crunching sound in knee after acl surgery

Doctors think that two factors cause the patellar clunk syndrome: the design of the joint implant (on the femoral side) and the patient's knee-flexion . The majority of time, when someone is feeling weird sensations after ACL surgery, its nothing to worry about. After the meniscus surgery, there is fluid buildup on the site of the operation, scar tissue swelling and stretching, weakened muscles in the knee, changes in knee tracking, and underlying knee arthritis. Although symptoms go away in about a quarter of patients, two patients require arthroscopic debridement to resolve them. interurban trail east lansing. If you have knee pain, it might be beneficial to massage the knee before doing any physical activity (I wrote an article on massaging the knee). It can become inflamed, which is known as patellar tendonitis, or it can tear. If the bones change shape around areas where stuff likes to move, for instance, the top hole I outlined earlier is by the IT band, then those bands might feel weird from time to time. While, working on the cross trainer, I have noticed that I get a lot of the knuckle breaking sounds from my operated left knee. And it was not arthritis (I had X-Rays, and a follow up arthroscopy for my meniscus confirming no arthritis)-. Can You Reverse Ageing Through Lifestyle Changes? Ligaments are a type of tissue that connects bone to bone in the knee joint. Our app for ACL rehabilitation has exercise videos to help eliminate or reduce this grinding sound of your knee after ACL surgery. While you are recovering, you may be able to make some home improvements that will benefit your recovery. You are lucky if you don't have pain. At Dr. Steretts practice with Vail-Summit Orthopaedics & Neurosurgery, painful crepitus is commonly a symptom of one of the following knee conditions: Osteoarthritis: Knee grinding is a common symptom of knee arthritis, a degenerative condition in which the cartilage in the joint has worn down and results in bone rubbing on bone. Surgery may not be able to alleviate joint pain. I tore my ACL last summer and had surgery in September. This proceeded to happen whenever I would deeply bend my knee, or straighten it from a deep bend. Following surgery, it may take months for full recovery. Most of the time, the area may be hurt, but we realize itll be ok. This is usually the result of swelling and healing, and it is normal. Regenexx is a non-surgical procedure for treating pain caused by the joints. These symptoms may be uncomfortable and irritating at first, but they usually resolve as the knee heals. Im going to describe sensations I, and people Ive worked with, have had. Dr. Steretts goal is to treat your painful knee grinding so that you can get back to doing the activities you love. Similar to joint swelling, a weak quadriceps muscle can cause the knee cap to track differently and may result in a crack or pop. There is a theory that popping sounds arise due to the air bubbles passingthrough the soft tissues and find their way around the kneejoint. An arthrosurgery, or a surgical procedure used to treat a variety of knee problems, is the most common way to treat knee problems. Is there any permanent cure for rheumatoid arthritis? This is why tendons might not feel like theyre gliding the same way. He is passionate about helping his patients achieve the best possible outcome and is committed to providing the highest quality of care. Thesound may be loud or soft but this is not indicative of thedegree of pathology. It is very simple to treat knee swelling. Symptoms of knee instability as risk factors for recurrent falls. Enter your email address to subscribe to this blog and receive notifications of new posts by email. over a year ago, bala There are many reasons for knee to feel loose or wobbly even after correctly done ACL. crutches, a cane, or a wheelchair should not be used for the first few weeks following surgery. When I woke up and felt the graft in my knee, I momentarily freaked out, thinking I was going to feel that for the rest of my life. Crunching noise in knee when squatting/extending knee. Many experts attribute the cracking sound of crepitus to the release of air bubbles between joints. It will take a while to get a handle on this. A locking is much more pronounced. She would shiver or recoil upon hearing it, then toss me into my lair until my ugliness had dissipated. How can pain due to systemic lupus erythematosus be treated? Have you talked to your doctor about it and find out if that was the case? It was as if I suddenly strained the hamstring, then it healed in five minutes (which means I didnt actually strain it). a knee sleeve, or pants will help. The clicking will eventually go away as the knee heals and the muscles and ligaments around it become stronger. I therefore feel that crepitus offers an opportunity to identify at-risk individuals. Exercising Just For A Few Minutes Daily Can Greatly Reduce Your Risk Of Chronic Diseases; Here's How. But lately i've been playing basketball, and I know it's unadvised, but i've been careful and haven't been running. OARSI guidelines for the non-surgical management of knee osteoarthritis. That is, Id be walking in a straight line, yet it felt like the leg was a good 12 inches wider than that line. Modern total knee designs with a smoother intercondylar box are associated with decreased crepitus. Sometimes, if implants were used although this is much less likely popping can occur with different knee movements. Your ACL isnt the only knee ligament that can get injured. 