33results about How to "Reduced stress shielding" patented technology

A motion restoring intervertebral device includes first and second articulating components positioned between adjacent vertebrae with the articulating surface of the first component being formed by a circular domed convex projection having a first radius. The articulating surface of the second component is formed by a generally concave recess having the first radius in the medial-lateral direction and a second larger sweeping radius in the interior-posterior direction so that the components are capable of rotating against each other in all directions and translate against each other in the anterior-posterior direction, whereby translation away from the center of the first radius will produce device and joint distraction to limit excessive translation.

A self-adaptive later-period stable type femoral stem prosthesis comprises a femoral stem prosthesis near-end part and a femoral stem prosthesis far-end part, wherein the femoral stem prosthesis near-end part is a solid body; the femoral stem prosthesis far-end part is of a controllable porous structure; the transition area of the femoral stem prosthesis near-end part and the femoral stem prosthesis far-end part is a boundary part; the controllable porous structure is constructed through porous subunits in an array mode; the porosities of the porous subunits at different positions of the femoral stem prosthesis far-end part are different; and modeling of the femoral stem prosthesis far-end porous part is achieved by arraying the porous subunits. The femoral stem prosthesis can reduce the femoral stem far-end elastic modulus, can achieve self-adaptive deformation according to the loads and surrounding bone morphology when being planted, improves the contact degree of the prosthesis near end and surrounding bone, promotes transferring of the loads to the near-end femur, avoids near-end bone loss caused by stress shielding, and reduces risks of near-end looseness and sinking.

A method for producing a customised orthopaedic implant is provided. The method involves scanning a bone from which a diseased region of bone will be resected to obtain a three dimensional digital image of an unresected volume of bone; scanning the bone after a diseased region of bone has been resected to obtain a corresponding three dimensional digital image of a resected volume of bone; and comparing the three dimensional digital image of the unresected volume of bone to the corresponding three dimensional digital image of the resected volume of bone to estimate a volume of bone that has been resected. The estimate of the volume of bone that has been resected is used to design a customised orthopaedic implant that substantially corresponds to the configuration of the resected volume of bone, the implant being configured to substantially restore a biomechanical function of the bone. Finally the customised orthopaedic implant is manufactured and provided for insertion into the resected region of bone.