenrich1, Nicole Heussen2, Mohammad Kamal3, Ulrike Fritz4, Frank Hölzle3, Ali Modabber3. 1. Department of Oral and Maxillofacial Surgery, University Hospital of RWTH Aachen, Aachen, Germany; Department of Orthodontics, University Hospital of RWTH Aachen, Aachen, Germany. Electronic address: Smoehlhenrich@ukaachen.de. 2. Department of Medical Statistics, University Hospital of RWTH Aachen, Aachen, Germany. 3. Department of Oral and Maxillofacial Surgery, University Hospital of RWTH Aachen, Aachen, Germany. 4. Department of Orthodontics, University Hospital of RWTH Aachen, Aachen, Germany.
Abstract
OBJECTIVE: The aim of this study was to compare the contact surface area (CSA) between bony segments after performing 4 different osteotomy techniques for genioplasty. STUDY DESIGN: Virtual genioplasties were done in terms of sliding or chin-shield genioplasty and 1- or 2-tiered genioplasty on computed tomography (CT) data from 42 patients. Advancement or setback genioplasty was simulated at 3, 5, 8, and 10 mm. The resulting bony contact areas were calculated by using software. RESULTS: No statistically differences were found between both 2-tiered techniques at any displacement distance. Significant statistical differences were noticed between 1-tiered genioplasty and corresponding upper and lower osteotomy at 2-tiered genioplasty and between lower osteotomies of both 2-tiered techniques (P < .001). However, at a displacement distance of 8 mm, the CSA of the lower 2-tiered genioplasty was found to be larger than that of the corresponding after 1-tiered genioplasty (P < .001). CONCLUSIONS: From a displacement distance of 8 mm, a relatively larger CSA could be achieved after performing 2-tiered genioplasty technique.
OBJECTIVE: The aim of this study was to compare the contact surface area (CSA) between bony segments after performing 4 different osteotomy techniques for genioplasty. STUDY DESIGN: Virtual genioplasties were done in terms of sliding or chin-shield genioplasty and 1- or 2-tiered genioplasty on computed tomography (CT) data from 42 patients. Advancement or setback genioplasty was simulated at 3, 5, 8, and 10 mm. The resulting bony contact areas were calculated by using software. RESULTS: No statistically differences were found between both 2-tiered techniques at any displacement distance. Significant statistical differences were noticed between 1-tiered genioplasty and corresponding upper and lower osteotomy at 2-tiered genioplasty and between lower osteotomies of both 2-tiered techniques (P < .001). However, at a displacement distance of 8 mm, the CSA of the lower 2-tiered genioplasty was found to be larger than that of the corresponding after 1-tiered genioplasty (P < .001). CONCLUSIONS: From a displacement distance of 8 mm, a relatively larger CSA could be achieved after performing 2-tiered genioplasty technique.
Authors: Stephan Christian Möhlhenrich; Nassim Ayoub; Ulrike Fritz; Andreas Prescher; Frank Hölzle; Ali Modabber Journal: Clin Oral Investig Date: 2016-12-28 Impact factor: 3.573