Assessment of ramus, condyle, masseter muscle, and occlusal force before and after sagittal split ramus osteotomy in patients with mandibular prognathism
| Autor: | Mao Miyazaki, Kohei Marukawa, Aya Mukozawa, Katsuhiko Okabe, Etsuhide Yamamoto, Kiyomasa Nakagawa, Yukari Hashiba, Koichiro Ueki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Adult
Dental Stress Analysis Adolescent Cephalometry medicine.medical_treatment Dentistry Mandible Osteotomy Condyle Bite Force Masseter muscle Orthognathic Surgical Procedures Young Adult stomatognathic system medicine Prognathism Humans Postoperative Period General Dentistry Orthodontics business.industry Masseter Muscle Mandibular Condyle Craniometry medicine.disease Bite force quotient Otorhinolaryngology Preoperative Period Surgery Female Oral Surgery business Tomography X-Ray Computed |
| Zdroj: | Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology. 108(5):679-686 |
| ISSN: | 1079-2104 |
| Popis: | 金沢大学医薬保健研究域医学系 Purpose: The purpose of this study was to examine the relationship between the morphologies of the masseter muscle and the ramus and occlusal force before and after sagittal split ramus osteotomy (SSRO) in patients with mandibular prognathism. Patients and methods: The study group consisted of 26 patients with mandibular prognathism. All patients underwent bilateral SSRO as well as 3-dimensional computed tomography on which the masseter muscle, ramus, and condyle were measured preoperatively and at 1 year postoperation. Occlusal force and contact area were also recorded with pressure-sensitive sheets. Results: In the cross-sectional area of the masseter muscle, there were no significant differences between the pre- and postoperative status. However, postoperative ramus width and area were significantly larger than preoperative values (P < .0001). Postoperative right condylar area was significantly larger than the preoperative value (P = .0120). Occlusal force and contact area 1 year after surgery were significantly larger than the preoperative values (P = .0016, P = .0190). Conclusion: This study suggested that the masseter muscle area did not significantly differ from preoperative status 1 year after SSRO, although occlusal force, contact area, and ramus area and width increased significantly 1 year after SSRO. © 2009. |
| Databáze: | OpenAIRE |
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