The rebuilding of tooth due to one or more cusp is known as onlay. The onlay helps in ensuring that maximum restoration to the teeth takes place and it is restored to the normal functioning. The large benefit of undergoing onlay is that it lasts long for a longer period of time. The 3-D scanning is beneficial in this regard as it helps in giving a fair picture of the tooth. The scanned tooth analysis is done with utmost care by dentist. Further, dentist may go for final adjustment before bonding onlay into the desired space of the tooth. The patient can go for normal routine thereafter without any delay and maximum restoration of tooth takes place with the help of this treatment.