New details on the clefted uvular muscle: analyzing its role at histological scale by model-based deformation analyses.
Cleft Palate Craniofac J
; 49(1): 51-9, 2012 Jan.
Article
en En
| MEDLINE
| ID: mdl-21812575
ABSTRACT
OBJECTIVE:
As an initial step to a complex reconstruction model for virtual surgery, the present study was carried out to provide data on the prenatal cleft lip and palate uvular muscle in eight specimens.METHOD:
Serial sections of viscerocrania of 18 aborted embryos and fetuses were studied microscopically and segmented manually. Registration, three-dimensional reconstruction, and finite element analyses were conducted.RESULTS:
Incompletely clefted uvulae showed anterior fusion and dorsal fission of the bilateral uvular muscle bodies. A complete cleft lip and palate specimen evidenced single bilateral uvular muscle bodies lying medially and orally below the cleft shelf, its central longitudinal fibers running beneath the oral-median mucosa. In incompletely clefted uvulae, 10% to 50% of circular peripheral fibers crossed the midline within the central third of the anterioposterior muscle, behind the levator loop. Of the fibers, 30% to 60% crossed to the ipsilateral palatopharyngeus muscle. Fibers inserted into the uvular basal membrane in a 60% nasal and 40% oral distribution at the middle third of the macroscopically clefted uvula. The macroscopic uvula itself consisted of loose connective tissue and salivary glands. Deformation analysis did disclose local stress, suggesting the uvular muscle contributes to velopharyngeal closure in normal anatomy and extends the cleft edges in cleft palate.CONCLUSION:
Cleft lip and palate reconstruction should reasonably use the uvular muscle to augment the velar midline bulk. Uvular muscle deformation calculation was successful, permitting functional insight on the basis of microanatomical specimens, so far a bigger complete velar model can be ventured.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Músculos Palatinos
/
Músculos Faríngeos
/
Úvula
/
Análisis de Elementos Finitos
/
Feto
Límite:
Humans
Idioma:
En
Revista:
Cleft Palate Craniofac J
Asunto de la revista:
ODONTOLOGIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Alemania