What is a tooth filling?.Dental filling in nairobi helps to restore damaged or decayed teeth back to their normal appearance and function as well as prevent further tooth decay.Tooth fillings strengthen and protect teeth with cavities.One of the most common and durable tooth fillings is amalgam (silver) fillings. Dentists have used this type of filling for many years.The most common treatment for a cavity is a tooth filling, which involves drilling a hole in the decayed tooth and filling it with silver alloy, gold, porcelain, or a composite resin. Another alternative to tooth filling is using dental crowns, in which the decayed portion of the tooth is removed and replaced by a crown made from gold, porcelain, or porcelain fused to metal