Condylar volume and condylar area in class I, class II and class III young adult subjects

Abstract

AimAim of this study was to compare the volume and the shape of mandibular condyles in a Caucasian young adult population, with different skeletal pattern.Material and methods200 Caucasian patients (15–30 years old, 95 male and 105 females) were classified in three groups on the base of ANB angle: skeletal class I (65 patients), skeletal class II (70 patients) and skeletal class III (65 patients). Left and right TMJs of each subject were evaluated independently with CBCT (Iluma). TMJ evaluation included: condylar volume; condylar area; morphological index (MI). Condylar volumes were calculated by using the Mimics software. The condylar volume, the area and the morphological index (MI) were compared among the three groups, by using non-parametric tests.ResultsThe Kruskal-Wallis test and the Mann Whitney test revealed that: no significant difference was observed in the whole sample between the right and the left condylar volume; subjects in skeletal class III showed a significantly higher condylar volume, respect to class I and class II subjects (p < 0.05); significantly lower condylar volume was observed in class II subjects, respect to class I and class III (p < 0.05). In the whole sample condylar volume (699.8 ± 63.07 mm3 in males and 663.5 ± 81.3 mm3 in females; p < 0.01) as well as condylar surface (423.24 ± 63.03 mm2 in males and 389.76 ± 61.15 mm2 in females; p < 0.01) were significantly higher in males than in females.ConclusionSkeletal class appeared to be associated to the mandibular condylar volume and to the mandibular condylar area in the Caucasian orthodontic population.

Pharyngeal Airway Space in Subjects with Class II and Class III Facial Deformities

“…In some research it has been demonstrated that no important differences are observed in soft tissue when facial class II and class III are compared. In this study we observed some differences in the lower lip position related to the retraced position of the mandible ; furthermore, it has been confirmed that mandible condyle morphology in TMJ (temporo mandibular joint) shows differences when comparing subjects with facial class II or facial class III (Muñoz et al, 2014a(Muñoz et al, , 2014b; this can justify differences in TMJ response after skeletal surgery by physiopathology of the TMJ (Saccucci et al, 2012).…”

Relación Entre el Tamaño Condilar y la Asimetría Facial Transversal en Individuos con Hiperplasia Condilar

“…De hecho, otro estudio de Saccucci et al (2012b) determino que el tamaño y volumen condilar son significativamente diferentes en sujetos clase I, clase II y clase III lo cual puede generar la discusión sobre el papel que cumple el cóndilo en la consecutiva deformidad facial; así, el cóndilo seria capaz de generar o potenciar cierto tipo de deformidades, mientras que por otra parte, las condiciones funcionales podrían acentuar también patologías condilares como en situaciones donde la reducción de la carga oclusal permite la disminución del volumen óseo condilar en ambos sexos y la disminución de la maduración de condrocitos exclusivamente en mujeres (Chen et al 2011). Esta información redunda en una relación de causa y efecto que podría ser bidireccional en la relación de la deformidad facial y el cóndilo mandibular.…”

Mandibular condyle dimensions in Peruvian patients with Class II and Class III skeletal patterns.

“…Condylar dimensions and position in the fossa are more frequently affected in older compared to younger patients. 5 Consequently, the sample was selected according to this criterion, in order to evaluate patients without condylar alterations.…”

“…Initial sample estimate was 58 CBCTs (power 80%, α of 0.05, sample size ratio of 1.70). Finally, a total of 124 CBCTs from 18-30 yearold patients were selected, 5 and classified into two groups (n=62) for Class II and Class III skeletal patterns. CBCTs from patients with bilateral molar occlusal contacts were included in the study.…”