| Objective: To investigate the clinical value of three-dimensional computed tomography on postoperative evaluation of bone tunnel after anterior cruciate ligament reconstruction under arthroscopic assistance. Methods: Fifty-eight patients with anterior cruciate ligament injury who received the treatment from January 2014 to August 2014 underwent anterior cruciate ligament reconstruction under arthroscopic assistance. The femoral end was fixed using an Endobutton, and tibial end was fixed using absorbable interference screws. 58 knees from patients were scanned respectively by means of a dual-source CT scanner. A three-dimensional model of knee was rebuilt on a CT image post-processing workstation to reproduce the medial wall of the lateral femoral condyle and reconstruct single-bundle anterior cruciate ligament, tibial plateau and bone tunnel. The cases that had a Lysholm score ≥ 80 points were included in the excellent and good group and those who had a Lysholm score < 80 points in the poor group. The relative position of the center point of the femoral and tibial bone tunnels were marked and measured and the position relation between the two center points was estimated. Results: Three-dimensional computed tomography reconstruction method clearly reflected the situation of bone tunnel and its entrance, fixtures and grafts after anterior cruciate ligament reconstruction. There was significant difference in the center point of femoral tunnel of the knee on the operated side between excellent and good group and poor group(P < 0.05). There was no significant difference in the center point of the tibial tunnel between these two groups(P > 0.05). Conclusion : These results confirmed that three-dimensional computed tomography can clearly reconstruct the images of bone tunnel and anterior cruciate ligament grafts after operation, which can be used clinically to assess the relationship between bone tunnel location and graft misshaping. |
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