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Weaver JS, Omar IM, Chadwick NS, Shechtel JL, Elifritz JM, Shultz CL, Taljanovic MS. Update on Shoulder Arthroplasties with Emphasis on Imaging. J Clin Med 2023; 12:jcm12082946. [PMID: 37109282 PMCID: PMC10143235 DOI: 10.3390/jcm12082946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 04/03/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Shoulder pain and dysfunction may significantly impact quality of life. If conservative measures fail, advanced disease is frequently treated with shoulder arthroplasty, which is currently the third most common joint replacement surgery following the hip and knee. The main indications for shoulder arthroplasty include primary osteoarthritis, post-traumatic arthritis, inflammatory arthritis, osteonecrosis, proximal humeral fracture sequelae, severely dislocated proximal humeral fractures, and advanced rotator cuff disease. Several types of anatomic arthroplasties are available, such as humeral head resurfacing and hemiarthroplasties, as well as total anatomic arthroplasties. Reverse total shoulder arthroplasties, which reverse the normal ball-and-socket geometry of the shoulder, are also available. Each of these arthroplasty types has specific indications and unique complications in addition to general hardware-related or surgery-related complications. Imaging-including radiography, ultrasonography, computed tomography, magnetic resonance imaging, and, occasionally, nuclear medicine imaging-has a key role in the initial pre-operative evaluation for shoulder arthroplasty, as well as in post-surgical follow-up. This review paper aims to discuss important pre-operative imaging considerations, including rotator cuff evaluation, glenoid morphology, and glenoid version, as well as to review post-operative imaging of the various types of shoulder arthroplasties, to include normal post-operative appearances as well as imaging findings of complications.
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Affiliation(s)
- Jennifer S Weaver
- Department of Radiology and Radiologic Sciences, Vanderbilt University Medical Center, 1161 21st Ave. S, MCN CCC-1118, Nashville, TN 37232, USA
| | - Imran M Omar
- Department of Radiology, Northwestern Memorial Hospital, 676 N. Saint Clair Street, Suite 800, Chicago, IL 60611, USA
| | - Nicholson S Chadwick
- Department of Radiology and Radiologic Sciences, Vanderbilt University Medical Center, 1161 21st Ave. S, MCN CCC-1118, Nashville, TN 37232, USA
| | - Joanna L Shechtel
- Department of Radiology and Radiologic Sciences, Vanderbilt University Medical Center, 1161 21st Ave. S, MCN CCC-1118, Nashville, TN 37232, USA
| | - Jamie M Elifritz
- Department of Radiology, MSC08 4720, 1 University of New Mexico, Albuquerque, NM 87131, USA
- Department of Pathology, University of New Mexico, New Mexico Office of the Medical Investigator, MSC08 4720, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Christopher L Shultz
- Department of Orthopaedics and Rehabilitation, University of New Mexico, MSC 10 5600, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Mihra S Taljanovic
- Department of Radiology, MSC08 4720, 1 University of New Mexico, Albuquerque, NM 87131, USA
- Department of Medical Imaging, University of Arizona, 1501 N. Campbell, Tucson, AZ 85724, USA
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Variability and reliability of 2-dimensional vs. 3-dimensional glenoid version measurements with 3-dimensional preoperative planning software. J Shoulder Elbow Surg 2022; 31:302-309. [PMID: 34411724 DOI: 10.1016/j.jse.2021.07.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/07/2021] [Accepted: 07/11/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Preoperative planning for total shoulder arthroplasty (TSA) may change according to the measured degree of glenoid version. Both 2-dimensional (2D) and 3-dimensional (3D) computed tomographic (CT) scans are used to measure glenoid version, with no consensus on which method is more accurate. However, it is generally accepted that 3D measurements are more reliable, yet most 3D reconstruction software currently in clinical use have never been directly compared to 2D. The purpose of this study is to directly compare 2D and 3D glenoid version measurements and determine the differences between the two. METHODS CT scans were performed preoperatively on 315 shoulders undergoing either anatomic or reverse TSA. 2D measurements of glenoid version were obtained manually using the Friedman method, whereas 3D measurements were obtained using the Equinoxe Planning Application (Exactech Inc.) 3D-reconstruction software. Negative version values indicate retroversion, whereas positive values indicate anteversion. Two observers collected the 2D measurements 2 separate times, and intra- and interobserver measurements were calculated. Groups were compared for variability using intraclass correlation coefficients (ICCs), and for differences in sample means using Student t tests. Additionally, samples were stratified by version value in order to better understand the potential sources of error between measurement techniques. RESULTS For the 2D measurements, intraobserver variability indicated excellent reproducibility for both observer 1 (ICC = 0.928, 95% confidence interval [CI] 0.911-0.942) and observer 2 (ICC = 0.964, 95% CI 0.955-0.971). Interobserver variability measurements also indicated excellent reproducibility (ICC = 0.915, 95% CI 0.778-0.956). The overall 2D version measurement average (-4.9° ± 10.3°) was significantly less retroverted than the 3D measurement average (-8.4° ± 9.1°) (P < .001), with 3D measurements yielding a more retroverted value 73% of the time. When stratified on the basis of version value with outliers excluded, there was no significant difference in the distribution of high-error samples within the data. DISCUSSION There was excellent reproducibility between the 2 observers in terms of both intra- and interobserver variability. The 3D measurement techniques were significantly more likely to return a more retroverted measurement, and high-error samples were evenly distributed throughout the data, indicating that there were no discernable trends in the degree of error observed. Shoulder surgeons should be aware that different glenoid version measurement strategies can yield different version measurements, as these can affect preoperative planning and surgeon decision making.
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