What is the primary advantage of replacing a conventional complete denture with a screw-retained implant-supported prosthesis?

The most significant advantage of implant-supported prostheses over conventional complete dentures is the prevention (or significant reduction) of alveolar bone resorption. Conventional dentures rest on the residual alveolar ridge and do not prevent bone resorption — in fact, the pressure from dentures can accelerate bone loss. Dental implants, by contrast, transmit functional occlusal forces directly to the jawbone through osseointegration, providing physiologic bone stimulation that maintains bone density and volume (similar to natural tooth roots). This preservation of bone is critical for long-term esthetics and facial structure. All other listed advantages (reduced mucosal load, improved stability, better esthetics) are also valid benefits but are secondary to bone preservation.