An assembly for carrying out the maxillary sinus mucosa elevation in the dental implant surgery, (30b), and includes a rim portion of the flange-like (30c), elastic material each round head portion (30a), elongated tubular sleeve portion providing an assembly comprising a (30) comprising a balloon. It further provides (28) a balloon probe member having an axial portion having a diameter that is loosely fitted to the outer diameter of the balloon a tubular sleeve provided with a screw on the outer circumference (28b). The connector member (24), also is screwable (28) probe elements, and is connected to a flexible tube having a valve operable by hand (20). To inflate the balloon, for supplying the pressurized fluid through a flexible tube (22) pump (12).
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