PSI Knee – Patient-Specific Instrumentation

Patient-specific instrumentation (PSI) refers to the creation of customized surgical tools and, in some cases, implants tailored precisely to a patient’s anatomy. These instruments enable millimeter-accurate implantation of a knee prosthesis.In certain situations, a custom-made implant may also be beneficial—or even necessary—to match the patient’s unique joint structure.
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This modern 3D technology helps the surgeon achieve highly accurate positioning of the prosthetic components and allows for precise realignment of the leg axis when required due to deformity or pre-existing joint wear. Using MRI and CT scans, the joint surface of the knee can be measured in three dimensions. Based on this data, “replacement parts” are created to fit seamlessly into the joint while preserving as much of the natural knee structure as possible.
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If a full knee replacement is necessary, the condition of the bone and surrounding ligaments must first be assessed. Based on this evaluation, we recommend the most suitable type of prosthesis for the patient.The 3D model is then used to guide the optimal fit and placement of the implant. Special components and surgical guides are produced using 3D printing technology. This method can simplify and accelerate surgery, especially in complex cases. Patient-specific implants are particularly useful when a patient’s anatomy deviates from the norm, allowing the prosthetic surfaces to be adapted more accurately to the natural joint structure.
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Procelsio Clinic has partnered with leading manufacturers worldwide since the early days of PSI technology and has many years of experience in applying this innovative method.