A surgical assisting instrument and device having an elongated rectangular u-shaped body with fasteners extending outward therefrom. The mixed alcohol comprises 65 to 99. A heat exchanger close-coupled to the gas-generator receives in a first conduit the discharged heated gas, and transfers heat to an adjacent second conduit carrying fuel exiting the cooling passages of a primary combustion chamber. At least a second tooth arrangement model is formed by rearranging at least some of the individual teeth relative to the frame.