Introduction

ACL injuries are a common challenge, especially for those who lead active lifestyles or participate in sports. Often, surgery is needed to restore stability and function to the knee. One of the most important decisions after injury is choosing the right type of graft for reconstruction, as this can significantly affect how much pain you experience afterwards and how quickly you recover. In this article, we’ll compare the two most common graft choices—bone-patellar tendon-bone and hamstring tendon autografts—and share evidence-based insights to help you make an informed decision about your treatment.

Common ACL Graft Options Explained

The two main types of autografts used in ACL reconstruction are bone-patellar tendon-bone and hamstring tendon grafts. The bone-patellar tendon graft involves taking a strip of the patellar tendon—the strong band connecting your kneecap to the shinbone—together with small pieces of bone at each end. This graft then replaces the torn ligament. The hamstring tendon graft, on the other hand, uses strands from tendons at the back of your thigh. Both techniques are widely used in the UK and supported by orthopaedic guidelines for their effectiveness and safety.

It’s worth bearing in mind, especially in revision surgeries, expert advice to avoid certain graft types as the first choice. For example, “during the first revision ACL reconstruction, it is recommended to avoid the use of allografts and to consider slope-reducing osteotomies to avoid multiple ACL graft failures and improve patient outcomes.”

Patients treated at MSK Doctors benefit from care overseen by Professor Paul Lee, a highly respected cartilage specialist and ambassador for the Royal College of Surgeons of Edinburgh. His clinical expertise ensures that every treatment plan is tailored to the patient, following the best surgical practices available.

Understanding Post-Surgical Pain Differences

Pain levels after ACL surgery differ depending on the graft used. Research shows patients who have had a hamstring tendon graft often report less immediate pain compared to those with a bone-patellar tendon graft. This is because harvesting the kneecap tendon can cause soreness around the front of the knee, which can make activities like kneeling uncomfortable for some months. Hamstring graft patients may feel tightness or tenderness near the back of the thigh, but usually this pain is less severe.

Supporting this, recent high-quality research found that “ACL reconstruction using a semitendinosus (hamstring) autograft resulted in less donor site pain and morbidity, and improved knee flexor strength symmetry at six months.” This means patients had less pain where the graft was taken and better strength balance between legs compared to other graft types.

Of course, pain perception is personal and influenced by individual factors like activity level and pain tolerance. This is where experienced surgeons like Professor Lee play a vital role, ensuring that pain management is personalised and effective to support your recovery.

Recovery Timelines and What to Expect Long-Term

Recovery after ACL reconstruction isn’t the same for every graft. Hamstring graft recipients often experience a slightly quicker early recovery, thanks to less donor site pain. Many patients regain leg strength and flexibility within a few months, easing back into everyday activities. Those with bone-patellar tendon grafts may have a longer period of front knee soreness and stiffness, but these grafts tend to be very strong and durable over time. Regardless of graft type, rehabilitation will focus on restoring movement, muscle power, and knee stability through carefully guided physiotherapy.

Complications can occur with any graft choice. For example, bone-patellar tendon grafts have a higher chance of causing persistent front knee pain or discomfort when kneeling, while hamstring grafts can sometimes lead to hamstring weakness or stretching of the graft over time. Athletes who need to return quickly to high-impact sports such as jumping or pivoting often favour bone-patellar tendon grafts for their durability.

It is also important to understand that injuries to the meniscus—the cartilage “shock absorber” in the knee—are common with ACL injuries. One study noted, “these injuries impact around 100,000 patients a year and make up 10% to 21% of all meniscal tears,” with “meniscal root tears defined as soft-tissue and/or bony injuries within one centimetre of the meniscal insertion.” Proper diagnosis and management of such injuries are crucial for maintaining knee health.

When considering the risk of repeat injury, evidence shows patients who experience multiple ACL graft failures report poorer outcomes and more surgeries. Specifically, “patients with multiple ACL graft failures were associated with statistically significantly worse patient-reported outcomes and higher rates of subsequent surgery (73% vs. 14%).” Selecting the right graft and surgical approach is essential to minimise these risks.

At MSK Doctors, patients are supported by a multidisciplinary team including specialist physiotherapists who closely monitor progress and adapt rehabilitation plans. This hands-on approach encourages safe, confident recovery and helps patients regain full function.

Discussing Graft Choices with Your Surgeon

Choosing the best graft for you involves an open and honest conversation with your surgeon. Many factors influence the decision, such as your age, activity level, job requirements, medical history, and personal preferences. These discussions ensure the chosen graft suits your lifestyle and gives you the best chance for a smooth recovery.

Experienced surgeons like Professor Paul Lee use up-to-date research and their clinical judgement to offer tailored advice. One key point is that “prompt diagnosis and surgical intervention are needed to protect the knee from early arthritic changes.” This highlights the importance of timely and personalised care so you can make confident decisions about your treatment.

Summary

To sum up, the choice between bone-patellar tendon and hamstring tendon grafts affects the amount of pain you might experience after ACL surgery and your recovery timeline. Bone-patellar tendon grafts may cause more front knee discomfort initially but offer strong, durable results—often preferred by athletes. Hamstring grafts usually lead to less pain early on and faster return of leg strength. Ultimately, expert advice and a patient-centred approach, such as that offered by Professor Paul Lee and the MSK Doctors team, are vital to help you navigate your options and achieve the best outcome for your knee.

References

• Alsaleh, N., Alnasser, A., & Alqahtani, A. (2024). A case report of simultaneous tears of the medial and lateral posterior meniscal roots with an intact ACL graft. International Journal of Surgery Case Reports, 109971. https://doi.org/10.1016/j.ijscr.2024.109971
• Winkler, P. W., Wagala, N. N., Hughes, J., Lesniak, B., & Musahl, V. (2021). A high tibial slope, allograft use, and poor patient-reported outcome scores are associated with multiple ACL graft failures. Knee Surgery, Sports Traumatology, Arthroscopy. https://doi.org/10.1007/s00167-021-06460-8
• Lawless, A., Ebert, J. R., Edwards, P. K., Malik, S. S., Davies, P., & D’Alessandro, P. (2025). A semitendinosus with adjustable button graft construct in patients undergoing hamstring ACL reconstruction results in improved knee flexor strength symmetry and less donor site pain and morbidity: Outcomes from the DOSTAR randomized controlled trial. Knee Surgery & Related Research. https://doi.org/10.1002/ksa.12698