| J Anat. 2001 September; 199(Pt 3): 323–328. doi: 10.1046/j.1469-7580.2001.19930323.x. | PMCID: PMC1468334 |
Copyright © 2001 Anatomical Society of Great Britain and Ireland Evaluation of three-dimensional glenoid structure using MRI HIROAKI INUI, 1
KAZUOMI SUGAMOTO, 1
TAKASHI MIYAMOTO, 1
AKITOSHI MACHIDA, 2
JUN HASHIMOTO, 2
and KATSUYA NOBUHARA 2
1
Department of Orthopaedic Surgery, Osaka University Medical School, Osaka
2
Nobuhara Hospital and Institute of Biomechanics, Hyogo, Japan
Abstract The tilting angle and the shape of the glenoid cavity are considered to relate closely to shoulder stability. They are also important when planning arthroplasty and developing new designs. This study examines the glenoid cavity using 3-dimensional MRI. Forty volunteers (20 men, 20 women; average age 21.4; range 18–35 y) were enrolled in the study. The tilting angles of the glenoid bone were measured in 5 consecutive axial planes perpendicular to the glenoidal long axis. Cross sections were divided into 3 types (concave, flat, convex) according to the shape on each plane. The average tilting angles for the 5 planes from the bottom to the top were 3.3±4.1, 1.4±3.8, −0.6±1.9, −1.4±3.3, and −6.2±3.3 degrees anteriorly, indicating that the 3-dimensional bony structure of the glenoid was twisted anteriorly to posteriorly. Images on the bottom plane consisted of 82.5% concave type, 15% flat type and 2.5% convex type, while only 3 cases (7.5%) showed concave at the top plane. The shape of the glenoid cavity is thought to be conducive to glenohumeral motion and stability. Full Text The Full Text of this article is available as a PDF (276K). These references are in PubMed. This may not be the complete list of references from this article. - Amstutz, HC; Sew Hoy, AL; Clarke, IC. UCLA anatomic total shoulder arthroplasty. Clin Orthop Relat Res. 1981 (155):7–20.Mar–Apr; [PubMed]
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