35 grams of butter to tablespoons; alexa and katie house. Thats the bottom side drill hole. This can happen because the ligaments may have been stretched or torn during the surgery. Words that people often use to describe the sound or feeling are "popping, snapping, catching, clicking, crunching, cracking, crackling, creaking, grinding, grating, and clunking." Knee. Loss of range of motion in your knee. This is the predominant cause of the random jolts, what the [insert thirty expletives] was that? moments. Following knee replacement surgery, it is critical that you avoid falling. Another reason may be that the ligaments in your knee are not as strong as they used to be. You might not be able to straighten your leg, and your kneecap may feel like its moving up into your thigh. This is the big way I know -for me- the nervous system is whats still off. Many peoples knees squeak or crack or even crackle, a phenomenon known as crepitus. now I also have a medium size lump just below my knee now, near my surgery scar, I don't know why, it doesn't hurt unless I really push kind of hard on it. Home treatment, Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. You should always consult a doctor if you have sustained clicking on your fingers. However, if you are in pain, your knee is swollen or deformed, or the sound starts suddenly after the knee has healed, call your orthopedic surgeon for guidance. Prepatellar bursitis is a common complaint of people who work on their knees or who engage in activities that risk blows to the knee. Does anybody know what this is or if it's normal? If you have no pain or swelling, you may be able to click and catch your knee, and it is most likely normal. over a year ago, cjhlambert Crepitus following surgery is quite common after knee replacement surgery on the knee joint. For example osteoarthritis, a common cause of knee pain and excess fluid around and in the joint, can develop if the cartilage in your knee wears down. When your ACL tears, you might feel or hear a pop in your knee, or feel like your knee has "given out.". (2010). The bone and cartilage beneath your feet may be damaged, resulting in pain. Blog: https://curovate.com/blog/?utm_source=YouTube_Yaren_link\u0026utm_medium=YouTube\u0026utm_campaign=link Follow us on Instagram: https://www.instagram.com/curovate/ LinkedIn: https://www.linkedin.com/company/curovate/ Facebook: https://www.facebook.com/curovate/ Mayo Clinic Minute: Who should be screened for colorectal cancer? What is the reason for the sound? Id bring the leg back, and it would go back. When you flex or straighten your knee the built up scar tissue is breaking up which creates the release, or pop. Knee grinding, also known as knee crepitus, is a rough crunching sound and sensation from the knee joint. Are my thigh muscles weak? If the medical treatment options are not satisfactory, the treatment of knee replacement surgery may be a viable option. You can include the following: You should seek medical attention as soon as possible from a qualified healthcare provider. This is the weirdest one. In this section, there will be instructions on how to prevent knee popping. It can be difficult to overcome when you pop your knee. The most common symptom for infants is difficulty with Mayo Clinic Minute: Do you have dry eyes? This again settles down with the right kind of exercises. Once every few days, maybe once a week, could be while walking around, getting up from sitting, something completely innocuous, Id get a WHOA! over a year ago, Kristeng6 I guess the two bones are rubbing against each other. 2005-2023 Healthline Media a Red Ventures Company. I went back to playing soccer in March of this year, but worked out a lot to build up my leg muscles before returning to play my senior year. Air bubbles seeped into the soft tissue around the joint that pop when the knee stretches or bends. Why do I get cuts on my frenulum during intercourse? What causes a crunching sound in the knees? Knee clicking after ACL surgery is a common occurrence. One of the hallmark signs of a tear to the anterior cruciate ligament (ACL) in the knee is a loud popping sound, which is usually followed by intense pain. For me, this required more than 3 years to resolve on its own- basically I had to stretch and massage the site to eventually cause the adhesion to 'break.' Keep working hard and do not be discouraged by the long road ahead; you will recover faster and fully. My belief here is were trying to get feedback on how the area is, to gauge a response. In