Jóni Nunes1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, Renato Andrade2,3,5, Clara Azevedo1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, Nuno V Ferreira4, Nuno Oliveira1,4, Emílio Calvo12, João Espregueira-Mendes2,3,9,13, Nuno Sevivas4,9,14,15. 1. Hospital de Braga, Braga, Portugal. 2. Clínica Espregueira - FIFA Medical Centre of Excellence, Porto, Portugal. 3. Dom Henrique Research Centre, Porto, Portugal. 4. School of Medicine, University of Minho, Braga, Portugal. 5. Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sports, University of Porto, Porto, Portugal. 6. Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal. 7. Hospital dos SAMS de Lisboa, Lisbon, Portugal. 8. Clínica GIGA Saúde, Lisbon, Portugal. 9. School of Medicine and ICVS/3B's PT Government Associate Laboratory, University of Minho, Braga, Portugal. 10. Trofa Saúde Group - Braga, Portugal. 11. Hospital Santa Maria Maior, Barcelos, Portugal. 12. Fundacion Jimenez Diaz, Universidad Autonoma de Madrid, Madrid, Spain. 13. 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Barco, Guimarães, Portugal. 14. Trofa Saúde Group - Hospital Central, Vila do Conde, Portugal. 15. Centro Hospitalar Médio Ave, Famalicão, Portugal.
Abstract
BACKGROUND: Lateralized reverse shoulder arthroplasty (RSA) has emerged as an attempt to improve on some of the drawbacks of conventional RSA, such as glenoid notching and decrease in ROM. Although this new design is being used in clinical practice, the evidence is mostly limited to case series and has not been systematically reviewed. QUESTIONS/PURPOSES: (1) How much did patient-reported outcome measures (PROMs) and ROM improve among patients who receive a lateralized RSA implant? (2) What proportion of shoulders experience complications, revision surgery, or scapular notching? METHODS: The PubMed and EMBASE databases were searched from database inception to January 31, 2020. We included clinical studies that reported the PROMs and/or ROM of patients with insufficient rotator cuffs undergoing RSA with a lateralized implant. All other types of studies and those including patients with fractures, instability or escape, infection, rheumatologic disease, neurologic disease, or revision surgeries as an indication for RSA were excluded. PROMs and ROM were collected and are reported as mean values and ranges. Complications, revision surgery, and scapular notching are presented as proportions. The percentage of the mean change relative to the minimum clinically important difference (MCID) was calculated using the anchor-based value for each outcome. The Methodological Index for Non-randomized Studies (MINORS) was used to assess study quality. The initial search yielded 678 studies; 61 full-text articles were analyzed according to our eligibility criteria. After a detailed analysis, we included nine studies that evaluated 1670 patients (68% of whom [1130] were women) with a mean age of 71.8 ± 0.6 years. The mean follow-up period was 41.1 ± 5.6 months. The mean MINORS score was 12 ± 4. RESULTS: Active ROM improved for forward flexion (mean change 47° to 82°; MCID 12°), abduction (mean change 43° to 80°; MCID 7°), external rotation (mean change 8° to 39°; MCID 3°), and internal rotation (mean change -2 to 1 points). PROM scores also improved, including the American Shoulder and Elbow Surgeons score (mean change 20 to 50; MCID 20.9 points), Constant score (mean change 28 to 40; MCID 5.7 points), Simple Shoulder Test score (mean change 3 to 7; MCID 2.4 points), and VAS score (mean change -1.8 to -4.9; MCID -1.6 points). The proportion of shoulders with complications ranged from 0% (0 of 44) to 21% (30 of 140), and the proportion of shoulders with scapular notching ranged from 0% (0 of 76) to 29% (41 of 140). The proportion of patients undergoing revision ranged from 0% (0 of 44) to 13% (10 of 76) at short-term follow-up. CONCLUSION: Lateralized RSA is a reasonable alternative to medialized implants for patients with rotator cuff insufficiency because it might reduce the likelihood of scapular notching without apparently compromising PROMs or ROM. More studies are required to determine whether there is a direct correlation between the amount of lateralization and PROMs or ROM.
BACKGROUND: Lateralized reverse shoulder arthroplasty (RSA) has emerged as an attempt to improve on some of the drawbacks of conventional RSA, such as glenoid notching and decrease in ROM. Although this new design is being used in clinical practice, the evidence is mostly limited to case series and has not been systematically reviewed. QUESTIONS/PURPOSES: (1) How much did patient-reported outcome measures (PROMs) and ROM improve among patients who receive a lateralized RSA implant? (2) What proportion of shoulders experience complications, revision surgery, or scapular notching? METHODS: The PubMed and EMBASE databases were searched from database inception to January 31, 2020. We included clinical studies that reported the PROMs and/or ROM of patients with insufficient rotator cuffs undergoing RSA with a lateralized implant. All other types of studies and those including patients with fractures, instability or escape, infection, rheumatologic disease, neurologic disease, or revision surgeries as an indication for RSA were excluded. PROMs and ROM were collected and are reported as mean values and ranges. Complications, revision surgery, and scapular notching are presented as proportions. The percentage of the mean change relative to the minimum clinically important difference (MCID) was calculated using the anchor-based value for each outcome. The Methodological Index for Non-randomized Studies (MINORS) was used to assess study quality. The initial search yielded 678 studies; 61 full-text articles were analyzed according to our eligibility criteria. After a detailed analysis, we included nine studies that evaluated 1670 patients (68% of whom [1130] were women) with a mean age of 71.8 ± 0.6 years. The mean follow-up period was 41.1 ± 5.6 months. The mean MINORS score was 12 ± 4. RESULTS: Active ROM improved for forward flexion (mean change 47° to 82°; MCID 12°), abduction (mean change 43° to 80°; MCID 7°), external rotation (mean change 8° to 39°; MCID 3°), and internal rotation (mean change -2 to 1 points). PROM scores also improved, including the American Shoulder and Elbow Surgeons score (mean change 20 to 50; MCID 20.9 points), Constant score (mean change 28 to 40; MCID 5.7 points), Simple Shoulder Test score (mean change 3 to 7; MCID 2.4 points), and VAS score (mean change -1.8 to -4.9; MCID -1.6 points). The proportion of shoulders with complications ranged from 0% (0 of 44) to 21% (30 of 140), and the proportion of shoulders with scapular notching ranged from 0% (0 of 76) to 29% (41 of 140). The proportion of patients undergoing revision ranged from 0% (0 of 44) to 13% (10 of 76) at short-term follow-up. CONCLUSION: Lateralized RSA is a reasonable alternative to medialized implants for patients with rotator cuff insufficiency because it might reduce the likelihood of scapular notching without apparently compromising PROMs or ROM. More studies are required to determine whether there is a direct correlation between the amount of lateralization and PROMs or ROM.
Authors: Robert U Hartzler; Brandon M Steen; Michael M Hussey; Michael C Cusick; Benjamin J Cottrell; Rachel E Clark; Mark A Frankle Journal: J Shoulder Elbow Surg Date: 2015-07-11 Impact factor: 3.019
Authors: Jason O Holcomb; Daniel J Hebert; Mark A Mighell; Page E Dunning; Derek R Pupello; Michele D Pliner; Mark A Frankle Journal: J Shoulder Elbow Surg Date: 2010-04-02 Impact factor: 3.019
Authors: Richard J Friedman; Emilie V Cheung; Pierre-Henri Flurin; Thomas Wright; Ryan W Simovitch; Charlotte Bolch; Christopher P Roche; Joseph D Zuckerman Journal: Clin Orthop Relat Res Date: 2018-06 Impact factor: 4.176