A number of osteotomes, n, form a set of osteotomes, for use during a ridge expansion osteotomy to reduce alveolar stress and to reduce likelihood of a fracture, with each osteotome of the set having a conical working tip with a free end having a diameter ϕAn, and a working base ϕBn； a first osteotome, n=1, of the set has the working tip formed with a first diameter, ϕA1=Y, at the free end, and with a second diameter, ϕB1−X, at the working base, the second diameter being larger than the first diameter, X>；Y； and wherein for successive osteotomes of the set, the diameter at the free end increases as an alternate step and regressive step sequence, and the diameter at the working base alternately increases by a constant increment c, as a step function.
