Evaluation of the use of colour transparencies for scoring gingivitis

The effects of altering exposure, angle at which the exposure was made, magnification, type of flash, and the method of viewing, on scoring gingivitis from colour transparencies were evaluated. The results of this study suggest that, by using a standardised photographic technique, the scoring of gingivitis from colour transparencies is a valid procedure. However, many practical drawbacks arose, indicating that this method is not entirely satisfactory.