Total Knee Arthroplasty — Hybrid Versus Cemented TKA Using the NexGen LPS Prosthesis
Citation(s)
Carlsson A, Björkman A, Besjakov J, Onsten I Cemented tibial component fixation performs better than cementless fixation: a randomized radiostereometric study comparing porous-coated, hydroxyapatite-coated and cemented tibial components over 5 years. Act
Huddleston JI, Wiley JW, Scott RD Zone 4 femoral radiolucent lines in hybrid versus cemented total knee arthroplasties: are they clinically significant? Clin Orthop Relat Res. 2005 Dec;441:334-9.
Nilsson KG, Kärrholm J, Carlsson L, Dalén T Hydroxyapatite coating versus cemented fixation of the tibial component in total knee arthroplasty: prospective randomized comparison of hydroxyapatite-coated and cemented tibial components with 5-year follow-u
Uvehammer J, Kärrholm J, Carlsson L Cemented versus hydroxyapatite fixation of the femoral component of the Freeman-Samuelson total knee replacement: a radiostereometric analysis. J Bone Joint Surg Br. 2007 Jan;89(1):39-44.
Comparing Hybrid and Cemented TKA Using the NexGen LPS Prosthesis
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
