Modern dentistry nowadays is concerned with minimally invasive approaches in multiple specialties concerning the normal biology of human nature and cost-effectiveness. The nature of the teeth is attached to the supporting bone by many layers with biological dimensions for every part, these dimensions vary between different literatures This study aims to assess the survival rate of the deep margin elevation technique among teeth with sub-gingival defects restored with composite resin or glass ionomer. A systematic review was designed with an extensive search to answer the PICO question "Is the deep margin elevation reliable and have long longevity? By using PubMed, and Google Scholar with keywords. We included 22 Publications from 2013 to 2022 In the English language of aggregated literature in this systemic review. In conclusion, the DME technique may be a good alternative for the treatment of mutilated teeth with deep margins according to the literature evidence that we have.
