Spatial mapping of humeral head bone density

Journal of Shoulder and Elbow Surgery
Hamidreza AlidoustiJonathan Jeffers

Abstract

Short-stem humeral replacements achieve fixation by anchoring to the metaphyseal trabecular bone. Fixing the implant in high-density bone can provide strong fixation and reduce the risk of loosening. However, there is a lack of data mapping the bone density distribution in the proximal humerus. The aim of the study was to investigate the bone density in proximal humerus. Eight computed tomography scans of healthy cadaveric humeri were used to map bone density distribution in the humeral head. The proximal humeral head was divided into 12 slices parallel to the humeral anatomic neck. Each slice was then divided into 4 concentric circles. The slices below the anatomic neck, where short-stem implants have their fixation features, were further divided into radial sectors. The average bone density for each of these regions was calculated, and regions of interest were compared using a repeated-measures analysis of variance with significance set at P < .05. Average apparent bone density was found to decrease from proximal to distal regions, with the majority of higher bone density proximal to the anatomic neck of the humerus (P < .05). Below the anatomic neck, bone density increases from central to peripheral regions, where cortical b...Continue Reading

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Citations

Jul 1, 2020·Journal of Biomechanical Engineering·Pendar SoltanmohammadiRyan Willing
Jul 28, 2020·Arthroscopy Techniques·Paul J CagleBradford O Parsons
Aug 2, 2019·Journal of the Mechanical Behavior of Biomedical Materials·Giulia MolinoChiara Vitale-Brovarone
Jan 25, 2021·Journal of Shoulder and Elbow Surgery·Steven S GoldbergWilliam N Levine

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