Analysis of Cementless Acetabular Cup Rotation

作者：McCartney William T^*; Lostado Lorza Ruben; Mac Donald Bryan J

来源：International Journal of Applied Research in Veterinary Medicine, 2015, 13(2): 122-124.

• hip replacement
• acetabular
• loosening
• cemenetless

Aseptic loosening of cementless acetabular cups is a recognised problem. To investigate this issue, acetabular cups (Kyon, Zurich) were implanted into artificial bone (Sawbones, Malmo) in accordance with manufacturer instructions, and loaded in mediolateral rotation under laboratory conditions. The torque required at different cup depths were recorded. The theoretical forces acting on the acetabular cup were calculated. The angle of the force, relative to the ground, acting on the cup during normal loading, was calculated as 113.48 degrees. The results revealed that even small amounts of depth insufficiency increased the risk of mediolateral rotation of the cup at normal torque forces. The Kyon cup should be implanted with no holes showing at the dorsal acetabular rim.

• 出版日期2015