ACL Reconstruction: Addressing Post-Surgery Instability - Orthopedics

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Laxity persists after anterior cruciate ligament reconstruction?


Hello Doctor: I sustained an injury on February 17, 2015, resulting in a torn anterior cruciate ligament (ACL).
I underwent reconstruction surgery using a bone-tendon-bone (BTB) technique on August 10, 2015.
After a period of rehabilitation, I noticed that my calf still experiences instability.
During a follow-up appointment, my original surgeon ordered another MRI and X-ray.
Throughout the rehabilitation process, I did not experience any further sprains.
The X-ray stress test indicated a displacement of 0.9 cm.
The MRI report noted a graft rupture.
However, due to work commitments, I left my hometown and have not had the opportunity to discuss this with my original surgeon.
I consulted a doctor in Taipei, who advised against resuming sports activities.
They mentioned that if I consider a second surgery, it would only restore about 60% of the original function.
This has left me feeling uncertain.
Should I continue seeking advice from an orthopedic surgeon, or is it possible to continue exercising through muscle strengthening?

Shi Tongxue, 20~29 year old female. Ask Date: 2016/12/06

Dr. Shi Guozheng reply Orthopedics


It is generally not recommended to undergo another surgery to strengthen muscle power if there is still looseness after the initial surgery; instead, focusing on muscle strengthening exercises is more feasible, as this can help reduce instability.

Reply Date: 2016/12/06

More Info


Dear Patient,
Thank you for sharing your concerns regarding your ACL reconstruction and the ongoing instability you are experiencing. It’s understandable to feel uncertain after such a significant injury and surgery, especially when faced with the possibility of further intervention. Let’s break down your situation and explore your options.

Firstly, it’s important to recognize that ACL (anterior cruciate ligament) reconstruction is a common procedure aimed at restoring stability to the knee after a tear. The use of a bone-patellar tendon-bone (BTB) graft, which you underwent, is a well-established technique. However, post-surgical complications can arise, including graft failure or instability, which seems to be your current concern.

From your description, it appears that your MRI indicated a graft rupture, which is a serious issue. The fact that you are experiencing a 0.9 cm displacement during the X-ray stress test suggests that there is indeed instability in your knee joint. This could be due to several factors, including the integrity of the graft, the condition of the surrounding ligaments, and the strength of the muscles that support the knee.

Regarding your question about whether to continue seeking orthopedic consultation or focus on muscle strengthening, I would recommend the following:
1. Consult an Orthopedic Specialist: It is crucial to have a thorough evaluation by an orthopedic surgeon who specializes in knee injuries. They can assess the current state of your knee, review your imaging studies, and provide a comprehensive understanding of your options. If your graft has indeed ruptured, surgical intervention may be necessary to restore stability.

2. Physical Therapy: While waiting for your orthopedic consultation, engaging in physical therapy can be beneficial. A physical therapist can help you strengthen the muscles around your knee, which can provide additional support and potentially alleviate some instability. Focus on exercises that enhance quadriceps and hamstring strength, as well as balance and proprioception training.

3. Activity Modification: Given the advice from the doctor you consulted in Taipei, it may be wise to limit high-impact activities that could exacerbate your knee instability. Instead, consider low-impact exercises such as swimming or cycling, which can help maintain fitness without putting undue stress on your knee.

4. Surgical Consideration: If it is determined that your graft has failed and you are still experiencing significant instability, a second surgery may be warranted. While it’s true that outcomes from revision surgeries can vary, many patients do regain functional stability and return to their desired activities. Discuss the potential risks and benefits of a second surgery with your orthopedic surgeon, as well as the expected recovery process.

5. Long-term Outlook: Understand that recovery from ACL reconstruction can be a lengthy process, and some patients may experience ongoing issues even after surgery. However, with appropriate rehabilitation and possibly further surgical intervention, many individuals can return to their previous levels of activity.

In summary, I encourage you to seek further evaluation from an orthopedic specialist while also engaging in physical therapy to strengthen your knee. It’s essential to address the instability to prevent further injury and to improve your quality of life. Remember, you are not alone in this journey, and there are options available to help you regain stability and confidence in your knee.

Best wishes for your recovery, and I hope you find the answers and support you need moving forward.

Sincerely,
Doctor Q&A Teams

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