Q4. Today, tears of the anterior cruciate ligament (ACL) are fixed surgically by either taking an autograft from surrounding tissue (e.g. hamstring, patellar tendon) or from a cadaver source. In the later part of the 20th century, there were discussions of using carbon fiber in ACL repairs. Obviously, this never came to fruition. There was cause for concern that prevented this technology from ever making it a mainstay in surgical practice (25 pts). a) Before investigating into why this technology failed, what are some ideas as to why this technology may be attractive? Explain your thoughts (5 pts). b) After reading through this mini clinical review (https://link.springer.com/content/pdf/10.1007/BF01577404.pdf?pdf=button), explain issues that arose from carbon fiber ACL implants in ~150-200 words. How did the industry change the implant to make it slightly better (10 pts)? c) Reference and write a summary (~150-200 words) on a new ACL implant technology using a novel biomaterial. Take most of the time in explaining the biomaterial that is used in the technology (10 pts).