Three-dimensional stability analysis of maxillomandibular advancement surgery with and without articular disc repositioning.
J Craniomaxillofac Surg
; 46(8): 1348-1354, 2018 Aug.
Article
em En
| MEDLINE
| ID: mdl-29866436
This retrospective cohort study aimed to assess, three-dimensionally, mandible and maxilla changes following maxillomandibular advancement (MMA), with and without repositioning of TMJ articular discs. The sample comprised cone-beam computed tomography data from 32 subjects: group 1 (n = 12) without disc displacement and group 2 (n = 20) with bilateral disc repositioning. An automatic cranial base superimposition method was used to register the images at three time points: T1 (preoperative), T2 (postoperative), and T3 (at least 11 months follow-up). To assess surgical changes (T2-T1) and adaptive responses (T3-T2), the images were compared quantitatively and qualitatively using the shape correspondence method. The results showed that surgical displacements were similar in both groups for all the regions of interest except the condyles, which moved in opposite directions - group 1 to superior and posterior positions, and group 2 to inferior and anterior positions. For adaptive responses, we observed high individual variability, with lower variability in group 2. Sagittal relapse was similar in both groups. In conclusion, there were no significant differences in skeletal stability between the two groups. The maxillomandibular advancement surgeries, with rotation of the occlusal plane, had stable results for both groups immediately after surgery and at 1-year follow-up.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Disco da Articulação Temporomandibular
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Avanço Mandibular
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Mandíbula
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Maxila
Tipo de estudo:
Observational_studies
Limite:
Adolescent
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Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Craniomaxillofac Surg
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article