Serial Changes in 3-Dimensional Supraspinatus Muscle Volume After Rotator Cuff Repair

Chung, Seok Won; Oh, Kyung-Soo; Moon, Sung Gyu; Kim, Na Ra; Lee, Ji Whan; Shim, Eungjune; Park, Sehyung; Kim, Young‐Jun

doi:10.1177/0363546517706699

Cited by 21 publications

(35 citation statements)

References 38 publications

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“…To our knowledge, this is the first quantitative longitudinal 3D RC muscle segmentation analysis after successful and failed arthroscopic RC repair. Even Chung and colleagues, 1 who reported 3D muscle volume measurements, did not assess the whole supraspinatus muscle, only 1 or 2 cm–thick muscle volume slices, and provided no fat fraction analysis. Their data, which indicated that the muscle area and volume can increase after successful repair, could have been caused by lateralization of the muscle volume by successful repair.…”

Section: Discussionmentioning

confidence: 99%

“…Despite our prospective study design, there remain potential limitations. We did not perform immediate postoperative baseline MRI as suggested by Chung et al 1 Such postoperative baseline MRI seems to be useful for 2-dimensional muscle area analysis (ie, Goutallier, cross-sectional muscle area, Tangent sign), as the lateralization of the myotendinous unit through repair influences these measurements, 13,16,29 but it should influence neither 3D volume analysis nor intramuscular fat fraction. We did not further analyze the potential effect of age and sex on RC muscle volume, but we tried to avoid this potential bias by including these factors as matching criteria.…”

Section: Discussionmentioning

confidence: 99%

“…Quantitative data comparing the degenerative muscle changes after successful or failed RC repair in humans are scarce, and semiquantitative data are controversial: There are some authors who report irreversible muscle degeneration, 10,21,24 while others report recovery from atrophy 1,9 or even fatty infiltration. 13,32…”

mentioning

confidence: 99%

“…7,17,24 This is mainly related to technical limitations of the currently available magnetic resonance imaging (MRI) hardware and software: clinically available MRI is often unable to cover the entire RC muscles from medial to lateral or quantify the muscular fat content. 1,17,23 Therefore, muscle atrophy is currently either graded with the tangent sign 33 or analyzed on a single cross-sectional image, 13 which has been proven to be less valid than a 3-dimensional (3D) analysis. 1,31 Fatty infiltration is mostly graded by MRI adaptations of the classification of Goutallier, 6,11 which is influenced by the retraction of the myotendinous unit 23 and has not demonstrated better-than-moderate interreader reliability.…”

mentioning

confidence: 99%

“…1,17,23 Therefore, muscle atrophy is currently either graded with the tangent sign 33 or analyzed on a single cross-sectional image, 13 which has been proven to be less valid than a 3-dimensional (3D) analysis. 1,31 Fatty infiltration is mostly graded by MRI adaptations of the classification of Goutallier, 6,11 which is influenced by the retraction of the myotendinous unit 23 and has not demonstrated better-than-moderate interreader reliability. 6,15 If nonoperative management fails, arthroscopic RC repair is the gold standard for the treatment of symptomatic full-thickness RC tears.…”

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confidence: 99%

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Changes of Supraspinatus Muscle Volume and Fat Fraction After Successful or Failed Arthroscopic Rotator Cuff Repair

