Patient-specific Total Knee Arthroplasty: A Novel Technique and Implant

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Although total knee arthroplasty (TKA) is an increasingly successful procedure, technical methods to improve implant alignment continue to evolve. Patient-specific jigs are gaining popularity as an efficient means to improve alignment and provide an alternative to conventional jigs and computer navigation. Patient-specific TKA implants combine use of these jigs with an implant, based on computed tomography imaging that tightly conforms to the patient’s unique 3-dimensional topography. Proposed benefits include decreased incidence of implant overhang and sizing issues, better approximation of osseous geometries, and improved soft-tissue tensioning with the theoretical benefit of more natural knee kinematics. We describe a technique for implantation of a novel patient-specific jig and TKA implant system and discuss benefits and potential critiques of its use.

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