Why is radio-opacity an concern when using flowable resins?

The concern regarding radio-opacity in the use of flowable resins primarily revolves around its potential to interfere with the detection of caries beneath the restoration. Flowable resins that are not adequately radio-opaque may make it challenging for dental professionals to assess underlying decay using radiographic imaging. If caries are present beneath a restoration but are not visible on an X-ray due to inadequate radio-opacity, it can lead to undetected deterioration of the tooth structure. This could result in more advanced decay, complications with the tooth, or failure of the restoration over time. Thus, ensuring that flowable resins have proper radio-opacity is crucial for ongoing monitoring and maintaining oral health.