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Aier S, Reddy B, Pandey V. Does glenoid version affect the post-operative clinical outcome after repair of posterior labral tear: A retrospective study. J Orthop 2024; 49:134-139. [PMID: 38223426 PMCID: PMC10784136 DOI: 10.1016/j.jor.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 12/17/2023] [Indexed: 01/16/2024] Open
Abstract
Introduction Posterior shoulder instability and consequent labral tear have been predominantly associated with retroversion of the bony glenoid and chondrolabral version. However, literature concerning the degree of glenoid and chondrolabral version and clinical outcomes following labral repair is scarce. Methods A retrospective cohort study was undertaken among patients with posterior shoulder instability who had undergone arthroscopic isolated posterior labral repair. The MRI was used to assess the bony and labral variations of the glenoid using the Friedman method and further categorized as either anteverted or retroverted glenoid. American Shoulder and Elbow Surgeons (ASES), Oxford Shoulder Score (OSS), and Single Assessment Numeric Evaluation (SANE) scores were used to evaluate pre- and postoperative clinical outcomes at a minimum follow-up of one year. Results 33 shoulder MRIs performed at our institution were available for radiographic analysis. Among the 33 shoulders that underwent posterior shoulder capsulolabral repair, 23 were available for clinical follow-up for at least one year (range, 12-108 months). The mean (±SD) labral version and bony version were -3.98 (±5.68) and -2.83 (±5.20), respectively. The mean (±SD) postoperative ASES, Oxford score, and SANE scores for all participants were 84.04 (±14.14), 43.38 (±3.81), and 78.57 (±17.40), respectively. However, the difference in clinical outcomes in patients with anteverted or retroverted glenoid versions was not statistically significant. Conclusion Our study concludes a strong correlation between posterior glenohumeral instability and higher degree of glenoid retroversion. Nevertheless, variations in the glenoid version appear to have no significant impact on clinical outcomes. Level of study Level IV, retrospective cohort.
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Affiliation(s)
- Sashitemjen Aier
- Department of Orthopaedics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, 576104, India
| | - Bishak Reddy
- Department of Orthopaedics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, 576104, India
| | - Vivek Pandey
- Department of Orthopaedics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Udupi, Karnataka, 576104, India
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Shields DW, A’Court J, Rashid MS, Monga P. Clinical outcome of wedged glenoid reconstruction in anatomic total shoulder arthroplasty for osteoarthritic retroverted glenoid: a minimum 2-year follow-up. JSES Int 2024; 8:343-348. [PMID: 38464446 PMCID: PMC10920140 DOI: 10.1016/j.jseint.2023.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024] Open
Abstract
Background Glenoid retroversion and humeral head subluxation is a progressive disorder due to abnormal force coupling and increased contact force. In situ placement of anatomic total shoulder arthroplasty (TSA) components in this scenario results in edge loading, progressive subluxation, and early failure. Wedged glenoid components have been demonstrated to improve glenohumeral alignment, but have not been correlated with mid-term clinical outcomes. Methods Patients undergoing TSA using a wedged all-polyethylene glenoid component for retroverted glenoid deformity were identified from a prospectively maintained database. Preoperative planning computed tomography was routinely performed and compared to postoperative correction on radiographic evaluation. Evidence of loosening was correlated to prospectively collect clinical outcome using patient-reported outcome measures. A matched group of neutrally aligned glenohumeral joints undergoing anatomic TSA was used to compare improvement in clinical outcomes. Results Over a 5-year period, 17 patients with mean age 60 (range 43-81, standard deviation 10.5) were identified with a mean preoperative neoglenoid retroversion of 16.7° (standard deviation 4.5). At a mean follow-up of 43.8 months (range 27-60), no revision surgeries were undertaken. Improvement in the Oxford Shoulder Score was 18 points (P < .0001). The mean improvement was compared to a matched control group demonstrating a comparable magnitude of improvement of 20.4 points. Conclusion Wedged polyethylene components for Walch B2-type glenoids in TSA yield acceptable correction of the joint line, excellent clinical outcomes, and survivorship is maintained in the short term. The clinical and radiological outcome demonstrated similar improvement to that seen in A type deformities.
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Affiliation(s)
| | - Jamie A’Court
- Wrightington Upper Limb Unit, Wrightington Hospital, Wigan, Lancashire, UK
| | - Mustafa S. Rashid
- University of Calgary, Alberta Health Services, Calgary, Alberta, Canada
| | - Puneet Monga
- Wrightington Upper Limb Unit, Wrightington Hospital, Wigan, Lancashire, UK
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Kopriva JM, McKissack HM, Griswold BG, Hussain ZB, Cooke HL, Gottschalk MB, Wagner ER. Mixed-reality improves execution of templated glenoid component positioning in shoulder arthroplasty: a CT imaging analysis. J Shoulder Elbow Surg 2024:S1058-2746(24)00086-7. [PMID: 38320671 DOI: 10.1016/j.jse.2023.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/06/2023] [Accepted: 12/17/2023] [Indexed: 02/08/2024]
Abstract
INTRODUCTION Glenoid placement is critical for successful outcomes in total shoulder arthroplasty (TSA). Preoperative templating with three-dimensional imaging has improved implant positioning, but deviations from the planned inclination and version still occur. Mixed-Reality (MR) is a novel technology that allows surgeons intra-operative access to three-dimensional imaging and templates, capable of overlaying the surgical field to help guide component positioning. The purpose of this study was to compare the execution of preoperative templates using MR vs.standard instruments (SIs). METHODS Retrospective review of 97 total shoulder arthroplasties (18 anatomic, 79 reverse) from a single high-volume shoulder surgeon between January 2021 and February 2023, including only primary diagnoses of osteoarthritis, rotator cuff arthropathy, or a massive irreparable rotator cuff tear. To be included, patients needed a templated preoperative plan and then a postoperative computed tomography scan. Allocation to MR vs. SI was based on availability of the MR headset, industry technical personnel, and the templated preoperative plan loaded into the software, but preoperative or intraoperative patient factors did not contribute to the allocation decision. Postoperative inclination and version were measured by two independent, blinded physicians and compared to the preoperative template. From these measurements, we calculated the mean difference, standard deviation (SD), and variance to compare MR and SI. RESULTS Comparing 25 MR to 72 SI cases, MR significantly improved both inclination (P < .001) and version (P < .001). Specifically, MR improved the mean difference from preoperative templates (by 1.9° inclination, 2.4° version), narrowed the SD (by 1.7° inclination, 1.8° version), and decreased the variance (11.7-3.0 inclination, 14.9-4.3 version). A scatterplot of the data demonstrates a concentration of MR cases within 5° of plan relative to SI cases typically within 10° of plan. There was no difference in operative time. CONCLUSION MR improved the accuracy and precision of glenoid positioning. Although it is unlikely that 2° makes a detectable clinical difference, our results demonstrate the potential ability for technology like MR to narrow the bell curve and decrease the outliers in glenoid placement. This will be particularly relevant as MR and other similar technologies continue to evolve into more effective methods in guiding surgical execution.
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Affiliation(s)
- John M Kopriva
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - Haley M McKissack
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - B Gage Griswold
- Department of Orthopaedic Surgery, Denver Shoulder at Western Orthopaedics, Denver, CO, USA
| | - Zaamin B Hussain
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - Hayden L Cooke
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - Michael B Gottschalk
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, GA, USA
| | - Eric R Wagner
- Department of Orthopaedic Surgery, Emory University School of Medicine, Atlanta, GA, USA.
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Testa EJ, Morrissey P, Albright JA, Levins JG, Marcaccio SE, Badida R, Owens BD. A Posterior Acromial Bone Block Augmentation Is Biomechanically Effective at Restoring the Force Required To Translate the Humeral Head Posteriorly in a Cadaveric, Posterior Glenohumeral Instability Model. Arthroscopy 2024:S0749-8063(24)00058-6. [PMID: 38278462 DOI: 10.1016/j.arthro.2024.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/23/2023] [Accepted: 01/07/2024] [Indexed: 01/28/2024]
Abstract
PURPOSE To assess the biomechanical utility of a posterior acromial bone block (PABB) for the treatment of posterior glenohumeral instability. METHODS Ten fresh-frozen cadaveric specimens were obtained based upon an a priori power analysis. A 2.5-cm scapular spine autograft was harvested from all shoulders. A custom robot device was used to apply a 50-N compressive force to the glenohumeral joint. The humeral head was translated 10 mm posteroinferiorly at 30 degrees from the center of the glenoid at a rate of 1.0 mm/s in 6 consecutive conditions: (1) intact specimen, (2) intact with PABB, (3) posterior capsulolabral tear, (4) addition of the PABB, (5) removal of the PABB and repair of the capsulolabral tear (LR), and (6) addition of the PABB with LR. The maximum force required to obtain this translation was recorded. Paired t tests were performed to compare relevant testing conditions. RESULTS Ten cadavers with a mean ± SD age of 54.4 ± 13.1 years and mean ± SD glenoid retroversion of 6.5 ± 1.0 degrees were studied. The PABB provided greater resistance force to humeral head translation compared to the instability state (instability, 29.3 ± 15.3 N vs PABB, 47.6 ± 21.0 N; P = .001; 95% confidence interval [CI], -27.6 to -10.0). When comparing PABB to LR, the PABB produced higher resistance force than LR alone (PABB, 47.6 ± 21.0 N; LR, 34.2 ± 20.5 N; P = .012; 95% CI, -23.4 to -4.1). An instability lesion treated with the PABB, with LR (P = .056; 95% CI, -0.30 to 20.4) or without LR (P = .351; 95% CI, -6.8 to 15.7), produced resistance forces similar to the intact specimen. CONCLUSIONS A PABB is biomechanically effective at restoring the force required to translate the humeral head posteriorly in a cadaveric, posterior glenohumeral instability model. A posterior acromial bone block is a biomechanically feasible option to consider in patients with recurrent posterior instability. CLINICAL RELEVANCE Augmentation of the posterior acromion may be a biomechanically feasible option to treat posterior shoulder instability.
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Affiliation(s)
- Edward J Testa
- Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A..
| | - Patrick Morrissey
- Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A
| | - J Alex Albright
- Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A
| | - James G Levins
- Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A
| | - Stephen E Marcaccio
- Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A
| | - Rohit Badida
- Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A
| | - Brett D Owens
- Department of Orthopaedic Surgery, Brown University, Warren Alpert School of Medicine, Providence, Rhode Island, U.S.A
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Gaj E, Pagnotta SM, Berlinberg EJ, Patel HH, Picconi O, Redler A, De Carli A. Intraoperative navigation system use increases accuracy of glenoid component inclination but not functional outcomes in reverse total shoulder arthroplasty: a prospective comparative study. Arch Orthop Trauma Surg 2024; 144:91-102. [PMID: 37650896 DOI: 10.1007/s00402-023-05038-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 08/14/2023] [Indexed: 09/01/2023]
Abstract
BACKGROUND While the use of computer-assisted navigation systems in prosthetic implantation is steadily increasing, its utility in reverse shoulder arthroplasty (RSA) remains unclear. The purpose of this study was to evaluate the clinical utility of an intraoperative navigation system in patients undergoing RSA. MATERIALS AND METHODS Patients undergoing navigated or standard RSA at a single institution between September 2020 and December 2021 were prospectively enrolled. Exclusion criteria included noncompliance with study procedures or humeral fracture. Outcome measures included postoperative version and inclination, range of motion (ROM), complications, and patient-reported outcome measurements (PROMs: American Shoulder and Elbow Surgeons score [ASES], Disabilities of the Arm, Shoulder, and Hand score [DASH], Simple Shoulder Test [SST], and Visual Analog Scale [VAS]) at final follow-up. RESULTS The final cohort contained 16 patients with navigation and 17 with standard RSA at a mean follow-up of 16 months (range 12-18 months). Average age was 72 years (range 66-80 years), 8 male (24%) and 25 female (76%). There were no differences in demographics between groups (p > 0.05). At baseline, the navigated group had a greater proportion of Walch B1 and B2 glenoids (p = 0.04). There were no differences between groups regarding baseplate type and native/planned/postoperative glenoid version and inclination. In both groups, planned and postoperative versions were not significantly different (p = 0.76). Patients who did not have navigation demonstrated significant differences between planned and postoperative inclination (p = 0.04), while those with navigation did not (p = 0.09). PROM scores did not differ between groups at final follow-up for SST (p = 0.64), DASH (p = 0.38), ASES (p = 0.77), or VAS (p = 0.1). No difference in final ROM was found between groups (p > 0.05). Over 50% of all screws in both groups were positioned outside the second cortex (p = 0.37), albeit with no complications. CONCLUSIONS There were no statistically significant differences in ROM, PROMs, and satisfaction between patients receiving computer-navigated and standard RSA at a short-term follow-up. Despite more severe preoperative glenoid erosion in the navigated group, all patients were able to achieve an appropriate neutral axis postoperatively. The cost effectiveness and appropriate use of computer-navigated RSA warrant specific investigation in future studies. LEVEL OF EVIDENCE II, prospective cohort study. TRIAL REGISTRATION 9/1/2020 to 12/31/2021.
