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. 2023 Mar 23;12(4):e491–e501. doi: 10.1016/j.eats.2022.11.032

Fig 4.

Fig 4

Two-dimensional sagittal computed tomography cut of a left knee through the center of the distal bone defect. Preoperative key measurements are performed for harvesting of a minimum 15-mm-long proximal patellar bone plug and ensuring an 8- to 10-mm “safety” bone bridge is remaining between the distal and proximal bone plug harvest sites. For this measurement, it is crucial to identify the deep insertion of the quadriceps tendon (yellow arrow) as the most proximal bony edge, which allows 5 mm or more of additional bone plug length compared to the superficial patella insertion of the quadriceps tendon (white arrow) and assists in avoiding cutting too distally when preparing the proximal patella bone plug.

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