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A Common Injury Among Athletes And Tear Their Anterior Cruciate Ligament

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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

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