ACL injury
Can an ACL injury cause a popping sound?
Many patients hear or feel a pop at the moment of injury, but the absence of a pop does not rule out an ACL injury.
Read answer Patient education
Sports Medicine Q&A
Brief, easy-to-understand answers to common sports injury, treatment, and rehabilitation questions.
ACL injury
Does rapid swelling after a knee sprain suggest an ACL injury?
It can suggest bleeding in the joint or a more serious injury. Assessment should consider the injury mechanism, examination, and MRI.
Read answerACL injury
Can you still walk normally after an ACL tear?
Many people can walk, but may have instability, sudden weakness, or recurrent twisting injuries when turning, using stairs, or exercising.
Read answerACL injury
What does frequent knee giving-way mean?
It often suggests inadequate knee stability. Recurrent episodes may increase the risk of secondary meniscus and cartilage injury.
Read answerACL treatment
Does every ACL tear require surgery?
No. The decision depends on age, sporting needs, stability, associated injuries, and rehabilitation participation.
Read answerACL treatment
Who may consider non-operative ACL treatment?
People with lower daily activity demands, good knee stability, no major associated injury, and commitment to structured rehabilitation may be assessed for conservative care.
Read answerACL surgery
When is the best time for ACL reconstruction?
Surgery is generally planned after swelling has reduced, motion has returned, and strength has begun to improve. Prolonged delay may increase secondary injury risk.
Read answerACL surgery
Can ACL surgery be done while swelling remains?
Swelling should usually be controlled and motion restored first. Rushing surgery during marked inflammation and stiffness may increase postoperative motion limitation.
Read answerACL rehabilitation
Why is rehabilitation needed before ACL surgery?
Prehabilitation can reduce swelling, restore motion, strengthen the quadriceps, and improve gait before postoperative recovery.
Read answerGraft choice
Autograft or allograft for ACL reconstruction?
Autograft is common for younger, highly active patients; allograft is used in selected situations. Choice depends on age, goals, and physical condition.
Read answerGraft choice
How do hamstring and patellar tendon grafts differ?
Overall results are similar. Hamstring grafts use a smaller incision and may cause less anterior-knee discomfort; patellar tendon grafts have firm initial fixation but anterior-knee pain deserves attention.
Read answerACL rehabilitation
Can activity begin on day two after ACL reconstruction?
Many protocols begin quadriceps and range-of-motion exercises early after surgery. The exact pace should follow the surgical team.
Read answerACL rehabilitation
When can you walk normally after ACL surgery?
It depends on pain, swelling, strength, and any meniscus repair. Many patients progressively restore weight bearing and gait early.
Read answerACL rehabilitation
When can you start running after ACL surgery?
Jogging commonly begins at about three months after motion, strength, swelling, and movement control meet recovery criteria.
Read answerReturn to sport
When can contact sport resume after ACL surgery?
It often takes about six months or longer and should follow return-to-sport testing of strength, balance, jumping, and movement control.
Read answerACL surgery
What is the difference between single- and double-bundle ACL reconstruction?
Single-bundle reconstruction uses one graft. Double-bundle reconstruction recreates two ACL bundles, has higher rotational-stability requirements, and is more complex.
Read answerACL surgery
Is double-bundle ACL reconstruction better for high-intensity athletes?
It may be considered for professional athletes, contact-sport participants, or people with very high stability requirements; the decision is individualised.
Read answerHip conditions
Could unexplained hip pain be hip instability?
Yes. Recurrent groin pain, deep hip pain, or activity-related symptoms can warrant assessment for hip instability.
Read answerHip conditions
What tests are used for hip instability?
Assessment combines history, examination, and imaging. X-rays show bony structure; MRI can assess the labrum, cartilage, and surrounding soft tissues.
Read answerBone and cartilage repair
Can black phosphorus nanomaterials currently treat bone and cartilage defects clinically?
Current evidence is mainly preclinical, from cell and animal studies. More human research is needed on safety, efficacy, and standardised use.
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