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Can a fully torn ACL heal without surgery? The evidence may surprise you.

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You may have been told that if you rupture your ACL in your knee, it cannot heal and surgery is the only option.

Would you believe me if I told you that this may not always be the case?

I have compiled a list of a lot of compelling evidence that shows a fully ruptured ACL definitely can heal on its own, and furthermore can show similar functional results as ACL surgery in many instances.

Your body might just be a lot more resilient than you may realize.

Here I have compiled a list of 7 research articles and my brief summaries of them. It is VERY compelling data.

Authors: Filbay et al 2022

Title: Evidence of ACL Healing on MRI following ACL rupture treated with rehabilitation alone may be associated with better patient-reported outcomes: a secondary analysis from the KANON trial

Link: https://pubmed.ncbi.nlm.nih.gov/36328403/

Summary: MRI appearance of ACL healing after ACL rupture occurred in one in three adults randomised to initial rehabilitation and one in two who did not cross-over to delayed ACLR and was associated with favourable outcomes. 
Authors: Filbay et al 2023

Title: Healing of acute anterior cruciate ligament rupture on MRI and outcomes following non-surgical management with the Cross Bracing Protocol

Link: https://pubmed.ncbi.nlm.nih.gov/37316199/

Summary: After management of acute ACL rupture with the CBP (Cross Bracing Protocol) , 90% (of 80) patients had evidence of healing on 3-month MRI (continuity of the ACL)
Authors: Ihara & Kawano 2017

Title: Influence of Age on Healing Capacity of Acute Tears of the Anterior Cruciate Ligament Based on Magnetic Resonance Imaging Assessment

Link: https://pubmed.ncbi.nlm.nih.gov/28045756/

Summary: ~62% of 102 subjects showed healing of ACL 6 months post rupture without surgery, and with conservative management including bracing and rehab. 
Authors: Costa-Paz et al 2012

Title: Spontaneous healing in complete ACL ruptures: a clinical and MRI study

Link: https://pubmed.ncbi.nlm.nih.gov/21643922/

Summary: 14 out of 14 (100%) of subjects showed ACL healing at 2 year follow up and returned to their prior activity level. 
Author: Frobel et al 2010

Title: A Randomized Trial of Treatment for Acute Anterior Cruciate Ligament Tears

Link: https://www.nejm.org/doi/full/10.1056/NEJMoa0907797

Summary: 36 out of 59 subjects who did rehab only did not opt for surgery. 
Author: Previ 2023

Title: Spontaneous healing of a ruptured anterior cruciate ligament: a case series and literature review

Link: https://pubmed.ncbi.nlm.nih.gov/36738386/

Summary: The magnetic resonance imaging study at 6 months revealed an end-to-end continuous anterior cruciate ligament with homogeneous signal
Author: Fujimoto 2002

Title: Spontaneous healing of acute anterior cruciate ligament (ACL) injuries – conservative treatment using an extension block soft brace without anterior stabilization

Link: https://pubmed.ncbi.nlm.nih.gov/12029510/

Summary: MRI confirmed that 21 injured ACL out of 23 knees showed ACL healing after using extension block soft brace for 2-3 month. 74% were shown to be stable at 16 month follow up. And 26% went to get ACl surgery due to instability. 

If you have torn your ACL, surgery is NOT your only option.

Reach out if you want to learn more. Schedule your free Discovery Call here.

ACL and knee pain therapy
Written By Dr. Benji Toh

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