An in-vitro investigation of the CPS-Plus femoral stem: influence of the proximal centraliser on cement pressurisation during stem insertion.
The CPS-Plus stem is designed for use with a proximal and distal stem centraliser. This in-vitro study examined the cement pressurisation achieved during insertion of the CPS-Plus femoral stem into a model femur. Cement pressures were measured at proximal, mid and distal stem levels. Pressures were recorded during insertion of the CPS-Plus stem with both proximal and distal centralisers and compared with those achieved when only a distal centraliser was used with digital occlusion of the proximal femur. The CPS-Plus with a proximal centraliser generated significantly greater cement pressures than the CPS-Plus without a proximal centraliser at proximal and mid-stem regions. The use of a proximal stem centraliser may improve the cement-bone interdigitation and shear strength at the cement-bone interface, particularly in the region of the proximal femur.
Gozzard
Charles
C
Department of Orthopaedic Surgery, University of Bristol, UK. DrsGozzard@compuserve.com
Gheduzzi
Sabina
S
Miles
Anthony W
AW
Learmonth
Ian D
ID
D001696:Biomechanical Phenomena; D001843:Bone Cements; D002484:Cementation; D005269:Femur / Q000502:physiology*; D006622:Hip Prosthesis; D006801:Humans; D066298:In Vitro Techniques; D011312:Pressure; D011474:Prosthesis Design
D001843:Bone Cements