Abstract: The present invention provides a kit for bone surgery comprising a chirurgical drill and a base frame for positioning of said drill on an anatomical part of a patient. The base frame comprises at least one guiding tube with a cylindrical inner surface of predetermined diameter and also comprises a longitudinal cutout for direct view of the drilling site. The kit further comprises a burr-ring with a cylindrical outer surface of predetermined diameter arranged to be placed around the chirurgical drill. The diameter of the cylindrical outer surface of the burr-ring is slightly less than the diameter of the cylindrical inner surface of the guiding tube such that the burr-ring and the guiding tube are at most in a two-degree of freedom relationship along the longitudinal axis of the guiding tube when the burr-ring is engaged in the guiding tube. The invention also provides a bone surgery method using the kit.

Abstract: According to this method, one makes a three-dimensional solid reproduction (12) of the anatomical zone of implantation and, from this reproduction, a drill assistance device (30) comprising a rigid base (35) provided with at least one drill guide (34, 38). According to the invention,—the three-dimensional solid reproduction (12) consists of a reproduction of an internal and peripheral portion of said bone structure, exempt, at least in the vicinity of each implant hole, from the surrounding non-osseous tissues and mucosa,—said rigid base (35) having at least one surface, called contact surface, adapted to be able to bear in contact with an external surface portion of the three-dimensional solid reproduction (12), and therefore also later in contact with a peripheral surface portion of said bone structure.