D85SDP-200 (PRO2002) – Soft silicone gingivae with 28 screw-retained teeth. Use THIS model if you are taking impressions. Impression material will NOT adhere to the urethane tissue. Replacement teeth are guaranteed to fit identical to the teeth originally received with models making these the most predictable models on the market. Urethane gingivae (GUB) is recommended if using silicone impression materials.