Complex sentence: Increasingly used in dental radiography, digital X-ray systems use normal X-ray but new types of sensors (the part inside the mouth that detects the X-rays), instead of the photographic film used in traditional system.
Split into simpler sentences: Increasingly used in dental radiography, digital X-ray systems use normal X-ray radiation. X-ray sensors are used to obtain digital radiographies, instead of the photographic film used in traditional system.