Prosthesis-Implant Arch Area Ratio (PIAAR) - A New Geometric Paradigm, Replacing the Current 'A-P Spread' of a Cantilever in Full-Arch Implant Prosthesis: A Proof-of-Concept Experiment.

Compared to the preexisting anterior-posterior spread concept, a new prosthesis-implant arch area ratio seemed to be a more categorized, geometric, and perceptive modality of assessing the prosthetic cantilever in a full-arch implant-supported prosthesis, allowing a more systematic indexing of different full-arch implant clinical scenarios with greater specificity and consistency.