Measurement of mechanical strain on mandibular surface with mastication robot: Influence of muscle loading direction and magnitude

T. Usui, K. Maki, Y. Toki, Y. Shibasaki, H. Takanobu, Atsuo Takanishi, D. Hatcher, A. Miller

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Objectives: To investigate the mechanical effects of mastication on the mandible, we developed computational controlled mastication robot system with human dry skull and analyzed the strain distribution on the mandibular bone surface. Design: In the mastication robot, the mandible was suspended by eight wires, which simulated masticatory muscles. A non-linear spring damper generated viscoelastic properties, and tension sensors for simulation of jaw reflection to avoid unusual biting force were applied as a biological feedback mechanism. By using this robot system, various patterns of muscle loading (change of wire direction and magnitude) were performed. Results: From the results, significant differences in the amount of principal strain and its distribution were demonstrated in each condition (ANOVA, post hoc test, and p < 0.05). The value of maximum principal strain ranged from 79.66 . 10-6 [at anterior border of ramus (Buccal side), 128 N] to )1.42 . 10-6 [at foramen mentale (Buccal side), 32 N]. Conclusion - These results suggested that the muscle loading generated the mechanical strain on the mandibular bone surface and it was affected by the changes in loading direction and magnitude.

    Original languageEnglish
    Pages (from-to)163-167
    Number of pages5
    JournalOrthodontics and Craniofacial Research
    Volume6
    Issue numberSUPPL1
    DOIs
    Publication statusPublished - 2003

    Fingerprint

    Mastication
    Cheek
    Mandible
    Muscles
    Masticatory Muscles
    Bone and Bones
    Jaw
    Skull
    Analysis of Variance
    Direction compound

    Keywords

    • Bone density
    • Mastication robot
    • Mechanical strain
    • Strain gauge

    ASJC Scopus subject areas

    • Orthodontics
    • Oral Surgery
    • Otorhinolaryngology
    • Surgery

    Cite this

    Measurement of mechanical strain on mandibular surface with mastication robot : Influence of muscle loading direction and magnitude. / Usui, T.; Maki, K.; Toki, Y.; Shibasaki, Y.; Takanobu, H.; Takanishi, Atsuo; Hatcher, D.; Miller, A.

    In: Orthodontics and Craniofacial Research, Vol. 6, No. SUPPL1, 2003, p. 163-167.

    Research output: Contribution to journalArticle

    Usui, T. ; Maki, K. ; Toki, Y. ; Shibasaki, Y. ; Takanobu, H. ; Takanishi, Atsuo ; Hatcher, D. ; Miller, A. / Measurement of mechanical strain on mandibular surface with mastication robot : Influence of muscle loading direction and magnitude. In: Orthodontics and Craniofacial Research. 2003 ; Vol. 6, No. SUPPL1. pp. 163-167.
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    AU - Takanishi, Atsuo

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