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20240917234104.0 |
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cr uuu---uuuuu |
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240916s2024 xx |||||o 00| ||eng c |
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|a 10.1016/j.jseint.2024.06.003
|2 doi
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|a pubmed24n1536.xml
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|a (NLM)39280143
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Bauer, Stefan
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Optimizing stability and motion in reverse shoulder arthroplasty with a 135° neck-shaft-angle
|b a computer model study of standard versus retentive humeral inserts
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 17.09.2024
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|a published: Electronic-eCollection
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|a Citation Status PubMed-not-MEDLINE
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|a © 2024 The Authors.
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|a Background: There has been a trend to shift from a 155° and 145° neck-shaft-angle (NSA) to a more "anatomical" reverse shoulder arthroplasty with less distalization and a 135° NSA. Multiple studies have shown that a 135° NSA is beneficial for motion. There are some concerns about primary implant stability with a 135° NSA. When instability is detected, increasing the tension with thicker inlays or changing the NSA to 145° are possible solutions. A retentive 135° (Ret135) inlay may be an alternative to avoiding increased distalization; however, retentive liners are widely regarded as salvage options reducing range of motion (ROM) and avoided by most surgeons. The hypothesis of this study was that a retentive 135° insert of the tested implant system may not have drawbacks for impingement-free ROM compared to a standard 145° insert (Sta145)
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|a Methods: In this computer model study, 22 computed tomographic scans (11 males/11 females) were used to create models with a constant humeral stem (Perform/Stryker) and +3 mm lateralized baseplate +36 mm glenosphere for females and +6 mm lateralized baseplate +39 mm glenosphere for males using Blueprint software (Imascap, Brest, France). A Ret135, standard 135° (Sta135), and Sta145 (+10°) insert were compared for adduction (ADD), extension (EXT), external rotation (ER), and internal rotation (IR) all with the arm at the side as well as for combined IR (CIR = EXT + IR) and combined notching relevant (CNR) ROM (EXT + ER + IR + ADD)
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|a Results: Sta135 showed significantly better ROM for ER, IR, ADD, EXT, CNR ROM, and CIR compared to Ret135 (P < .05) and significantly better EXT and ADD compared to Sta145 (P < .0001). Comparison of Ret135 and Sta145 showed equivalent ROM performance, which was slightly better but nonsignificant for ADD (P = .16), EXT (P = .31), CNR ROM (P = .7), and CIR (P = .54) in favor of Ret135. Isolated IR (P = .39) and ER (P = .32) were slightly better but nonsignificant in favor of a Sta145
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|a Conclusion: For this implant system tested in a computer model, a 135° standard liner offers the best ROM. A 135° retentive liner maintains at least equivalent CIR and motion to prevent notching compared to a standard 145° liner. 135° retentive liners are more than salvage options and may help to prevent distalization and overtensioning by increased liner thickness
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|a Journal Article
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4 |
|a Impingement
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|a Neck shaft angle
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|a Notching
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4 |
|a Range of motion
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| 650 |
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4 |
|a Retentive liner
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| 650 |
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4 |
|a Reverse shoulder arthroplasty
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| 700 |
1 |
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|a Blakeney, William G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lannes, Xavier
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Allan W
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shao, Wei
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t JSES international
|d 2020
|g 8(2024), 5 vom: 28. Sept., Seite 1087-1094
|w (DE-627)NLM307818438
|x 2666-6383
|7 nnns
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| 773 |
1 |
8 |
|g volume:8
|g year:2024
|g number:5
|g day:28
|g month:09
|g pages:1087-1094
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| 856 |
4 |
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|u http://dx.doi.org/10.1016/j.jseint.2024.06.003
|3 Volltext
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