Early Results of a Patient-Specific Total Knee Arthroplasty Implant Cast From a 3D-Printed Mold

Abstract

Background: The second generation of a custom total knee arthroplasty (TKA) implant cast from a 3D-printed mold was introduced into the market in 2012. The purpose of this retrospective study was to investigate short- to mid-term survivorship and complication rates of this novel implant. Methods: This study is a retrospective analysis of 314 TKA procedures (264 patients) performed by a single surgeon using a customized TKA from September 2012 to November 2015. Patient demographics, rate of implant revision, rate of reoperation for any reason, and rate of postoperative complications were recorded. Results: At the time of index surgery, the mean patient age was 64.7 years, and the mean follow-up duration was 3 years. At the final follow-up, implant survivorship free from revision was 98.1%, and survivorship free from reoperation for any reason was 92.4%. Conclusions: Our analysis revealed favorable short- to mid-term survivorship for a customized TKA implant. While the short- to mid-term outcomes for this implant are promising, future studies are required to assess long-term outcomes and durability.

Keywords

• Total knee arthroplasty
• Survivorship
• Custom implant
• Patient-specific instrumentation