Participants’ selection
All participants were examined and selected based on the inclusion and exclusion criteria and informed consent was signed by all eligible patients participating in this clinical trial. The main complaints of the participants, as well as the teeth involved in this investigation, were diagnosed. The embrasure cervical to the interproximal contact that is not filled by gingival tissue is referred to as black triangles. For each participant mapping of the missed papilla was registered. All missed papillae in the esthetic zone (following inclusion criteria) were restored, and then a random selection of the restored missed papilla was included in the data collection (minimum one and maximum five).