Evaluation of the manual staining methods of the iris of ocular prostheses

Vol. 12 – Number 48 – 2021 INTERDISCIPLINARY NOTEBOOK Original article Page 115-122 Evaluation of the manual staining methods of the iris of ocular prostheses Maria Tereza Martins Perez¹ Ricardo Caputti Izquierdo Indalecio¹ Francisco Pantoja Braga Filho² Francisco Pantoja Braga³ Cristiane Maria Brasil Leal³ Brigitte Nichthauser³ Abstract The individual who has lost the eyeball can be rehabilitated with an ocular prosthesis that needs to be natural and aesthetic. However, methods of staining and characterization of the iris during laboratory processing can lead to staining of the sclera leading to the failure of the work. This research aimed to identify the laboratory processing protocol that presented the lowest sclera staining after the iris staining of the ocular prostheses. Forty specimens were made with three different techniques and a control group. The ink from the iris caps, manually painted with automotive paint, was isolated from the self-curing acrylic resin used to glue them to the specimens. The three bonding and isolation techniques were with cyanoacrylate, PVA glue, and adhesive tape. Fisher’s exact test was used to evaluate the staining in two moments: after gluing the iris caps to the specimens and after acrilization of the final transparent layer. The staining indexes in the first analysis were 90% in the control group, 90% in the cyanoacrylate group, 80% in the PVA glue group, and 40% in the adhesive tape group. In the second moment, 90% of the control group presented staining, 90% of the cyanoacrylate group, 80% of the PVA glue, and 70% of the adhesive tape group. Fisher’s exact test presented for the cyanoacrylate p=0.7 groups; PVA p=0.5, and adhesive tape p=0.2. In the three techniques used, the staining indexes were high, which suggests the need for further studies and improvement regarding staining and insulation techniques and/or materials. Descriptors: Artificial eye, iris, esthetics, rehabilitation. ¹ CD – UEA. ² CAD/CAM specialist (TPD). ³ Department of Total Prosthesis and Bucomaxillofacial – UEA. DOI: 10.24077/2021;1248-115122