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General Orthopaedics

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Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_19 | Pages 23 - 23
1 Dec 2014
Prins J de Beer M
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Background:

With the increase in the average age of the population, the incidence of symptomatic rotator cuff tears will also increase. Combined with more access to information via the internet etc., the patient population is more informed of the treatment modalities available and is expecting good reproducible results of their surgeries.

Study:

288 of 426 consecutive open rotator cuff repairs (2010–2012) were examined at 6 month follow up and evaluated for ranges of motion, the integrity of the deltoid and specifically the sonographic integrity of the cuff. All procedures were done in the same manner by the same surgeon (TdB). At the 6 months follow-up all had a sonar of the repaired cuff.

As a second part of the study 319 of 462 consecutive cuff repair patients were phoned and evaluated by means of the ASES score insofar satisfaction with their shoulder as well as functional outcome are concerned.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_29 | Pages 30 - 30
1 Aug 2013
de Beer M
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Purpose:

The objective of this study was to determine the tensile strength of the different components of the rotator cuff tendons and their relationship to rotator cuff tears.

Method:

The tests were done on a newly designed and built test-bench that performed the tests at a consistent rupture speed. The tests were done on four fresh frozen cadaver shoulders. The capsular and tendinous layers of the rotator cuff were divided leaving them only attached on the humeral side. Separate tensile tests were done on these tendons, after they were divided into 10 mm wide strips before testing. The tendon thickness was also measured.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_29 | Pages 78 - 78
1 Aug 2013
de Beer M
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Purpose:

To determine the insertion of the different layers of the rotator cuff and apply it to rotator cuff tears. Anatomical insertion of the rotator cuff holds the key to a proper anatomical repair.

Method:

A study of the rotator cuff insertion was done in conjunction with MSc student department Anatomy. The rotator cuff consists of a capsular and tendinous layer. They have different mechanical properties. The capsular layer inserts ± 3 mm more medially on the tuberosity and the tendinous layer more laterally. It was shown that the superficial layer extends beyond the greater tuberosity and connects the supra-spinatus tendon to the sub-scapularis tendon via the bicepital groove. This connection was called the “rotator hood”. The “rotator hood” has a mechanically advantageous insertion, is a strong structure with a compressive force on the proximal humerus.