In the time before modern dentistry, wisdom teeth were essential. Lack of good dental hygiene led to extensive tooth loss. So when it came time for these third molars to emerge in the back of the mouth, there was plenty of room to welcome them. Today, dental technology is more advanced than ever, and adults are able to repair and keep more teeth than they were even only 50 years ago. The wisdom teeth, however, are now problematic. Often, removal is necessary to prevent problems, especially if they are impacted.