Reporting mechanism of possible adverse incident during the investigation will be held according to Medical Devices (MD) commercially available in the market, so it interprets and assumes the issue as applicable to assumptions in the Portuguese National Law (Article 22) 21/2014, of 16 April, calling up a mechanism for reporting any incidents inherent to medical devices or resulting from the use of medical devices. In this way, and considering the type of intervention to carry out in this research (restoration of very small extension of NCCL with dental adhesives), the medical devices (Adhesive systems) are not described in the literature and not known records for the occurrence of undesirable incidents, with interpretative effects as Serious or Unexpected "adverse incidents". However, and according to good clinical practice for clinical research, the reporting mechanism of Serious or Unexpected incidents (protocol version FHS-UFP-FFP-2014 April-19.07.2015) for this research are approved by CEIC (National Ethics Committee for Clinical Research (No.20150305; Approved at 3th August 2015), as followed: