Anterior coverage after eccentric rotational acetabular osteotomy for the treatment of developmental dysplasia of the hip

• DOI: 10.1007/s00776-014-0592-5
• Publication Date: 2014-06-22T10:28:49Z
• Authors: Hiroshi Imai; Tomomi Kamada; Jun Takeba; Yoshitaka Shiraishi; Naohiko Mashima; Hiromasa Miura
• Keywords: Hip Dysplasia; Harris Hip Score

In periacetabular osteotomy for the treatment of developmental dysplasia hip, impairments in ADL due to limitations hip flexion can occur when anterior displacement is added lateral order obtain sufficient femoral head coverage. This study was conducted determine, by range motion (ROM) simulation based on CT images, minimum angle and internal rotation at 90° that necessary avoid after eccentric rotational acetabular (ERAO) estimate angles coverage plain radiography enable above flexion.Of 47 hips treated with ERAO our hospital from December 2007 May 2012, 27 without progressive osteoarthritis which could be scanned were examined included. The mean age time surgery 40.7 years (SD 1.8). postoperative follow-up period 30.2 months 3.6). Two male patients 25 female patients. disease stage prior pre-osteoarthritis 5 hips, early 11 hips. We checked whether capable activities require deep evaluation ADL. Radiographic examination performed before one year calculate LCE angle, Sharp AHI, VCA angle. impingement displaced fragment bone femur appeared measured using 3D CAD software, relationship between this physical findings, impairment, or radiographic also examined.22 out 116° more 42° ROM showed absence impairment a ≤42°, whereas 110° less 40° had associated ≥46°.Anterior requires ≥20° achieve structural stability an >25° adequate superior head. A ≤42° required during flexion. ≥46° probable risk factor pincer FAI syndrome ERAO.