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Spontaneous 180-Degree Rotatory Dislocation of Rotating-Platform Total Knee Arthroplasty
Stephen Sierra1, Chibuzo Akalonu1, Kevin West1
1Department of Orthopaedic Surgery and Rehabilitation, Texas Tech University Health Sciences Center, 3601 4th St. MS 9436, Lubbock, TX 79436, USA.
Case Reports in Orthopedics
|October 23, 2019
Summary
A rare 180-degree rotary dislocation of the polyethylene component in rotating-bearing total knee arthroplasty occurred without trauma. This unique case challenges existing understanding of this rare complication.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Materials science
Background:
- Rotating-bearing total knee arthroplasty (TKA) offers theoretical advantages in kinematics and wear.
- A known rare complication is rotary dislocation of the polyethylene component.
Observation:
- This case presents a unique 180-degree polyethylene dislocation.
- The dislocation occurred spontaneously, without any reported trauma.
Findings:
- The polyethylene component dislocated completely (180 degrees) around the tibial baseplate.
- This is a more severe presentation than the typical 90-degree dislocation.
Implications:
- This case highlights the potential for severe, non-traumatic polyethylene dislocation in rotating-bearing TKA.
- Further research may be needed to understand the mechanisms and prevention of such rare events.
- Clinical vigilance for unusual TKA complications is warranted.
