Introduction: A common injury among athletes is to tear their anterior cruciate ligament (ACL). People who tear their ACL’s need to have surgery in order to help them recover and have no long term effects. The surgery consists of implanting an Endo button to keep their knee in place while the body heals itself. For this project an endo button was designed with specific dimensions taking in consideration the maximum forces that will be acting on the button. Ten materials were analyzed and one material was chosen based on the analysis. The material has to be able to withstand the forces, be as small as possible, and not be hazardous to the patient. This report will explain the procedures and methods that were used in order to choose the material. Materials and Methods: 10 materials were chosen of various types from wood and metal to polymers in order to make sure that a material was not overlooked. Table 1. List of Materials Material Yield Strength (MPa) Ti 15Mo 5Zr 3Al 870 Lead 10 1060 Steel 485 Uranium Beta Annealed None Plutonium 275 North American Northern Red Oakwood 47 Aluminum 7075 T6 503.4 PEEK Aramid Fiber Filled 276 Denka LCS Z1050 None Arkema Group Plexiglass V825 Acrylic None Table 1 is a list of materials that were chosen to analyze. For each material their yield strength was found if they had one. If the material had no yield strength then it was listed as none. The first step in the selection process was to remove any materials that are hazardous to
10. The minerals shown in Figure 1.12 (p. 7 lab book) are fluorite and topaz that have been tested for hardness. Use the Mohs scale in Figure 1.11 (p. 7 lab book) to identify which is fluorite and which is topaz.
The anterior cruciate ligament, more commonly known as ACL, is the most common knee ligament injury. An ACL injury mainly affects athletes or those participating in athletic activities. Over the years, sports have become more popular which has led to an increase in ACL injuries. This increase led orthopedic surgeons to create many operations over the past fifteen years that reconstruct this ligament.
The ACL (anterior cruciate ligament) prevents anterior forward movement of the tibia off of the femur, as well as hyperextension of the knee. It provides stability to the joint and allows for a dynamic motion. It also helps the bending of the knee sideways toward the body.
Every Tuesday and Thursday, Dr. Alpert wakes up at 6:30 AM, which allows him enough time to brew his morning coffee and prepare for the day all before making his first cut in the operating room at 8:00 AM. He performs his surgeries at either Ashton Surgical Center in Hoffman Estates, IL on Tuesday, or at Algonquin Road Surgical Center in Lake In the Hills, IL on Thursday. “I typically have surgeries from eight in the morning to about two in the afternoon, which allows three to five patients per day depending on the procedure. Every time I have an ACL reconstruction, I turn on my some of my favorite oldies music to get me in the groove.” During a typical ACL reconstruction, Dr. Alpert scrapes out the old, ruptured ACL and swaps it with a graft that is most commonly obtained from the hamstring or the patellar tendon. “I prefer to use the hamstring, especially with women. The procedure classically takes about an hour and a half to complete, and the patient is able to start rehab the next day. With ACL tears being such a frequent injury among female athletes, particularly in non-contact sports, it is currently being researched just why that is.”
A torn ACL is a injury in which also is a torn anterior cruciate ligament in the knee. When someone tears their ACL they have to have a surgery to replace it. ACL injuries range from mild, such as a small tear, to severe such as when the ligament tears completely or when the ligament and part of the bone separate from the rest of the bone. A lot of the time some of the other knee ligaments or parts of the knee are also injured. This includes cartilage such as the menisci, or bones in the knee joint they also can be broken. Your ACL can be broken during sport activities. During an activity if your leg is planted firmly on the ground then hit by a heavy/large force it could tear the ACL. Some ways your ACL can be tore is by being bent backwards,
Each year, approximately a quarter of a million physically active young people experience an anterior cruciate ligament (ACL) injury, and seventy percent of these ACL injuries will be sustained while engaging in non-contact activities such as sudden deceleration while landing (Begalle et al., 2012). This type of injury is grossly detrimental not only on the occasion in which it occurs but also for the subsequent years to come. The majority of individuals who injure their ACL also go on to either, re-injure that same ACL, or injure the opposite knee. Furthermore, our bodies are put in tremendously vulnerable planes of motion during sporting events, especially during activities such as, basketball, football, or soccer. In this day
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Whenever an athlete participates in a sport, whether it be practice or a meet/game, they run the risk of injuring themselves. When it comes to basketball, Anterior Cruciate Ligament (ACL) injuries are common. ACL tears are more likely to occur in female basketball players as opposed to males. In basketball, speed, strength, and power are the most important physical qualities to develop. Sometimes an athlete may be lacking in certain areas which puts them at a greater risk for tearing their ACL.
