Risk factor analysis of tibial tunnel position for early failure of anterior cruciate ligament reconstruction

BACKGROUND: To study the effect of the positional relationship between the position of the opening within the tibial tunnel and the extension of the parietal line of the intercondylar fossa on early graft rupture after ACLR. METHODS: Patients were divided into three groups A, B, and C according to the positional relationship between the extension of the top line of the intercondylar fossa of the femur and the opening within the tibial tunnel, and risk factors related to the relationship between their age, sex, graft diameter, BMI, and graft survival of the affected knee and its position were analyzed and compared. RESULTS: The age, BMI, and gender of the patients in the three groups were not statistically significant; the mean graft diameter of the patients in the three groups was statistically significant, and the mean graft diameter size was statistically different between group A and group C, and between group B and group C. The mean graft diameter in group C was larger than that in groups A and B; the graft survival rate of the patients in the three groups was statistically significant, and the graft survival rate in groups A and C was higher than that in group B. Conclusion: The more posterior the position of the extension line of the top line of the intercondylar fossa intersecting the inner exit of the tibial tunnel, the more serious the impingement of the femoral intercondylar fossa with the graft, and the higher the early graft rupture rate after the reconstruction of the anterior cruciate ligament; It is not that the larger the graft diameter, the lower the graft rupture rate; the most effective measure to avoid early graft rupture is a reasonable tibial tunnel position to avoid the impingement on the graft.