Rotational acetabular osteotomy for acetabular dysplasia

Objective To introduce the method and effect of the treatment of acetabulum dysplasia by rotation acetabulum osteotomy.Methods 18 hips with acetabulum dysplasia were treated by rotation acetabulum osteotomy with measurement of JOA scoring preoperatively and postoperatively,CE angle and Sharp angle.Osteotomy were performed archedly 2.0 cm from acetabulum brim,the acetabulum was rotated anteriorly,laterally and inferiorly,the allograft bone and osteolet were inserted into the gap,and fixed by absorbable screws.Results The average follow-up time were 4~42 months.X-ray showed the relationship and shape of acetabulum and femoral head were restored to normal.Bone graft healed up within 2 months.The function of 17 hips were restored normal within 6 months.The JOA,CE and Sharp angles were restored from 75.2±3.1,15.8°±1.3° and 47.3°±2.5° preoperatively to 93.5±3.5,33.4°±1.7° and 29.8°±2.1° postoperatively.The JOA scores increased 18.3,CE angle increased 17.6°,and the Sharp angle decreased 17.5°.The difference was significant(P0.05).Conclusions Rotation acetabulum osteotomy can correct the abnormal relation between femoral head and acetabulum,relieve the pain and effectively arrest the progression of osteoarthritis.It is an ideal method to treat the acetabulum dysplasia combined with osteoarthritis in early and medium stage.