Though THA against the perfect dislocation coxarthropathy is a rare operation, you should defend the shortening bone cutting of the femoral bone along with the position of establishment of the implant, the bone graft method and the amount of lower extremity extension and neuroparalysis perioperative treatment degree operation. We report it because we put 23 cases of postoperative results which passed for more than postoperative 28 months together.

Material is The coxarthrosis of the congenital dislocated 23 hip cases. An age was an average 56.4 years old to 67 years old more than 51 years old at the time of the operation. A follow-up period was an average 77 months from 28 months until 142 months. JOA score was used as the clinical evaluation. thigh pain was investigated again, too. Subsidence and Spot Welds were investigated as an X-rays evaluation.

When it is left, a congenital dislocated hip case causes the trouble of the spine and the knee opposite. THA that it faces a congenital dislocated hip case with the sufficient preoperative plan by the accurate operating technique can be said as the effective means by this investigation when both of the clinical evaluation and the X-rays evaluation consider that it was a good results, too.