کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4074322 1267006 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of posterior capsule tightness on subacromial contact behavior during shoulder motions
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Effects of posterior capsule tightness on subacromial contact behavior during shoulder motions
چکیده انگلیسی

BackgroundAlthough posterior capsule tightness is believed to cause abnormal contact in the subacromial space, it is not clear whether this tightness changes the contact between the acromion and humeral head.Materials and methodsNine fresh, frozen cadaveric shoulders were used to measure contact pressure on the coracoacromial arch during passive flexion, abduction, and internal and external rotation at 90° of elevation in the scapular plane, as well as horizontal adduction and abduction. The site where the peak contact pressure occurred was also observed. The posterior capsule in the region from 8 to 10 o’clock in the right shoulder was plicated to simulate posterior capsule tightness.ResultsPeak contact pressure significantly increased with the tightened posterior capsule during flexion. Although peak contact pressure on the coracoacromial ligament during internal rotation significantly increased after capsule tightening, there was no significant increase in pressure when considering the entire coracoacromial arch. The angle where the peak contact pressure occurred during flexion was not significantly far from the end range. The site of the peak contact pressure in 7 of 9 shoulders was on the lesser tuberosity during flexion, regardless of the posterior capsule tightness.ConclusionsPosterior capsule tightness increased contact pressure mainly on the lesser tuberosity during flexion. The peak contact pressure occurred close to the end range of flexion, mainly on the lesser tuberosity. These findings are useful to understand the contribution of posterior capsule tightness to subacromial contact.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Shoulder and Elbow Surgery - Volume 21, Issue 9, September 2012, Pages 1160–1167
نویسندگان
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