Feb. 21, a free lecture on joint replacement will start at 7 p.m. at the Hopkinton Senior Center, 28 Mayhew St., Hopkinton. Learn about the latest technological advances in joint replacement with a focus on surgical treatment for arthritis of the hip and knee, and also learn information on the steps for peri-operative care. Please RSVP by calling 800-439-4441 ext. 110. To view Hopkinton Drug's full lecture series, visit www.rxandhealth.com.