When longterm, chronic exposure to radiation is kept below threshold levels, no perceivable adverse effect appears to be observable. When the exposure to the patient and the operator is minimized by simple techniques such as shielding the operator and distancing from the source of the x-ray, limiting exposure to the patient by using a lead thyroid collar and full lead body apron, fast film and proper dark room technique, the benefits are great. Proper technique in developing and processing films is also critical. When developing manually, a thermometer and timer should be employed at all times to prevent overexposure. Fresh solutions and clean tanks and developing equipment are also essential.
Automatic processing is an alternate, highly effective means of developing films.
The primary goal of the clinician when taking an intraoral radiograph is to produce a film of the highest diagnostic value while exposing the patient to the least amount of radiation. In addition, the procedure should be as comfortable as possible for the patient. For children, the technique should also be expeditious, in order to accomodate a characteristic low tolerance level for prolonged procedures. Radiation exposure time can be reduced with the use of E-type dental radiographic film, which was first introduced in 1981, and replaced in 1994 with an E speed film with an improved contrast. This newer type of film produces a high-quality image with good contrast, while reducing the exposure time by one half.