Some surgeons are making use of minimally invasive procedures employing specifically built surgical instruments and telescopes - these lessen the dimension on the incisions that are made. At times it is only made of metallic and a separate bit of plastic is inserted; this is named a cellular-bearing knee replacement. https://www.theorthopaedicandpainpractice.com/unlocking-the-mystery-of-knee-replacement-surgery-everything-you-need-to-know/