Development of the mandibular curve of spee and maxillary compensating curve: A finite element model

English version

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
prolekare.web.journal.doi_sk: 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:

Teeth – Musculoskeletal system – Dentition – Eating – Paleobiology – Finite element analysis – Tooth eruption – Hominin evolution

Zdroje

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Development of the mandibular curve of spee and maxillary compensating curve: A finite element model

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