Does an Increase in the Tibial Slope Angle Increase the Risk of Anterior Cruciate Ligament Re-rupture?

Authors : Okan Ateş, Ahsen Oğul
Pages : 854-862
Doi:10.54005/geneltip.1647003
View : 121 | Download : 203
Publication Date : 2025-10-28
Article Type : Research Paper
Abstract :Backrounds/Aims: Despite the improvements in Anterior cruciate ligament recontruction (ACLR) surgery, results of revision surgeries are not satisfactory. Risk factors involved in ACLR are currently being studied to reduce re-injuries. In this study, the relationship between posterior tibial slope angle (PTSA) and rupture after primary and revision surgery was investigated. Materials and Methosds: Patients over 18 years of age who underwent primary ACLR (primary group), patients with re-rupture (revision group) and individuals without any ligament injury (control group) were included in the study. Knee joint images of the participants were obtained by retrospective archive search. The posterior tibial slope angles in the included knee radiographs were measured using the anterior tibial cortex method. Results: The study evaluated knee joint images of 124 patients in the primary group, 39 patients in the revision group and 100 participants in the control group. Intra-observer and inter-observer reliability of PTSA measurements was found to be appropriate. A statistically significant difference was observed between the mean tibial slope angle measurement of the control, primary and revision groups. (p=0,0001). It was found that the risk of primary anterior cruciate ligament (ACL) injury and ACL re-rupture for an individual with PTSA>11.4 was 7.6 times and 9.58 times higher, respectively, than for an individual with PTSA<11.4°. Conclusion: Higher PTSA was observed to be an anatomical risk factor for primary and secondary ACL injuries. Patients with higher PTSA should be evaluated for additional risk factors and slope-reducing surgeries should be applied to these patients when necessary.
Keywords : Ön çapraz bağ, Tibial eğim açısı, Greft yetmezliği, Rekonstrüksiyon, Revizyon cerrahisi.

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