Purpose: This study evaluated the short-term results of ceramic articulation total hip arthroplasty in cementless total hip arthroplasty.
Materials and Methods: 142 hips were followed-up for more than 2 years after cementless total hip arthroplasty using ceramic-on-ceramic articulation. The mean age and follow-up period was 58.3 years and 3.0 years, respectively. The Harris hip score and postoperative hip pain were analyzed clinically. The radiological results were assessed using various radiological indices.
Results: At the last follow-up, the Harris hip score improved from 58.1 points preoperatively to 93.2 points postoperatively. There were 4 cases (2.8%) of significant hip pain. Radiologically, all the stems demonstrated stable fixation. The inclination of the acetabular cup was changed significantly in 2 cases (1.4%), which were diagnosed as being loosened. A radiolucent line was observed around the stem in 9 cases (6.3%), and around the cup in 3 (2.1%). Endosteal new bone formation was observed around the stem in 50 cases (35%), and around the cup in 55 (38.5%). No osteolysis was observed around the stem and the cup.
Conclusion: The short-term results of ceramic on ceramic articulation hip arthroplasty were excellent without osteolysis.

Purpose: To report the results of a minimum three-year follow-up of cementless total hip arthroplasty using the COREN Hip System^® (Corentec, Seoul, Korea), which is the first total hip prosthesis developed in Korea.
Materials & Methods: A total of 57 patients (68 hips) who had undergone cementless total hip arthroplasty using the COREN Hip System^® between July 2003 and March 2004 were analyzed clinically and radiographically after a minimum follow-up of three years after the index arthroplasty.
Results: The mean Harris hip score improved from 46 points preoperatively to 95 points at the one-year follow-up and to 99 points at the three-year follow-up. All the patients reported a good or excellent satisfaction with the results of surgery. All prostheses showed radiographic evidence of stable bony fixation, and no hips showed evidence of osteolysis or prosthesis loosening. During the follow-up period, there were no complications such as a deep infection, dislocation or ceramic fracture in any hip, and no revision surgery was required.
Conclusion: The clinical and radiographic evaluations of Cementless total hip arthroplasty using the COREN Hip System^® showed excellent outcomes after a minimum follow-up duration of three years.