A dental device (10) for temporarily filling a toothless gap (50) following extraction of a tooth. The dental device is arranged so as to be located in a space between two adjacent teeth (30, 40) bordering, on each opposed side, the toothless gap. The dental device comprises a central block (11) and two arms (12, 13) located on opposite sides of the central block (11). The two arms (12, 13) are extendible between a retracted position and an extended position. Each arm carries, at a free end thereof, at least one support (14, 15) adapted for resting respectively on a surface of the adjacent teeth when the arms are in the extended position. The central block includes an adjusting mechanism (19) for moving the two arms into the extended position, and a lock (20, 21, 22) locks the adjusting mechanism when the arms are in the extended position.