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Affiliation(s)
- Edoardo Gaj
- Orthopaedic Unit and Kirk Kilgour Sports Injury Center, S. Andrea Hospital, University of Rome "Sapienza", Via di Grottarossa 1035-1039, 00189, Rome, Italy.
- Ospedale Israelitico di Roma, Rome, Italy.
| | - Susanna M Pagnotta
- Orthopaedic Unit and Kirk Kilgour Sports Injury Center, S. Andrea Hospital, University of Rome "Sapienza", Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Elyse J Berlinberg
- Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL, USA
| | - Harsh H Patel
- Midwest Orthopaedics at Rush, Rush University Medical Center, Chicago, IL, USA
| | - Orietta Picconi
- National HIV/AIDS Research Center, Istituto Superiore di Sanità, Rome, Italy
| | - Andrea Redler
- Orthopaedic Unit and Kirk Kilgour Sports Injury Center, S. Andrea Hospital, University of Rome "Sapienza", Via di Grottarossa 1035-1039, 00189, Rome, Italy
| | - Angelo De Carli
- Orthopaedic Unit and Kirk Kilgour Sports Injury Center, S. Andrea Hospital, University of Rome "Sapienza", Via di Grottarossa 1035-1039, 00189, Rome, Italy
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Silva FD, Ramachandran S, Chhabra A. Glenohumeral osteoarthritis: what the surgeon needs from the radiologist. Skeletal Radiol 2023; 52:2283-2296. [PMID: 36287234 DOI: 10.1007/s00256-022-04206-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/06/2022] [Accepted: 10/09/2022] [Indexed: 02/02/2023]
Abstract
Glenohumeral osteoarthritis (GHOA) is a widely prevalent disease with increasing frequency due to population aging. Both clinical manifestations and radiography play key roles in the initial diagnosis, staging, and management decisions. Radiographic disease progression evaluation is performed using validated staging systems, such as Kellgren and Lawrence, Samilson, and Hamada. For young patients with mild to moderate GHOA and failed conservative treatment, arthroscopic preservation surgery (APS) is usually considered. Older patients and those with severe GHOA benefit from different types of arthroplasties. Preoperative magnetic resonance imaging (MRI) is essential for APS surgical planning, as it maps repairable labral, cartilage, and rotator cuff lesions. For arthroplasty planning, the status of glenoid cartilage and intactness of rotator cuff as well as glenoid morphology represent key factors guiding the decision regarding the most suitable hardware design, whether resurfacing, partial, total, or reverse joint replacement. Pre-surgical MRI or alternatively computed tomography arthrogram is employed to evaluate the cartilage and rotator cuff. Finally, three-dimensional computed tomography (3D CT) is indicated to optimally assess the glenoid morphology (to determine Walch classification, version, inclination, and bone loss) and analyze the necessity for glenoid osteotomy or graft augmentation to correct the glenoid structural abnormalities for future success and longevity of the shoulder implants or chosen constructs. Understanding the purpose of each imaging and treatment modality allows more efficient image interpretation. This article reviews the above concepts and details what a surgeon needs from a radiologist and could benefit from accurate reporting of preoperative imaging studies.
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Affiliation(s)
| | | | - Avneesh Chhabra
- Musculoskeletal Radiology, UT Southwestern, Dallas, TX, 75390-9178, USA.
- Orthopedic Surgery, UT Southwestern, Dallas, TX, 75390-9178, USA.
- Johns Hopkins University, Baltimore, MD, USA.
- University of Dallas, Irving, TX, USA.
- Walton Centre for Neuroscience, Liverpool, UK.
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Mathon P, Chivot M, Galland A, Airaudi S, Gravier R. Pyrolytic carbon head shoulder arthroplasty: CT scan glenoid bone modeling assessment and clinical results at 3-year follow-up. JSES Int 2023; 7:2476-2485. [PMID: 37969536 PMCID: PMC10638580 DOI: 10.1016/j.jseint.2023.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023] Open
Abstract
Background The aim of this study is to report the radiological glenoid modifications and clinical outcomes at 3 years mean follow-up of hemi shoulder arthroplasty (HA) with pyrocarbon (PYC) humeral head. Our hypothesis was that the PYC implants would provide good outcomes without major glenoid erosion. Additionally, we hypothesized that HA-PYC allowed for remodeling of the bone. Methods Patients underwent HA with PyC humeral head for treatment of primary or secondary osteoarthritis, excluding post-traumatic cases. All patients had a Constant Score assessed preoperatively and at the last follow-up. Preoperative and postoperative computed tomography scans at the last follow-up were performed to achieve 3-dimensional reconstructions of the scapulae. Deformities of the glenoid surface were analyzed as a distance differential between postoperative and preoperative to investigate potential bone remodeling vs. glenoid erosion. The subluxation index (SLI) was measured. Results We included 41 patients implanted with a HA-PYC. Average age at the time of implant was 63.8 (40 to 79 years). All patients were followed for ≥2 years with an average follow-up of 36.3 months (24 to 60 months). Constant Scores increased from 34 at baseline to 80 at the last follow-up points on average (P < .01). Return to work rate was 100% and 96% had resumed their physical activity. Ten (77%) of the 13 patients with posterior head subluxation had normalized their SLI. Furthermore, no significant differences were detected between the individuals having corrected their posterior subluxation and the others (preoperative SLI between 0.45 and 0.55). Glenoid wear is less than 0.6 mm at 3 years mean follow-up, ie, 5 times less than metallic implants. A tendency to recenter the head in the anteroposterior plane was found in type B glenoid, without increased erosion of the glenoid, with very good clinical results. We did not find any difference according to age or glenoid type for clinical and radiological results. Conclusion HA-PYCs give, in the short term, excellent clinical results in terms of pain and function. The development of a precise and objective measurement method has made it possible to demonstrate that the glenoid surface is the site of modifications that may be part of bone remodeling or progression of the osteoarthritis disease.
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Affiliation(s)
- Pauline Mathon
- Aix-Marseille University, CNRS, ISM UMR 7287, Marseille 13288, France
| | - Matthieu Chivot
- Clinique Monticelli-Vélodrome (Groupe Ramsay Santé), Marseille, France
- Hopital Privé Clairval (Groupe Ramsay Santé), Marseille, France
- Institut de la Main et du Membre Supérieur (IMMS), Marseille, France
| | - Alexandre Galland
- Clinique Monticelli-Vélodrome (Groupe Ramsay Santé), Marseille, France
- Institut de la Main et du Membre Supérieur (IMMS), Marseille, France
| | - Stéphane Airaudi
- Clinique Monticelli-Vélodrome (Groupe Ramsay Santé), Marseille, France
- Institut de la Main et du Membre Supérieur (IMMS), Marseille, France
| | - Renaud Gravier
- Clinique Monticelli-Vélodrome (Groupe Ramsay Santé), Marseille, France
- Institut de la Main et du Membre Supérieur (IMMS), Marseille, France
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Hinse S, Pastor T, Hasler A, Ernstbrunner L, Wieser K, Gerber C. Mid- to Long-term Clinical and Radiological Results of Anatomic Total Shoulder Arthroplasty in patients with B2 Glenoids. JSES Int 2023. [DOI: 10.1016/j.jseint.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
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Hall T, Wong JRY, Dirckx M, Rajesparan K, Rashid A. Pre-operative arthritic glenoid assessment: 3D automated planning software versus manual multiplanar measurements of version and inclination. J Orthop 2023; 36:24-28. [PMID: 36582547 PMCID: PMC9793237 DOI: 10.1016/j.jor.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/26/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Background Preoperative CT-based planning is established in shoulder arthroplasty surgery. Automated planning software has become available to assist the surgeon and may increase reliability and efficiency. This study aims to evaluate the reliability of an automated 3-dimensional (3D) planning software package (Blueprint™ v2.1.5, Wright Medical Ltd) in the assessment of the arthritic shoulder against manual multiplanar measurement (MM). Methods 74 CT studies acquired for preoperative shoulder arthroplasty planning were reviewed on two occasions by four different evaluators, taking manual measurement (MM) of glenoid version and inclination adjusted with multiplanar reformation and adhering to modified Freidman and Maurier methods. 15 scans were not processed by Blueprint due to incompatible scanning protocols or severe scapular dysmorphia. 59 Blueprint measures were compared with the manual data. Results Version: Intra-observer reliability of glenoid version MM was excellent (mean ICC 0.92). Inter-observer reliability between all four readers was good (ICC 0.89). A Bland-Altman analysis of Blueprint versus MM for version measurements demonstrated a mean pair difference of -5.77 (95% CI -7.25 to 4.29). Inclination: Intra-rater and inter-rater reliabilities were good (ICC 0.85 and 0.80 respectively). Blueprint and MM values for inclination followed a more convergent pattern than for version. Bland-Altman analysis for inclination did not show substantial bias, with a mean pair difference of 1.4 (95% CI -0.1 to 2.9). Conclusion Manual preoperative planning for shoulder arthroplasty is time consuming and requires experience. Automated 3D planning offers a consistent tool to assist the surgeon, notwithstanding intra-operative anatomical and technical variation, and margin of error. Surgeons should as ever be mindful of the specifics of a given automated program and our data quantified a bias for retroversion which may be important for measures close to the thresholds for augmentation or customised implants.
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Affiliation(s)
- Tim Hall
- Department of Radiology, University Hospital Lewisham (Lewisham and Greenwich NHS Trust), Lewisham High Street, London, SE13 6LH, United Kingdom
| | | | - Margo Dirckx
- Department of Trauma and Orthopaedic Surgery, Epsom and St Helier University Hospitals NHS Trust, Dorking Rd, Epsom, KT18 7EG, United Kingdom
| | - Kannan Rajesparan
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, 235 Euston Rd, London, NW1 2BU, United Kingdom
| | - Abbas Rashid
- Department of Trauma and Orthopaedic Surgery, University College London Hospitals NHS Foundation Trust, 235 Euston Rd, London, NW1 2BU, United Kingdom
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Wilder L, Simon P, Reyes J, Diaz M, Munassi S, Frankle MA. Three-Dimensional Scapular Border Method for Glenoid Version Measurements. JB JS Open Access 2023; 8:JBJSOA-D-22-00105. [PMID: 36733708 PMCID: PMC9886516 DOI: 10.2106/jbjs.oa.22.00105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Variations among methods to measure glenoid version have created uncertainty regarding which method provides the most consistent measurements of morphology. Greater deformity may also make accurate depiction of the native morphology more challenging. This study examined 4 current methods (Friedman, corrected Friedman, Ganapathi-Iannotti, and Matsumura) and an experimental scapular border-derived coordinate system method, to compare measurement inconsistencies between methods and reference systems and assess the impact of glenoid deformity on measured glenoid version. Methods Three-dimensional scapulae were created from computed tomography (CT) scans of 74 shoulders that had undergone arthroplasty (28 A2, 22 B2, 10 B3, and 14 C glenoids) and 34 shoulders that had not undergone arthroplasty. Glenoid version measurements were made in Mimics using the 4 methods. For the experimental method, scapulae were reconstructed, and 3 orthogonal global coordinate planes (GCPs) were derived from the medial and lateral borders. Version was measured as the angle between the sagittal reference plane and an anterior-posterior glenoid vector. The intraclass correlation coefficient (ICC) was calculated for the Friedman and corrected Friedman methods. Inconsistencies were assessed for all methods using the interquartile range, mean and standard deviation, and repeated-measures analysis of variance. Concordance correlation coefficients (CCCs) were calculated to assess agreement among the methods. Results Scapular plane-based methods (experimental, Friedman, and corrected Friedman) yielded an average version between -10° and -12°, with average measurement differences among these methods of <2°. Vault methods (Ganapathi-Iannotti and Matsumura) overestimated or underestimated version by an average of 5° to 7° compared with scapular plane-based methods, and showed significant differences of >12° when compared with each other. Scapular plane-based methods maintained consistency with increasing deformity. Conclusions The other methods of version measurement using the scapular planes as the reference were highly comparable with the corrected Friedman method. However, when the reference plane was the glenoid vault, version measurements were inconsistent with scapular plane-based methods, which is attributed to differences in the reference systems. In surgical planning, the coordinate system utilized will impact version measurements, which can result in variations in the planned surgical solutions. Additionally, as glenoid deformity increases, this variation resulting from the utilization of different coordinate systems is magnified.
