6 Set-up for Alginate Alginate bowls Alginate spatulas Fresh, room temperature waterMeasuring scoops / water vialImpression trays (metal-perforated, rimlock) or disposable-perforatedCup of mouthwash and paper towelDamp paper towelLabeled ziplock bag
7 Measure alginate and water Maxillary arch:3 scoops alginate 3 lines water (room temperature)Mandibular arch:2 scoops alginate 2 lines waterWater is measured and dispensed in the plastic water measurer that comes with the materialsExcess water will weaken the final set
11 Mixing Alginate Put measured powder into rubber bowl Incorporate water gently until completely moistenedHold bowl in left hand and spatulate with right handUse a wiping motionSpatulate mix into creamy, homogeneous consistencyAlginate should be mixed for 60 secondsIncreasing the water temperature will shorten the mixing time!
12 Mixing Alginate Undermixing: Mixture will be grainy Model will have poor detail
22 Evaluate your alginate impression Smooth surface?Rounded periphery?Centered in tray?¼ inch depth in tray?No oral cavity debris?No tray showing?No torn or thin places?Good detail?AnatomyDistals of posterior molarsAll sides of teeth visibleRetromolar pads/ maxillary tuberosityMuscle attachmentAbnormalities? (tori, etc.)
23 Alginate Impressions – Rinsing of Impression with Water