Patterns of cement distribution in total hip resurfacing arthroplasty.
In this in vitro study, 4 different resurfacing implants have been evaluated with a simulated femoral head: 2 types of cement have been used (low and high viscosity) and 2 different cementing techniques have been performed: direct (cement apposition directly on the femoral head) and indirect (cement poured into the femoral component). High-viscosity cement shows a homogeneous distribution all over the femoral head. Low-viscosity cement shows a massive polar concentration with insufficient if not absent distribution in the equatorial zone. Polar cement concentration could be held as a risk factor for early implant failure. It could have 2 effects on femoral head: biologic (excessive local exothermic reaction could cause necrosis of the osteocytes) and biomechanical (it could lead to uneven load distribution on the femoral head).
Falez
Francesco
F
Department of Orthopedics and Trauma, Santo Spirito In Sassia Hospital, Rome, Italy.
Favetti
Fabio
F
Casella
Filippo
F
Papalia
Matteo
M
Panegrossi
Gabriele
G
D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D001843:Bone Cements; D019544:Equipment Failure Analysis; D006622:Hip Prosthesis; D006801:Humans; D008953:Models, Anatomic; D012307:Risk Factors; D014783:Viscosity; D016474:Weight-Bearing
D001843:Bone Cements