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Affiliation(s)
- Lauren Wilder
- Foundation for Orthopaedic Research and Education, Tampa, Florida
| | - Peter Simon
- Foundation for Orthopaedic Research and Education, Tampa, Florida,Department of Medical Engineering, College of Engineering and Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Justin Reyes
- Department of Pathology & Cell Biology, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Miguel Diaz
- Foundation for Orthopaedic Research and Education, Tampa, Florida
| | - Steven Munassi
- Foundation for Orthopaedic Research and Education, Tampa, Florida
| | - Mark A. Frankle
- Shoulder & Elbow Department, Florida Orthopaedic Institute, Tampa, Florida,Department of Orthopaedics and Sports Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida,Email for corresponding author:
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Creighton RA, Burrus MT, Werner BC, Gobezie R, Lederman E, Denard PJ. Short-term clinical and radiographic outcomes of a hybrid all-polyethylene glenoid based on preoperative glenoid morphology. J Shoulder Elbow Surg 2022; 31:2554-2561. [PMID: 35750156 DOI: 10.1016/j.jse.2022.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/08/2022] [Accepted: 05/23/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND The primary purpose of this study was to compare 2-year anatomic total shoulder arthroplasty (TSA) functional and radiographic outcomes between Walch type A and B glenoids treated with an all-polyethylene glenoid designed for hybrid fixation with peripheral cement and central osseous integration. The secondary purpose was to evaluate outcomes based on central peg technique. The hypotheses were that there would be no difference in short-term radiographic or functional outcome scores based on preoperative glenoid morphology or central peg technique. METHODS We performed a multicenter retrospective review of patients who underwent TSA with the same hybrid all-polyethylene glenoid and had minimum 2-year follow-up. Patient-reported outcomes and radiographic outcomes were analyzed based on preoperative Walch morphology and central peg technique. Radiographic analysis included preoperative glenoid morphology; preoperative and postoperative glenoid version, glenoid inclination, and posterior humeral head subluxation; and postoperative glenoid radiolucencies according to the Wirth and Lazarus classifications. RESULTS A total of 266 patients with a mean age of 64.9 ± 8.2 years were evaluated at a mean of 28 months postoperatively. Postoperatively, there were significant improvements in all functional outcome measures (P < .001), range-of-motion measures (forward elevation, external rotation at 0°, external rotation at 90°, internal rotation by spinal level, and internal rotation at 90°; P < .001), and strength measures (Constant, external rotation, and modified belly press; P < .001). There were no clinically meaningful differences in functional outcomes or statistically significant differences in radiographic appearance between Walch type A and B glenoids. Subgroup analysis revealed that glenoids with a cemented central peg had the worst radiographic outcomes based on Lazarus scoring. CONCLUSION Patients undergoing TSA with a hybrid in-line pegged glenoid have excellent clinical outcomes at short-term follow-up regardless of preoperative glenoid morphology. Different central peg techniques do not appear to play a significant role in the risk of glenoid component lucencies at 2 years postoperatively.
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Antonacci CL, Abdelshahed M, Omari A, Cutalo M, Fritz RC, Alberta FG. Description and Validation of the Anterior Glenoid Angle: A Novel MRI-Based Measure of Glenoid Morphologic Features and Version. Orthopedics 2022; 45:361-366. [PMID: 35858179 DOI: 10.3928/01477447-20220706-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The goal of this study was to establish a normal value for, and evaluate the reliability of, a new measurement of glenoid morphologic features using magnetic resonance imaging: the anterior glenoid angle. A total of 90 magnetic resonance imaging scans of patients without shoulder arthritis were reviewed. The anterior glenoid angle of each glenoid was measured by 4 blinded physicians. The images were randomized and measured again. Finally, the Friedman angle was measured on the same images for reference. Descriptive statistics and inter- and intraclass correlation coefficients were calculated. The mean anterior glenoid angle was 60.4°±3.6°. Of the measured values, 77% were between 56° and 64°. Intraobserver reliability was very good to excellent in single measure (range, 0.763-0.901) and mean measure (range, 0.865-0.948) comparisons. Interobserver reliability was very good to excellent in both single measure (0.769) and mean measure (0.964) comparisons. The mean Friedman angle was 10.2°. Correlation between the anterior glenoid angle and Friedman angle ranged from a moderate negative (-0.496) to a strong negative correlation (-0.711) among the observers. The mean anterior glenoid angle measured via magnetic resonance imaging scan was 60.4° in normal shoulders, and more than 75% of the values were within 4° of the mean. The anterior glenoid angle has excellent inter- and intrarater reliability without using computed tomography scan or including the entire scapula in the field of view. The anterior glenoid angle has a good to very good negative correlation with the Friedman angle because decreasing anterior glenoid angles indicate increasing retroversion. [Orthopedics. 2022;45(6):361-366.].
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Rajeswaran G, Basu S, Funk L. Imaging Posterior Instability of the Shoulder. Semin Musculoskelet Radiol 2022; 26:558-565. [DOI: 10.1055/s-0042-1754365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
AbstractPosterior instability of the shoulder is much less common than anterior instability with a clinical presentation that is often less obvious, making the diagnosis more challenging and more easily missed. We describe the imaging findings of posterior instability so the radiologist can make the diagnosis and provide a detailed description, enabling the surgeon to make more informed decisions regarding management and surgery.
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Affiliation(s)
- Gajan Rajeswaran
- Department of Imaging, OneWelbeck Imaging & Diagnostics, London, United Kingdom
| | - Subhasis Basu
- Department of Imaging, Wrightington Hospital, Wigan, Lancashire, United Kingdom
| | - Lennard Funk
- Department of Orthopaedics, Wrightington Hospital, Wigan, Lancashire, United Kingdom
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Considerations for Shoulder Arthroplasty Implant Selection in Primary Glenohumeral Arthritis With Posterior Glenoid Deformity. J Am Acad Orthop Surg 2022; 30:e1240-e1248. [PMID: 36027046 DOI: 10.5435/jaaos-d-21-01219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 06/22/2022] [Indexed: 02/01/2023] Open
Abstract
Glenoid deformity has an important effect on outcomes and complication rates after shoulder arthroplasty for primary glenohumeral arthritis. The B2/B3 glenoid has particularly been associated with a poorer outcome with shoulder arthroplasty compared with other glenoid types. One of the primary challenges is striking a balance between deformity correction and joint line preservation. Recently, there has been a proliferation of both anatomic and reverse implants that may be used to address glenoid deformity. The purpose of this review was to provide an evidence-based approach for addressing glenoid deformity associated with primary glenohumeral arthritis.
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The Effect of Glenoid Version on Glenohumeral Instability. J Am Acad Orthop Surg 2022; 30:e1165-e1178. [PMID: 36166388 DOI: 10.5435/jaaos-d-22-00148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 06/01/2022] [Indexed: 02/01/2023] Open
Abstract
In recent years, an appreciation for the dynamic relationship between glenoid and humeral-sided bone loss and its importance to the pathomechanics of glenohumeral instability has substantially affected modern treatment algorithms. However, comparatively less attention has been paid to the influence of glenoid version on glenohumeral instability. Limited biomechanical data suggest that alterations in glenoid version may affect the forces necessary to destabilize the glenohumeral joint. However, this phenomenon has not been consistently corroborated by the results of clinical studies. Although increased glenoid retroversion may represent an independent risk factor for posterior glenohumeral instability, this relationship has not been reliably observed in the setting of anterior glenohumeral instability. Similarly, the effect of glenoid version on the failure rates of surgical stabilization procedures remains poorly understood.
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16
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Standard radiological classification of glenohumeral osteoarthritis does not correlate with the complexity of the arthritic glenoid deformity. Arch Orthop Trauma Surg 2022; 142:1413-1420. [PMID: 33507378 DOI: 10.1007/s00402-021-03758-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 01/01/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND The Samilson-Prieto classification (SPC) depending on the humeral osteophyte length on a-pX-rays today is widely used to classify glenohumeral osteoarthritis in general. For treatment planning and prognosis, the patho-morphology of the glenoid and static posterior subluxation of the humeral head classified according to Walch is of much higher importance. Here, usually a CT or MRI scan is required for a correct classification. A possible correlation between both classifications is poorly explored. Without it, the complexity of the case might be mis-interpreted using the SPC. The aim of this study was to investigate such a correlation, i.e. whether it correlates with the glenoid deformity and degree of humeral head subluxation. PATIENTS AND METHODS Radiological datasets (X-ray and CT or MRI) of 352 patients with primary OA of the shoulder were evaluated by two observers experienced in shoulder surgery. For the Samilson-Prieto classification, true a-p shoulder radiographs and for the modified Walch classification CT or MRI scans in the axial plane were interpreted using a validated method. To investigate a correlation between both classifications, the Fisher's exact test was used. For the interobserver reliability, the weighted kappa coefficient κ was determined. RESULTS For the Walch classification, both observers found a similar percentage for the different types, with decreasing numbers from normal (type A1) to severely altered glenoids In the Samilson-Prieto classification, OA grade I was predominant, while grade II and III showed a relatively equal distribution. Interobserver reliability was high both for the Walch classification with a κ 0.923 (95% confidence interval 0.892; 0.954) and) for the SPC with a κ 0.88 (95% confidence interval 0.843; 0.916). A correlation between the two classifications in Fischer's exact test could not be shown (p = 0.584). DISCUSSION Since there is no correlation between both, using the Samilson-Prieto classification alone might miss relevant prognostic factors in gleno-humeral OA. Adequate imaging of the glenoid morphology also in the axial plane is absolutely mandatory to understand the complexity and chose the right treatment for each patient. LEVEL OF EVIDENCE Study of Diagnostic Test-Level II.
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Vetter P, Magosch P, Habermeyer P. Is there a correlation between humeral osteoarthritis and glenoid morphology according to Walch? Bone Jt Open 2022; 3:463-469. [PMID: 35673934 PMCID: PMC9233425 DOI: 10.1302/2633-1462.36.bjo-2022-0028.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aims The aim of this study was to determine whether there is a correlation between the grade of humeral osteoarthritis (OA) and the severity of glenoid morphology according to Walch. We hypothesized that there would be a correlation. Methods Overal, 143 shoulders in 135 patients (73 females, 62 males) undergoing shoulder arthroplasty surgery for primary glenohumeral OA were included consecutively. Mean age was 69.3 years (47 to 85). Humeral head (HH), osteophyte length (OL), and morphology (transverse decentering of the apex, transverse, or coronal asphericity) on radiographs were correlated to the glenoid morphology according to Walch (A1, A2, B1, B2, B3), glenoid retroversion, and humeral subluxation on CT images. Results Increased humeral OL correlated with a higher grade of glenoid morphology (A1-A2-B1-B2-B3) according to Walch (r = 0.672; p < 0.0001). It also correlated with glenoid retroversion (r = 0.707; p < 0.0001), and posterior humeral subluxation (r = 0.452; p < 0.0001). A higher humeral OL (odds ratio (OR) 1.17; 95% confidence interval (CI) 1.03 to 1.32; p = 0.013), posterior humeral subluxation (OR 1.11; 95% CI 1.01 to 1.22; p = 0.031), and glenoid retroversion (OR 1.48; 95% CI 1.30 to 1.68; p < 0.001) were independent factors for a higher glenoid morphology. More specifically, a humeral OL of ≥ 13 mm was indicative of eccentric glenoid types B2 and B3 (OR 14.20; 95% CI 5.96 to 33.85). Presence of an aspherical HH in the coronal plane was suggestive of glenoid types B2 and B3 (OR 3.34; 95% CI 1.67 to 6.68). Conclusion The criteria of humeral OL and HH morphology are associated with increasing glenoid retroversion, posterior humeral subluxation, and eccentric glenoid wear. Therefore, humeral radiological parameters might hint at the morphology on the glenoid side. Cite this article: Bone Jt Open 2022;3(6):463–469.
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Affiliation(s)
- Philipp Vetter
- German Shoulder Centre, ATOS Clinic Munich, Munich, Germany
| | - Petra Magosch
- Orthopaedic and Trauma Surgery Center, University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany
- Shoulder Centre Prof. Habermeyer, Munich, Germany
| | - Peter Habermeyer
- German Shoulder Centre, ATOS Clinic Munich, Munich, Germany
- Shoulder Centre Prof. Habermeyer, Munich, Germany
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Robertson DD, Sharma GB, McMahon PJ, Karas SG. Glenoid Version Assessment When the CT Field of View Does Not Permit the Friedman Method: The Robertson Method. Orthop J Sports Med 2022; 10:23259671221083589. [PMID: 35571972 PMCID: PMC9096205 DOI: 10.1177/23259671221083589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 12/23/2021] [Indexed: 11/20/2022] Open
Abstract
Background: To improve spatial resolution, current clinical shoulder cross-sectional imaging studies reduce the field of view of the shoulder, excluding the medial scapula border and preventing glenoid version measurement according to the Friedman method. Purpose: To evaluate a method to accurately and reliably measure glenoid version on cross-sectional shoulder images when the medial scapula border is not included in the field of view, and to establish measurements equivalent to the Friedman method. Study Design: Controlled laboratory study. Methods: Sixty-five scapulae underwent computed tomography (CT) scanning with an optimal shoulder CT-positioning protocol. Glenoid version was measured on CT images of the full scapula using the Friedman method. We developed a measurement method (named the Robertson method) based on the glenoid vault version from partial scapula images, with a correction angle subtracted from the articular-surface-glenoid vault measurement. Comparison with the Friedman method defined the accuracy of the Robertson method. Three observers tested inter- and intraobserver reliability of the Robertson method. Accuracy was statistically evaluated with t tests and reliability with the intraclass correlation coefficient (ICC). Results: The statistical distribution of glenoid version was similar to published data,–0.5° ± 3° [mean ± SD]. The initial measurement using the Robertson method resulted in a more retroverted angle compared with the Friedman method, and a correction angle of 7° was then applied. After this adjustment, the difference between the 2 methods was nonsignificant (0.1° ± 4°; P > .65). Reliability of the Robertson method was excellent, as the interrater ICC was 0.77, the standard error of measurement (SEM) was 1.1° with P < .001. The intrarater ICC ranged between 0.84 and 0.92, the SEM ranged between 0.9° and 1.2° with P < .01. Conclusion: A validated glenoid version measurement method is now available for current clinical shoulder CT protocols that reliably create Friedman-equivalent values. Clinical Relevance: Friedman-equivalent values may be made from common clinical CTs of the shoulder and compared with prior and future Friedman measurements of the scapula.
