Tray Fabrication Step by Step
Step 1: Pour impression with fast-set plaster or dental stone. Pour alginate shortly after making impression to ensure accuracy. Trimming is less work if quantity of stone is kept to a minimum.Palate and tongue areas are not poured or should be removed after plaster has set. Allow model to dry two hours.
Step 2: For reservoir spaces, apply Ultradent LC Block-Out Resin approximately 0.5mm thick onto the labial surfaces. Stay about 1.5mm from gingival line. Do not extend onto incisal edges or occlusal surfaces.
Step 3: With vacuum former, heat tray material (Sof-Tray Classic Sheets) until it sags approximately 1 inch. Adapt plastic over mold. Cool and remove model. Cool and remove model from the vacuum former. Cut excess bulk of material away with serrated plastic trimmers.
Step 4: Use Ultradent Ultra-Trim Scalloping Scissors to precisely trim tray 0.25 to 0.33mm occlusal from gingival margin.
Step 5: Return tray to model; check tray extensions.Gently flame polish the edges one quadrant at a time, if necessary, with a butane torch. While still warm, immediately hold periphery of each segment firmly against model for three seconds with water-moistened gloved finger. If this over-thins the tray material, fabricate a new tray.
Step 6: Review enclosed instructions with patient to brush teeth and explain the process of loading the tray by expressing one continuous bead of gel approximately halfway up from the incisal edge on the facial side of the tray from molar to molar. Explain that this should use about 1/2 to 1/3 of a syringe.
Step 7: Place tray over teeth. Gently press tray to move gel into place. Pressing too firmly will force gel out of tray.
Step 8: Remove excess gel with a soft toothbrush.
Step 9: Clean tray with soft toothbrush and water. Remind patient to follow the whitening regimen you have established.