The Journal of Bone and Joint Surgery, Vol 60, Issue 5 608-613, Copyright © 1978 by Journal of Bone and Joint Surgery, Inc
Improved fixation of the femoral component after total hip replacement using a methacrylate intramedullary plug
I Oh, CE Carlson, WW Tomford and WH Harris
When the distal part of the medullary canal of the femur was plugged with a
bolus of methylmethacrylate prior to the insertion of cement and femoral
component, fixation of the prosthesis was improved in vitro. A special
syringe was devised to introduce the plug at the desired level. When the
plug was used, the penetration of the cement into the trabecular bone
lining the canal was increased, and subsequent push-out tests showed that
the force necessary to disrupt the methacrylate from the bone was
significantly greater. Casts of the methacrylate from femora with and
without plugged canals showed that the surfaces of the casts made with the
canal plugged conformed much more completely with the irregularities of the
bone and provided more intimate contact at the cement-bone interface.