For partial dentures Both the syringe and the tray gels are two-phase alginates. Accu-Dent® has also developed special trays for partial denture impressions. They are anatomically shaped, autoclavable and allow perfect impressions. Thanks to the high precision of the impressions, the plaster models subsequently obtained are ideal for producing model casts, orthodontic work, etc. System 2 Accu-Trays The maxillary System 2 Accu-Tray represents a total rethinking of the standard upper impression tray. New features include Peripheral dam Buccal pouch gates Palatal flow channel The mandibular System 2 Accu-Tray is an extremely logical redesign of the stock lower impression tray for partial denture impressions.