Patent ID: 7695279

Claim:
A set comprising: several drill stop sleeves designed to be fitted onto dental drills of different bore diameters and which have different lengths and different sleeve diameters corresponding to the bore diameters; the drill stop sleeves being held in blisters that have a separate receiving recess for each drill stop sleeve, each blister comprising several drill stop sleeves of equal length and a drill stop sleeve of each sleeve diameter; an assembly block for assembly and disassembly of the drill stop sleeves onto and from the dental drills, respectively; the assembly block having, for dental drills of each bore diameter, a circular cylindrical assembly recess with a slightly greater diameter than the bore diameter and limited at one end by a base that forms a limit stop for the dental drill, the depth of the assembly recess being smaller than a minimum drilling depth, the minimum drilling depth being defined by a distance of an abutment surface of the longest drill stop sleeve mounted on the dental drill from a drill end of the dental drill; and the assembly block having, for dental drills of each bore diameter, a circular cylindrical disassembly recess with a slightly greater diameter than the bore diameter and whose depth is greater than a maximum drilling depth, the maximum drilling depth being defined by a distance of an abutment surface of the shortest drill stop sleeve mounted on the dental drill from the drill end of the dental drill.