Which statement about the storage of X-ray film stock is true?

The statement that old stock must be used first is accurate because photographic materials such as X-ray film can degrade over time. Using older stock before newer stock ensures that the films remain effective and produce high-quality images. This practice helps to minimize the risk of exposing patients to suboptimal imaging due to potentially deteriorating film quality.

Maintaining the proper order of use for film stock is crucial in a dental practice environment, as it directly impacts diagnostic accuracy and patient care. Ensuring that older materials are utilized first helps in managing inventory effectively and reduces waste from expired products. This principle also ties into general good practices in the medical field, where older supplies are often prioritized for use to maintain safety and reliability.