Which technique for margin displacement involves removing the inner epithelial lining?

The technique that involves removing the inner epithelial lining for margin displacement is electrosurgery. This method utilizes electrical currents to achieve precise cuts and to effectively remove tissue, including the epithelial lining, from the gingival sulcus. By excising this layer, electrosurgery facilitates better access and visibility for the dental practitioner to prepare the margins for prosthetic restorations.

This technique is particularly advantageous for margin displacement because it allows for controlled and selective removal of tissue, which can result in improved margin adaptation for future restorations. It also reduces the risk of bleeding compared to other methods, making it a preferred choice in certain clinical situations.

Other methods listed, such as displacement past, braid cord impregnated with anticholinergic, and mechanical displacement, do not involve the removal of the epithelial lining in the same direct manner as electrosurgery; instead, they may rely on mechanical or chemical means to achieve tissue displacement without cutting through the epithelium.