Design Comparison of the INBONE I Versus INBONE II Total Ankle System

Abstract

Level V: Expert opinion.

Comparison of First- and Second-Generation Fixed-Bearing Total Ankle Arthroplasty Using a Modular Intramedullary Tibial Component

“…Specifically, the new talar sulcus design is reported to have twice the coronal plane stability of the saddle design of the INBONE I. 9 In this series, however, we did not show any significant difference in terms of radiographic coronal plane stability between the first-and second-generation prostheses. The INBONE I prosthesis was not associated with a significantly higher rate of subsequent nonrevision procedures after the index ankle replacement.…”

Evaluating Component Migration: Comparing Two Generations of the INBONE ® Total Ankle Replacement

“…Finally, the tibial base plate was elongated to increase coverage in the anteroposterior plane without requiring additional mediolateral resection (20). With the increased surface area, the load will be more evenly distributed throughout the tibial plafond (20). Although the implant has evolved, several characteristics of the INBONE Ò I were preserved.…”

“…Additionally, the initial talar saddle design was exchanged for a sulcus design to increase coronal plane stability (20). Finally, the tibial base plate was elongated to increase coverage in the anteroposterior plane without requiring additional mediolateral resection (20). With the increased surface area, the load will be more evenly distributed throughout the tibial plafond (20).…”

“…The 2 points of fixation are presumed to increase axial stability (20). Additionally, the initial talar saddle design was exchanged for a sulcus design to increase coronal plane stability (20). Finally, the tibial base plate was elongated to increase coverage in the anteroposterior plane without requiring additional mediolateral resection (20).…”

“…The newer INBONE Ò II system includes 2 pegs with an optional central stem, in contrast to the single stem of the INBONE Ò I system. The 2 points of fixation are presumed to increase axial stability (20). Additionally, the initial talar saddle design was exchanged for a sulcus design to increase coronal plane stability (20).…”