The biomechanical effect of the distal interosseous membrane on distal radioulnar joint stability: A preliminary anatomic study

Takashi Kitamura, Hisao Moritomo, Sayuri Arimitsu, Lawrence J. Berglund, Kristin D. Zhao, Kai Nan An, Marco Rizzo

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Purpose: The distal interosseous membrane (DIOM) is a secondary stabilizer of the distal radioulnar joint (DRUJ) and has a considerably variable morphology. The purpose of this study was to investigate whether innate DRUJ stability is influenced by the anatomic variation of the DIOM. Methods: Ten fresh-frozen cadaver upper extremities were used in this study. The humerus and the ulna were affixed rigidly to a custom-made apparatus, with the elbow in 90° of flexion. Testing was performed by translating the radius in volar and dorsal directions relative to the ulna, with a 20-N applied force in neutral forearm alignment, 60° pronation, and 60° supination. Total translation of the radius was measured as DRUJ laxity. After the experiment, we investigated anatomic variation of the DIOM, especially regarding the existence of the distal oblique bundle (DOB), which is a notably thick fiber within the DIOM. We compared the DRUJ stability between the groups with and without the DOB. Results: The DOB was found in 4 of 10 specimens. The group with a DOB demonstrated a significantly greater DRUJ stability in the neutral position than the group without a DOB. In pronated and supinated forearm positions, no significant difference in DRUJ stability was obtained between the groups with and without a DOB. Conclusions: Innate DRUJ stability in the neutral forearm position was greater in the group with a DOB than in those without a DOB. Clinical relevance: This study suggests that considerable variation exists in DRUJ laxity and that it partially depends on anatomical variations of the DIOM.

Original languageEnglish (US)
Pages (from-to)1626-1630
Number of pages5
JournalJournal of Hand Surgery
Volume36
Issue number10
DOIs
StatePublished - Oct 1 2011

Keywords

  • Distal interosseous membrane
  • radioulnar joint

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Fingerprint Dive into the research topics of 'The biomechanical effect of the distal interosseous membrane on distal radioulnar joint stability: A preliminary anatomic study'. Together they form a unique fingerprint.

  • Cite this