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Influence of temporomandibular joint disc displacement on mandibular advancement in patients without pre-treatment condylar resorption.
- Source :
-
International journal of oral and maxillofacial surgery [Int J Oral Maxillofac Surg] 2017 Mar; Vol. 46 (3), pp. 328-336. Date of Electronic Publication: 2016 Dec 12. - Publication Year :
- 2017
-
Abstract
- The purpose of this study was to clarify the correlation between pre-treatment anterior disc displacement and mandibular stability after orthognathic and orthodontic treatment among patients with a skeletal class II malocclusion and without pre-treatment condylar resorption. Thirty-seven patients were included (7 male, 30 female). The mean length of follow-up was 6.76±3.06 years. Patients with condylar resorption before treatment were excluded. Magnetic resonance images and lateral cephalometric radiographs were taken before treatment (T0), after treatment (T1), and at follow-up (T2). Patients were classified according to the degree of disc displacement: -10-10° 'normal', 11-50° 'slight to mild', ≥51° 'moderate to severe'. Results showed the condyle moved posterosuperiorly after treatment, and then moved anteriorly to a more concentric location during the long follow-up period. Condylar movement was found not to correlate with disc displacement. The degree of disc displacement before treatment did not correlate with the post-surgical mandibular positional change in either the sagittal or vertical direction. To conclude, the mandibular bilateral sagittal split ramus osteotomy was stable in the long-term after orthognathic and orthodontic treatment. In the absence of pre-treatment condylar resorption, the degree of initial anterior disc displacement did not have a significant influence on the stability of mandibular advancement.<br /> (Copyright © 2016 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.)
- Subjects :
- Adult
Bone Resorption pathology
Cephalometry
Female
Humans
Image Interpretation, Computer-Assisted
Magnetic Resonance Imaging
Male
Mandibular Condyle pathology
Treatment Outcome
Malocclusion, Angle Class III pathology
Malocclusion, Angle Class III surgery
Mandibular Advancement
Temporomandibular Joint Disc pathology
Temporomandibular Joint Disc surgery
Temporomandibular Joint Disorders pathology
Temporomandibular Joint Disorders surgery
Subjects
Details
- Language :
- English
- ISSN :
- 1399-0020
- Volume :
- 46
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- International journal of oral and maxillofacial surgery
- Publication Type :
- Academic Journal
- Accession number :
- 27637317
- Full Text :
- https://doi.org/10.1016/j.ijom.2016.08.011