Data from the Japan Arthroplasty Register and JOANR

Joint arthroplasty is an established procedure for treating advanced joint destruction in the upper and lower limbs. The number of arthroplasty surgeries continues to increase in aging societies. However, as the number of primary surgeries increases, so does the number of revision surgeries owing to implant loosening and poor postoperative patient satisfaction. Moreover, revision surgeries are technically more difficult than primary surgeries, resulting in low long-term durability, a greater burden on patients, and the medical economy. Therefore, it is necessary to investigate and compare the prognoses of different implant designs and surgical procedures to identify the reasons for revision surgery. However, the number of cases and observation periods are limited in small-scale studies conducted at each institution. Since it is essential to conduct large, longitudinal, and cross-sectional surveys in each country to obtain accurate and useful information that considers racial differences and healthcare systems, an arthroplasty registry system was established.