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Affiliation(s)
- Douglas D. Robertson
- Author deceased
- Emory Orthopaedics and Spine Center, Atlanta, Georgia, USA
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
| | - Gulshan B. Sharma
- Department of Psychiatry, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Patrick J. McMahon
- VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA
- Department of Orthopedic Surgery and Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Spero G. Karas
- Emory Orthopaedics and Spine Center, Atlanta, Georgia, USA
- Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
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Lionel N, Falk G, Simon R, Yoshihiro H. Walch B2 glenoids. 2D vs 3D comparison of humeral head subluxation and glenoid retroversion. JSES Int 2022; 6:421-428. [PMID: 35572433 PMCID: PMC9091791 DOI: 10.1016/j.jseint.2022.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background The posterior subluxation and glenoid version in Walch B2 glenoids are routinely assessed by 2-dimensional (2D) computed tomography (CT). Different methods of calculation are used to analyze these parameters. Alternatively, the rising use of 3-dimensional (3D) planification tools in arthroplasty requires the clarification if the 3D measurements are equivalent to 2D. The aim of this study was to compare B2 glenoids characteristics between 2D CT assessment method and 3D automated software method. Methods CT scans from patients who underwent a shoulder arthroplasty were identified. In the 2D method, measurement of glenoid version was determined. Measurement of the humeral head subluxation (HHS) (scapula axis method) was determined by the percentage of the humeral head posterior to the Friedman line (scapula axis). Three-dimensional analysis allowed an automated segmentation of the humerus and scapula, definition of scapular planes, and determination of glenoid version and HHS. Results Fifty-one CT scans met inclusion criteria. The intraobserver and interobserver reliability of the 2D retroversion (RV) and 2D HHS intraclass correlation coefficient was excellent (intraclass correlation coefficient>0.9).The median RV was 16° [12-20] in 2D and 19° [16-23] in 3D (P < .0001). The median subluxation was 71% [66-75] in 2D and 81% [78-86] in 3D (P < .0001). Linear regression analysis demonstrated low positive correlation between RV and subluxation in 2D and 3D (R2 = 0.31 and R2 = 0.23, respectively). Discussion/Conclusion The assessment of version and HHS in Walch B2 glenoids between 2D CT and a 3D planification were significantly different. Low correlation between RV and HHS was observed (2D and 3D assessment).
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Biconcave glenoids show 3 differently oriented posterior erosion patterns. J Shoulder Elbow Surg 2021; 30:2620-2628. [PMID: 33964426 DOI: 10.1016/j.jse.2021.04.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Posterior glenoid wear remains a challenge in anatomic and reverse total shoulder arthroplasty (rTSA) because of an asymmetric erosion with altered retroversion. The purpose of this study was to assess glenoid morphology and evaluate the influence of acromial orientation in posterior glenoid erosion patterns by using 3-dimensional (3D) models. MATERIAL AND METHODS Computed tomographic (CT) shoulder scans from 3 study centers of patients awaiting rTSA between 2017 and 2018 were converted into 3D models and analyzed by 2 observers. Morphology, orientation and greatest depth of erosion, inclination, current retroversion and premorbid retroversion, surface areas of the glenoid, and external acromial orientation and posterior acromial slope were assessed. Measurements were compared between wear patterns, glenoid erosion entities, and genders. RESULTS In the complete cohort of 68 patients (63.8 ± 10.0 years; 19 female, 49 male), a mean of 85.9° (±22.2°) was observed for the glenoid erosion orientation. Additionally, a further distinct classification of the glenoid erosion as posterior-central (PC, n = 39), posterior-inferior (PI, n = 12), and posterior-superior (PS, n = 17) wear patterns was possible. These wear patterns significantly (P < .001) distinguished by erosion orientation (PC = 86.9° ± 12.0°, PI = 116.3° ± 10.3°, PS = 62.3° ± 18.9°). The greatest depth of erosion found was 7.3 ± 2.7 mm in PC wear patterns (PC vs. PI: P = .03; PC vs. PS: n.s.; PI vs. PS: n.s.). Overall, the observed erosion divided the glenoid surface into a paleoglenoid proportion of 48% (±11%) and a neoglenoid proportion of 52% (±12%). For the complete cohort, glenoid inclination was 85.4° (±6.6°), premorbid glenoid retroversion was 80.7° (±8.1°), and current glenoid retroversion was 73.4° (±7.4°), with an estimated increase of 6.9° (±6.0°). The mean external acromial orientation was 118.2° (±8.9°), and the mean posterior acromial slope was 107.2° (±9.6°). There were no further significant differences if parameters were compared by wear patterns, entities, and gender. CONCLUSION Three significantly differently oriented wear patterns (posterior-superior, posterior-central, and posterior-inferior) were distinguished in shoulders demonstrating posterior wear on axillary imaging. No significant differences between the observed erosion patterns or any relevant correlations were found regarding the orientation of the acromion.
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21
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Imai S. A Sequential Approach to the Management of Posterior Glenoid Defects in RSA: Angulated BIO Versus Multiple Bioresorbable Pinning-Assisted Structural Bone-Grafting. JB JS Open Access 2021; 6:JBJSOA-D-21-00049. [PMID: 34703962 PMCID: PMC8542136 DOI: 10.2106/jbjs.oa.21.00049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Large posterior glenoid defects pose problems in reverse shoulder arthroplasty (RSA). We have adopted a sequential approach to the management of posterior glenoid defects using asymmetrical reaming, the placement of a ring graft around the central peg (bony-increased offset, or BIO), or structural bone-grafting, depending on the amount of glenoid retroversion. Furthermore, we have devised multiple bioresorbable pinning (MBP)-assisted bone-grafting, in which as many bioresorbable pins as required are inserted, from whichever aspects of the graft necessary, to achieve initial stability.
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Affiliation(s)
- Shinji Imai
- Shiga University of Medical Science Hospital, Otsu, Shiga, Japan.,Department of Orthopaedic Surgery, Shiga University of Medical Science, Otsu, Shiga, Japan
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22
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Gauci MO, Athwal GS, Sanchez-Sotelo J, Chaoui J, Urvoy M, Boileau P, Walch G. Identification of threshold pathoanatomic metrics in primary glenohumeral osteoarthritis. J Shoulder Elbow Surg 2021; 30:2270-2282. [PMID: 33813011 DOI: 10.1016/j.jse.2021.03.140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 03/10/2021] [Accepted: 03/22/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND An assessment of the pathoanatomic parameters of the arthritic glenohumeral joint (GHJ) has the potential to identify discriminating metrics to differentiate glenoid types in shoulders with primary glenohumeral osteoarthritis (PGHOA). The aim was to identify the morphometric differences and threshold values between glenoid types including normal and arthritic glenoids with the various types in the Walch classification. We hypothesized that there would be clear morphometric discriminators between the various glenoid types and that specific numeric threshold values would allow identification of each glenoid type. METHODS The computed tomography scans of 707 shoulders were analyzed: 585 obtained from shoulders with PGHOA and 122 from shoulders without glenohumeral pathology. Glenoid morphology was classified according to the Walch classification. All computed tomography scans were imported in a dedicated automatic 3D-software program that referenced measurements to the scapular body plane. Glenoid and humeral modeling was performed using the best-fit sphere method, and the root-mean-square error was calculated. The direction and orientation of the glenoid and humerus described glenohumeral relationships. RESULTS Among shoulders with PGHOA, 90% of the glenoids and 85% of the humeral heads were directed posteriorly in reference to the scapular body plane. Several discriminatory pathoanatomic parameters were identified: GHJ narrowing < 3 mm was a discriminatory metric for type A glenoids. Posterior humeral subluxation > 70% discriminated type B1 from normal GHJs. The root-mean-square error was a discriminatory metric to distinguish type B2 from type A, type B3, and normal GHJs. Type B3 glenoids differed from type A2 by greater retroversion (>13°) and subluxation (>71%). The type C glenoid retroversion inferior limit was 21°, whereas normal glenoids never presented with retroversion > 16°. CONCLUSION Pathoanatomic metrics with the identified threshold values can be used to discriminate glenoid types in shoulders with PGHOA.
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Affiliation(s)
- Marc-Olivier Gauci
- Institut Universitaire Locomoteur & Sport, Unité de Recherche Clinique Côte d'Azur (UR2CA), Hôpital Pasteur 2, Université Côte d'Azur, Nice, France.
| | | | | | | | | | - Pascal Boileau
- Institut Universitaire Locomoteur & Sport, Unité de Recherche Clinique Côte d'Azur (UR2CA), Hôpital Pasteur 2, Université Côte d'Azur, Nice, France
| | - Gilles Walch
- Hôpital Privé Jean Mermoz-Generale De Santé (GDS) Ramsay, Lyon, France
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Almeida A, Agostini DC, Nesello PF, de Almeida NC, Mioso R, Agostini AP. Tomographic Analysis of Positioning of Reverse Baseplates Positioning. J Shoulder Elb Arthroplast 2021; 5:2471549220987714. [PMID: 34497966 PMCID: PMC8282139 DOI: 10.1177/2471549220987714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/15/2020] [Accepted: 12/22/2020] [Indexed: 11/17/2022] Open
Abstract
Objective To verify whether reverse baseplate positioning without the support of intraoperative three-dimensional technology is within the acceptable parameters in the literature and whether glenoid bone deformity (GBD) compromises this positioning. Methods Sixty-nine reverse shoulder arthroplasties were evaluated with volumetric computed tomography (CT). Two radiologists performed blinded CT scan analysis and evaluated baseplate position within 2mm of the inferior glenoid; the inclination and version of the baseplate in relation to the Friedman line; and upper and lower screw and baseplate metallic peg end point positionings. The patients were divided according to the presence of GBD for statistical analyses. Results The two radiologists concurred reasonably in their interpretations of the following analyzed parameters: baseplate position within 2mm of the inferior glenoid rim (97.1% and 95.7%), baseplate inclination (82.6% and 81.2%), baseplate version (69.6% and 56.5%), the upper screw reaching the base of the coracoid process (71% and 79.7%), the inferior screw remaining inside the scapula (88.4% and 84.1%), and the metallic peg of the baseplate considered intraosseous (88.4% and 72.5%). Conclusion Reverse baseplate positioning without intraoperative three-dimensional technology is within the acceptable parameters of the literature, except for baseplate version and upper screw position. GBD did not interfere with baseplate positioning in reverse shoulder arthroplasty.
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Affiliation(s)
| | | | | | | | - Rafael Mioso
- Radiologist Physician, General Hospital, Caxias do Sul, Brazil
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24
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Sharifi A, Siebert MJ, Chhabra A. How to Measure Glenoid Bone Stock and Version and Why It Is Important: A Practical Guide. Radiographics 2021; 40:1671-1683. [PMID: 33001780 DOI: 10.1148/rg.2020200008] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Shoulder osteoarthritis (OA) is a common and debilitating condition and a source of high morbidity and medical expenditures across the world among individuals older than 60 years. Shoulder OA results in the gradual destruction of articular cartilage of the humeral head and glenoid component, causing inflammation, pain, and a restricted range of motion. Most patients are diagnosed with shoulder OA after experiencing shoulder pain and stiffness, and the diagnosis is often made after medical and physical histories are obtained and physical and imaging examinations are performed. Use of various surgical techniques such as total anatomic or reverse shoulder arthroplasty and hemiarthroplasty has increased in recent years, resulting in reduced morbidity and improved functional status of patients. However, the rate of surgical complications such as premature loosening of components is significant, reducing the effectiveness of such procedures. Data in the literature indicate that high-grade fatty infiltration of the rotator cuff muscle before surgery is associated with postoperative glenoid component loosening. High-grade rotator cuff fatty infiltration and atrophy have been found to be associated with more severe Walch classification-based glenoid morphology subtypes, increased joint line medialization, glenoid bone loss, and increased pathologic glenoid version. The authors describe how advanced imaging techniques are used for preoperative evaluation of the shoulder and discuss how to measure glenoid version and bone stock and classify glenoid morphology types on the basis of Walch classification, as these parameters are commonly used in surgical planning. Methods involving the use of Friedman and paleoglenoid lines for respective measurements are illustrated by using three-dimensional CT and MRI case examples. ©RSNA, 2020.
