A Balanced Arthroscopic Debridement of the Inner Layer of the Knee Retinaculum Increases the Tibiofemoral Joint Space Width

Figure 2

Custom instrument to measure the tibiofemoral joint space width using osseous phantoms for practicing. (a) Custom instrument. (b) Distal end of the instrument. (c) Arthroscopic measurement after debridement of a patient. (d) Setup for custom instrument analysis. A Kirschner wire linked the tibia to the femur, controlling the vertical tibial displacement. (e) A Vernier caliper was introduced vertically into the tibial phantom to measure different joint space widths. (f) Custom instrument used to measure the tibiofemoral joint space width, while the Vernier caliper also measures the same width for the Bland–Altman and test-retest analyses.