Changes of center of rotation and femoral offset in total hip arthroplasty

Annals of Translational Medicine
Jon A Bjarnason, Olav Reikeras

Abstract

It is a challenge to reconstruct the center of rotation (COR) and femoroacetabular offset anatomically in total hip arthroplasty (THA). We addressed the controversy how we manage to preserve the COR and femoroacetabular offset with an uncemented total hip prosthesis implanted with free hand technique. We analyzed a prospective series of 73 patients who underwent primary THA. The series was composed of 40 females and 33 males, mean age 64 years (range, 35-90 years). The reasons for THA were primary osteoarthritis (n=63) and developmental dysplasia of the hip (n=10). Pre- and postoperative X-rays were done in a standardized format for anterior-posterior (AP) radiographs of the pelvis, and digitalized measurements were done using SectraTM. We compared preoperative measurements with the final outcome to determine changes in COR and femoral offset. We found that 40 patients had their COR and 34 patients had their femoral offset preserved within preoperative 5.0 mm limits. Twenty-three patients had both their values of COR and femoral offset preserved within 5.0 mm limits. While a significant correlation was found between changes of femoral and global offset (r=0.786, P<0.001), there were no correlation between changes of acetabular ...Continue Reading

Citations

Nov 7, 2019·Archives of Orthopaedic and Trauma Surgery·Masanori KaseMichel P Bonnin
Jan 25, 2020·Archives of Orthopaedic and Trauma Surgery·Hideo KobayashiMichel P Bonnin
Mar 21, 2020·International Orthopaedics·Filippo MiglioriniJörg Eschweiler
Sep 23, 2021·European Journal of Orthopaedic Surgery & Traumatology : Orthopédie Traumatologie·Octavian AndronicPatrick O Zingg
Sep 25, 2021·Archives of Orthopaedic and Trauma Surgery·Niall P McGoldrickGeorge Grammatopoulos

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