dc.contributor.author | Katthagen, J. Christoph | |
dc.contributor.author | Nolte, Philip-C. | |
dc.contributor.author | Moatshe, Gilbert | |
dc.contributor.author | Dornan, Grant J. | |
dc.contributor.author | Millett, Peter J. | |
dc.date.accessioned | 2022-03-22T21:31:47Z | |
dc.date.available | 2022-03-22T21:31:47Z | |
dc.date.created | 2021-12-09T13:53:00Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Arthroscopy, Sports Medicine, and Rehabilitation. 2021, 3(3), Side e799-e805. | en_US |
dc.identifier.issn | 2666-061X | |
dc.identifier.uri | https://hdl.handle.net/11250/2986921 | |
dc.description | This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). | en_US |
dc.description.abstract | Objectives: To develop a mathematical model for the preoperative planning of arthroscopic lateral acromioplasty (ALA) and to evaluate the role of radiographic parameters with regards to the critical shoulder angle (CSA).
Methods: Anteroposterior (AP) radiographs of patients who underwent rotator cuff surgery were screened to identify true AP radiographs. Radiographs were assessed for (1) native CSA, (2) CSA after simulated resection of a spur if present, (3) amount of ALA necessary to achieve a CSA of 34°, (4) CSA after 5-mm ALA, (5) lateral acromion angle, (6) acromion index, and (7) sclerosis of the greater tuberosity.
Results: A total of 1191 radiographs were screened. Of the 124 patients included, the native CSA was large (≥35°) in 56 patients (45%). In 30 patients (24%), a subacromial spur was detected and resection reduced the CSA by a median of 2°. Spur resection alone reduced the CSA to ≤34° in 19 patients (15.3%). Mean amount of ALA to achieve a CSA of 34° was 3.9 ± 1.8 mm, and this value strongly correlated with the CSA before ALA (R = 0.88, P < .001). The linear regression model to determine the amount of ALA to achieve a CSA of 34° was as follows: The multiple R2 for this model was 0.777. Mean reduction of CSA by 5-mm ALA was 3.8 ± 0.8° and 75% of large CSAs were reduced to a CSA of 30-34°. The acromion index had no significant independent influence on the model (P = .427), whereas lateral acromion angle was an independently significant predictor of required ALA to achieve a CSA of 34° (P = .019). Sclerosis of the greater tuberosity was significantly associated with a CSA of 35° or greater (P = .003).
Conclusions: The amount of ALA needed to reduce a large CSA to 34° correlates with the CSA before ALA and can preoperatively be planned with the use of a simple equation.
Level of Evidence: Level III; cross-sectional design; epidemiology study. | en_US |
dc.language.iso | eng | en_US |
dc.subject | ALA | en_US |
dc.subject | arthroscopic lateral acromioplasty | en_US |
dc.subject | arthroscopy | en_US |
dc.subject | critical shoulder angle | en_US |
dc.subject | CSA | en_US |
dc.subject | radiography | en_US |
dc.subject | sclerosis | en_US |
dc.title | Influence of radiographic parameters on reduction of the critical shoulder angle with arthroscopic lateral acromioplasty: A mathematical model | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | © 2021 Published by Elsevier on behalf of the Arthroscopy Association of North America | en_US |
dc.source.pagenumber | e799-e805 | en_US |
dc.source.volume | 3 | en_US |
dc.source.journal | Arthroscopy, Sports Medicine, and Rehabilitation | en_US |
dc.source.issue | 3 | en_US |
dc.identifier.doi | 10.1016/j.asmr.2021.01.021 | |
dc.identifier.cristin | 1966690 | |
dc.description.localcode | Institutt for idrettsmedisinske fag / Department of Sports Medicine | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |