The fluid helps control minor bleeding in the joint and washes away debris, which helps the surgeon see inside the joint. Signs Something Could Be Wrong with Your Meniscus. When you read a scale on the side of a container with a meniscus, such as a graduated cylinder or volumetric flask, it's important that the measurement accounts for the meniscus. What causes a meniscus in a graduated cylinder? You can either pick up the glassware to bring it to your level or else bend down to take measurements in situations where you're concerned with dropping the container or spilling its contents. Consult a medical professional because a meniscus tear may not heal properly on its own. BMJ. In the biology lab, we're probably not working with oil or milk, but we do work with other liquids, and measuring them correctly is just as important here as in the kitchen. Capillary Action - Meaning, Definition, Examples, Adhesion, Cohesion There are six types of meniscus tears: radial, intrasubstance, horizontal, flap, complex, and bucket-handle. The surgeon uses the arthroscope to look at the tear and decide what surgical technique to perform: Your surgeon inserts other surgical tools depending on the technique used. But it's not at all simple and plain and it is vital for all life on Earth. Why Do I Have Knee Pain When Going Up Stairs? This is typically done with a Wilhelmy plate.[2]. What Causes A Meniscus In Water? - TheAcademy.quest Someone from the anesthesia team will decide what type of anesthesia (pain control) you should receive: If you receive local or regional anesthesia, you may also be sedated to help you relax. Miller MD, Thompson SR. DeLee, Drez, & Millers Orthopaedic Sports Medicine: Principles and Practice (5th Edition). https://www.thoughtco.com/how-to-read-a-meniscus-606055 (accessed June 27, 2023). The medial meniscus rests on the inside part of your knee. Local anesthesia is a shot that numbs only your knee area. All rights reserved. How to Read a Meniscus in Chemistry. Trouble with anesthesia, such as problems with the heart or lungs. Recovery and rehabilitation take a few weeks. This is why liquids like water tend to form a concave meniscus chemistry instead of a flat one.. ACL Injuries in Young Athletes. 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Answer (1 of 3): Meniscus simply means the Concave or the Convex shape that the surface of liquids would take. Key points about torn meniscus. Fun Fact: The word meniscus comes from the Greek word for "crescent." A concave meniscus curves downward; if you are looking down from the top, it curves away from you, like the opening of a cave would. 2013;2(3):e257e264. And since water molecules like to stick together, when the molecules touching the glass cling to it, other water molecules cling to the molecules touching the glass, forming the meniscus. The outward curve is greater than the inward curve, the lens acts as a magnifier and has a positive focal length. I would definitely recommend Study.com to my colleagues. Surface Tension If liquids tend to adopt the shapes of their containers, then why do small amounts of water on a freshly waxed car form raised droplets instead of a thin, continuous film? Your healthcare provider may recommend low-impact activities rather than high-impact (such as walking rather than running). In contrast, an articular disk is a structure that completely divides a joint cavity. Nonsurgical Management of Knee Pain in Adults. Discoid meniscus is a congenital disability resulting in a meniscus that is thicker than usual and shaped like an oval instead of a crescent. As a result, the medial meniscus tears more frequently than the lateral meniscus. Get eye level with the meniscus. For instance, one study found that there was no clinically relevant difference between those who underwent a supervised 12-week exercise therapy program versus those who underwent surgery for degenerative medial menisci tears. However, the knee will swell and become increasingly painful over the course of a few days. When you are ready to leave, somebody else will need to drive you home. Share sensitive information only on official, secure websites. Kise NJ, Risberg MA, Stensrud S, Ranstam J, Engebretsen L, Roos EM. Bucket-handle meniscus tears are the most serious type of meniscus injury. However, because of tear type and blood supply, less than 10%of tears are actually repairable. In addition, it provides a cushion between your tibia and femur.. An error occurred trying to load this video. A meniscus tear results in pain in the front of the knee, either in the middle of the knee (from a medial meniscus tear, which is more common) or the side of the knee (from a lateral meniscus tear). The menisci are found on the medial and lateral sides of the knee. water molecules form hydrogen bonds with each other. water molecules repel each other. A concave meniscus occurs when the molecules of the liquid are more strongly attracted to the container than to each other. Surface Tension Surface Tension Surface tension is measured as the energy required to increase the surface area of a liquid by a unit of area. A healthcare provider will recommend certain steps to help the cartilage heal and reduce discomfort, such as: Physical therapy can help you recover from a meniscus tear by decreasing pain, strengthening and improving the flexibility in your knee, and increasing its range of motion. Common knee injuries. Overview What is the meniscus? 