Cementless Total Hip Arthroplasty With a High Hip Center for Hartofilakidis Type XXXX : Results of Midterm Follow-Up.

@entity1 @entity572
BACKGROUND: Acetabular reconstruction in adults with Hartofilakidis type @entity572 is a major technical challenge. The purpose of this retrospective study was to evaluate hip function and radiographic outcomes regarding high hip center at midterm follow-up. METHODS: From January 1, 2007 to December 31, 2009, 37 @entity1 who had Hartofilakidis type @entity572 underwent a primary total hip arthroplasty using a high hip center technique. Functional, radiographic, and survivorship outcomes were evaluated. RESULTS: Of the 37 @entity1 , 31 @entity1 (83.8%) were available for the mean follow-up of 6.1 years (range, 1.5-7.6 years). Thirty-one cementless cups were located at an average vertical distance of 38.1    3.3 mm and at a mean horizontal distance of 35.5    3.4 mm. The mean ratio of the height of the hip center was 2.4% (range, 2.0%-2.9%). The Harris Hip Scores were improved from 50.3 points (range, 38-63 points) preoperatively to 92.3 points (range, 85-100 points) at the final follow-up (P < .001). Four @entity1 continued to present with Trendelenburg gait pattern at the last follow-up. With use of revision for any reason and aseptic loosening as the end point, the 5-year survival rates were 90.3% (95% CI, 79.9%-100%) and 93.3% (95% CI, 84.3%-100%), respectively. CONCLUSIONS: The high hip center technique in conjunction with a cementless acetabular component seems to be a valuable alternative to achieve satisfactory midterm outcomes for Hartofilakidis type @entity572 .
