Why Wisdom Teeth Can Cause Trouble
Wisdom teeth are the last adult molars and often emerge when there is limited room at the back of the jaw. A tooth may remain completely beneath the gum, emerge only partly, or grow at an angle against the tooth in front. A partly erupted tooth can leave a flap of gum where food and bacteria collect. Inflammation or infection around this area is called pericoronitis and can cause pain, swelling, a bad taste and difficulty opening the mouth.
An impacted or awkwardly positioned wisdom tooth can be difficult to clean. Decay or gum disease may develop around it, and pressure or trapped plaque can contribute to decay or loss of bone on the second molar immediately in front. Wisdom teeth are also discussed in relation to crowding, but crowding alone does not mean that removal will be beneficial; tooth position, symptoms and the health of neighbouring teeth need to be considered.
A healthy, symptom-free wisdom tooth with no disease may be left in place and monitored at routine dental visits. Preventive removal is not appropriate for everyone. Extraction is more likely to be advised for repeated pericoronitis, unrestorable decay, damage to the adjacent tooth, certain cystic changes or another defined problem. The benefits of removal must be weighed against the difficulty and risks in each individual case.
