Ontogenetic changes in the funcional matrices and facial bone remodeling

BRACHETTA-APORTA, NATALIA; BERNAL VALERIA; GONZALEZ PAULA N

Revista Argentina de Antropologia Biologica

Asociación Argentina de Antropología Biológica

Año: 2023

1514-7991

According to the functional matrix hypothesis, changes in size and shape and localization of 28 facial bones during individual ontogeny are influenced by periosteal and capsular matrices. 29 However, the interaction of the functional matrices with the distribution of areas of bone 30 remodeling has not been extensively studied yet. Here we evaluate the changes in the volume of 31 the paranasal sinuses and orbital capsule with age and their association with facial growth 32 arising from bone remodeling patterns of the upper and midface in a sample of prehistoric 33 human populations from South America. We found an association between capsule size and 2 34 bone cell proportions, however the trajectories of variation are ambiguous across bones. The 35 frontal and maxillary sinuses had a significant increase from 4.5 up to 14.5 years old, while the 36 orbital capsule had an increase in volume even in adult stages. In turn, the volume of the frontal 37 sinus increases while the bone formation remains relatively stable in subadults and decreases in 38 adults, while the maxilla and the zygomatic bones display a lower proportion of formation when 39 the bones are growing. Our study contributes with information concerning the covariation 40 between bone growth remodeling and the increments of the capsular matrices