When it comes to any type of dental restoration, there is always some risk associated with having this done. The most common complication that occurs is an irritation of the nerve. When a deep cavity is filled, there is always the possibility that a nerve has been irritated. This can result in a short-term sensitivity to hot or cold food. You can also experience some pain when biting down on a specific tooth. This pain is usually mild and will go away on its own over time. If not, then make sure to see the dentist.
The other potential complication can be weakening of the tooth structure. In any situation where a large amount of the tooth structure has either been lost or replaced with a filling material, the strength of the tooth overall may be affected. This will increase the chance that the tooth could sustain more damage over time when excessive force is placed on the tooth. Trauma or grinding your teeth at night could cause further damage.
Although both of these complications are possible, they are not extremely common. Talking about complications with your dentist before having any procedures performed is the best way to manage any potential problems and risk factors.