Predictability of sacral base levelness based on iliac crest measurements

Author:

Dott Gregory A.,Hart Curtis L.,McKay Claire

Abstract

Abstract A level sacral base plane is necessary to allow normalization of complex lumbosacral mechanics. Palpatory examinations are often used to evaluate for leg length discrepancy and pelvic obliquity despite improved accuracy and consistency of radiographic techniques. Treatment based on palpatory examinations suppose a direct and consistent relationship between the pelvic bones (innominates) and the sacral base. 1b evaluate the relationship between iliac crest levelness and sacral base levelness, a radiographic postural survey in the upright, weight-bearing position was performed on 358 men and women thought to have pelvic obliquity. Of these subjects, 293 demonstrated unlevel iliac crest heights or sacral base ~3'16 inch (4.76 mm), with iliac crest heights accurately predicting sacral base position 62% of the time. At ~3/8 inch (9.53 mm), 68% of the cases were accurately predicted. When the criterion for unlevelness was increased to ~ 112 inch (12.70 mm), the predictive accuracy improved to 83%. Radiographic findings in this study demonstrate a significant difference between iliac crest heights and sacral base position. In cases of mild to moderate short leg syndromes, the iliac crest height is an unreliable predictor of the direction or degree of sacral base levelness.

Publisher

Walter de Gruyter GmbH

Subject

Complementary and alternative medicine,Complementary and Manual Therapy

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