Maxillary model with adjacent sockets (both maxillary central incisors) for immediate implant placement and immediate provisionalization. Two sockets with dehisence for different socket preservation techniques. Missing first right premolar with healed ridge. Socket in a first right molar, with apex at 2 mm from sinus (for Summer technique and simultaneous immediate implant placement), also distances from sinuses at the level of healed ridges at 6 mm (right sinus for Summer technique) and 2-3 mm (left sinus for Caldwell-Luc technique). Both sinuses with membrane.