Custom-made LINK Endo-Model with anatomically curved stem for a patient with severe native deformity of proximal tibia
Case Report: directLINK 1/2020
A 35-year-old male patient with a weight of 80 kg and a height of 160 cm presented at the Orthopedic Hospital Orton with a native deformity of the AP curvature of his proximal tibia, a subsequently extended extensor apparatus and a loosened tibial component of the prosthesis in situ – the latter being the reason for the revision.
Preoperative CT-based planning: front view
Preoperative CT-based planning: side view
The preoperative X-ray shows the prosthesis with the loosened tibial component in situ. A further advantage of the custom-made Endo-Model is that it can be produced on the basis of X-rays; a CT is not required.
Due to the severe mechanical imbalance and osteoarthritis, we decided together with the patient to ask LINK to provide a customized LINK Endo-Model with a curved tibial stem and lateralized femoral stem. We aimed to optimize the correction of the valgus angle, and thus enable the patient to walk without pain.
During follow-up examinations, the patient had a significantly improved gait pattern. The patient now walks pain-free.
After thorough 3D planning, LINK supplied a customized LINK Endo-Model, medium component size, with anatomically curved stems. The positioning of the implant was based on the implant in situ.
The tailor-made Endo-Model was implanted on June 10th. During follow-up examinations, the patient showed no complications and a significantly improved gait pattern without pain.
Implant design draft aiming to correct valgus angle (top, front view [4, 5], side view [6]). Femoral component (bottom, front view [9]; side view [10]). Note: The pin seen on the lateral side of the tibia was not implanted. Implant design draft, tibial component, curved, medium size, 6mm medial, front view (7), side view (8).
Postoperative X-rays show the custom-made LINK Endo-Model in situ; front view, side view.
Contact: Dr. Mikko Manninen Orton Orthopaedic Hospital, Helsinki, Finland