Postura corporal y maloclusión

Figura 1                
   
Figura 2
      

ENLACE : Corregir la postura


ESTUDIO DE LAS VÉRTEBRAS CERVICALES EN PACIENTES CON MALOCLUSIONES USANDO LA POSICIÓN NATURAL DE LA CABEZA

           Esta investigación tuvo como objetivo describir la relación existente entre los diferentes tipos de maloclusiones de Angle y la posición de las dos primeras vértebras cervicales. Los resultados señalaron una posible asociación de las vértebras estudiadas con el plano mandibular y con el plano oclusal, aunque con marcadas diferencias entre los valores obtenidos, lo cual requiere una mayor profundización de la relación entre las variables estudiadas.

          Por otra parte, se observó que las radiografías cefálicas laterales eran tomadas con una posición forzada de la columna cervical mediante la tracción de la cabeza en sentido vertical con el uso de las olivas posicionadoras del cefalostato. Por lo tanto, se obtiene una postura obligada con disminución de la curvatura cervical, en donde no se mantiene la posición natural de la cabeza y la columna cervical.  

María del Carmen Díaz Ávila. Odontólogo especialista en ortopedia Dentofacial

Profesora contratada: Asignatura Oclusión. Facultad de Odontología,

Universidad de Carabobo

Tomado de : ODOUS Cientíica. Revista de la Facultad de Odontología de la Universidad de Carabobo.

Morfología de la ATM en maloclusiones Clase II división 2

Morphology of the temporomandibular joint in subjects with Class II Division 2 malocclusions.

Katsavrias EG.

SourceDepartment of Orthodontics, School of Dentistry, University of Athens, Athens, Greece. elkats@Otenet.gr

Abstract

INTRODUCTION: Temporomandibular joint (TMJ) morphology has not been studied adequately in subjects with various types of malocclusion, and it is not known if TMJ morphology and facial morphology are related. Such knowledge might assist in the establishment of biological treatment strategies, especially when the TMJ is the target of the treatment plan. The aim of this study was to explore the morphological characteristics of the TMJ in subjects with skeletal Class II Division 2 malocclusions.

METHODS: The material consisted of corrected lateral tomograms of 94 joints in 47 subjects with Class II Division 2 malocclusions (age range, 8.3-42.8 years). The subjects were divided into 5 groups according to age.

RESULTS: Intragroup comparisons showed statistically significant differences for condylar angle, condylar position, eminence height, eminence inclination, ramus height, and condylar-neck height. These differences were found mainly between the youngest and oldest groups. The Pearson correlation coefficient was greater than 0.60 for eminence height and eminence inclination, eminence height and ramus inclination, eminence inclination and ramus inclination, fossa posterior-eminence midpoint and fossa posterior-eminence top, and fossa posterior-eminence midpoint and fossa posterior-fossa roof. Condylar shape was most often round, followed by oval, flattened, and triangular; fossa shape was most often oval, followed by triangular, trapezoidal, and round.

CONCLUSIONS: The results suggest that (1) fossa morphology and condylar length attain their final sizes early; (2) articular eminence and ramus morphology (height, inclination) have great variability; (3) some joint components such as eminence height with eminence inclination, eminence height with ramus inclination, eminence inclination with ramus inclination, and fossa anteroposterior dimensions are highly correlated with each other; and (4) the most prevalent condylar and fossa anteroposterior shape is oval.

Tomado de : Am J Orthod Dentofacial Orthop. 2006 Apr;129(4):470-8