# Total knee arthroplasty and medial patellofemoral ligament reconstruction for knee osteoarthritis with habitual patellar dislocation: a case report

## TL;DR

This case report describes a successful surgical approach combining total knee arthroplasty and ligament reconstruction for a patient with knee osteoarthritis and patellar dislocation.

## Contribution

The paper introduces a novel surgical integration for co-occurring knee osteoarthritis and habitual patellar dislocation.

## Key findings

- The combined surgical approach resulted in a stable, pain-free knee joint.
- The patient experienced no significant patellar displacement after the procedure.
- Further studies are needed to confirm the generalizability of this treatment.

## Abstract

Knee osteoarthritis and habitual patellar dislocation are clinically common osteoarticular diseases. However, existing literature lacks reports on their co-occurrence and treatment approaches. Thus, we propose a surgical approach that integrates total knee arthroplasty with medial patellofemoral ligament reconstruction, addressing knee osteoarthritis alongside habitual patellar dislocation.

A 78-year-old female developed habitual lateral patellar dislocation of the left knee after an accidental fall over 20 years ago. One year prior, she experienced weight-bearing pain in the left knee. Physical examination, full-length lower limb radiography, and computed tomography confirmed a diagnosis of left knee osteoarthritis with habitual patellar dislocation. The patient subsequently underwent total knee arthroplasty combined with medial patellofemoral ligament reconstruction.

This case demonstrates notable innovation among similar reports. It may represents an effective treatment, enabling the patient to walk without impediment, with a stable and pain-free knee joint and no significant patellar displacement during flexion. Further case studies are still required to validate the generalizability of this surgical technique.