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Affiliation(s)
- Arghavan Sharifi
- From the School of Medicine (A.S., M.J.S.) and Department of Radiology and Orthopedic Surgery (A.C.), UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-8585
| | - Matthew J Siebert
- From the School of Medicine (A.S., M.J.S.) and Department of Radiology and Orthopedic Surgery (A.C.), UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-8585
| | - Avneesh Chhabra
- From the School of Medicine (A.S., M.J.S.) and Department of Radiology and Orthopedic Surgery (A.C.), UT Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390-8585
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Hurst SA, Merlini L, Hansen U, Gregory J, Emery R, Gregory T. The Glenoid Vault Outer Cortex a new more accurate radiological reference for shoulder arthroplasty. SICOT J 2021; 7:32. [PMID: 34009116 PMCID: PMC8132599 DOI: 10.1051/sicotj/2021030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/13/2021] [Indexed: 11/17/2022] Open
Abstract
Introduction: Correct positioning of the glenoid component is an important determinant of outcome in shoulder arthroplasty. We describe and assess a new radiological plane of reference for improving the accuracy of glenoid preparation prior to component implantation – the Glenoid Vault Outer Cortex (GvOC) plane. Methods: One hundred and five CT scans of normal scapulae were obtained. Forty six females and 59 males aged between 22 and 30 years. The accuracy of the GvOC plane was then compared against the current “gold standard” – the scapular border (SB). Measurements of glenoid inclination, version, rotation, and offset were obtained using both the GvOC and SB planes. These were then compared to actual values. Results: The mean difference between version obtained using the GvOC plane and the actual value was 1.8° (−2 to 5, SD 1.6) as compared to 6.7° (−2 to 17, SD 4.3) when the SB plane was used, (p < 0.001). The mean difference between estimates of inclination obtained using the GvOC plane and the actual were 1.9° (−4 to 6, SD 1.6) as compared to 11.2° (−4 to 25, SD 6.1) when the SB plane was used, (p < 0.001). Conclusions: The GvOC plane produced estimates of glenoid version and inclination closer to actual values with lower variance than when the SB plane was used. The GvOC may be a more accurate and reproducible radiological method for surgeons to use when defining glenoid anatomy prior to arthroplasty surgery.
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Affiliation(s)
- Simon A Hurst
- Avicenne Teaching Hospital, 125 rue Stalingrad, Bobigny, 93000 Paris, France - Université Paris Sorbonne Nord, Campus de Bobigny, 1, rue de Chablis, Bobigny, 93000 Paris, France - Imperial College, St Mary's Hospital Campus, Queen Elizabeth Queen Mother Building, Praed Street, W2 1NY London, UK
| | - Lorenzo Merlini
- Avicenne Teaching Hospital, 125 rue Stalingrad, Bobigny, 93000 Paris, France - University Sorbonne-Paris-Nord, Equip Projet MOVEO, LaMSN, 99 Avenue Jean Baptiste, Clement, 93430 Villetaneuse, France
| | - Ulrich Hansen
- Imperial College, Department of Mechanical Engineering, South Kensington Campus, SW7 2AZ London, UK
| | - Jules Gregory
- Department of Radiology, Beaujon Hospital, Paris Nord Val de Seine Hospitals, APHP, 100 Avenue du General Leclerc, 92110 Clichy, France
| | - Roger Emery
- Imperial College, St Mary's Hospital Campus, Queen Elizabeth Queen Mother Building, Praed Street, W2 1NY London, UK
| | - Thomas Gregory
- Avicenne Teaching Hospital, 125 rue Stalingrad, Bobigny, 93000 Paris, France - University Sorbonne-Paris-Nord, Equip Projet MOVEO, LaMSN, 99 Avenue Jean Baptiste, Clement, 93430 Villetaneuse, France
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26
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Harding GT, Bois AJ, Bouliane MJ. A novel method for localization of the maximum glenoid bone defect during reverse shoulder arthroplasty. JSES Int 2021; 5:667-672. [PMID: 34223413 PMCID: PMC8245994 DOI: 10.1016/j.jseint.2021.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background Management of glenoid bone defects during reverse shoulder arthroplasty remains a challenge. The aim of our study was to preoperatively localize the maximal depth of glenoid bone defects in relation to glenoid reaming. Methods Thirty preoperative shoulder computed tomography scans were collected. Three assessors created standardized surgical plans, using 3-dimensional (3D) computed tomography–based Blueprint planning software in which the reaming axis was held constant at zero degrees of version and inclination. Each plan resulted in a 2-dimensional (2D) image of the reamer’s contact on the glenoid and a corresponding 3D representation of the glenoid bone defect. The position of the maximum glenoid defect was localized on both the 2D and 3D images. Descriptive statistics were calculated. The correlation between angles from 2D and 3D images was assessed, and intraclass correlation was used to assess inter-rater and intrarater reliability. Results Twenty-eight patients were included. The overall mean difference between 2D and 3D angles was 5.4° (standard deviation 5.2°). The correlation between 2D and 3D angles was almost perfect. Intraclass correlation results demonstrated near-perfect agreement. The maximal glenoid defect was within 5% of a circle (or +/- 9°) from perpendicular to the high-side ream line in 85.1% of comparisons and was within 10% of a circle in 97.6% of comparisons. Conclusion Using Blueprint planning software, we have demonstrated with almost perfect agreement among 3 assessors that when the reaming axis is held constant, the maximum glenoid bone defect is reliably located perpendicular to the glenoid ream line.
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Affiliation(s)
- Graeme T. Harding
- Division of Orthopaedic Surgery, University of Alberta, Edmonton, Alberta, Canada
- Corresponding author: Graeme T. Harding, MASc, MD, FRCSC, CORe Main Office, 6-110 Clinical Sciences Building, Edmonton, Alberta T6G 2G3, Canada.
| | - Aaron J. Bois
- Section of Orthopaedic Surgery, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada
| | - Martin J. Bouliane
- Division of Orthopaedic Surgery, University of Alberta, Edmonton, Alberta, Canada
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27
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Li RT, Sheean A, Wilson K, Sa DD, Kane G, Lesniak B, Lin A. Decreased Glenoid Retroversion Is a Risk Factor for Failure of Primary Arthroscopic Bankart Repair in Individuals With Subcritical Bone Loss Versus No Bone Loss. Arthroscopy 2021; 37:1128-1133. [PMID: 33307148 DOI: 10.1016/j.arthro.2020.11.055] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 11/25/2020] [Accepted: 11/28/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE To determine whether glenoid retroversion is an independent risk factor for failure after arthroscopic Bankart repair. METHODS This was a retrospective review of patients with a minimum 2-year follow-up. In part 1 of the study, individuals with no glenoid bone loss on magnetic resonance imaging (MRI) and who failed arthroscopic Bankart repair (cases) were compared with individuals who did not fail Bankart repair (controls). In part 2 of the study, cases with subcritical (<20%) glenoid bone loss as measured on sagittal T1 MRI sequences who failed arthroscopic Bankart repair were compared with controls who did not. For each part of the study, glenoid version was measured using axial T2 MRI sequences. Positive angular measurements were designated to represent glenoid anteversion, whereas negative measurements were designated to represent glenoid retroversion. Independent t tests were conducted to determine the association between glenoid version and failure after arthroscopic Bankart repair. RESULTS There were 20 cases and 40 controls in part 1 of the study. In part 2, there were 19 cases and 21 controls. There was no difference in baseline characteristics between cases and controls. Among individuals with no glenoid bone loss, there was no difference in glenoid version between cases and controls (cases: 6.0° ± 8.1° vs controls: 5.1° ± 7.8°, P = .22). Among individuals with subcritical bone loss, cases (3.8° ± 4.4°) were associated with significantly less mean retroversion compared with controls (7.1° ± 2.8°, P = .0085). Decreased retroversion (odds ratio 1.34; 95% confidence interval 1.05-1.72, P = 20) was a significant independent predictor of failure using univariable logistic regression. CONCLUSIONS While glenoid retroversion is not associated with failure after arthroscopic Bankart repair in individuals with no glenoid bone loss, decreased retroversion is associated with failure in individuals with subcritical bone loss. LEVEL OF EVIDENCE Level 3: Retrospective review.
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Affiliation(s)
- Ryan T Li
- Department of Orthopaedic Surgery, WakeMed Health and Hospitals, Raleigh, North Carolina, U.S.A
| | - Andrew Sheean
- Department of Orthopaedic Surgery, San Antonio Military Medical Center, San Antonio, Texas, U.S.A
| | - Kevin Wilson
- Orthopedic Surgery, Mount Nittany Health, State College, Pennsylvania, U.S.A
| | - Darren de Sa
- Division of Orthopaedics, Department of Surgery, McMaster University, Hamilton, Ontario, Canada, Centre for Evidence-Based Orthopaedics, Hamilton, Ontario, Canada
| | - Gillian Kane
- Department of Orthopaedic Sports Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, U.S.A
| | - Bryson Lesniak
- Department of Orthopaedic Sports Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, U.S.A
| | - Albert Lin
- Department of Orthopaedic Sports Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, U.S.A..
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28
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Gannon NP, Wise KL, Knudsen ML. Advanced Templating for Total Shoulder Arthroplasty. JBJS Rev 2021; 9:01874474-202103000-00004. [PMID: 33735155 DOI: 10.2106/jbjs.rvw.20.00089] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
» Longitudinal clinical and radiographic success of total shoulder arthroplasty (TSA) is critically dependent on optimal glenoid component position. » Historically, preoperative templating utilized radiographs with commercially produced overlay implant templates and a basic understanding of glenoid morphology. » The advent of 3-dimensional imaging and templating has achieved more accurate and precise pathologic glenoid interrogation and glenoid implant positioning than historical 2-dimensional imaging. » Advanced templating allows for the understanding of unique patient morphology, the recognition and anticipation of potential operative challenges, and the prediction of implant limitations, and it provides a method for preoperatively addressing abnormal glenoid morphology. » Synergistic software, implants, and instrumentation have emerged with the aim of improving the accuracy of glenoid component implantation. Additional studies are warranted to determine the ultimate efficacy and cost-effectiveness of these technologies, as well as the potential for improvements in TSA outcomes.
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Affiliation(s)
- Nicholas P Gannon
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota
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29
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Matache BA, Alnusif N, Chaoui J, Walch G, Athwal GS. Humeral head subluxation in Walch type B shoulders varies across imaging modalities. JSES Int 2021; 5:98-101. [PMID: 33554173 PMCID: PMC7846694 DOI: 10.1016/j.jseint.2020.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Background The Walch type B pattern of glenohumeral osteoarthritis is characterized by posterior humeral head subluxation (PHHS). At present, it is unknown whether the percentage of subluxation measured on axillary radiographs is consistent with measurements on 2-dimensional (2D) axial or 3-dimensional (3D) volumetric computed tomography (CT). The purpose of this study was to evaluate PHHS across imaging modalities (radiographs, 2D CT, and 3D CT). Methods A cohort of 30 patients with Walch type B shoulders underwent radiography and standardized CT scans. The cohort comprised 10 type B1, 10 type B2, and 10 type B3 glenoids. PHHS was measured using the scapulohumeral subluxation method on axillary radiographs and 2D CT. On 3D CT, PHHS was measured volumetrically. PHHS was statistically compared between imaging modalities, with P ≤ .05 considered significant. Results The mean PHHS value for the entire group was 69% ± 24% on radiographs, 65% ± 23% with 2D CT, and 74% ± 24% with 3D volumetric CT. PHHS as measured on complete axillary radiographs was not significantly different than that measured on 2D CT (P = .941). Additionally, PHHS on 3D volumetric CT was 9.5% greater than that on 2D CT (P < .001). There were no significant differences in PHHS between the type B1, B2, and B3 groups with 2D or 3D CT measurement techniques (P > .102). Conclusion Significant differences in PHHS were found between measurement techniques (P < .035). A 9.5% difference in PHHS between 2D and 3D CT can be mostly accounted for by the linear (2D) vs. volumetric (3D) measurement techniques (a linear 80% PHHS value is mathematically equivalent to a volumetric PHHS value of 89.6%). Surgeons should be aware that subluxation values and therefore thresholds vary across different imaging modalities and measurement techniques.
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Affiliation(s)
| | - Naser Alnusif
- Roth
- McFarlane Hand & Upper Limb Centre, St. Joseph's Healthcare London, London, ON, Canada
| | | | | | - George S Athwal
- Roth
- McFarlane Hand & Upper Limb Centre, St. Joseph's Healthcare London, London, ON, Canada
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30
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Flynn JN, Wijeratna M, Evans M, Lee S, Taylor DM, Hoy GA. Glenoid vault perforation in total shoulder arthroplasty: Do we need computer guidance? Shoulder Elbow 2021; 13:107-112. [PMID: 33717224 PMCID: PMC7905515 DOI: 10.1177/1758573219885062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 09/29/2019] [Accepted: 10/02/2019] [Indexed: 11/15/2022]
Abstract
The proliferation of computer 3D simulation and computer-generated guides is aimed at minimizing perforation of the glenoid vault by glenoid pegs in shoulder arthroplasty, based on assumptions that perforation leads to worse outcomes by component loosening and potential failure. We evaluated outcomes of glenoid peg perforation testing the assumption that perforation produces worse results. Eighty-three shoulders underwent shoulder arthroplasty with pegged hybrid fixation (bone-ingrowth flanged central glenoid peg and peripheral cemented pegs) without precision signal injector guides or use of 3D planning software. Outcomes were determined by American Shoulder and Elbow Score and Oxford Shoulder Score. Fine slice CT determined the presence of vault perforation and the extent of lucent lines at the prosthesis-bone interface and bony morphology of the vault perforation. Follow-up was 46.7 months (24-99). Seven shoulders (8%) demonstrated perforation of glenoid vault. Bony ingrowth and cortical overgrowth occurred despite perforation, with no clinically significant differences in clinical or radiological outcomes in shoulders with and without glenoid vault perforation. None of these patients underwent revision surgery. Despite not utilizing computer planning and/or guides, 92% of implants did not perforate the glenoid vault. However, glenoid vault perforation in our series produced excellent outcomes with no increased risk of revision as a result of glenoid vault perforation.
