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The aim of this study was to assess bone loss and thickness of the cut with the use of a burr in percutaneous hallux valgus surgery.Twelve blocks of saw bone were used. Cuts of same depth were made in each block with two different saw blades and a burr. Each block was assessed for bone loss and thickness of the cut.There was statistically significant (p<0.05) increased bone loss and thickness of the cuts with the use of a burr as compared to use of two different saw blades. The use of a burr resulted in threefold increased loss of bone material and fourfold increase in the thickness of the cut as compare to use of two different saw blades.The metatarsal shortening is a risk factor in percutaneous hallux valgus surgery with the use of a burr.