UMMS Affiliation

Department of Orthopedics and Physical Rehabilitation

Publication Date


Document Type



Anatomy | Orthopedics | Radiology | Surgical Procedures, Operative


Successful total shoulder arthroplasty is, in part, dependent on anatomic reconstruction of the glenohumeral joint. The purpose of this study was to evaluate the post-operative anatomy of total shoulder arthroplasty with an anatomic implant design in patients with primary glenohumeral osteoarthritis and compare it to published normative anatomic measurements. Fifty-one patients (56 shoulders) with primary glenohumeral osteoarthritis were treated with a press-fit humeral component as part of a total shoulder arthroplasty (Aequalis, Tornier, Edina, Minnesota). Analysis of postoperative true anterior posterior radiographs was performed with use of a custom software algorithm. The mean humeral inclination (head-shaft angle), mean humeral implant anatomical humeral axis, mean greater tuberosity height, and mean humeral head center offset (medial offset) were 135.4±5.1°, 1.73±1.7°, 6.9±2.4 mm, and 3.8±1.8 mm, respectively. All parameters were within the ranges reported in the literature for normal shoulders except the mean humeral head center offset, which was less than reported in the literature. Anatomic parameters of a total shoulder arthroplasty can be achieved with an anatomically designed, modular adaptable press-fit design. Reduced medial humeral head center offset was likely dependent upon implant specific design parameters.


Anatomic reconstruction, Glenohumeral arthritis, Humeral head replacement, Press-fit stem, Shoulder arthroplasty

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©Copyright B. Vopat et al., 2017. Licensee PAGEPress, Italy. This work is licensed under a Creative Commons Attribution NonCommercial 4.0 License (CC BY-NC 4.0).

DOI of Published Version



Orthop Rev (Pavia). 2017 Oct 10;9(3):7168. doi: 10.4081/or.2017.7168. eCollection 2017 Sep 30. Link to article on publisher's site

Journal/Book/Conference Title

Orthopedic reviews

Related Resources

Link to Article in PubMed

PubMed ID


Creative Commons License

Creative Commons Attribution-Noncommercial 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License