Porous polysulfone coatings for fixation of femoral stems by bony ingrowth.
Sixteen porous polysulfone-coated canine femoral stems were inserted into 14 dogs. Coatings were approximately 40% porous, with an average pore size of 125 or 250 microns. Bone was formed within at least about 30% of the surface pores of the implants. The tissue ingrowths filling the pores included marrow and fibrous tissue. Correlated roentgenographic and histologic observations revealed a trabecular "lamina dura" at the coating-bone interface and relatively dense trabeculae distal to the stem tip. These observations support the concept of coating femoral prostheses with porous material for cement-free stabilization.
D000818:Animals; D001846:Bone Development; D002858:Chromium Alloys; D004285:Dogs; D005270:Femur Head / Q000033:anatomy & histology / Q000502:physiology / Q000601:surgery; D006622:Hip Prosthesis; D009984:Orthopedic Fixation Devices; D013450:Sulfones
D002858:Chromium Alloys; D013450:Sulfones