MOORESVILLE – Orthopedic surgeons Dr. James McDonald and Dr. David Hillsgrove will present new technology for painful osteoarthritis of the knee, MAKOplasty, the second and fourth Tuesdays of the month at Lake Norman Regional Medical Center, 171 Fairview Road. The next seminar is April 24 in community rooms A and B. Seminars are free, but registration is required by calling Tara Casper-Vitale at 704-660-4164 or Tara.Vitale@hma.com.