Dental Cavity and Fillings

Dental Caries, also known as tooth decay or a cavity, is a bacterial infection that causes demineralization and destruction of the hard tissues (enamel, dentin and cementum ) usually by production of acid by bacterial fermentation of the food debris accumulated on the tooth surface.

If the caries is in the Enamel, this is the ideal time for the patient to go for the filling. Here there are no symptoms of sensitivity with hot and cold.

If the caries has reached the Dentin, the patient still can go for the filling. Here the patient may or may not have the sensitivity with hot and cold.

Once the caries has reached the vital tissue of the tooth Pulp, the patient has to go for the Root canal Treatment, followed by the Crown.



Silver amalgam is an alloy of mercury with various metals used for dental filling. It commonly consists of mercury, silver, tin, copper and other trace metals. Silver amalgam became the dental restorative material of choice due to its low cost, ease of application, strength and durability.

Dental composite resins are type of synthetic resins which are used in dentistry as restorative materials or adhesives. Synthetic resins evolved as restorative materials since they were insoluble, aesthetic, insensitive to dehydration, easy to manipulate and reasonably inexpensive.

The main advantage of a direct dental composite over traditional materials such as amalgam is improved aesthetics. Composites can be made in a wide range of tooth colors allowing near invisible restoration of teeth. Composites are glued into teeth and this strengthens the tooth's structure. The discovery of acid etching (producing enamel irregularities ranging from 5-30 micrometers in depth) of teeth to allow a micromechanical bond to the tooth allows good adhesion of the restoration to the tooth. This means that unlike silver filling there is no need for the dentist to create retentive features destroying healthy tooth. The acid-etch adhesion prevents micro leakage; however, all white fillings will eventually leak slightly. Very high bond strengths to tooth structure, both enamel and dentin, can be achieved with the current generation of dentin bonding agents.

Silver Fillings
Composite Fillings (Tooth Colour)