If your jaw is routinely sore and stiff, or if it clicks and pops when you open or close your mouth, you may suffer from TMD, also known as temporomandibular joint disorder, or TMJ disorder. Our dentists have years of experiencing helping our patients who suffer from TMJ in Diamond Bar, California. Call Phillips Ranch - Family & Cosmetic Dentistry today to learn about our gentle, effective dental services and to schedule your next appointment with Dr. Merchant or Dr. Nghiem.