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Affiliation(s)
- Jennifer N Flynn
- Austin Hospital, Heidelberg, Australia,Melbourne Orthopaedic Group, Windsor, Australia,Jennifer N Flynn, 26 Erin St, Richmond 3121, Australia.
| | | | - Matthew Evans
- Melbourne Orthopaedic Group, Windsor, Australia,Department of Surgery, Monash University, Melbourne, Australia
| | - Steven Lee
- The Avenue Radiology, Melbourne, Australia
| | - David McD Taylor
- Emergency Medicine Research, Austin Hospital, Melbourne, Australia,Department of Medicine, University of Melbourne, Melbourne, Australia
| | - Gregory A Hoy
- Austin Hospital, Heidelberg, Australia,Melbourne Orthopaedic Group, Windsor, Australia,Department of Surgery, Monash University, Melbourne, Australia
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31
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Camenzind RS, Gossing L, Martin Becerra J, Ernstbrunner L, Serane-Fresnel J, Lafosse L. Restoration of the Posterior Glenoid in Recurrent Posterior Shoulder Instability Using an Arthroscopically Placed Iliac Crest Bone Graft: A Computed Tomography-Based Analysis. Orthop J Sports Med 2021; 9:2325967120976378. [PMID: 33553454 PMCID: PMC7844463 DOI: 10.1177/2325967120976378] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 08/04/2020] [Indexed: 01/25/2023] Open
Abstract
Background Posterior shoulder instability is uncommon, and its treatment is a challenging problem. An arthroscopically assisted technique for posterior iliac crest bone grafting (ICBG) has shown promising short- and long-term clinical results. Changes as shown on imaging scans after posterior ICBG for posterior shoulder instability have not been investigated in the recent literature. Purpose To evaluate changes on computed tomography (CT) after arthroscopically assisted posterior ICBG and to assess clinical outcomes. Study Design Case series; Level of evidence, 4. Methods Patients with preoperative CT scans and at least 2 postoperative CT scans with a minimum follow-up of 2 years were included in the evaluation. Of 49 initial patients, 17 (follow-up rate, 35%) met the inclusion criteria and were available for follow-up. We measured the glenoid version angle and the glenohumeral and scapulohumeral indices on the preoperative CT scans and compared them with measurements on the postoperative CT scans. Postoperatively, graft surface, resorption, and defect coverage were measured and compared with those at early follow-up (within 16 months) and final follow-up (mean ± SD, 6.6 ± 2.8 years). Results The mean preoperative glenoid version was -17° ± 13.5°, which was corrected to -9.9° ± 11.9° at final follow-up (P < .001). The humeral head was able to be recentered and reached normal values as indicated by the glenohumeral index (51.8% ± 6%; P = .042) and scapulohumeral index (59.6% ± 10.2%; P < .001) at final follow-up. Graft surface area decreased over the follow-up period, from 24% ± 9% of the glenoid surface at early follow-up to 17% ± 10% at final follow-up (P < .001). All clinical outcome scores had improved significantly. Progression of osteoarthritis was observed in 47% of the shoulders. Conclusion Arthroscopically assisted posterior ICBG restored reliable parameters as shown on CT scans, especially glenoid version and the posterior subluxation indices. Graft resorption was common and could be observed in all shoulders. Patient-reported clinical outcome scores were improved. Osteoarthritis progression in almost 50% of patients is concerning for the long-term success of this procedure.
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Affiliation(s)
- Roland S Camenzind
- Alps Surgery Institute, Clinique Générale d'Annecy, Annecy, France.,Department of Orthopaedic Surgery, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
| | - Louis Gossing
- Alps Surgery Institute, Clinique Générale d'Annecy, Annecy, France.,Department of Orthopaedic Surgery, Braine-l'Alleud-Waterloo Hospital, Centre Hospitalier Interrégional Edith Cavell (CHIREC), Braine-l'Alleud, Belgium
| | - Javier Martin Becerra
- Alps Surgery Institute, Clinique Générale d'Annecy, Annecy, France.,Ortomove, Centro Medico ABC, Mexico City, Mexico
| | - Lukas Ernstbrunner
- Department of Orthopaedic Surgery, University of Zurich, Balgrist University Hospital, Zurich, Switzerland
| | - Julien Serane-Fresnel
- Alps Surgery Institute, Clinique Générale d'Annecy, Annecy, France.,IECEM - Research Unit, Polyclinique Saint Côme, Compiègne, France
| | - Laurent Lafosse
- Alps Surgery Institute, Clinique Générale d'Annecy, Annecy, France
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32
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Alashkham A, Soames R. The glenoid and humeral head in shoulder osteoarthritis: A comprehensive review. Clin Anat 2020; 34:710-720. [PMID: 33191525 DOI: 10.1002/ca.23703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/14/2020] [Accepted: 11/11/2020] [Indexed: 01/03/2023]
Abstract
The key management of glenohumeral osteoarthritis is shoulder arthroplasty which aims to reduce pain and restore full shoulder function: it has increased in recent years. A detailed understanding of the anatomy of the glenoid and humeral head, as well as morphological changes of the glenoid in osteoarthritis, are important factors to consider when deciding on replacement components. This review begins with a brief introduction of the glenohumeral joint itself, and then considers the detailed anatomy of the glenoid fossa and humeral head, both of which are reported to have variable morphology. Several studies have been undertaken to assess various parameters, especially of the glenoid fossa including its shape, height, width, and articular surface area, version and inclination, in an attempt to define a standard classification that can be applied to surgical intervention. Nevertheless, no definitive consensus concerning the classification of these morphologies has been forthcoming, hence the need for this review. Following a consideration of these morphologies, the current state of knowledge regarding glenoid deformity in osteoarthritis, as well as its surgical management, is considered.
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Affiliation(s)
- Abduelmenem Alashkham
- Anatomy, School of Biomedical Sciences, University of Edinburgh, Edinburgh, UK.,Centre for Anatomy and Human Identification, University of Dundee, Dundee, UK.,Human Anatomy Department, Faculty of Medicine, University of Zawia, Zawia, Libya
| | - Roger Soames
- Centre for Anatomy and Human Identification, University of Dundee, Dundee, UK
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33
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Jacxsens M, Dayerizadeh N, Vandenbosch D, Van Tongel A, De Wilde L. Clinical and radiographic outcomes of an all-polyethylene fluted central peg glenoid component, implanted utilizing an off-label, uncemented technique, at a minimum 5-year follow-up. J Shoulder Elbow Surg 2020; 29:2292-2298. [PMID: 32499196 DOI: 10.1016/j.jse.2020.02.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/13/2020] [Accepted: 02/20/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND Glenoid component loosening remains an important concern in anatomic total shoulder arthroplasty. The aim of this study was to evaluate the clinical and radiographic results of a fully uncemented all-polyethylene fluted central peg bone-ingrowth glenoid component at a minimum 5-year follow-up. METHODS Thirty-five shoulders in 31 patients (mean age, 73 years) with a mean follow-up of 100 months were retrospectively evaluated at an early and mid-term time point for Constant score (CS). Computed tomography visualized glenoid component fixation at both time points. RESULTS Mean CS improved from 40 preoperatively to 66 postoperatively at latest follow-up (P < .001). A mean CS of 74 at early follow-up remained consistent with a mean CS of 66 at latest follow-up (P = .158), with only strength demonstrating a decrease over time (P < .001). An initial osseointegration rate of 81% at early follow-up decreased to 71% at latest follow-up with 74% of the shoulders demonstrating progressive radiolucent lines, resulting in a radiographic loosening rate of 31%. Of the 35 shoulders, 4 were revised (survival rate of 88%), of which 2 due to symptomatic aseptic loosening. CONCLUSIONS Uncemented fixation of an all-polyethylene central peg bone-ingrowth glenoid was associated with satisfactory clinical and radiographic scores, and an acceptable revision rate at mid- to long-term follow-up. Despite initial bony osseointegration in the majority of cases, radiographic loosening over time remains a concern, potentially jeopardizing long-lasting fixation of this type of glenoid component when implanted in an off-label uncemented fashion.
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Affiliation(s)
- Matthijs Jacxsens
- Department of Orthopaedics and Traumatology, Ghent University Hospital, Ghent, Belgium; Department of Orthopaedics and Traumatology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Nader Dayerizadeh
- Department of Orthopaedics and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Dominiek Vandenbosch
- Department of Rehabilitation Sciences and Physiotherapy, Ghent University Hospital, Ghent, Belgium
| | - Alexander Van Tongel
- Department of Orthopaedics and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Lieven De Wilde
- Department of Orthopaedics and Traumatology, Ghent University Hospital, Ghent, Belgium.
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34
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Sprowls GR, Wilson CD, Stewart W, Hammonds KA, Baruch NH, Ward RA, Robin BN. Intraoperative navigation and preoperative templating software are associated with increased glenoid baseplate screw length and use of augmented baseplates in reverse total shoulder arthroplasty. JSES Int 2020; 5:102-108. [PMID: 33554174 PMCID: PMC7846692 DOI: 10.1016/j.jseint.2020.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background Preoperative templating software and intraoperative navigation have the potential to impact baseplate augmentation utilization and increase screw length for baseplate fixation in reverse total shoulder arthroplasty (rTSA). We aimed to assess their impact on the (1) baseplate screw length, (2) number of screws used, and (3) frequency of augmented baseplate use in navigated rTSA. Methods We compared 51 patients who underwent navigated rTSA with 63 controls who underwent conventional rTSA at a single institution. Primary outcomes included the screw length, composite screw length, number of screws used, percentage of patients in whom 2 screws in total were used, and use of augmented baseplates. Results Navigation resulted in the use of significantly longer individual screws (36.7 mm vs. 30 mm, P < .0001), greater composite screw length (84 mm vs. 76 mm, P = .048), and fewer screws (2.5 ± 0.7 vs. 2.8 ± 1, P = .047), as well as an increased frequency of using 2 screws in total (35 of 51 patients [68.6%] vs. 32 of 63 controls [50.8%], P = .047). Preoperative templating resulted in more frequent augmented baseplate utilization (76.5% vs. 19.1%, P < .0001). Conclusion The difference in the screw length, number of screws used, and augmented baseplate use demonstrates the evolving role that computer navigation and preoperative templating play in surgical planning and the intraoperative technique for rTSA.
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Affiliation(s)
- Gregory R. Sprowls
- Department of Orthopaedic Surgery, Baylor Scott & White Health, Temple, TX, USA
- College of Medicine, Texas A&M University, Temple, TX, USA
- Corresponding author: Gregory R. Sprowls, MD, 3108 Mea Ct, Temple, TX 76502, USA.
| | - Charlie D. Wilson
- Department of Orthopaedic Surgery, Baylor Scott & White Health, Temple, TX, USA
- College of Medicine, Texas A&M University, Temple, TX, USA
| | - Wells Stewart
- Department of Orthopaedic Surgery, Baylor Scott & White Health, Temple, TX, USA
- College of Medicine, Texas A&M University, Temple, TX, USA
| | | | | | - Russell A. Ward
- Department of Orthopaedic Surgery, Baylor Scott & White Health, Temple, TX, USA
- College of Medicine, Texas A&M University, Temple, TX, USA
| | - Brett N. Robin
- Department of Orthopaedic Surgery, Baylor Scott & White Health, Temple, TX, USA
- College of Medicine, Texas A&M University, Temple, TX, USA
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35
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Qualitative and quantitative analysis of glenoid bone stock and glenoid version: inter-reader analysis and correlation with rotator cuff tendinopathy and atrophy in patients with shoulder osteoarthritis. Skeletal Radiol 2020; 49:985-993. [PMID: 31955231 DOI: 10.1007/s00256-020-03377-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE Glenoid bone stock and morphology and rotator cuff muscle quality and tendon integrity affect the outcome of total shoulder arthroplasty. We hypothesized that glenoid bone loss correlates with rotator cuff muscle fatty infiltration (FI), tendinopathy, and atrophy. DESIGN Forty-three 3D CT scans and MRIs of 43 patients (mean age 62 years; SD 13 years; range 22-77 years) referred for primary shoulder pain were evaluated. Measurements of glenoid bone stock, version, and posterior humeral subluxation index (HSI) were assessed on an axial CT image reconstructed in the true scapular plane. Measurements utilized the Friedman line to approximate the pre-pathologic surface. Glenoid morphology was assigned by modified Walch classification. Rotator cuff FI, atrophy, and tendon integrity were assessed on corresponding MRIs. RESULTS There was a very strong negative correlation between increasing glenoid version and HSI (r = - 0.908; p < 0.0001). There was a moderately negative correlation between anterior bone loss and HSI (r = - 0.562; p < 0.0001) and a moderately positive correlation between posterior bone loss and HSI (r = 0.555; p < 0.0001). Subscapularis muscle FI correlated moderately with increased anterior and central bone loss and increased humeral head medialization (r = 0.512, p = 0.0294; r = 0.479, p = 0.033; r = 0.494, p = 0.0294; respectively). Inter-observer reliability (intra-class correlation coefficient [ICC] and kappa) was good to excellent for all measurements and grading. CONCLUSION Glenoid anteversion and anterior and posterior bone loss are associated with varying HSI. Subscapularis muscle FI, not tendon integrity, correlates to anterior and central glenoid erosion. The study adds evidence that neither rotator cuff tendinopathy nor muscle atrophy exhibits a significant relationship to HSI.
