stress shielding

stress shield·ing

(stres shēld'ing),
Osteopenia occurring in bone as the result of removal of normal stress from the bone by an implant.

stress shield·ing

(stres shēld'ing)
Osteopenia occurring in bone as the result of removal of normal stress from the bone by an implant.
References in periodicals archive ?
Amis, "The influence of tibial prosthesis design features on stresses related to aseptic loosening and stress shielding", Journal of Mechanics in Medicine and Biology, 11(1), 55-72, (2011).
Importantly, CFR-PEEK can result in a modulus closely matched to that of cortical bone, and is shown to encourage load sharing and minimize stress shielding, necessary for healthy bone.
(1,2) The aim is to provide a physiological force transmission into the calcar area in order to prevent stress shielding and subsequent aseptic loosening.
They concluded that using FGM in the design of cementless hip stem solves the problem of stress shielding as well as decreases the interface shear stress between the implant and femur.
It might potentially be more optimal in minimizing the bone stress shielding [29].
However, after the implant is inserted, the load equilibrium is disturbed, new stress redistribution occurs and this may cause stress shielding phenomenon [1, 2, 3].
Peak contact pressure and stress shielding effect are two biomechanical parameters that have critical importance in success of TKR.
The collared SMP implant gives near about 62% stress shielding in proximal zone.
The stresses observed in the cortical bone were below the reported ultimate strength for cortical bone under compression (approximately 200 MPa) [65] and reportedly below the fatigue strength for cortical bone, quoted as 40-80 MPa @[10.sup.7] cycles [70] but there are long-term concerns regarding the combined action of cyclic joint forces and the stress shielding effect in the femur.
Stress shielding in the bone tissue was found to occur with the hip hemi-resurfacing prosthesis considered in this study.
Stress Shielding : This is an important phenomenon as the metals are a decade order stiffer (modulus of elasticity) compared to bone and bone is 5-6 times stiffer than bone cement, the major stress is shared by the stiffer materials leaving the bone shielded from the stress flow, which may go below the physiological level of stress leading to disuse osteoporosis and failure of the construct.
Most popularly used metals and metal alloy implants cause severe stress shielding at the proximal part of the femur and the interface stress is concentrated at the distal tip of the prosthesis giving rise to mid thigh pain.