Radiographic Evaluation of the Effect of Orthotics on the Unlevel Pelvis

D. Robert Kuhn, D.C., D.A.C.B.R., Sarah Smasal, D.C., Alethea Pappas, D.C., and Dennis Nosco. Ph.D., Logan College of Chiropractic


The purpose of this study was to determine if there was an effect on pelvic unleveling with the use of custom­made flexible orthotics in subjects with asymmetrical flexible pes planus.

1st-trimester students with pelvic unleveling of at least 4 mm and asymmetrical pes planus were identified and signed informed consent. Anteroposterior (AP) and lateral full­spine radiographs were taken on the subjects without the orthotics in place. The subjects then wore their orthotics for a minimum of 2 weeks. After this interval, the subjects under­went a second radiographic examination consisting of AP and lateral full-spine views. Iliac crest height measurements were obtained from the first and second AP radiographic exami­nations. The researchers then analyzed the percentage of the subject population that improved, were unchanged, and those whose measurements worsened. A comparison of the results was also performed using a t test analysis.


The use of custom-made orthotics demonstrated a normal­izing effect on pelvic measurements in 20/35 subjects. In 10/35 the values remained the same and worsened in 5/35. The average unleveling before the insertion of the orthotics was 10 mm and the average unleveling after the insertion of the orthotics was 8.9 mm. Of the subject population who improved, there was a preorthotic measurement average of 8.8 mm and a postorthotic measurement average of 6.5 mm. The t test did not reach statistical significance (p = .09).



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