© 2016 American College of Prosthodontists. Space analysis for retentive components is a critical part of a treatment plan for an implant-retained prosthesis. This article describes a technique to evaluate the retentive component space between the mucosa and intaglio surface of a removable prosthesis. This technique uses a silicone mold to represent the relieved space. Two silicone matrices are fabricated over the silicone space replica as a reference for selecting or fabricating retentive components for the implant-retained removable prosthesis.