PMC6332648_01
(a) Patient with ocular defect. (b) Primary impression of the socket with alginate. (c) Secondary impression with polyether. (d) Split cast with wax pattern. (e) Wax pattern trial with determination of location of iris. (f) Putty index of iris button. (g) Dupliation of coroneal prominenece using clear acrylic auto polymerizing resin. (h) Wax pattern with corneal prominence. (i) Investing of wax pattern in the crown flask. (j) Finished ocular prosthesis with characterization. (k) Patient with finished ocular prosthesis in place
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F1
The enucleated socket was inspected to determine the depth and degree of mobility of the socket [Figure 1a]. Primary impression was made using ophthalmic alginate loaded into a 5-ml disposable syringe (without needle) [Figure 1b]. With custom tray in position, polyether impression material was injected, and the patient was instructed to make eye movement [Figure 1c]. The impression was taken out, and two-piece split cast mold was poured [Figure 1d]. The distance between these two marked lines was measured and transferred on the defect size to locate the position of iris over the wax pattern [Figure 1e]. A putty index of iris button was made using heavy-body elastomeric impression material [Figure 1f]. Once the resin was set, the pattern was taken out [Figure 1g]. This complete iris portion was now placed and adjusted, creating a space over the wax pattern on the location determined by the markings made on the forehead of the patient [Figure 1h]. The wax pattern was invested in a small flask (crown flask) and dewaxing was done in the conventional manner [Figure 1i]. To improve the characterization (e.g., simulation of the blood vessels) of the ocular prosthesis, acrylic threads/fibers were separated from the veined heat cure material [Figure 1j] (Trevalon HI, Dentsply). Postinsertion instructions were given to the patient [Figure 1k].