Development of the mandibular curve of spee and maxillary compensating curve: A finite element model
Autoři:
Steven D. Marshall aff001; Karen Kruger aff002; Robert G. Franciscus aff003; Thomas E. Southard aff001
Působiště autorů:
Department of Orthodontics, College of Dentistry and Dental Clinics, The University of Iowa, Iowa City, Iowa, United States of America
aff001; Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin, United States of America
aff002; Department of Anthropology, The University of Iowa, Iowa City, Iowa, United States of America
aff003
Vyšlo v časopise:
PLoS ONE 14(12)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0221137
Souhrn
The curved planes of the human dentition seen in the sagittal view, the mandibular curve of Spee and the maxillary compensating curve, have clinical importance to modern dentistry and potential relevance to the craniofacial evolution of hominins. However, the mechanism providing the formation of these curved planes is poorly understood. To explore this further, we use a simplified finite element model, consisting of maxillary and mandibular “blocks”, developed to simulate tooth eruption, and forces opposing eruption, during simplified masticatory function. We test our hypothesis that curved occlusal planes develop from interplay between tooth eruption, occlusal load, and mandibular movement. Our results indicate that our simulation of rhythmic chewing movement, tooth eruption, and tooth eruption inhibition, applied concurrently, results in a transformation of the contacting maxillary and mandibular block surfaces from flat to curved. The depth of the curvature appears to be dependent on the radius length of the rotating (chewing) movement of the mandibular block. Our results suggest mandibular function and maxillo-mandibular spatial relationship may contribute to the development of human occlusal curvature.
Klíčová slova:
Dentition – Eating – Finite element analysis – Musculoskeletal system – Paleobiology – Teeth – Tooth eruption – Hominin evolution
Zdroje
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PLOS One
2019 Číslo 12
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