Inlays and Onlays are laboratory-manufactured fillings, that can be made of porcelain, gold or composite resin.
They are bonded to the tooth, effectively sealing the cavity and offering superior protection against future decay than a simple filling.
Onlays are similar to an inlay but cover the biting surfaces of a tooth, protecting the tooth from fracture.
These are generally used when decay or cracks have affected areas of a tooth that exclude general fillings as a restorative option.
Due to modern bonding techniques, inlays and onlays can be considered a great way to restore strength, function, and aesthetics to a tooth whilst preserving sufficient tooth integrity.