title: Early radiographic and functional outcomes of a cancellous titanium-coated tibial component for total knee arthroplasty.
abstract: BACKGROUND
  Various surface coatings have been developed over the past decades to enhance fixation of cementless total knee arthroplasty (TKA). BIOFOAM(®) (MicroPort Orthopedics Inc., Arlington, TN, USA) is a novel cancellous titanium surface coating intended to increase both initial and long-term fixation. The purpose of this study was to investigate the early functional and radiographic outcomes of this coating used in a TKA application.
  
  
  METHODS
  One hundred and four (104) primary TKAs in 85 subjects using BIOFOAM-coated tibial components were prospectively enrolled at four centers. Subjects were evaluated using Knee Society Scores and radiographic analysis at a minimum follow-up of 24 months.
  
  
  RESULTS
  Knee Society Scores and flexion were all significantly improved at final follow-up compared to baseline. Radiographic analyses were satisfactory, with no progressive radiolucencies and only a single subject presenting with a radiolucency surrounding a tibial component. There were two revisions in the cohort: one for instability following a ruptured lateral collateral ligament and one for recurrent tibial insert dislocation.
  
  
  CONCLUSIONS
  This is the first study to report clinical outcomes associated with the BIOFOAM coating used in a cementless TKA application. Early functional scores and radiographic analyses are promising, but further investigations are needed to confirm long-term clinical success with these components.
authors.affiliation: Orthopedic Specialists of Louisiana, Shreveport, LA, USA.
authors.forename: D D
authors.initials: DD
authors.lastname: Waddell
authors.affiliation: MicroPort Orthopedics Inc., 5677 Airline Rd., Arlington, TN, 38002, USA.
authors.forename: K
authors.initials: K
authors.lastname: Sedacki
authors.affiliation: MicroPort Orthopedics Inc., 5677 Airline Rd., Arlington, TN, 38002, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
authors.affiliation: MicroPort Orthopedics Inc., 5677 Airline Rd., Arlington, TN, 38002, USA. david.fitch@ortho.microport.com.
authors.forename: D A
authors.initials: DA
authors.lastname: Fitch
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D013977:Tibia / Q000601:surgery; D014025:Titanium
chemical_list: D014025:Titanium
keywords: ADVANCE; BIOFOAM; Cementless fixation; Total knee arthroplasty; Total knee replacement