Biomechanical investigation of flexor digitorum tendons in trigger finger patients using sonography

Chou, Yi-Chuan and Lee, Su-Ya and Tsai, Yuh-Ping and Kuo, Li-Chieh and Lu, Szu-Ching and Chieh, Hsiao-Feng and Lin, Chien-Ru and Sun, Yung-Nien and Jou, I-Ming and Su, Fong-Chin and Yang, Tai-Hua (2018) Biomechanical investigation of flexor digitorum tendons in trigger finger patients using sonography. In: 8th World Congress of Biomechanics, 2018-07-08 - 2018-07-12, Convention Centre Dublin.

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    Abstract

    Trigger finger (TF) has generally been ascribed to primary changes in the first annular (A1) pulley. Repeated friction between the A1 pulley and flexor digitorum tendons could result in swelling of soft tissues, and thus it has been speculated that TF affects tendons’ biomechanical behaviors. However, the pathology mechanism related to these behaviors remains unclear. The purposes of this study are to understand (1) the variations in the morphologies of the flexor digitorum profundus (FDP) and flexor digitorum superficialis (FDS) between normal fingers and TFs, (2) the differences in the biomechanical behaviors of the FDP and FDS between normal fingers and TFs in various finger flexion positions, and (3) the effect of various finger positions on the biomechanical behaviors of the FDP and FDS.