A free knee pain seminar is from noon to 1 p.m. Monday in the main conference rooms of Metroplex Hospital. Dr. Sandy Bidner will discuss osteoarthritis and new technologies in knee replacement. The seminar, sponsored by Metroplex Health System and Stryker, is free and open to the public. A light lunch will be provided. To register, call 888-787-9537) or go to www.aboutstryker.com/seminars.