Cargando…

The CT gap sign, a case of failure to seat the polythene component in total ankle replacement (infinity)

We present a case of incorrect seating of the polyethylene liner in an INFINITY total ankle replacement causing discomfort and eventually leading to a revision ankle replacement. This malposition of the implant was observed on a computed tomography (CT) scan as a ‘gap’ between the liner and the body...

Descripción completa

Detalles Bibliográficos
Autores principales: Anugraha, Anoop, Ferguson, Zak, Pillai, Anand
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7092681/
https://www.ncbi.nlm.nih.gov/pubmed/32226603
http://dx.doi.org/10.1093/jscr/rjz363
Descripción
Sumario:We present a case of incorrect seating of the polyethylene liner in an INFINITY total ankle replacement causing discomfort and eventually leading to a revision ankle replacement. This malposition of the implant was observed on a computed tomography (CT) scan as a ‘gap’ between the liner and the body of the replacement. The patient complained of discomfort on walking postoperatively, which limited activity. All investigations were normal including X-Ray, inflammatory markers, ultrasound, and it was only the subtle CT changes along with history that confirmed the diagnosis. This case demonstrates a complication of the design of the INFINITY prosthesis and the approach taken to the ankle when inserting. The patient fortunately made a full recovery after revision surgery, returning to normal activities with minimal pain.