Comparison of dynamic occlusal contacts during chewing between working and balancing sides
| Autor: | Tomoya Murakami, Yuki Nakamura, Kazunari Matsueda, Mie Kurosawa, Yukiko Nogami, Emi Inada, Shinji Shibasaki, Yoko Iwase, Tomonori Iwasaki, Youichi Yamasaki, Nozomi Murakami, Haruaki Hayasaki, Issei Saitoh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Molar
Orthodontics business.industry balancing side Jaw movement Oral health working side eye diseases Masticatory force stomatognathic diseases medicine.anatomical_structure stomatognathic system dynamic occlusal contact area Occlusion Premolar medicine Posterior teeth business Mastication gum-chewing multilevel linear model |
| Zdroj: | Dental, Oral and Craniofacial Research. 4(2) |
| ISSN: | 2058-5314 |
| Popis: | Objectives: Mastication is a crucial function for the elderly, and promotes oral health status, cognitive function and the physical constitution. Most reports about occlusion patterns and occlusal glide of adults have reported the jaw movement at the lower incisal point due to easiness of evaluating masticatory performance. The purpose of this study was to test the hypothesis that dynamic occlusal contact area (OCA) during chewing differ for each tooth on the working vs. the balancing chewing side. Design: In thirteen healthy Japanese females, OCA was estimated with a measurement system combining 3-D tracking of mandibular movements with 3-D digitization of tooth shape. Results: The starting of occlusal contact between teeth at working side and balancing side did not differ significantly. In contrast, ending of occlusal contact of teeth at balancing side were markedly longer than that of teeth at working side at lateral incisor, canine, and first premolar. The dynamic sum of OCAs for all teeth was symmetrical around maximum closed position (MCP) when chewing on the working side. In contrast, the dynamic sum of OCA peaked after MCP when chewing on the balancing side. In working and balancing side, sums of maximum OCA at all posterior teeth accounted for 93%, 86% of sum OCA for all teeth at working and balancing sides, respectively. Conclusion: Our result suggested that the hypothesis that dynamic OCA during chewing differ for each tooth on the working vs. the balancing chewing side was not accepted at molars. |
| Databáze: | OpenAIRE |
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