What are bitewings? Bitewing radiographs are a series of two or four radiographs taken to provide diagnostic information about posterior (back) teeth. When do I need bitewings? The standard of care is to take bitewing radiographs a minimum of one time per calendar year. A full mouth series, which includes bitewings and other radiographs, is taken a minimum of one time every 5 years. Why do I need bitewings? Bitewings provide diagnostic information about your teeth that cannot be obtained in any other manner. What happens if I do not get bitewings? Tooth decay between your teeth may go undiagnosed and untreated. It is always more conservative, less invasive, and less costly to diagnose tooth decay early when it has just started, and bitewings provide the information required