2016 Jul 20;354:j3740. It develops because of the surface tension of the liquid inside the container. (If you are relatively healthy, these tests are usually not needed.). Knee brace to stabilize the joint as you recover. Initial treatments for meniscal tears include rest, ice, compression, and elevation (R.I.C.E. The moral of this fictional tale is that it is important to read the measurement correctly, and yes, in the picture above,the true volume in the graduated cylinder is at the bottom of the water level21.7 milliliters, not 21.9. You may need to stop taking certain medications and not eat or drink for several hours before the procedure. The upside is that you can make lifestyle changes to decrease your risk of developing arthritis after having sustained a meniscus tear. She's TESOL certified and a National Geographic Certified Educator. In fact, the participants in the exercise therapy program had an improvement in thigh muscle strength compared to those who had surgerya positive outcome. A meniscus is a curved liquid surface that results from the interplay of adhesion (the liquid's attraction to its container) and cohesion (the liquid's attraction to itself). Loss of the meniscus places more of a burden on the cartilage surfaces of the joint, and they are more likely to develop wear-and-tear arthritis. Direct Instruction & Discovery Instruction: Definition & Differences, Lactic Acid Fermentation in Food | Overview, Bacteria & Products, Laboratory Techniques | Overview, Procedures & Examples. Anterior Cruciate Ligament (ACL) Injuries. Alcohol is more volatile than water. Consequently, you don't get that prestigious engineering job, where, 20 years later, you would have invented a new water-based chemical to allow rubber to grip better. e.g. Most of the time, non-surgical therapies are all that is needed to heal the meniscus. Cameron Tracy, Ling Xie, Irene Lym, Henry Li. 2023 Dotdash Media, Inc. All rights reserved, Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. American Academy of Pediatrics. When a liquid is placed on a smooth surface, the relative strengths of the cohesive and adhesive forces acting on that liquid determine the shape it will take (and whether or not it will wet the surface). Curve in a liquid's surface due to adhesion to the container walls, "Surface and interfacial tension | White Paper", https://en.wikipedia.org/w/index.php?title=Meniscus_(liquid)&oldid=1152442360, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 4.0, This page was last edited on 30 April 2023, at 07:42. (a.) Official websites use .gov In some cases, the meniscus appears flat (e.g., water in some plastics). 2014;5(5):597-602. doi:10.5312/wjo.v5.i5.597, Gupta Y, Mahara D, Lamichhane A. McMurray's Test and Joint Line Tenderness for Medial Meniscus Tear: Are They Accurate? Can a meniscus tear heal without surgery? It develops because of the surface tension of the liquid, which is defined as a property of liquid surface in which they behave in a cohesive and elastic manner. These can occur with a meniscus tear or independent of one. Capillary Action Examples Torn Meniscus | Johns Hopkins Medicine Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. If you want to try to strengthen your meniscus, you should exercise the muscles around it. With a meniscus tear, you'll likely experience some pain, stiffness, and swelling in your knee. Compress your knee with a brace or knee sleeve to prevent additional swelling. Create your account, 36 chapters | The chemistry definition of meniscus is the curve that exists on the surface of a liquid when it is placed into a container. A meniscus lens is a convex-concave lens in which one face curves outward, while the other face curves inward. (n.d.). It all depends on if the molecules of the liquid are more attracted to the outside material or to themselves. Radial tears are the most common type of meniscus tear. Thus, within liquid water, each molecule's partial positive charge is attracted to its neighbor's partial negative charge. A concave meniscus, which is what you normally will see, occurs when the molecules of the liquid are attracted to those of the container. Questions Tips & Thanks Want to join the conversation? In a surface tension measurement, the measurement probe has a contact angle of zero and the surface tension can be obtained by measuring the mass of the menisci. They are collectively called menisci or the meniscus. You may be able to bear weight on the injured leg at first. Sort by: Top Voted aryamurthy1 6 years ago Surgery to repair complex tears is not normally done because of their complicated nature. In agitated glasses of wine, droplets of wine seemingly "float" above the meniscus of the liquid and form "tears." Many return to normal activities within six to eight weeks. A concave meniscus (fillet) indicates three things: (a) there is good metallurgical . And similar to an ACL tear, they may occur in combination with a meniscus tear. Correctly reading the meniscus of a liquid is imperative for correct measurement. 