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Anterior dysfunction of the sacroiliac joint as a major factor in the etiology of idiopathic low back pain syndrome.

The purpose of this article is to describe the author's theories as to how anterior dysfunction of the sacroiliac joints (SIJs) is a major factor in the etiology of idiopathic low back pain syndrome (ILBPS). Most research and treatment have been directed toward the intervertebral disk; however, it is unlikely that disk dysfunction is always the primary etiology. A review of the literature is used to outline and describe the characteristics of ILBPS and to make a case that these characteristics are consistent with those of a specific dysfunction of the SIJs. Functions of the intervertebral disks and the SIJs are described and related to SIJ dysfunction and to some of its common consequences. Treatment is discussed as it relates to the pathomechanics and their correction.