Hi! Welcome to Healthcaremagic. I read your query. Wisdom teeth is usually considered less functional as compared to other molars. Rather in most people, the wisdom tooth either does not errupt or errupt incompletely and usually is removed. If your wisdom tooth is fully erupted and alligned, and if dentist suggest that a root canal treatment can be done in that tooth, i suggest you to go for treatment rather than extraction. This will maintain occlusion. Extraction is always a last option if no treatment works. But may require small surgery, stitches and few discomforts post extraction like paresthesia or pain. Wisdom tooth removal does effect majorly the allignment of other teeth. Decision depends fully upon sugestion of dentist after an x-ray of tooth as for root canal, there should be visible distinct canal identified in wisdom tooth. Hope the answer helps you. Thank you.