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Dislocation after Posterior Stabilized Primary Total Knee Replacement: A Rare Complication in Four Cases
W Spierenburg1, E L A R Mutsaerts2, J J A M van Raay1
1Department of Orthopaedic Surgery, Martini Hospital, Groningen, Netherlands.
Case Reports in Orthopedics
|October 25, 2021
Summary
Dislocation after total knee arthroplasty is rare but linked to patient factors like obesity and severe deformities. Surgeons should consider these risks for better patient outcomes.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Total knee arthroplasty (TKA) is a common procedure with a low rate of dislocation.
- Patient-related factors, including obesity, neuropsychiatric disease, and severe limb deformities, are associated with an increased risk of TKA dislocation.
Observation:
- Four case reports of TKA dislocation are presented.
- Three of the presented cases involved patients with obesity.
- Three patients experienced instability, highlighting the importance of ligament balancing during TKA surgery.
Findings:
- Obesity, neuropsychiatric disorders, and severe valgus or varus deformities are significant patient-related risk factors for TKA dislocation.
- Implant factors and surgical technique also contribute to this rare complication.
- Polyethylene liner exchange was performed in all presented cases.
Implications:
- Awareness of these risk factors is crucial for surgeons when considering TKA.
- Patient education and shared decision-making are essential before proceeding with total knee replacement.
- Careful patient selection and surgical planning can help mitigate the risk of TKA dislocation.
