Acromial spur formation in patients with rotator cuff tears
Section snippets
Methods
Acromial samples were taken from 15 consecutive patients undergoing modified open acromioplasty and rotator cuff repair. All had medium-sized cuff tears. The mean age was 62.2 ± 1.75 years, with a male-to-female ratio of 11:4. Ethical committee approval was obtained before the study was undertaken. Informed consent was obtained with regard to the reason for this study and the collection of suitable acromial samples. Patients also gave their permission to be given oxytetracycline tablets
G6PD activity
The mean G6PD activity per cell in osteoblasts on the inferior aspect of the tip of the acromial enthesis (0.92 ± 0.04 [mean ± SEM]) (Figure 1, A) was statistically significantly higher (P < .001, paired t test) than on the superior aspect (0.80 ± 0.03) (Figure 1, B). This increased level of G6PD activity on the acromion’s inferior aspect was also evident, within any single patient, when the activity of these two sites were compared (Figure 2), and this was also reflected in a significant
Discussion
This study concentrated on the coracoacromial ligament’s insertion onto the acromion, namely the enthesis, and thus bone growth at the ligament insertion is described as an enthesophyte.4 Therefore, the commonly used term spur in this text refers to an acromial enthesophyte at the coracoacromial ligament’s insertion.
G6PD activity is a rate-limiting step of the pentose phosphate shunt, which is used during energy metabolism for the production of reducing equivalents that contribute to many
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