Abstract
Purpose Osteonecrosis of the femoral head (ONFH) requires effective removal of necrotic tissue to improve surgical outcomes. Conventional curettes often fail to address clinical needs due to limitations in cutting capability, strength, and adaptability. This study introduces a disposable multi-angle eccentric curette designed to enhance necrotic bone removal during core decompression surgery. Methods The curette was designed with a stainless head featuring wavy cutting edges and oblique grooves for efficient cutting and debris removal. An eccentric rotation mechanism enabled adjustable scraping radii through incremental rotations (60°/120°/180°), forming an inverted bowl-shaped removal area. Performance was evaluated through static torsional strength and dynamic abrasion tests, along with usability assessments by seven orthopedic surgeons. Results The curette achieved average maximum torque of 849.72 ± 50.57 N-cm, exceeding the clinical benchmark of 640 N-cm. Dynamic testing over 300 simulated cycles demonstrated stable cutting performance and precise scraping, with diameter deviations remaining within acceptable limits (initial: 1.05%, final: 5.75%). Usability feedback highlighted its practicality and ease of operation, achieving a satisfaction rate of 97.6%. Conclusion This innovative design addresses critical limitations of existing tools by offering enhanced strength, adaptability, and cutting efficiency. These findings validate the curette’s potential to improve ONFH surgical outcomes.