KNOWLEDGE GAINS: New methods should always be evaluated before implementation to ensure good care. There are no evaluated diagnostic methods that do not use ionised radiation (X-ray) for caries diagnosing of approximal surfaces in contact with another tooth. If DIAGNOcam in evaluation shows the same diagnostic accuracy as X-ray, this may reduce the use of dental x-ray for children. If DIAGNOcam is found to have poorer diagnostic accuracy, the method should be avoided as a caries diagnostic method in primary teeth. The latter is based on the fact that children should not be exposed to unnecessary examinations or interventions that do not result in health benefits.