# Inferior prosthetic hip dislocation requiring revision: A case report

## TL;DR

A rare case of inferior prosthetic hip dislocation after total hip arthroplasty is reported, highlighting the need for tailored surgical approaches and patient compliance.

## Contribution

This case report adds to the limited literature on inferior prosthetic hip dislocations and the use of constrained liners in revision surgeries.

## Key findings

- Inferior prosthetic hip dislocation is rare and often requires open surgery after failed closed reduction.
- Constrained acetabular liners may improve stability in revision THA for high-risk patients.
- Patient noncompliance and inadequate follow-up can lead to recurrent dislocations.

## Abstract

Total hip arthroplasty (THA) is a highly successful orthopaedic procedure performed for various indications. While rare, complications such as dislocation do occur. We present the case of a 59-year-old female who had a late inferior hip dislocation after a traumatic fall.

The patient who had a recent THA for femoral neck fracture experienced an incarcerated inferior prosthetic dislocation following mechanical fall. Revision surgical intervention yielded satisfactory stability, but patient noncompliance led to a subsequent dislocation, requiring another revision surgery. Despite failed attempts at closed reduction, a constrained acetabular liner was successfully implemented, resulting in a stable THA.

This case underscores the complexities of managing inferior hip dislocations, particularly the importance of patient adherence to post-operative care and the need for tailored surgical approaches.

Further investigation into long-term outcomes associated with constrained liners in revision THA is warranted, as well as strategies to enhance patient compliance to mitigate complications.

•Inferior prosthetic hip dislocation is rare after THA, with few cases reported in the current literature.•Closed reduction failed due to femoral head entrapment and acetabular fracture, requiring open surgery.•Recurrent prosthetic dislocation was treated with revision THA using a constrained liner for stability.•This case shows the importance of close post-op follow-up to prevent and manage prosthetic complications.•Constrained liners may help manage prosthetic instability in high-risk patients after failed THA revision.

Inferior prosthetic hip dislocation is rare after THA, with few cases reported in the current literature.

Closed reduction failed due to femoral head entrapment and acetabular fracture, requiring open surgery.

Recurrent prosthetic dislocation was treated with revision THA using a constrained liner for stability.

This case shows the importance of close post-op follow-up to prevent and manage prosthetic complications.

Constrained liners may help manage prosthetic instability in high-risk patients after failed THA revision.