Tooth decays can be not only painful, but can lead to teeth loss as well.Tooth filling and dental crowns are the two preferred choices carried out to prevent these tooth decays. Dental filling is generally preferred when the tooth decay is confined only to a small area, whereas in case of excessive decay dental crown is the best idea. Compared to teeth fillings, dental crowns are long lasting and more durable. You need to consult a dentist to check the level of decay in your teeth. Based on the initial consultation, a doctor can recommend whether your teeth need dental crowns or a simple composite filling is the right option.