Surgeons and engineers constantly search for methods to improve the surgical positioning of implants used for joint arthroplasty. Rapid prototyping is being used to develop patient-specific instrumentation (PSI) and has already been successfully translated into large-scale clinical use for knee arthroplasty. PSI has been used in shoulder arthroplasty; however, it is not yet known whether PSI provides improved accuracy and outcomes compared with conventional methods in either shoulder arthroplasty or knee arthroplasty. In the hip, PSI has been limited to the positioning of custom-manufactured implants and a small number of surgeons testing the emerging solutions from different manufacturers. Early results indicate consistent accurate positioning of implants with the use of PSI in hip arthroplasty but with added costs and uncertain effect on clinical outcomes.
From Royal National Orthopaedic Hospital, Stanmore (RNOH), United Kingdom (Dr. Henckel, Dr. Holme, and Dr. Skinner), and University College London, United Kingdom (Dr. Hart) and Chelsea and Westminster Hospital Foundation Trust, London, United Kingdom (Dr. Radford).
Dr. Hart or an immediate family member has received research support from Zimmer Biomet, Corin USA, Finsbury, Mathys Ltd, Smith & Nephew, and Stryker, and serves as a paid consultant to DePuy Synthes. Dr. Skinner or an immediate family member serves as a paid consultant to and has received research or institutional support from Medacta, and serves as a board member, owner, officer, or committee member of the British Hip Society. None of the following authors or any immediate family member has received anything of value from or has stock or stock options held in a commercial company or institution related directly or indirectly to the subject of this article: Dr. Henckel, Dr. Holme, and Dr. Radford.