If I could do-over one day I would choose May 5, 2015 of my junior year of high school. On that day I tore my anterior cruciate ligament (ACL) and it changed my life forever. Tearing my ACL affected me academically, athletically, and mentally.
With an ever increasing number of people becoming involved with athletic activities, there is an increasing number of injuries occurring which can be devastating for the individual. Most of the injuries that affect athletes occur in one of four structures in the human body: bones, muscles, tendons, or ligaments. Because ligaments attach bone to bone and play a major part in providing stability for joints, the major stabilizing ligament in the knee, the anterior cruciate ligament (ACL), assists in performing everyday actions of the human body including sitting, standing, walking, running, dancing, and participating in other sports. The injury that specifically affects this ligament is very serious and always
The anterior cruciate ligament (ACL) has limited range of motion, which leads to it being the most frequently injured ligament singularly (Ireland, 1999). This study was conducted to present the epidemiology on ACL injuries in female athletes (Ireland, 1999). Epidemiology is the part of science that focuses on the causes, effects, and patterns of disease and health conditions that occur in specific populations. The epidemiology in this article focuses on female athletes that have had a noncontact ACL injury playing either basketball or soccer (Ireland, 1999).
So on a scale from one to twenty, how many football players get injuries to be more specific, knee injuries. Well with all the people that get hurt is higher than expected and sometimes it can mess with their job if they don’t heal fast. Many football players in the past have gotten a lot of injuries.
This essay deals with the current treatments, rehabilitation procedures and onsets following anterior cruciate ligament (ACL) injuries. Within this essay, there will be information including the causes, characteristics, and symptoms of ACL injuries. Throughout the United States, there are estimated to be 200,000 ACL injuries per year with 100,000 of those injuries being treated through ACL reconstruction (Evans, Shaginaw, & Bartolozz, 2014). With a satisfactory ACL reconstruction outcome between 75%-97%. From the 10%-15% failure rate of ACL reconstruction, the primary fault is due to technical mistakes at 70% (Samitier, Marcano, Alentorn-Geli, Cugot, Former, & Moser,
The Anterior Cruciate Ligament also known as the ACL is deemed the most commonly torn ligament in the knee and can result from both contact and noncontact injuries. Most Anterior Cruciate Ligament injuries result from an extreme force on the lateral side of the person’s knee causing a valgus force which pushes the knee inward (Kisner & Colby, 2012, pp. 802-803). This injury to the side of the knee can also cause a “Terrible Triad” injury which also injures both the medial meniscus and the medial collateral ligament (Kisner & Colby, 2012, p. 803). Our textbook further states that “the most common noncontact mechanism is a rotational mechanism in which the tibia is externally rotated on the planted foot….this mechanism can account for as many as 78% of all ACL injuries” (Kisner & Colby, 2012, p. 803). If the person does not seek medical help with this injury they are susceptible to also injuring the remaining support ligaments as well. Patients usually present with joint effusion; possibly 25 degrees of flexion, joint swelling if blood vessels are involved, limited ROM, stress pain and instability along with quads avoidance gait patterns (Kisner & Colby, 2011, p. 208)
The ACL is one of the most common injuries today, but in the past it was rare to have this type of injury. Warren states, “Whereas in the 1970’s HSS performed about five ACL procedures a year, today that number is closer to 100,000 a year.” Today it is very common for teenage boys and girls to play the same sports. According to Department of Orthopedic Surgery at the University of California college, “ACL injury is most prevalent (1 in 1,750 persons) in patients 15-45 years of age.” The average person is more active in the age range of 15 through 45 so this is why the ACL injuries are more likely to happen within this age gap. Department of Orthopedic Surgery, also explains, “ACL injury has an annual incidence of more than 200,000 cases with