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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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Great Toe Joint Hemi-Implant Failure.

James J DiResta¹, Angela Barnes¹

¹*Department of Surgery, Anna Jaques Hospital, Newburyport, MA.

Journal of the American Podiatric Medical Association

|June 25, 2025

Summary

This summary is machine-generated.

Metal allergy can cause cobalt hemi-implants to fail in great toe joint osteoarthritis treatment. This underreported issue necessitates considering implant allergy in differential diagnoses for implant failure.

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Area of Science:

Orthopedic Surgery
Podiatric Medicine
Biomaterials Science

Background:

Hemi-joint implants are used for great toe joint osteoarthritis.
Implant failure necessitates revision surgery.
Causes of implant failure are varied.

Purpose of the Study:

To report a case of cobalt hemi-implant failure due to metal allergy.
To highlight the underreporting of metal allergy in podiatric literature.
To discuss the potential value of metal allergy screening for joint implants.

Main Methods:

Case report presentation.
Literature review on metal allergy and joint implants.
Discussion of diagnostic methods for metal allergy.

Main Results:

A cobalt hemi-implant failed 16 months post-implantation due to suspected metal allergy.
Metal allergy is an underreported cause of hemi-implant failure in the great toe.

Conclusions:

Metal allergy should be considered in the differential diagnosis of hemi-joint implant failure.
Preoperative screening for metal allergy may be beneficial.
Further investigation into metal allergy prevalence with joint replacement is warranted.