Neer first popularised the use of primary hemiarthroplasty to treat complex proximal
humerus fractures, especially when the humeral head is nonviable or not
reconstructable with internal fixations, and with younger patients. (Copied from article).
The present concepts in Total Hip Arthroplasty advocate mechanical cement interlock
with trabecular bone utilising the third-generation cementing technique. However, the
force generated can easily reach peak pressure of 122 kPa to 1500 kPa, leading to
extrusion of cement through nutrient foramina into femoral cortex into nutrient vessels,
henceforth the retrograde arteriovenogram. (Copied from article).