case_images: PMC8616684_01
case_images: Preoperative lateral radiographs of the (a) left knee and (b) right knee.
case_images: CRIOR2021-1086625.001.jpg
case_images: PMC8616684_01_CRIOR2021-1086625.001.jpg
case_images: fig1
case_images: Plain radiographs of the left knee showed patella alta (Figure 1).
case_images: Fat-suppressed T2-weighted sagittal magnetic resonance image of the left knee shows rupture of the left patellar tendon.
case_images: CRIOR2021-1086625.002.jpg
case_images: PMC8616684_01_CRIOR2021-1086625.002.jpg
case_images: fig2
case_images: Magnetic resonance imaging (MRI) confirmed a complete rupture of the proximal patellar tendon (Figure 2).
case_images: Intraoperative view of the left knee (a) and final view of the augmented repair using an internal brace technique (b).
case_images: CRIOR2021-1086625.003.jpg
case_images: PMC8616684_01_CRIOR2021-1086625.003.jpg
case_images: fig3
case_images: The patellar tendon and extensor retinaculum were completely torn at the proximal portion (Figure 3(a)). The free ends of the suture tape were passed through a second SwiveLock suture anchor, and the suture anchor was fully inserted just lateral and medial to the tibial tubercle with the knee at 60  of flexion (Figure 3(b)).
case_images: The patient has regained full active extension at 1 month postoperatively.
case_images: CRIOR2021-1086625.004.jpg
case_images: PMC8616684_01_CRIOR2021-1086625.004.jpg
case_images: fig4
case_images: At 1 month postoperatively, full active extension could be achieved without an extension lag (Figure 4).
case_images: Postoperative lateral radiograph of the left knee at follow-up 12 months after the operation.
case_images: CRIOR2021-1086625.005.jpg
case_images: PMC8616684_01_CRIOR2021-1086625.005.jpg
case_images: fig5
case_images: At the final follow-up, 12 months postoperatively, he was symptom-free with a full range of motion, and he regained preinjury functional levels (Figure 5).