Relationship among Types of Growth Patterns, Buccolingual Molar Inclination and Cortical Bone Thickness of the Mandible: A CT Scan Study

Abstract

Objective: The purpose of this study was to evaluate the relationship between different types of growth patterns, the buccolingual molar inclination and cortical bone thickness of the mandible. Materials and methods: The material consisted of total 30 cases within the age range of 18 to 25 years. They all demonstrated normal occlusion with a minimal dental discrepancy without any cross bite or facial asymmetry. The selected subjects were differentiated clinically into horizontal growth pattern, normal growth pattern and vertical growth pattern based on the parameters like clinical FMA and antegonial notch. Results: The cortical bone thickness of the first permanent mandibular molar (M1) and second permanent mandibular molar (M2) sections was thicker in short-faced subjects than in average and long-faced subjects. The buccolingual inclination of the first permanent mandibular molar (M1) and second permanent mandibular molar (M2) sections in the short-faced subjects was significantly smaller than the same dimension in the average and long-faced subjects. Conclusion: The results of this study provide evidence that a significant, but complex relationship exists between structures of the mandibular body and types of growth pattern. The morphological features that relate to masticatory function and types of growth pattern are associated with the cortical bone thickness of the mandibular body and the buccolingual inclination of the first and second permanent mandibular molars.

Correlation of radiomorphometric indices of the mandible and mandibular angle fractures

“…Moreover, the muscle morphology in HGA individuals results in relatively lower masticatory force or function, which leads to a reduction in cortical bone thickness at the angle of mandible. Thus, mandibular cortical bone width in HGA patients is thinner than that in LGA patients; this is also true for the alveolar bone thickness [ 36 , 40 , 41 , 42 ]. Thus, it may be stated that the high frequency of HGA patients with MAF is due to the different morphology of their muscles of mastication (smaller cross-sectional area) and thinner cortical bone at the angle of mandible compared with other individuals.…”

“…Moreover, the muscle morphology in HGA individuals results in relatively lower masticatory force or function, which leads to a reduction in cortical bone thickness at the angle of mandible. Thus, mandibular cortical bone width in HGA patients is thinner than that in LGA patients; this is also true for the alveolar bone thickness [35,[40][41][42].…”

Magnitude of gonial angle influence on the commonness of mandibular angle fractures

“…Thus, the mandibular cortical bone width is thinner in high-angle cases than low-angle cases. [ 15 16 17 ] This feature is also reflected in the thickness of the associated alveolar bone. [ 18 ] Further, it has been established that the height of the mandible at the ramus and angle region in high angle cases is significantly decreased, as compared to normal individuals.…”

Morfología Ósea de Sínfisis Mandibular: Estudio Piloto

“…Baysal et al (2013) indicaron diferencias significativas entre sujetos clase I y clase II dentaria al comparar el tamaño sagital de la cortical ósea en tomografía computarizada; ellos confirmaron que los sujetos clase II presentan menor tamaño óseo de la cortical anterior en áreas próximas al diente. También, Sharma et al (2012), indicaron que el tamaño de la cortical ósea bucal seria asociada al modelo de crecimiento craneofacial, estableciendo relaciones entre el tipo de deformidad facial y las características del hueso cortical. Tabla III.…”