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Updated: Oct 8, 2026

An Instrumented Pull Test to Characterize Postural Responses
Published on: April 5, 2019
Measurement of lateral loads exerted on the maxillofacial region by habitual postures
Masako Suzaki1, Miwako Naruse, Nobuko Watanabe
1Suzaki Dental Clinic, 4-17-11 Nishifuna, Funabashi, Chiba 273-0031, Japan.
Abstract:
Lateral loads exerted on the maxillofacial region by habitual postures and habits may cause lateral shift or deformity of the mandible. These loads were measured with a desktop dynamic-strain gauge (DPM-600, Kyowa Co.) connected to a small, highly sensitive pressure sensor (PSL-A type, Kyowa Co.), and recorded with an oscillographic recorder (RDM-100A, Kyowa Co.). Measurements were taken with a pressure sensor embedded in silicone impression material placed in a vinyl chloride resin bag, on which pressures were applied. A preliminary study was conducted to obtain a proportional constant and a conversion formula for load calculation. The subsequent main study included 20 healthy male volunteers for load measurement in 12 positions. The mean load exerted on the mandible was 43.7 N when the subjects lay face down and approximately 20 N when they sat resting the lateral part of the chin on the hand, indicating that these loads are greater than regular orthodontic forces.
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