general, knee replacement clicking does not indicate a problem. Although it may be annoying, it is not harmful and will eventually go away. Do not stop taking pain medication without first consulting your doctor. I have a similar sounding issue with my knee cracking as it is straightened. Your physical therapist can evaluate your knee to determine the source of your symptoms. A torn meniscus may require arthroscopic surgery to trim away damaged meniscus tissue or sew the edges of the torn meniscus together. Song SJ, et al (2018). Personally, my hunch is where the incisions occurred confused my nervous system. A replacement knee joint may loose, be dislodged, or fail to function as intended. I had to sit down for about 10 minutes, then I was fine. They give (trick) the brain a signal of Hey, the limb is here, and its ok. I bet thats what wearing pants can do. Joint pain is one of the most common complaints that patients have with their physicians. But it may be injured along with another ligament in the knee, so while you may hear a pop or a ripping sound if its torn, it could also be the sound of another ligament. The crunching sound from your knee is crepitus. As if the knee was floating in mid air. 3.1K views 1 year ago Curovate is an app for at-home physical therapy exercises following a knee replacement, ACL surgery, or injury or a hip replacement.Curovate also provides educational. It is also possible to experience pain following surgery in these areas of injury. However, this time frame can vary greatly depending on the individuals age, weight, and activity level. It was like this scene in Varsity Blues, but with a hell of lot more panic from Tweeder at the end: Part of my hamstring was cut to be used as the new ACL graft. This can occur as a result of the removal of stem cells that the knee requires to stay healthy, the removal of the ligaments that hold the meniscus in place, or the destruction of the tendons that support the knee. It can also be dangerous to endure knee crunching . This is due to the healing process and is nothing to be concerned about. This became so noticeable it grossed my girlfriend out. Worst case, with all the pants practice, I enter a new club. As my surgery legs foot hit the ground and swung to take the next step, I would feel as if my leg was actually 12 inches out to the side. Like SON OF A BITCH I CANT STRAIGHTEN MY KNEE!!!. In my knees case, the pants drown out the conversation in my head of Is that fluid in the knee? (Each of our knees has two rubbery pieces of cartilage to prevent any friction between the thigh bone and the shin bone. We are an online blog dedicated to providing comprehensive and accurate information about orthopedics and injury prevention. If ur ACL surgery is done after a gap from injury, your quadriceps muscles may be very weak , hence u May feel uncomfortable and weak while walking 3. There are a few reasons why this may occur. Whats Causing This Pain in the Back of My Knee? Our website services, content, and products are for informational purposes only. Your patellar tendon connects the top of your shinbone to the top of your kneecap. According to physical therapists, clicking normally occurs in three different ways. I imagine its what Wolverine felt like after his adamantium transplant. "When crepitus is painful, it may represent the sliding of an irregular, damaged or degenerated ligament. Meniscus Tear: If the meniscus is damaged in an area lacking blood flow or the tear is complex, it will need to be repaired via knee arthroscopy. After an ACL injury has healed, knee buckle usually stops. vinessa vidotto photos. Again a sizeable portion of the normal population also develop arthritis in the same patello femoral joint from mal alignment related overload, age etc. Musculoskeletal Issues Bone, Joint and Ligament Problems knee pop 6 months after ACL reconstruction By Guest | 42 posts, last post over a year ago Angelica Giron, MD answered this Post ACL (Anterior Cruciate Ligament) Surgery Complications Read more New Reply Follow New Topic Guest over a year ago Known as a meniscus tear, this kind of injury can generate a popping noise. Thanks for reading. That sounds like a pretty good lead. The patellofemoral joint where your knee cap meets your thigh bone, or femur is typically the source of knee crepitus. Do I need knee replacement surgery for crepitus? It may be you need more time and rehab, but it also may be that graft isnt doing its job. Hell. It might not eliminate the noise, but a cane might help you get around a little easier, too. Normal kind of clicking sounds in the knee-Clicking sounds can come from the patella-femoral joint, that's the joint between your kneecap and your femur. I prefer wrapping or pants.). Giving way is where the knee all of a sudden falls out from under you. Its quite annoying. The left thigh muscle is still weaker than the right one. Cartilage, the smooth, elastic tissue that covers the ends of bones, normally allows the bones to glide easily in the joint. MCL injury There are two ligaments on either side