Background: Anterior cruciate ligament (ACL) injury is the most common ligament injury. The changes in motor and sensory behaviors after ACL reconstruction are due to the lack of proprioceptive information as a result of ACL lesions and/or ACL graft substitutes. Objectives: This study aims to determine the effects of proprioceptive and joint stability after ACL augmentation using joint position sense (JPS) and threshold to detect passive motion (TTDPM) as the indicators. Methods: This study was conducted using an observational study design applied to patients. The study design used was a cross-sectional study in two populations. The statistical test used was the Independent T-Test. Result: There was a deficit of 3.3±4.7 when JPS was tested at 30 degrees in the augmentation group and -3.6±3.1 at 30 degrees in the reconstruction group (p=0.013); -5.4±6.1 at 45 degrees in the augmentation group and -2.5±5.4 at 45 degrees in the reconstruction group (p=0.033); -4.4±7.5 at 60 degrees in the augmentation group and -3.6 ±5.0 at 60 degrees in the reconstruction group (p=0.02). On the other hand, in the TTDPM measurements related to the Golgi complex of the quadriceps muscle, there was a significant difference (p=0.011) at 6.5±2.4 in the augmentation group and 4.1±1.3 in the reconstruction group. Conclusion: This study shows that the effects of proprioceptive and joint stability after practicing ACL augmentation surgery are more effective than ACL reconstructive surgery as assessed by the JPS and TTDPM indicators.

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