Partial extraction therapy: A review of the clinical and histological human studies

The preservation of the hard and soft tissues for superior esthetic and biomechanical outcomes has become an integral part of any treatment plan intended to replace a tooth intended for extraction. With the introduction of the four techniques that constitute the Partial Extraction Therapy (PET) concept; the preservation of the tissues is more promising than ever. This review collates the reports from 1942 up to 2020 on the Root Submergence, Socket Shield, Proximal Socket Shield, and Pontic Socket Shield techniques, stating the complications and modifications made since the innovation of each technique alongside the advantages and disadvantages. It was concluded that definitive protocols for implementing and evaluating the success of each technique are needed to ensure the long-term success of any treatment plan that includes a technique of the PET.