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Ankle Joint

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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Early Clinical, Radiographic, and Patient-Reported Outcomes of the Infinity With Adaptis Total Ankle System.

Allison L Boden¹, Kira Lu², Emily Teehan²

¹University of Louisville, Department of Orthopaedic Surgery, KY, USA.

Foot & Ankle International

|November 27, 2025

Summary

This summary is machine-generated.

The Infinity with Adaptis Total Ankle Replacement shows good early results, with 95.8% implant survival at 2 years. Patients experienced significant improvements in pain and function, though tibial lucency was noted in 28.2%.

Keywords:

ankle arthritis outcome studies total ankle arthroplasty total ankle replacement

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Area of Science:

Orthopedic Surgery
Biomedical Engineering
Implantology

Background:

The Infinity with Adaptis Total Ankle System is a fixed-bearing implant introduced in October 2019.
This study evaluates the initial clinical and radiographic outcomes of this specific total ankle arthroplasty (TAA) system.

Purpose of the Study:

To assess the early performance of the Infinity with Adaptis Total Ankle System.
To report clinical and radiographic results at a minimum two-year follow-up period.

Main Methods:

Retrospective review of 71 primary total ankle arthroplasties using Infinity with Adaptis implants.
Analysis of complications, reoperations, and revisions.
Radiographic assessment of alignment and periprosthetic changes.
Evaluation of Patient-Reported Outcomes Measurement Information System (PROMIS) scores preoperatively and at 1 and 2 years postoperatively.

Main Results:

95.8% implant retention (68/71) at an average follow-up of 2.7 years.
Significant improvements in PROMIS scores from pre- to 1-year postoperatively (P < .0001).
Radiographic alignment improved (P < .001), with 28.2% exhibiting tibial component lucency without progression.

Conclusions:

The Infinity with Adaptis Total Ankle Replacement demonstrates favorable early radiographic and clinical outcomes.
High implant survivorship (95.8%) and significant functional improvements were observed.
Further surveillance is recommended to understand the long-term implications of early tibial lucencies.