Patent ID: 8308727

Claim:
A device for insertion through a hole created in the floor of the maxillary sinus, the device comprising: a) a handle; b) an elongate mandrel extending from said handle, said mandrel having a distal end, a central axis, and a periphery and a length, said length not exceeding 30 mm; and c) a head mounted to said distal end of said mandrel, said head having an upper surface opposite a lower surface, said upper surface defined by a distal side of said head and said lower surface defined by a proximal side of said head, said upper surface extending radially outward relative to said central axis of said mandrel, said upper surface defining a groove recessed into said upper surface and offset from said central axis with an outer peripheral portion of said upper surface extending beyond said groove, said groove defining a hinge across said head that allows for deformation of said head so that said outer peripheral portion can flex upward about said groove relative to said mandrel, wherein, said head has a cross-wise dimension parallel to said groove not exceeding 3.2 mm and is realized from a material having a shore hardness d scale value in the range of 30 to 50.