Dental Fillings

Composite resin, or “white filling” is a desirable option to restore decayed teeth because it can match tooth colour and it is durable. It also relies on chemical bonding to adhere to tooth surface which means that less tooth structure needs to be drilled away for its placement. Amalgam, or “silver filling”, is a preferred filling material when moisture control is unachievable. It has a superior durability, lasting on average 10-15 years, and costs less compared to composite resin. However, amalgam has an unesthetic dark colour appearance and it can stain the teeth. Its metal properties of expansion and shrinkage often lead to cracking or fracturing teeth. In addition, more tooth structure may need to be removed for amalgam to be securely “locked” in during its placement. At Ridgeway Dental, we use tooth-coloured composite resin as a default filling material. In situations when alternative materials are better and more suitable, we will certainly discuss the options with you so that you are well informed.

After years of wear and tear, the margins of the fillings can become distorted. A gap will form between the edge of the filling and the surrounding tooth structure, and the filling will become leaky. It is almost impossible to keep a leaky filling clean. If left untreated, cavities can start to develop. Therefore, it is recommended to have defective or deficient fillings replaced to prevent cavities.