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Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
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Published on: March 12, 2021

Metaversion can reliably predict humeral head version: a computed tomography-based validation study.

George S Athwal1, Joy C MacDermid, Danny P Goel

  • 1Division of Orthopedic Surgery, University of Western Ontario, Hand and Upper Limb Centre, London, Ontario, Canada. gathwal@uwo.ca

Journal of Shoulder and Elbow Surgery
|August 14, 2010
PubMed
Summary
This summary is machine-generated.

Metaphyseal version (metaversion) accurately predicts humeral head version, offering a reliable intraoperative landmark for complex fractures. This finding aids surgeons in determining correct humeral head positioning.

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Published on: February 10, 2015

Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Anatomy

Background:

  • Determining anatomic humeral head version can be challenging, especially during surgery for irreparable proximal humeral fractures.
  • Existing intraoperative landmarks for humeral head version are limited in reliability.

Purpose of the Study:

  • To test the hypothesis that metaphyseal version (metaversion) can serve as a reliable landmark for determining anatomic humeral head version.
  • To evaluate the accuracy of metaversion as a predictor of humeral head version using computed tomography (CT).

Main Methods:

  • CT scans of 50 patients without prior shoulder issues were analyzed.
  • Metaphyseal version and humeral head version were measured independently by two blinded surgeons.
  • Interobserver and intraobserver reliability was assessed using intraclass correlation.

Main Results:

  • The mean difference between metaversion and humeral head version was 2.5°.
  • Reliability analyses showed excellent interrater (0.97) and intrarater (0.98) agreement.
  • Small, non-significant differences were observed across sexes and shoulder laterality.

Conclusions:

  • Proximal humeral metaphyseal version (metaversion) is a dependable predictor of the ipsilateral humeral head version.
  • Metaversion can be utilized as a valuable intraoperative landmark for achieving correct humeral head alignment.