What initial step should be taken for a patient complaining of pain in a previously filled composite tooth?

The initial step of taking an X-ray, removing the filling, and restoring it with a temporary filling is appropriate because it allows for a thorough evaluation of the tooth and the underlying issues that may be causing the pain. An X-ray is essential for diagnosing problems such as secondary caries, periapical pathology, or other complications that might not be visible during a clinical examination.

By removing the filling, the dentist can directly inspect the tooth structure and the filling material for problems, such as decay or a compromised seal, which may lead to pain. Applying a temporary filling after this assessment not only prevents further damage but also alleviates any discomfort the patient may be experiencing while a more permanent solution is determined. This approach ensures that the patient receives immediate care while also setting up for proper long-term treatment based on the findings.

Other options, like referring to a specialist immediately or scheduling a follow-up appointment, may delay necessary intervention. Likewise, applying a desensitizing agent does not address the underlying issue causing the pain, which is crucial to resolve for the patient's dental health.