of your knee, called collateral ligaments. Patients with severe deformity, ligamentous laxity, prior reconstructive surgery etc are not candidates for custom knee replacement. A variety of different parts of the knee can be damaged during ACL surgery. Popping sounds may also be produced as a result of scarring, as scarring may stiffen. We hope that we can assist her in this case, where a hole had been drilled through her tendon. Sometimes it is just more evident after you have had surgery.2. You should see a doctor as soon as possible if you have prolonged, frequent clicking with pain and swelling. When the new joint is fully functional, it is critical to begin the process of moving it. Ive basically chalked this up to scar tissue in my knee. crunching sound in knee after acl surgery. We almost always, naturally, touch or rub that area. The clicking is the result of the scar tissue rubbing against the surrounding tissues. . However, crepitus is also known to occur when cartilagerubs on the joint surface when the knee joint is mobile. By five years post-op, this also disappeared. However, if your knee is experiencing pain, instability, or swelling, consult your doctor to avoid further damage. When the cartilage wears down, the joint may move in such a way that it pops. Its going to move under tendons, between ligaments, flush through fascia. Is my mother suffering from rheumatoid arthritis? Research from 2014 suggests that land-based exercise can help improve function and pain and that water-based exercise may also help with knee function. It is now 1 year after surgery, and this cracking sound has progressively gotten more pronounced. When you try to get up from the injury, you may feel the . If you have knee popping or other issues after knee surgery, you should consult with your doctor. Your doctor may recommend nonsteroidal anti-inflammatory drugs (NSAIDs) to help reduce the pain, or you may even be a candidate for corticosteroid injections. Normally its not very painful, unless I really hold my hamstring "strong". In this procedure, the surgeon will make an incision in the knee area and resurfacing with a knee prosthesis. Many people complain of crepitus in the knee joint, but most often it is harmless. While the popping sound may be loud, it isusually harmless. In the mean time, just imagine that fluid moving around your knee. If your knee makes a loud popping noise (or even a series of popping sounds), get it checked out right away. Knee popping after surgery Knee Popping After Surgery Causes of knee popping after surgery may be due to inflammation of structures within the knee. There is no single cause of ACL damage, and it can occur in a variety of places in the knee. 2 Responses Dealing with weird sensations after ACL surgery , Making your neck and shoulders feel better while typing. This was pronounced for a year. Welcome to Brandon Orthopedics! A doctor will perform a physical examination of your knee, taking note of any bruising, swelling, or other abnormalities that have developed. It is caused by the scar tissue that forms around the surgically repaired ligament. When left untreated, some knee conditions including osteoarthritis can lead to increasing pain, joint damage and, eventually, disability. ap2487 I had successful ACL surgery last july 11th, Answer: The crunching sound from your knee is crepitus. I get that popping too and I just hit the 7 month mark to my knowledge it is from scar tissue build up. These air bubbles then mix with synovial fluid andwhen the knee is bent, the bubbles burst and a crackingsound is heard. It can happen when the eye doesn't produce enough tears, or Colorectal canceris the second-leading cause of cancer death in the U.S. Colorectal cancercannot be totally prevented, but there are ways to lower your risk and Up to 10% of newborns are born with ankyloglossia, a condition more commonly known as tongue-tie. The lump is the size of a half dollar. Generally, it takes anywhere from 4-6 weeks for the knee to pop after ACL surgery. There is a very good chance that you had some issues around this joint even before the surgery and it is possibly completely unrelated to the surgery. During a torn meniscus operation, a camera and operating tools are inserted into the knee joint and fluid is applied to fill it. After having surgery to repair a torn ACL and meniscus, it is common for the knee to click when moving it. It is FREE! Do you know if they used the Calaxo screw for the hardware? Following meniscal surgery, swelling of the knee may persist for a few weeks. Knee crepitus typically happens when the knee is bent, such as when you are squatting, going up or down stairs, or rising from a chair. McAlindon TE, et al. Additionally, a repertoire of intraoperative techniques can be used intraoperatively to decrease the risk of post operative crepitus. There's no pain, other than general soreness. To help prevent additional knee problems, work on strengthening the muscles in the front of your thigh, called the quadriceps. It wus all fine but I noticed my knee has been making a cracking sound the past week. This is essentially the sensation ACL patients are most familiar with- the instability. post ACL surgery foot pain/tingling/numbness. I swear I can feel, with my hands, that expansion. A number of studies have shown that 90% of isolated ACL tears may not have been properly diagnosed or treated, due to the AC damage. crunching sound in knee after acl surgerythe renaissance apartments chicago. When you flex or straighten your knee the built up scar tissue is breaking up which creates the release, or pop. there is a noticeable bump on my knee. The graft is the new ACL put in your knee: Because I started rehab the day of surgery -which everybody should be doing!