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Siebert MJ, Chalian M, Sharifi A, Pezeshk P, Xi Y, Lawson P, Chhabra A. Correction to: Qualitative and quantitative analysis of glenoid bone stock and glenoid version: inter-reader analysis and correlation with rotator cuff tendinopathy and atrophy in patients with shoulder osteoarthritis. Skeletal Radiol 2020; 49:995-1003. [PMID: 32086541 DOI: 10.1007/s00256-020-03386-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Purpose Glenoid bone stock and morphology and rotator cuff muscle quality and tendon integrity affect the outcome of total shoulder arthroplasty. We hypothesized that glenoid bone loss correlates with rotator cuff muscle fatty infiltration (FI), tendinopathy, and atrophy.Design Forty-three 3-D CT scans and MRIs of 43 patients (mean age 62 years; SD 13 years; range 22-77 years) referred for primary shoulder pain were evaluated. Measurements of glenoid bone stock, version, and posterior humeral subluxation index (HSI) were assessed on an axial CT image reconstructed in the true scapular plane. Measurements utilized the Friedman line to approximate the pre-pathologic surface. Glenoid morphology was assigned by modified Walch classification. Rotator cuff FI, atrophy, and tendon integrity were assessed on corresponding MRIs.Results There was a very strong negative correlation between increasing glenoid version and HSI (r = - 0.908; p < 0.0001). There was a moderately negative correlation between anterior bone loss and HSI (r = - 0.562; p < 0.0001) and a moderately positive correlation between posterior bone loss and HSI (r = 0.555; p < 0.0001). Subscapularis muscle FI correlated moderately with increased anterior and central bone loss and increased humeral head medialization (r = 0.512, p = 0.0294; r = 0.479, p = 0.033; r = 0.494, p = 0.0294, respectively). Inter-observer reliability (intra-class correlation coefficient [ICC] and kappa) was good to excellent for all measurements and grading.Conclusion Glenoid anteversion and anterior and posterior bone loss are associated with varying HSI. Subscapularis muscle FI, not tendon integrity, correlates to anterior and central glenoid erosion. The study adds evidence that neither rotator cuff tendinopathy nor muscle atrophy exhibits a significant relationship to HSI.
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Affiliation(s)
| | - Majid Chalian
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA
| | | | - Parham Pezeshk
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Yin Xi
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Parker Lawson
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Avneesh Chhabra
- Radiology, UT Southwestern Medical Center, Dallas, TX, USA. .,Orthopedics, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX, 75390, USA. .,Radiology and Orthopedic Surgery, UT Southwestern Medical Center, Dallas, TX, USA. .,Johns Hopkins University, Baltimore, MD, USA. .,Walton Center of Neurosciences, Liverpool, UK.
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Kim H, Yoo CH, Park SB, Song HS. Difference in glenoid retroversion between two-dimensional axial computed tomography and three-dimensional reconstructed images. Clin Shoulder Elb 2020; 23:71-79. [PMID: 33330237 PMCID: PMC7714332 DOI: 10.5397/cise.2020.00122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 11/30/2022] Open
Abstract
Background The glenoid version of the shoulder joint correlates with the stability of the glenohumeral joint and the clinical results of total shoulder arthroplasty. We sought to analyze and compare the glenoid version measured by traditional axial two-dimensional (2D) computed tomography (CT) and three-dimensional (3D) reconstructed images at different levels. Methods A total of 30 cases, including 15 male and 15 female patients, who underwent 3D shoulder CT imaging was randomly selected and matched by sex consecutively at one hospital. The angular difference between the scapular body axis and 2D CT slice axis was measured. The glenoid version was assessed at three levels (midpoint, upper one-third, and center of the lower circle of the glenoid) using Friedman’s method in the axial plane with 2D CT images and at the same level of three different transverse planes using a 3D reconstructed image. Results The mean difference between the scapular body axis on the 3D reconstructed image and the 2D CT slice axis was 38.4°. At the level of the midpoint of the glenoid, the measurements were 1.7°±4.9° on the 2D CT images and −1.8°±4.1° in the 3D reconstructed image. At the level of the center of the lower circle, the measurements were 2.7°±5.2° on the 2D CT images and −0.5°±4.8° in the 3D reconstructed image. A statistically significant difference was found between the 2D CT and 3D reconstructed images at all three levels. Conclusions The glenoid version is measured differently between axial 2D CT and 3D reconstructed images at three levels. Use of 3D reconstructed imaging can provide a more accurate glenoid version profile relative to 2D CT. The glenoid version is measured differently at different levels.
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Affiliation(s)
- Hyungsuk Kim
- Department of Orthopedic Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Chang Hyun Yoo
- Department of Orthopedic Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Soo Bin Park
- Department of Orthopedic Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyun Seok Song
- Department of Orthopedic Surgery, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Abstract
Virtual Reality (VR) in orthopedic surgery has significantly increased in popularity in the areas of preoperative planning, intraoperative usage, and for education and training; however, its utilization lags behind other surgical disciplines and industries. The use of VR in orthopedics is largely focused on education and is currently endorsed by North American and European training committees. The use of VR in shoulder and elbow surgery has varying levels of evidence, from I to IV, and typically involves educational randomized controlled trials. To date, however, the terms and definitions surrounding VR technology used in the literature are often redundant, confusing, or outdated. The purpose of this review, therefore, was to characterize previous uses of VR in shoulder and elbow surgery in preoperative, intraoperative, and educational domains including trauma and elective surgery. Secondary objectives were to provide recommendations for updated terminology of immersive VR (iVR) as well as provide a framework for standardized reporting of research surrounding iVR in shoulder and elbow surgery.
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Affiliation(s)
- Ryan Lohre
- Department of Orthopaedics, University of British Columbia, Vancouver, BC, Canada
| | - Jon J P Warner
- The Harvard Shoulder Service, Massachusetts General Hospital, Brigham and Women's Hospital, Boston, MA, USA
| | - George S Athwal
- Roth McFarlane Hand and Upper Limb Center, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Danny P Goel
- Department of Orthopaedics, University of British Columbia, Vancouver, BC, Canada
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Abstract
Preoperative assessment of the glenoid in the setting of shoulder arthroplasty is critical to account for variations in glenoid morphology, wear, version, inclination, and glenohumeral subluxation. Three-dimensional computed tomography (3D CT) scan assessment of the morphology of glenoid erosion allows for a more accurate surgical decision-making process to correct deformity and restore the joint line. Newer technology has brought forth computer-assisted software for glenoid planning in shoulder arthroplasty and patient-specific instrumentation. There have been promising early findings, although further evaluation is needed to determine how this technology impacts implant survivorship, function, and patient-reported outcomes.
Cite this article: EFORT Open Rev 2020;5:126-137. DOI: 10.1302/2058-5241.5.190011
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Affiliation(s)
- Stephen Gates
- Department of Orthopaedic Surgery, Shoulder Service, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Brain Sager
- Department of Orthopaedic Surgery, Shoulder Service, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Michael Khazzam
- Department of Orthopaedic Surgery, Shoulder Service, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Abstract
AIMS Patient-specific instrumentation has been shown to increase a surgeon's precision and accuracy in placing the glenoid component in shoulder arthroplasty. There is, however, little available information about the use of patient-specific planning (PSP) tools for this operation. It is not known how these tools alter the decision-making patterns of shoulder surgeons. The aim of this study was to investigate whether PSP, when compared with the use of plain radiographs or select static CT images, influences the understanding of glenoid pathology and surgical planning. METHODS A case-based survey presented surgeons with a patient's history, physical examination, and, sequentially, radiographs, select static CT images, and PSP with a 3D imaging program. For each imaging modality, the surgeons were asked to identify the Walch classification of the glenoid and to propose the surgical treatment. The participating surgeons were grouped according to the annual volume of shoulder arthroplasties that they undertook, and responses were compared with the recommendations of two experts. RESULTS A total of 59 surgeons completed the survey. For all surgeons, the use of the PSP significantly increased agreement with the experts in glenoid classification (x2 = 8.54; p = 0.014) and surgical planning (x2 = 37.91; p < 0.001). The additional information provided by the PSP also showed a significantly higher impact on surgical decision-making for surgeons who undertake fewer than ten shoulder arthroplasties annually (p = 0.017). CONCLUSIONS The information provided by PSP has the greatest impact on the surgical decision-making of low volume surgeons (those who perform fewer than ten shoulder arthroplasties annually), and PSP brings all surgeons in to closer agreement with the recommendations of experts for glenoid classification and surgical planning. Cite this article: Bone Joint J 2020;102-B(3):365-370.
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Affiliation(s)
- Kyong S Min
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Henry M Fox
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Asheesh Bedi
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | | | - Jon J P Warner
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
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Das AK, Wright AC, Singh J, Monga P. Does posterior half-wedge augmented glenoid restore version and alignment in total shoulder arthroplasty for the B2 glenoid? J Clin Orthop Trauma 2020; 11:S275-S279. [PMID: 32189953 PMCID: PMC7067996 DOI: 10.1016/j.jcot.2020.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 10/25/2022] Open
Abstract
INTRODUCTION Walch type B2 has biconcave glenoid with posterior erosion, bone loss and humeral head subluxation. This leads to decreased glenohumeral contact area and increased contact pressure. During total shoulder arthroplasty(TSA), uncorrected retroversion causes eccentric loading and failure of glenoid component. It also leads to humeral head decentring with posterior rim loading, early glenoid wear and component loosening. This study aims to review anatomical restoration of glenoid version and humeral head centring in TSA with B2 glenoid using CT scans. METHODS This is a retrospective review of TSA for glenohumeral osteoarthritis with B2 Glenoid morphology. All polyethylene posterior wedge augmented glenoid component was used. All patients underwent pre and post surgery CT Scans. Glenoid version was calculated using neoglenoid line and medial scapular border as reference point. Post-operative humeral head centering was calculated using offset of centre of rotation of humeral head with plane of scapula on axial CT-Scan. RESULTS Study had 10 patients with 11 TSA between June 2017 and July 2018. Mean age was 59(45-80)years. Mean preoperative retroversion was 16(13-23)degrees. This was corrected to a mean of 0° retroversion postoperatively. 63% had good radiological correction (0-5° retroversion). Humeral head was well centered post-operatively with mean humeral scapula alignment offset of 2.1(0.8-4.5) mm posteriorly. All cases had well-centered humeral head postoperatively with offset less than 5 mm. CONCLUSIONS Total shoulder replacement in B2 glenoid is technically demanding. Our radiological results show favourable outcome in terms of correction of gelenoid retroversion and eliminating posterior instability using wedge glenoid component. LEVEL OF EVIDENCE IV.
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Javed S, Hadi S, Imam MA, Gerogiannis D, Foden P, Monga P. The Ellipse modification of the Friedman method for measuring glenoid version. Bone Joint J 2020; 102-B:232-238. [PMID: 32009429 DOI: 10.1302/0301-620x.102b2.bjj-2019-0726.r1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS Accurate measurement of the glenoid version is important in performing total shoulder arthroplasty (TSA). Our aim was to evaluate the Ellipse method, which involves formally defining the vertical mid-point of the glenoid prior to measuring the glenoid version and comparing it with the 'classic' Friedman method. METHODS This was a retrospective study which evaluated 100 CT scans for patients who underwent a primary TSA. The glenoid version was measured using the Friedman and Ellipse methods by two senior observers. Statistical analyses were performed using the paired t-test for significance and the Bland-Altman plot for agreement. RESULTS The mean glenoid version was -3.11° (-23.8° to 17.9°) using the Friedman method and -1.95° (-29.8° to 24.6°) using the Ellipse method (p = 0.002). In 16 patients the difference between methods was greater than 5°, which we considered to be clinically significant. There was poor agreement between methods with relatively large 95% limits of agreement. There was excellent inter-rater agreement between the observers for the Ellipse method and similarly, the intrarater agreement was excellent with a repeatability coefficient of 0.94. CONCLUSION We recommend the use of the Ellipse modification to define the mid glenoid point prior to measuring the glenoid version in patients undergoing TSA. Cite this article: Bone Joint J 2020;102-B(2):232-238.
