Hello.
In some cases of impacted wisdom tooth, the yooth is in close proximity to a nerve which makes the process of surgical extraction of the tooth uncomfortable and painful even after injecting local anaesthesia. In such cases we usually recommend the patients to undergo in general anesthesia so that the patient doesn't feel discomfort, the surgeon can perfom the surgical extraction properly and if any other wisdom tooth needs to be addressed then that can be done too in the same time.
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Can get an online consultation for evaluation of your xray