For a patient with a sharp mandibular ridge, a minimum pressure impression technique is most appropriate because it minimizes tissue displacement and avoids pain or injury to the thin mucosa over the sharp crest. This technique ensures a more accurate capture of the intact mucosa in its resting form, preventing distortion that can compromise denture fit and comfort. Other techniques that apply pressure risk causing soreness and resorption. Thus, minimum pressure impression protects delicate tissues while providing a stable foundation.

Reference: Prosthodontics: Principles and Management Strategies, Robert L. Jack Jr., 5th Edition.