- I did some quad sets within hours after waking up. However, the disease progression can be slowed, and the symptoms can be treated. The RICE approach, which stands for rest, ice, compress, and elevate, is helpful for treating injuries at home, including knee injuries. When knee snapping or catching is painful, that is usually a result of scar tissue, a meniscus tear or a tendon moving over a bony prominence within the knee joint. It only makes the cracking sound if my knee is bent and im trying to straighten it. If your doctor advises you not to do so, you may resume your normal diet as long as you follow it. You can download our App from the links below:iOS link: https://apps.apple.com/app/apple-store/id1477712207?pt=120343561\u0026ct=YouTube_Yaren_iOS_Link\u0026mt=8Android link: https://play.google.com/store/apps/details?id=cura.com.cura\u0026referrer=utm_source%3DYouTube_Yaren__Android_link Website: https://curovate.com/?utm_source=YouTube_Yaren_link\u0026utm_medium=YouTube\u0026utm_campaign=link Check out our blog that contains other helpful videos and articles about recovery after knee or hip injury or surgery. I sprained my right knee that I had the surgery on this weekend, and this morning my husband heard a pop? Rest, ice, compression, and elevation can all be used to help reduce swelling and assist in the prevention, reduction, and elimination of swelling. A:The grating sound emanates from the knee cap joint. Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available. A tendon from the same knee was put to replace the ligament using arthoscopy. I have bought a cross-trainer and have been using it for about 5 minutes everyday in the morning at a slow and steady pace. Surgery may be necessary to repair some partially or completely torn ligaments. This can cause the ligament to become weakened, which may ultimately lead to the clicking sound. I don't know what happened. What is the reason for the sound? The doctor will continue physical therapy as long as you are unable to move freely without assistance. In the worst-case scenario, popping, swelling, and pain following surgery may indicate a new knee injury. Put Your Hands Together for National Hand-Washing Awareness Week. I swear the knee is bigger there as well. It is critical that you refrain from driving until your doctor permits it. Well go over why this can happen later on, but random jolts, feeling as if something just moved, are typical. This is the sound produced by the force of the metal and plastic components acting together to support the replacement knee. It is also important to maintain ahealthy weight to decrease stress on the knee joint. However, painful knee grinding is a sign of damage to the joint. It would happen maybe once every five sprint workouts. A tendon from the same knee was put to replace the ligament using arthoscopy. Swelling that starts immediately (but can start four to six hours after the injury) and lasts for two to four weeks. And do what exercises you can to strengthen the quad and hamstrings (body-weight squats, prisoner squats, crab walks, spider-man crawls). If crepitus is associated with pain or the knee joint catches,this may be due to a meniscus tear, scar tissue or a tendonpassing over a protuberant bony fragment. Pain and clicking can also occur as a result of plica inflammation. Swelling is common after ACL surgery and lasts three months. If someone doesnt have their left hand, but they look at their right hand in a mirror, the phantom limb often feels better. Q:I ruptured the anterior cruciate ligament (ACL) in my left knee 10 years back. When you have your body cut open in four places, drilled in two, have the inside of your knee and thigh sewed and cut off, shit's going to feel weird. Meniscectomy, on the other hand, has no effect on the size or shape of the meniscUS or the stability of the knee. 4 Rehab Exercises To Heal A Torn ACL Without Surgery, Anterior Cruciate Ligament ACL Tear Injury: Causes, Symptoms, Surgery, And ACL Recovery Time, Rehabilitation Exercises For ACL Tear Injury, An ACL Tear Injury Can Heal On Its Own: Why Surgery May Not Be Your Best ACL Treatment Option, 8 Ways You Can Self-Diagnose An ACL Tear Injury, 8 Lifestyle Steps You Should Take To Heal Your ACL Tear Injury, 10 Exercises That Help Arthritis Patients Improve Knee Mobility. over a year ago. If your anterior