Getting an inlay or onlay usually takes two appointments. At the first appointment, your teeth are thoroughly cleaned, making sure to remove the damaged or decayed area of the tooth. To ensure proper fit and bit, an impression of your teeth is made and sent to the lab for fabrication. Your dentist will then apply a temporary sealant to the tooth and schedule your next appointment. During your second appointment, the temporary sealant is removed and your custom created inlay or onlay is placed onto the teeth, making sure it fits correctly. If the fit is satisfactory, the inlay or onlay will be bonded to the tooth with a strong resin and then polished for a smooth finish.