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MR Vol.10 No.3 indexに戻る
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MODERN RHEUMATOLOGY
Vol.10 No.3 |
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Extensibility of the supraspinatus muscle with
a rotator cuff tear evaluated by magnetic resonance imaging |
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| K. Nakagaki1, J. Ozaki 2, Y. Tomita3, S.
Tamai3 |
(1)Department of Orthopaedic Surgery, Gojo
Prefectural Hospital, 197 Nohara, Gojo, Nara 637-8511, Japan Tel.
+81-7472-2-1112; Fax +81-7472-5-2860 e-mail: nakagaki@mahoroba.ne.jp
(2)Department of Orthopaedic Surgery, Nara Prefectural Rehabilitation Center,
Nara, Japan
(3)Department of Orthopaedic Surgery, Nara Medical University, Nara, Japan |
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| Abstract |
| Abstract An estimate of the extensibility of
the supraspinatus muscle after a rotator cuff tear is useful in selecting
the most appropriate operative procedure and the prognosis after
surgery. We studied the relationship between the morphological findings
of the supraspinatus muscle on magnetic resonance imaging and its
elongation length. Twenty-one shoulders of 20 patients with massive
rotator cuff tears were scanned parallel to the long axis of the
supraspinatus muscle. The ratio of the largest width of the supraspinatus
muscle belly to the distance from the greater tuberosity to the proximal
end of the supraspinatus muscle was termed the supraspinatus muscle
belly ratio. The appearance of linear bands and the degree of retraction
of the tendon of the supraspinatus muscle were analyzed. The extensibility
of the supraspinatus muscle decreased when the degree of retracted
tendon was high, while no correlation was found with the length of
the rotator cuff defect, the supraspinatus muscle belly ratio, or
the appearance of linear bands. |
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| Key words |
| Key words Extensibility ・ Supraspinatus muscle ・ Tendon fiber
・ Rotator cuff tear ・ Magnetic resonance imaging |
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