Dental radiographs taken at your dental office are used to look for dental decay and to better view restoration margins. The radiographs we take at Westside Endodontics are done at different angles (than the ones taken at your dental office) to allow better visualization of overlapping roots. This is why we may require additional radiographs, even though it seems your dentist already took images of the same tooth.
We use digital imaging at Westside Endodontics, which has much less exposure time than traditional radiographs, resulting in 80% less radiation exposure to our patients. Digital images are also easier to store and transfer (when needed).