He also is Co-Director of the Joint Replacement Program at the Cedars-Sinai Orthopaedic Center. Dr. Klapper is a leader in hip arthroscopy, a "keyhole" minimally invasive surgical technique. Currently, Dr. Klapper holds nine patents on the angled telescope and specially designed instruments used in the procedure. Dr. Klapper also designed a tool that is used when a hip implant has worn out over time and needs to be replaced with a new prosthesis. Dr. Klapper's invention produces an ultrasound frequency that reduces the cement to a chewing gum consistency facilitating the cement removal. Click here for more info on Dr. Klapper. Follow him on Twitter too.