title: Radiographic and histologic study of porous coated tibial component fixation in cementless total knee arthroplasty.
abstract: Radiographic changes occurring beneath three types of non-cemented, porous coated, cobalt-chrome tibial components were retrospectively reviewed a minimum of 1 year after arthroplasty. Radiolucent zones, radiodense lines, and loose sintered particles were commonly observed. These changes are consistent with non-rigid, fibrous tissue fixation. Histologic evaluation of two specimens retrieved at revision surgery revealed predominantly fibrous tissue within the porous surface under the tibial plateau. The long-term implication of fibrous tissue fixation of porous coated tibial implants in unknown.
authors.affiliation: Anderson Orthopedic Research Institute, Arlington, VA 22206.
authors.forename: G A
authors.initials: GA
authors.lastname: Engh
authors.forename: J D
authors.initials: JD
authors.lastname: Bobyn
authors.forename: T L
authors.initials: TL
authors.lastname: Petersen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000497:Alloys; D002857:Chromium; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D019736:Prostheses and Implants; D011859:Radiography; D013977:Tibia / Q000000981:diagnostic imaging*
chemical_list: D000497:Alloys; D002857:Chromium