cruciate ligament (ACL) is damaged, you may require a reconstructive surgery. Youll probably experience some pain and swelling. If you develop other knee problems, however, you should see a doctor to have your knee evaluated. Pretty basic here. Whether thats a little nerve damage at the skin, I dont know. In some cases, this may make it difficult or even impossible to bend the knee. It did not hurt. This slowly lessened in frequency. Learn how to recognize and treat this knee condition with exercise or. It could be plica syndrome. The lump is the size of a half dollar. Additionally, getting treatment is important, as it may help you avoid other injuries down the road. I haven't had any major problems but at the same time I haven't worked a lot to bring the left thigh muscles back to its original shape. The is fluid in my knee? but there isnt. The fluid accumulation, scar tissue swelling and stretching of the tendon and ligaments, weakened leg muscles, changes in knee mechanics, arthritis in the preoperative stage, unstable knee joints, and inflamed inflamed plica can all contribute to knee popping after knee surgery. This did not happen with my first surgery when I went back so I am a little confused. You should have a balance of stretching, isotonic exercises and avoid overdoing them. For example, your patella (kneecap) might track just little differently, or the cartilage under your patellar might be a little soft. Ever heard a snap, crackle, or pop when bending your knee? Meniscus Tear: The meniscus is the c-shaped cartilage in the knee. Fighting Knee Pain With Corrective Exercises. Physical therapy, a knee brace, and crutches are usually the next course of action. Here's what you need to know as well as a chart. You may need some tests to determine the cause and the extent of the damage. If the knee locks on you, like you cant straighten it for a minute, red flags go up. Should I continue the exercise or not? There also is a reduction in knee flexion during stair ascent if there is crepitus after knee replacement surgery. Next, youll likely have imaging tests. Just wondering what it is. If it looks like it might be a meniscus tear, they might perform a McMurray test, which puts some stress on the meniscus to see how it reacts. I have debated going back to the doctor with fear it might be something where I might not be able to play the rest of the season. Youll feel pain, weakness, and perhaps numbness or stiffness. Joint pain can be caused by a variety of factors, including age, injury, arthritis, and other medical conditions. In these scenarios, the crepitus may occurwhile climbing a staircase, or sitting for a prolonged timewith the knees crossed. POST 2 MONTHS OF MY ACL SURGERY OF RIGHT KNEE, MY KNEE IS NOT GETTING STRAIGHTEN UP. Our team of experts, doctors, and orthopedic specialists are here to share their knowledge and experience with you in order to help you make informed decisions about your health and well-being. Also, to help prevent further cartilage damage and other knee injuries, avoid overloading the joint when your knee is bent. It is not unusual for clicking noises to occur, but it is usually not concerning. However, I do not have any knee pain. Show all. The pain can vary, depending on whether you stretch it or you actually tear it. Serving Suffolk County, Nassau County, Queens and Manhattan, New York. As the CCL tears further, the symptoms will worsen. Specifically when doing these two exercises, which stretch the hamstrings: If I went all the way, Id often feel the medial (inner) hamstring, again, where the graft was taken from, gently snap over my knee. crunching sound in knee after acl surgery. I havent had any clicking in my knee since day four after TKR surgery. An X-ray is often the next step, followed by an MRI scan, to get a better look at the ligaments and structures in your knee. The sound may decrease as muscles build up due to perhaps a rebalancing of the muscles but may not be abolished given that arthrosis has probably developed under the knee cap. (n.d.), Causes of a loud pop in the knee thats followed by pain, tear to the anterior cruciate ligament (ACL), injury to your posterior cruciate ligament (PCL), Treatment for the causes of a loud pop in the knee followed by pain, nonsteroidal anti-inflammatory drugs (NSAIDs), orthoinfo.aaos.org/en/diseases--conditions/anterior-cruciate-ligament-acl-injuries/, orthoinfo.aaos.org/en/diseases--conditions/arthritis-of-the-knee/, oarsi.org/sites/default/files/docs/2014/non_surgical_treatment_of_knee_oa_march_2014.pdf, orthoinfo.aaos.org/en/diseases--conditions/meniscus-tears/, onlinelibrary.wiley.com/doi/full/10.1002/acr.22811, orthoinfo.aaos.org/en/diseases--conditions/patellar-tendon-tear, ncbi.nlm.nih.gov/pmc/articles/PMC5851845/, arthritis.org/health-wellness/about-arthritis/where-it-hurts/when-knee-pain-may-mean-arthritis, Knee Noise: Crepitus and Popping Explained, What You Should Know About a Hyperextended Knee, How to Pop Your Knee Without Injuring Yourself.

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