Bethany Valachi, PT, MS, CEAS, is a physical therapist, dental ergonomic consultant, and author of the new book, "Practice Dentistry Pain-Free." She lectures internationally and is president of Posturedontics®, a company that provides research-based education and evaluates dental ergonomic products. Valachi is clinical instructor of ergonomics at OHSU School of Dentistry in Portland, Ore., and has developed exercise videos specifically for dental professionals. She offers additional resources to address trapezius myalgia on her Web site at www.posturedontics.com.