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Affiliation(s)
- Saqib Javed
- Upper Limb Unit, Wrightington Hospital, Wigan, UK
| | - Saif Hadi
- Upper Limb Unit, Wrightington Hospital, Wigan, UK
| | | | | | - Philip Foden
- Statistics Department, University Hospital South Manchester, Manchester, UK
| | - Puneet Monga
- Upper Limb Unit, Wrightington Hospital, Wigan, UK
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Shukla DR, McLaughlin RJ, Lee J, Nguyen NTV, Sanchez-Sotelo J. Automated three-dimensional measurements of version, inclination, and subluxation. Shoulder Elbow 2020; 12:31-37. [PMID: 32010231 PMCID: PMC6974883 DOI: 10.1177/1758573218825480] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/03/2018] [Accepted: 12/15/2018] [Indexed: 01/28/2023]
Abstract
BACKGROUND Preoperative planning software has been developed to measure glenoid version, glenoid inclination, and humeral head subluxation on computed tomography (CT) for shoulder arthroplasty. However, most studies analyzing the effect of glenoid positioning on outcome were done prior to the introduction of planning software. Thus, measurements obtained from the software can only be extrapolated to predict failure provided they are similar to classic measurements. The purpose of this study was to compare measurements obtained using classic manual measuring techniques and measurements generated from automated image analysis software. METHODS Ninety-five two-dimensional computed tomography scans of shoulders with primary glenohumeral osteoarthritis were measured for version according to Friedman method, inclination according to Maurer method, and subluxation according to Walch method. DICOM files were loaded into an image analysis software (Blueprint, Wright Medical) and the output was compared with values obtained manually using a paired sample t-test. RESULTS Average manual measurements included 13.8° version, 13.2° inclination, and 56.2% subluxation. Average image analysis software values included 17.4° version (3.5° difference, p < 0.0001), 9.2° inclination (3.9° difference, p < 0.001), and 74.2% for subluxation (18% difference, p < 0.0001). CONCLUSIONS Glenoid version and inclination values from the software and manual measurement on two-dimensional computed tomography were relatively similar, within approximately 4°. However, subluxation measurements differed by approximately 20%.
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Affiliation(s)
| | | | | | | | - Joaquin Sanchez-Sotelo
- Joaquin Sanchez-Sotelo, Department of Orthopedic Surgery, Mayo Clinic, 200 First St. SW, Rochester, MN 55905, USA.
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Pyrocarbon interposition shoulder arthroplasty in young arthritic patients: a prospective observational study. J Shoulder Elbow Surg 2020; 29:e1-e10. [PMID: 31451348 DOI: 10.1016/j.jse.2019.05.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 05/14/2019] [Accepted: 05/21/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND We evaluated survival and midterm results of pyrocarbon interposition shoulder arthroplasty (PISA) in arthritic patients younger than 65 years. METHODS Fifty-eight PISAs (InSpyre; Tornier-Wright, Bloomington, MN, USA), implanted in 56 patients between 2010 and 2015, were prospectively observed. The mean age at surgery was 52 ± 13 years. The cause was primary osteoarthritis (18), fracture sequelae (16), post-instability arthritis (15), aseptic necrosis (3), inflammatory disease (2), and failed hemiarthroplasty (4); 34 shoulders (61%) had previously undergone surgery. Glenoid erosion was assessed in 4 grades according to the Sperling classification. Humeral erosion was also assessed in 4 grades. Multivariate analysis was used to determine predisposing risk factors for both humeral and glenoid erosion. RESULTS At a mean follow-up of 47 ± 15 months, survival rate was 90%. Six patients (10%) required conversion to reverse total shoulder prosthesis for painful glenoid erosion (n = 2) and humeral erosion with greater tuberosity stress fractures (n = 4). The mean Constant score and subjective shoulder value significantly increased from 36 ± 14 points to 70 ± 15 points and 32% ± 14% to 75% ± 19%, respectively (P < .001). Humeral medialization was observed in 78% of the cases with increased pain score. Uncorrected anteroposterior implant subluxation (12 cases) was associated with lower Constant score (50 points vs. 72 points; P = .02) and lower subjective shoulder value (53% vs. 78%; P = .002). On multivariate analysis, no risk factors for glenoid or humeral erosion were found. CONCLUSION At midterm follow-up, PISA does not protect from progressive glenoid erosion and can lead to greater tuberosity erosion and stress fractures. Longer follow-up is required to see whether PISA survival will be superior to that of hemiarthroplasty.
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Holt AM, Throckmorton TW. Reverse Shoulder Arthroplasty for B2 Glenoid Deformity. J Shoulder Elb Arthroplast 2019; 3:2471549219897661. [PMID: 34497958 PMCID: PMC8282141 DOI: 10.1177/2471549219897661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 09/27/2019] [Accepted: 12/08/2019] [Indexed: 11/23/2022] Open
Abstract
In shoulder osteoarthritis, the B2 glenoid presents challenges in treatment
because of the excessive retroversion and posterior deficiency of the glenoid.
Correction of retroversion and maintenance of a stable joint line with
well-fixed implants are essential for the successful treatment of this deformity
with arthroplasty. Reverse shoulder arthroplasty offers several key advantages
in achieving this goal, including favorable biomechanics, a well-fixed
baseplate, and proven success in other applications. Techniques such as
eccentric reaming, bone grafting, and baseplate augmentation allow surgeons to
tailor treatment to the patient’s altered anatomy. Eccentric reaming is favored
for correction of small defects or mild version anomalies. Current trends favor
bone grafting for larger corrections, though augmented components have shown
early promise with the potential for expanded use. With overall promising
results reported in the literature, reverse shoulder arthroplasty is a useful
tool for treating older patients with B2 glenoid deformities.
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Affiliation(s)
- Andrew M Holt
- Campbell Clinic, Department of Orthopaedic Surgery and Biomedical Engineering, University of Tennessee, Memphis, Tennesse
| | - Thomas W Throckmorton
- Campbell Clinic, Department of Orthopaedic Surgery and Biomedical Engineering, University of Tennessee, Memphis, Tennesse
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Nashikkar PS, Scholes CJ, Haber MD. Computer navigation re-creates planned glenoid placement and reduces correction variability in total shoulder arthroplasty: an in vivo case-control study. J Shoulder Elbow Surg 2019; 28:e398-e409. [PMID: 31353300 DOI: 10.1016/j.jse.2019.04.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 04/03/2019] [Accepted: 04/15/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND Accurate glenoid component placement is important to prevent glenoid component failure in total shoulder arthroplasty (TSA). Navigation may reduce the variability of glenoid component version and inclination; therefore, the aims of this study were to determine, in patients undergoing TSA, whether computer navigation improved the ability to achieve neutral postoperative version and inclination, as well as achieve the individualized preoperative plan. METHODS Patients undergoing TSA using navigation (computer-assisted surgery [CAS], n = 33) or the conventional technique (n = 27) from January 2014 to July 2017 were recruited and compared. Preoperative and postoperative version and inclination, as well as postoperative inferior overhang, were measured using computed tomography scans. RESULTS The CAS group had more than twice as many augmented glenoid components as the conventional group (45.5% vs. 19.2%). CAS significantly reduced the between-patient variability in postoperative version and led to a greater proportion of components positioned in "neutral" alignment for both inclination and version (P < .015). The incidence of neutral inclination or version postoperatively was significantly higher in the CAS group, and the glenoid was implanted within 5° of the surgical plan in more than 70% of cases, with more than 40% displaying no detectable difference. CONCLUSION An integrated system of 3-dimensional surgical planning, augmented glenoid components, and intraoperative navigation may reduce the risk of glenoid placement outside of a neutral position in patients undergoing TSA compared with conventional methods. This study demonstrated the capacity for CAS to replicate the surgical plan in a majority of cases.
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Affiliation(s)
| | | | - Mark D Haber
- Southern Orthopaedics, Wollongong, NSW, Australia.
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Alentorn-Geli E, Wanderman NR, Assenmacher AT, Sperling JW, Cofield RH, Sánchez-Sotelo J. Anatomic total shoulder arthroplasty with posterior capsular plication versus reverse shoulder arthroplasty in patients with biconcave glenoids: A matched cohort study. J Orthop Surg (Hong Kong) 2019; 26:2309499018768570. [PMID: 29661111 DOI: 10.1177/2309499018768570] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
PURPOSE To compare the outcomes of total shoulder arthroplasty (TSA) with posterior capsule plication (PCP) and reverse shoulder arthroplasty (RSA) in patients with primary osteoarthritis, posterior subluxation, and bone loss (Walch B2). PATIENTS AND METHODS All shoulders undergoing anatomic TSA with PCP were retrospectively identified (group 1, G1) and compared to shoulders undergoing RSA (group 2, G2) for Walch B2 osteoarthritis. There were 15 patients in G1 (mean (SD) age and follow-up of 70.5 (7.5) years and 42.8 (18.4) months, respectively) and 16 patients in G2 (mean (SD) age and follow-up of 72.6 (5.4) years and 35.1 (14.2) months, respectively). RESULTS Both groups had substantial improvements in pain and function. In G1, results were excellent in 80% and satisfactory in 20%, compared to 81% and 6% in G2, respectively ( p = 0.2). The mean (SD) American Shoulder and Elbow Surgeons score was 91.2 (6.7) and 80.3 (14.3) in G1 and G2, respectively ( p = 0.08). The mean Simple Shoulder Test score was 10.6 in G1 and 8.5 in G2 ( p = 0.01). There were no reoperations in either group, but G1 had seven postoperative complications. CONCLUSIONS The outcomes of TSA with PCP are comparable to RSA in patients with osteoarthritis and biconcave glenoids. However, TSA leads to more complications while RSA leads to lower functional outcomes.
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Affiliation(s)
| | - Nathan R Wanderman
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | | | - John W Sperling
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Robert H Cofield
- Department of Orthopaedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
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Collin P, Hervé A, Walch G, Boileau P, Muniandy M, Chelli M. Mid-term results of reverse shoulder arthroplasty for glenohumeral osteoarthritis with posterior glenoid deficiency and humeral subluxation. J Shoulder Elbow Surg 2019; 28:2023-2030. [PMID: 31405717 DOI: 10.1016/j.jse.2019.03.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/18/2019] [Accepted: 03/19/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND Results of anatomic shoulder arthroplasty for glenohumeral osteoarthritis with severe glenoid retroversion are unpredictable with a high rate of glenoid loosening. Reverse shoulder arthroplasty (RSA) has been suggested as an alternative, with good early results. We sought to confirm this at longer follow-up (minimum 5 years). The study hypothesis was that early results would endure over time. METHODS We retrospectively reviewed all RSAs performed in 7 centers from 1998 to 2010. The inclusion criteria were primary glenohumeral osteoarthritis with B1, B2, B3, or C glenoid. Forty-nine shoulders in 45 patients fulfilled the criteria. Bone grafting was performed in 16 cases. Clinical outcomes were evaluated with the Constant score (CS) and shoulder range of motion. RESULTS The mean total CS increased from 30 preoperatively to 68 points (P < .001) with significant improvements in all the subsections of the CS and range of motion. Scapular notching was observed in 20 shoulders (43%), grade 1 in 5 (11%), grade 2 in 7 (15%), grade 3 in 5 (11%), and grade 4 in 3 (6%). The glenoid bone graft healed in all the shoulders. Partial inferior lysis of the bone graft was present in 8 cases (50%). Scapular notching and glenoid bone graft resorption had no influence on the CS (P = .147 and P = .798). CONCLUSION RSA for the treatment of primary glenohumeral osteoarthritis in patients with posterior glenoid deficiency and humeral subluxation without rotator cuff insufficiency resulted in excellent clinical outcomes at a minimum of 5 years of follow-up.
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Affiliation(s)
- Philippe Collin
- Institut Locomoteur de l'Ouest, CHP St Grégoire, St Grégoire, France.
| | - Anthony Hervé
- Service de Chirurgie Orthopédique et Traumatologique CHU Pontchaillou Rennes, Rennes, France
| | - Gilles Walch
- Service de Chirurgie Orthopédique, Clinique Santy, Lyon, France
| | - Pascal Boileau
- Service de Chirurgie Orthopédique et Traumatologique, CHU Hôpital Pasteur 2, Nice, France
| | | | - Mickael Chelli
- Service de Chirurgie Orthopédique et Traumatologique, CHU Hôpital Pasteur 2, Nice, France
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Abstract
The Walch B2 glenoid is characterized by a biconcave glenoid deformity, acquired glenoid retroversion, and posterior humeral head subluxation. Surgical reconstruction of the B2 glenoid remains a challenge. Surgical management options include arthroscopic debridement, hemiarthroplasty, anatomic total shoulder arthroplasty with eccentric reaming, bone grafting or augmented glenoid implants, and reverse total shoulder arthroplasty. Multiple factors dictate the optimal surgical management strategy.. This article describes each of these techniques and presents the current available literature in an effort to guide evidence-based decisions in the surgical management of the B2 glenoid deformity.
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Affiliation(s)
- Siddhant K Mehta
- Shoulder and Elbow Surgery, Department of Orthopaedic Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8233, Saint Louis, MO 63110, USA
| | - Alexander W Aleem
- Shoulder and Elbow Surgery, Department of Orthopaedic Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8233, Saint Louis, MO 63110, USA.
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Salhi A, Burdin V, Boutillon A, Brochard S, Mutsvangwa T, Borotikar B. Statistical Shape Modeling Approach to Predict Missing Scapular Bone. Ann Biomed Eng 2019; 48:367-379. [DOI: 10.1007/s10439-019-02354-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 08/31/2019] [Indexed: 11/25/2022]
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