Abstract

FALCINELLI, Sebastián; GOMEZ, Horacio; GARRIDO, Anibal  and  ARRONDO, José I. Osteotomías de reorientación acetabular: Estudio comparativo entre osteotomía triple y osteotomía periacetabular. Rev. Asoc. Argent. Ortop. Traumatol. [online]. 2017, vol.82, n.1, pp.28-39. ISSN 1852-7434.

Introduction: The indication of acetabular osteotomies has changed over the time. In recent years, the boom for these techniques has emerged with the works of Ganz. We present a comparative study between the two techniques in terms of their biomechanical results. Methods: We evaluated 12 cases with triple osteotomy and 12 cases with periacetabular osteotomy by measuring the lateral and anterior displacement of the center of rotation of the femoral head. We also measured the percentage of lateral and anterior femoral head cover, and tilt and acetabular anteversion angles. All data were compared with the contralateral hip without pathology. Results: Lateral displacement of +2.9 mm and +2.47 mm, comparing the contralateral hip, was found with the triple osteotomy. In patients with periacetabular osteotomy we found a lateralization of +7.6 mm and an anterior flexion of +6.67 mm. The percentages of femoral head cover (average) were: lateral 89% and anterior 99.4% with triple osteotomy, and 88% and 80%, respectively, with the other procedure. The acetabular orientation angles were 39.4º of inclination and 27.1º of anteversion with triple osteotomy, and 45.5º and 23.11º, respectively, with periacetabular osteotomy. Conclusions: Preservation of bone bridge between the ilium and ischium restricts rotation to give anterior coverage and shifts the cephalic forward rotation, preferring the triple osteotomy in cases of severe anterior lack of coverage of the femoral head.

Keywords : Osteotomy; Ganz; Triple; Hip; Dysplasia.

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