Prosthetic restoration after coronoradicular resection: Mechanical behavior of the distal root remaining and surrounding bone

Purpose. This 3-dimensional finite element analysis evaluated: (1) the mechanical behavior of the distal root remaining after resection of the mesial root in a mandibular molar; (2) the consequences of the remaining distal root displacements on the bone; and (3) the role of the radicular post in the transmission of stress to the remaining root. Methods. Three-dimensional finite element analysis was performed. Results. The most reliable solution for the remaining root and surrounding bone consisted of fitting a conventional fixed partial denture with abutments on either side of the amputated root. The solution provided a single cantilever supported only by the residual root. Conclusions. This analysis makes it possible to quantify, in the model situation, the risks taken for each prosthetic option.