INBDE (Integrated National Board Dental Examination) Practice Exam

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Which agent removes all unexposed/underdeveloped silver halide crystals during film processing?

Developer
Fixing agent
Washing agent
Hardening agent

The correct answer is: Fixing agent

The correct answer is the fixing agent. The fixing agent removes all unexposed or underdeveloped silver halide crystals during film processing. This step is crucial in the development of X-ray films as it ensures that only the parts of the film exposed to radiation are retained, resulting in a clear and accurate image. The other options are not correct because: - Developer is responsible for reducing the exposed silver halide crystals to black metallic silver, forming the image. - Washing agent is used to remove any residual chemicals from the film to prevent discoloration and deterioration. - Hardening agent is used to strengthen the emulsion gelatin on the film to prevent damage during processing and handling.