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. 2002 Dec 19;27(2):78–84. doi: 10.1007/s00264-002-0417-6

Kotz and Ganz osteotomies in the treatment of adult acetabular dysplasia

Cengiz Sen 1,✉, Mehmet Asik 2, I Remzi Tozun 2, Nadir Sener 3, Murat Cinar 2
PMCID: PMC3460650  PMID: 12700929

Abstract

In hips with acetabular dysplasia, we performed Kotz osteotomy (group 1) in 22 hips (20 patients; mean age 24.3 years) and Ganz osteotomy (group 2) in 23 hips (22 patients; mean age 23.1 years). Group 1 was followed 83.3 (56–112) months and group 2 40.9 (24–66) months. In group 1, Harris hip score improved from average 74.9 to 86.9, mean center edge (CE) angle from −4.5° to 30.3°, and mean vertical center edge (VCE) angle from 5.3° to 36.2°. In group 2, Harris hip score improved from average 76.6 to 91.1, mean CE angle from −5.9° to 32.0°, and mean VCE angle from 5.0° to 41.3°. Using Pauwels criteria, regression was observed in 12 hips in group 1 and one progressed. In group 2, 15 hips showed regression and three progressed. In patients treated with Ganz osteotomy, the complication rate was higher and the complications more serious than in patients treated with Kotz osteotomy. Most complications were, however, seen among the first ten patients treated with Ganz osteotomy. Although we detected no significant difference between the two groups in terms of clinical and radiological findings, we believe the outcome to be slightly better after a properly performed Ganz osteotomy.

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