3.2: Cohesive and Adhesive Forces - Chemistry LibreTexts Depth must be measured with the meniscus at eye level (to eliminate parallax error) and at the center of the meniscus, i.e. Get useful, helpful and relevant health + wellness information, 9500 Euclid Avenue, Cleveland, Ohio 44195 |, Important Updates + Notice of Vendor Data Event, (https://orthoinfo.aaos.org/en/diseases--conditions/meniscus-tears/), (https://orthoinfo.aaos.org/en/treatment/knee-arthroscopy/), (https://www.niams.nih.gov/health-topics/knee-problems#tab-overview), (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5994634/), (https://www.ncbi.nlm.nih.gov/books/NBK431067/), Presence of symptoms (pain, swelling, locking, buckling, etc). Meniscus injury and surgery are common, especially among people who play sports. Incorrectly measuring components of chemical reactions can result in unwanted consequences, like too much of one reactant still present at the end of the experiment. Meniscus (liquid) - Simple English Wikipedia, the free encyclopedia When you first tear your meniscus, you may not feel any discomfort. doi:10.5792/ksrr.2016.28.2.142, Kambhampati SB. Make appointments for physical therapy or a fitting for crutches. Even if your healthcare provider suspects a meniscus tear, they may first order an X-ray of your knee to assess for any bone breaks or other signs of knee pain, like osteoarthritis. Healthcare providers commonly see this type of meniscus tear on magnetic resonance imagining (MRI) performed on people in their 20s or 30s. We'll also look at ways to prevent meniscus damage so you can keep yours healthy and strong. A good way to remember this concept is to make the connection between adhesion and tape or glue, which are also called adhesives. The tube experiences a downward force of magnitude 2r, where is the surface tension of the liquid.[3]. A meniscus is the curved surface at the top of a column of liquid. RICE (rest, ice, compression and elevation). Learn about the meniscus of liquids as well as convex and concave meniscus. While you may presume that surgery is needed for the treatment of a meniscus tear, this is not usually the case. Where is the meniscus located? Injury to the anterior cruciate, medial collateral, or lateral collateral ligaments are often suspected. Get unlimited access to over 88,000 lessons. doi:10.4103/ortho.IJOrtho_247_17, Moulton SG, Bhatia S, Civitarese DM, Frank RM, Dean CS, LaPrade RF. Cohesive and Adhesive Forces is shared under a CC BY license and was authored, remixed, and/or curated by LibreTexts. What is a meniscus in science? My mom doesn't know Greek, but she sure knows the importance of a meniscus. The menisci attach to such parts of your leg tissues to help them stay in place when you move. Get you back to sports or other activities. The definition of meniscus is the curve that exists on the surface of a liquid when it is placed into a container. Case I: The Meniscus. This is because the adhesive forces between water and glass are strong enough to pull the water molecules out of their spherical formation and hold them against the surface of the glass, thus avoiding the repulsion between like molecules. This curve is either convex or concave. The circumferential compression stitch for meniscus repair. She didn't know the science behind it, but she was right on with her instructions. A complex meniscus tear means there is a combination of tear patterns. For instance, rain falls in droplets, rather than a fine mist, because water has strong cohesion, which pulls its molecules tightly together, forming droplets. The term meniscus comes from the Greek word for "crescent" because of its moon-like shape. The different meniscus functions in the knee joint include the following: The meniscus pads protect against osteoarthritis and hyaline cartilage degeneration. Helmenstine, Anne Marie, Ph.D. (2020, August 27). Surgery is usually considered if conservative treatment isn't working and/or you have a lot of pain and the pain gets in the way of normal daily function. Your GPA falls from 4.00 to 3.99 and you don't get into that engineering college program you wanted. A convex meniscus (sometimes called a "backwards" meniscus) is produced when the molecules of the liquid are more strongly attracted to each other than to the container. Plants and trees couldn't thrive without capillary action. When cohesive force is stronger than the adhesive force: concave up meniscus, water forms droplets on the surface. Any activity that causes you to twist or rotate your knee, especially when putting your full weight on it, can cause this common knee injury. Your healthcare provider will prescribe medications to help you manage the pain. If the flap causes the knee to catch, a surgeon can usually fix it without removing much tissue at all. American Academy of Orthopaedic Surgeons. A concave meniscus forms when molecules are more attracted to the container than they are to each other. Your care after surgery may involve: You will have some pain immediately after surgery and for several weeks, which is normal. Your healthcare provider will tell you when to schedule an appointment for follow-up.