TY - JOUR
T1 - Measurement of mechanical strain on mandibular surface with mastication robot
T2 - Influence of muscle loading direction and magnitude
AU - Usui, T.
AU - Maki, K.
AU - Toki, Y.
AU - Shibasaki, Y.
AU - Takanobu, H.
AU - Takanishi, A.
AU - Hatcher, D.
AU - Miller, A.
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
KW - Bone density
KW - Mastication robot
KW - Mechanical strain
KW - Strain gauge
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U2 - 10.1034/j.1600-0544.2003.250.x
DO - 10.1034/j.1600-0544.2003.250.x
M3 - Article
C2 - 2003170680
AN - SCOPUS:0642365198
SN - 1601-6335
VL - 6
SP - 163
EP - 167
JO - Orthodontics and Craniofacial Research
JF - Orthodontics and Craniofacial Research
IS - SUPPL1
ER -