The last and third molars are wisdom teeth. If properly aligned and robust, they can be an asset, if compromised or distorted, they most likely need to be extracted.
When wisdom teeth expand horizontally, they may cause damage to adjacent jawbones, teeth, or nerves, and require to be removed. They may collect plaque and lead to decay. If they are caught in soft tissue they could allow bacteria to grow and create an infection, also known as an impacted tooth. This could be extremely painful. It is hard to brush your teeth and you're more likely to get gum disease with these teeth. One can also contact cranbrookdentist.ca/wisdom-teeth-extraction.html/ for tooth extraction.
The dentist will take regular X-rays of your teeth to see what's going on, if your wisdom teeth need attention he will let you know. Teeth that are misaligned or horizontal may need to be extracted before they cause problems.
This avoids a more complex and painful extraction later on. Wisdom teeth are easier to remove in younger people when the bone is less dense and not fully developed. Older people take longer to heal.
Like other teeth, wisdom teeth are easily extracted after the full eruption. If not, your dentist will advise you on a planned pre-extraction exam. If they are embedded in the gums and jawbone, you will also need to remove some of the bone. They will likely be removed in sections to minimize bone loss.