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Sacroiliac Joint Anatomy

Cartilage

Sacroiliac joint anatomy (SI or sacro-iliac) is quite unlike any other joint in the body, because the joint surfaces are covered by two different kinds of cartilage.

Like all true joints, there is cartilage on both sides of the SI joint surfaces, but the articular surfaces have both hyaline cartilage (glassy) and fibro cartilage (spongy) surfaces that rub against each other. No other joints have this feature!

The joint also has many large ridges and depressions that fit together like the pieces in a puzzle.

Unlike most other joints, the Sacroiliac Joint Anatomy is not designed for large movements. The rocking movements made with every step are in fact very small. The SI joint usually only moves about two to four millimeters during weight bearing and forward flexion. It is a "viscoelastic joint", meaning that its major movement comes from giving or stretching.

Furthermore, it is common for the SI joint to become even more stiff and actually lock, usually due to injury, but also due to prolonged sitting, for example. This explains why manipulation is the treatment of choice for the very painful SI joint syndrome.

Orthopaedic surgeons, researching arthritis in knees and hips make the following statement: Mechanical factors, including joint instability and malalignment, contribute to the progressive degeneration that characterizes hip and knee arthritis. Would that apply to the sacro-iliac joint? Absolutely!

Mobilization may also be useful for keeping the joint loose using certain specific exercises and stretches that are important in the rehabilitative phase of the treatment.



Where is the Sacro-iliac Joint?

The Pelvis - a ring of three bones

X-ray of the Pelvis showing the sacroiliac joints


Chiropractic

Medical doctors have for years denied that the SI joint is a movable joint. Finally, science has prevailed, and Chiropractic philosophy has been vindicated. Reducing the malalignment in the SI joint, we believe, will reduce not only the pain in the joint, but reduce progressive degenerative changes.

Sacro-iliac Joint and hip arthritis

There is without a doubt a connection between chronic fixations in the Sacroiliac Joint Anatomy, and hip arthritis. Every case of hip arthritis that I find has a concommitent SIJ fixation. However, what we haven't yet discovered is whether the SIJ fixation causes the hip arthritis, or the hip arthritis the SIJ fixation. Chicken and egg.

What is also certain is that many cases of so-called Failed Hip Surgery are not surgical failures. The surgeon did a fine job, but because the SIJ fixation has not been corrected, chronic pain continues.

Post hip surgery, the Thompson Drop technique is highly effective for treating the SIJ fixation.

Read more …

FROM THE COAL FACE

A 70 year old woman consulted me this week for neck pain. Unconnected, she still has difficulty walking since a hip replacement 18 months ago. The surgeon insists that the hip is fine.

Bingo! A profound jamming of the SIJ.

I say unconnected. Could the still locked up SIJ be the underlying cause of her neck pain. Perhaps.

My advice? Before going for a hip replacement, give your chiropractor two months to work with your hip. It may save you the surgery, and freeing up the SIJ will make the surgeon's work so much more effective in any case.

CANCER

Prostate cancer has a high tendency to spread to bone, especially the pelvis.

If you have sacro-iliac joint anatomy pain, are a male and over 45, then your chiropractor will probably ask some questions about the health of your prostate. Prevention is the key.

Interesting research conclusively proves that a tomato a day decreases the risk of prostate cancer dramatically.

Read more …

Return from SACROILIAC JOINT ANATOMY to SACROILIAC JOINT home page.

Inspirational Stories

Read inspirational stories of tenacious patients who ultimately experience the fruit of their patience, and chiropractors who against all odds have succeeded. Read more …

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