Effect of Tendon Release and Delayed Repair on the Structure of the Muscles of the Rotator Cuff: An Experimental Study in Sheep by C. Gerber, D.C. Meyer,

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Presentation transcript:

Effect of Tendon Release and Delayed Repair on the Structure of the Muscles of the Rotator Cuff: An Experimental Study in Sheep by C. Gerber, D.C. Meyer, A.G. Schneeberger, H. Hoppeler, and B. von Rechenberg J Bone Joint Surg Am Volume 86(9): September 1, 2004 ©2004 by The Journal of Bone and Joint Surgery, Inc.

Drawing of the right shoulder in a sheep with the sensor in situ. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

The sequence of the experimental steps and the respective studies. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

The mean retraction (and standard deviation) of the tendon end measured on computed tomographic scans. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

The atrophy of the involved infraspinatus muscle was measured as the square area of the infraspinatus on longitudinal computed tomography sections and was indicated as a mean percentage (and standard deviation) of that of the control side. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

Fatty infiltration of the infraspinatus muscle on the involved side and the contralateral, uninvolved control side of the six sheep. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

Typical light microscopic appearance of the toluidine blue-stained muscle at the time-points represented by 0 to 5. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

Electron microscopic changes in the fibrillar volume per fiber, fiber volume per muscle volume, interstitial fat, and other interstitial cell volume. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

Electron microscopic changes in the mitochondrial volume per fiber and in the capillary volume of the whole muscle. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.

Transverse computed tomography scan showing a section of a sheep at forty weeks after the tendon release. C. Gerber et al. J Bone Joint Surg Am 2004;86: ©2004 by The Journal of Bone and Joint Surgery, Inc.