title: Trends in total knee arthroplasty implant utilization.
abstract: The incidence of total knee arthroplasty (TKA) has increased alongside our knowledge of knee physiology, kinematics, and technology resulting in an evolution of TKA implants. This study examines the trends in TKA implant utilization. Data was extracted from The Orthopedic Research Network to evaluate trends in level of constraint, fixed vs. mobile bearing, fixation, and type of polyethylene in primary TKAs. In 2012, 88% used cemented femoral and tibial implants, and 96% involved patellar resurfacing. 38% of implants were cruciate retaining, 53% posterior stabilized or condylar stabilized, 3% constrained. 91% were fixed-bearing, 7% mobile-bearing. 52% of tibial inserts were HXLPE. TKA implant trends demonstrate a preference for cemented femoral and tibial components, patellar resurfacing, fixed-bearing constructs, metal-backed tibial components, patellar resurfacing, and increased usage of HXLPE liners.
authors.affiliation: School of Medicine, University of California, San Francisco, San Francisco, California.
authors.forename: Long-Co L
authors.initials: LC
authors.lastname: Nguyen
authors.affiliation: School of Medicine, University of California, San Francisco, San Francisco, California.
authors.forename: Mandeep S
authors.initials: MS
authors.lastname: Lehil
authors.affiliation: Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California; Philip. R Lee Institute for Health Policy Studies, University of California, San Francisco, San Francisco, California.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Bozic
mesh_terms: D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D001843:Bone Cements; D016208:Databases, Factual; D005269:Femur / Q000601:surgery; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D009985:Orthopedics / Q000706:statistics & numerical data / Q000639:trends*; D010329:Patella / Q000601:surgery*; D020959:Polyethylene / Q000737:chemistry; D011474:Prosthesis Design; D013977:Tibia / Q000601:surgery; D014481:United States
chemical_list: D001843:Bone Cements; D020959:Polyethylene
keywords: bearing; constraint level; fixation; implants; total knee arthroplasty; trends