Introduction: Deep margin elevation is a technique that allows reestablishing the location of restorative margins to a coronal position, without the need for surgery using adhesive materials.
Objective: To review the literature on the deep margin elevation technique, materials used, advantages compared to crown lengthening and limitations.
Methodology: A review was carried out in the databases Scopus, PubMed and Google scholar with the keywords "DME", "deep margin", "margin repositioning", "cervical margin repositioning", "subgingival margin".
Results: The correct isolation, placement of matrices, adhesive technique and polishing are the basis of this technique; and in turn are facilitated using magnification. The most used materials are resin-based, the ideal adhesives are 2-step self-etching and although traditional composite resins are the most used, high-loading fluids show promising results. The absence of a recovery period and the fact that there is no affection of the periodontium if properly executed are its main advantages. Although this technique simplifies the restorative process, it is important to be aware of limitations such as a minimum distance of 2mm from the crest for its execution, the possibility of isolating and placing matrix, as well as the use of high quality materials.
Conclusion: Knowing and respecting the limitations of this technique, it is possible to manage lesions that before its adoption required surgical management without the need for a healing period and the option to take the impression or rehabilitate immediately.