Cadaveric Evidence on SI mobility

Reference:Rosatelli AL, Agur AM, Chhaya S. Anatomy of the interosseous region of the sacroiliac joint.J Orthop Sports Phys Ther. 2006 Apr;36(4):200-8

There is always much debate regarding the potential mobility at the sacro-iliac joint. This is a recent cadaveric study on the interosseous surface of the sacrum and the ilium.

What did they find? In specimens 55 years of age or older there was moderate to extensive ridging of the interosseous region of the SI joints in 100% of the specimens.

What else did they find? There was ossification of the of the SI ligaments in 60% of specimens.

What do they conclude? “These findings further support the contention that there is little to no movement available at this joint in older individuals.”

What is the clinical relevance? If a 25-year-old pregnant ex-gymnast presents with localized pain over the SI region…there is a good chance it is related to an SI dysfunction.

If a 65-year-old male presents with low back pain, although not impossible, it is less likely that the SI joints are involved!

Posted on: August 05, 2006

Categories: SI & Pelvis

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