Biomechanical aspects of trigger finger - which changed first, the pulley or the tendon?

Szu Ching Lu, Fong-chin Su, Chunfeng Zhao, Andrew R. Thoreson, I. Ming Jou, Kai Nan An

Research output: Contribution to journalReview article

Abstract

Although trigger finger is a relatively common hand disorder, its exact cause remains unknown. Whether the etiology of the abnormality resides in the tendon or in the pulley continues debate. The purpose of this review is to summarize what is known about the clinical and biomechanical presentation of trigger finger. While the A1 pulleys are more accessible for examination than the flexor tendons during surgery and have been more extensively studied, it should not yet be assumed that the tendons are any less responsible for the entrapment symptom. Previous assessments of these tissues include testing of their compliance, friction coefficient, and contact angle. Kinematic and kinetic performance of trigger fingers has been evaluated in vivo. Thickening and changes in gene expression have also been identified in trigger finger tendons. Further investigation into the role of flexor tendons in trigger finger should be performed to facilitate the understanding of the etiology and mechanism of trigger finger development. Future studies could incorporate non-invasive medical imaging in order to understand the appearance and material properties of the involved pulley and tendons, and to combine these characteristics with finger kinematics. Furthermore, understanding the mechanism of biologic adaptations of the A1 pulley and the flexor tendons in response to the mechanical loading might be helpful in providing clues and evidence for effective, novel treatment for trigger finger.

Original languageEnglish
JournalJournal of Biomechanical Science and Engineering
Volume9
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Pulleys
Tendons
Kinematics
Medical imaging
Gene expression
Surgery
Contact angle
Materials properties
Tissue
Friction
Kinetics
Testing

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

Cite this

Lu, Szu Ching ; Su, Fong-chin ; Zhao, Chunfeng ; Thoreson, Andrew R. ; Jou, I. Ming ; An, Kai Nan. / Biomechanical aspects of trigger finger - which changed first, the pulley or the tendon?. In: Journal of Biomechanical Science and Engineering. 2014 ; Vol. 9, No. 2.
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Biomechanical aspects of trigger finger - which changed first, the pulley or the tendon? / Lu, Szu Ching; Su, Fong-chin; Zhao, Chunfeng; Thoreson, Andrew R.; Jou, I. Ming; An, Kai Nan.

In: Journal of Biomechanical Science and Engineering, Vol. 9, No. 2, 01.01.2014.

Research output: Contribution to journalReview article

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