et al. 2019

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Background: Muscle atrophy and fatty infiltration are limiting factors for successful rotator cuff (RC) repair. Quantitative data regarding these hallmarks of degenerative muscle changes after RC repair in humans are scarce. By utilizing a new application of the 6-point Dixon magnetic resonance imaging technology, 3-dimensional volume and fat fraction analysis of the whole RC muscle have become possible. Purpose: Quantitative analysis of atrophy and fatty infiltration of the supraspinatus muscle after healed and failed RC tendon-to-bone repair. Study Design: Cohort study; Level of evidence, 3. Methods: Muscle volume and fat fraction were measured preoperatively and at 3 and 12 months postoperatively in 19 failed and 21 healed arthroscopic supraspinatus tendon repairs, with full muscle volume segmentation and magnetic resonance Dixon sequences. Results: In both groups, the muscle volume initially decreased 3 months after RC repair by –3% in intact ( P = .140) and –10% in failed repair ( P = .004) but recovered between 3 and 12 months to 103% ( P = .274) in intact and 92% ( P = .040) in failed repairs when compared with the preoperative volume (difference of change between groups, preoperative to 12 month: P = .013). The supraspinatus muscle’s fat fraction did not significantly change after successful repair (6.5% preoperative, 6.6% after 3 months, and 6.7% after 12 months; all nonsignificant). There was, however, a significant increase from 7.8% to 10.8% at 3 months ( P = .014) and 11.4% at 12 months ( P = .020) after failed repair (difference between groups at 3- and 12-month follow-up: P = .018 and P = .001, respectively). Conclusion: After successful arthroscopic repair, RC tendon tear–induced fatty infiltration can be almost stopped, and muscle atrophy can even be slightly reversed. In case of a failed repair, however, these changes are further pronounced during the first 3 postoperative months but seem to stabilize thereafter.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Changes of Supraspinatus Muscle Volume and Fat Fraction After Successful or Failed Arthroscopic Rotator Cuff Repair

et al. 2019

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Imaging of Failed Rotator Cuff Tears

Scaini

Motta

Milano

2021

The Failed Rotator Cuff

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The supraspinatus occupation ratios of both the ≥ 50% articular- and bursal-side partial-thickness rotator cuff tears were low and the infraspinatus occupation ratio of the ≥ 50% bursal-side partial-thickness rotator cuff tears was low

Yoo

Heo

Park

et al. 2019

Knee Surg Sports Traumatol Arthrosc

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Purpose The purpose of this study was to analyze the relationship between the occupation ratio and partial-thickness rotator cuf tears. Methods The study included and retrospectively investigated 683 patients with partial-thickness rotator cuf tears between 2013 and 2017. Fifty patients with impingement syndrome were also enrolled as the control group for normal-population comparison. The participants were divided into ive groups: Group A, control group; Group B, < 50% articular-side tears; Group C, ≥ 50% articular-side tears; Group D, < 50% bursal-side tears; and Group E, ≥ 50% bursal-side tears. Muscle volume was evaluated by measurement of each occupation ratio of the supraspinatus and infraspinatus tendons on the most lateral view of the T1-weighted oblique-sagittal images in which the scapular spine remained in contact with the scapular body. Results Fifty patients were enrolled in Group A. A total of 683 patients with Partial thickness rotator cuf tear were divided and classiied into the following groups: 272 into Group B, 153 into Group C, 161 into Group D, and 97 into Group E. The supraspinatus occupation ratios of all partial-thickness rotator cuf tear groups were signiicantly lower than those of the control group. Furthermore, the supraspinatus occupation ratios of Groups C and E (≥ 50% partial-thickness rotator cuf tears) were signiicantly lower than those of Groups B and D (< 50% partial-thickness rotator cuf tears). However, the infraspinatus occupation ratio of only Group E was signiicantly lower than that of the other groups. ConclusionThe supraspinatus occupation ratios of both the ≥ 50% articular-and bursal-side partial-thickness rotator cuf tears were lower than those of the other partial-thickness rotator cuf tears. Conversely, the infraspinatus occupation ratio of only the ≥ 50% bursal-side partial-thickness rotator cuf tears was low. Level of evidence IV.

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Serial Changes in 3-Dimensional Supraspinatus Muscle Volume After Rotator Cuff Repair

Cited by 21 publications

References 38 publications

Changes of Supraspinatus Muscle Volume and Fat Fraction After Successful or Failed Arthroscopic Rotator Cuff Repair

Changes of Supraspinatus Muscle Volume and Fat Fraction After Successful or Failed Arthroscopic Rotator Cuff Repair

Imaging of Failed Rotator Cuff Tears

The supraspinatus occupation ratios of both the ≥ 50% articular- and bursal-side partial-thickness rotator cuff tears were low and the infraspinatus occupation ratio of the ≥ 50% bursal-side partial-thickness rotator cuff tears was low

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