The results of anterior open reduction approach for Developmental Dysplasia of the Hip in Children under 12 months old

NGUYEN NGOC HUNG, Nguyen Do Ngoc Hien


Background: This study has aimed to evaluate the outcomes of open reduction technique by the anterior approach performed in the,< 12 months old infants.

Methods: The patients who underwent an open reduction by the anterior approach for typical dysplasia of hip between the years 2008-2012 were screened retrospectively. The study included 12 hips of 12 patients. The correction percentage of acetabular index was calculated by acetabular angle measurements performed prior to operation and at the last control examination. Avascular necrosis (AVN) was classified by the criteria of Kalamchi-MacEwen while radiological and clinical evaluations were performed using Severin and McKay criteria.

Results: The mean age at surgery was 9.91 months (9-11 months) while mean follow-up period duration was found 52.75 months (43 - 64 months). According to Severin radiological criteria, Eveluating postoperative patients  with Excellent 5 (41.7), Good 4 (33.3%), Mediate 2 (16.7%), Poor 1 (8.3%).

Whereas, according to the evaluation based on McKay criteria, Excellent 8 (66.7%), Good 3 (25.0%) and Poor 1 (8.3%). Avascular necrosis (AVN) of the femoral head was encountered in 1 (8.3%) of the 12 hips. According to the criteria of Kalamchi-MacEwen Classification; 1 hip revealed type I avascular necrosis, respectively.

Conclusions: We have encountered according to outcomes data of this study that open reduction technique by the anterior approach for treatment of developmental dysplasia of the hip (DDH) presented more successful clinical and radiological outcomes in the 9 - < 12 months old infants.


Open reduction, developmental dysplasia of the hip, avascular necrosis, anterior open reduction approach

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