Surgical risk factors for condylar resorption after orthognathic surgery
| Autor: | Soon-Jung Hwang, Piet E. Haers, Axel P. Zimmermann, Christian K. Oechslin, Hermann F. Sailer, Burkhardt Seifert |
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| Rok vydání: | 2000 |
| Předmět: |
Adult
Adolescent Rotation Cephalometry medicine.medical_treatment Oral Surgical Procedures Orthognathic surgery Dentistry Mandible Retrognathia Malocclusion Angle Class II Osteotomy Condyle Statistics Nonparametric Condylar resorption stomatognathic system Risk Factors Odds Ratio Medicine Humans Osteotomy Le Fort Displacement (orthopedic surgery) Mandibular Diseases Bone Resorption General Dentistry Osteosynthesis business.industry Mandibular Condyle Craniometry Temporomandibular Joint Disorders medicine.disease Jaw Fixation Techniques Logistic Models Otorhinolaryngology Surgery Female Oral Surgery Malocclusion business Mandibular Advancement |
| Zdroj: | Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics. 89(5) |
| ISSN: | 1079-2104 |
| Popis: | Objective The purpose of this study was to look for surgical risk factors for condylar resorption after orthognathic surgery. Study design Seventeen patients of a group of 452 patients who had undergone orthognathic surgery consecutively and who were in accordance with the inclusion criteria of this study showed postoperative condylar resorption (group I). Preoperative cephalometric characteristics and surgically induced movements of this group were compared with a control group of 17 of 452 patients (group II) in whom postoperative condylar resorption and skeletal relapse did not develop, despite mandibular retrognathism (ANB angle >4 degrees) and high mandibular plane angle (>40 degrees). Results The kind of osteosynthesis used was not significantly different between the 2 groups. The amount of surgical advancements and the vertical movements of the jaws were not significantly different between the 2 groups. However, the distal ( P = .005) and proximal ( P = .007) mandibular segments were rotated significantly further counterclockwise in group I. Surgically induced posterior condylar displacement occurred significantly more frequently (P= .007) in group I. Conclusions Counterclockwise rotation of the distal and proximal mandibular segments and surgically induced posterior condylar displacement seem to be important surgical risk factors for postoperative condylar resorption. Therefore, these movements seem to be contraindicated in patients who are at high risk. |
| Databáze: | OpenAIRE |
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