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Case Report

Diagnostic Algorithm in Patients with Flexion Instability after Cruciate-Retaining Total Knee Arthroplasty: A Case Report

1
Department of Orthopaedic Surgery and Traumatology, Kantonsspital Baselland (Bruderholz, Liestal, Laufen), Bruderholz, CH-4101 Basel, Switzerland
2
Research Group Michael T. Hirschmann, Regenerative Medicine & Biomechanics, Department of Clinical Research, University of Basel, CH-4001 Basel, Switzerland
3
Department of Orthopaedics, Trauma and Arthroplasty, Care Superspeciality Hospitals, Nampally, Hyderabad 500 001, India
*
Author to whom correspondence should be addressed.
Clin. Pract. 2021, 11(3), 687-693; https://doi.org/10.3390/clinpract11030084
Received: 9 August 2021 / Revised: 13 September 2021 / Accepted: 16 September 2021 / Published: 18 September 2021
A posterior flexion instability due to insufficiency of the posterior cruciate ligament (PCL) in cruciate retaining (CR) total knee arthroplasty (TKA) is an important but underdiagnosed problem. We hereby suggest a diagnostic algorithm, as demonstrated by a case report of a male patient suffering from anterior knee pain and instability after CR TKA. Clinical examination was followed by standard anterior–posterior and lateral radiographs. Stress radiographs in 30° and 90° posterior drawer position enabled a dynamic examination of the instability. SPECT/CT was used to determine the TKA component position in all planes and investigate bone tracer uptake (BTU) patterns. At revision surgery, an absent PCL after CR TKA was noted and a semi-constrained TKA was implanted. View Full-Text
Keywords: cruciate retaining; total knee arthroplasty; total knee replacement; posterior cruciate ligament; PCL cruciate retaining; total knee arthroplasty; total knee replacement; posterior cruciate ligament; PCL
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MDPI and ACS Style

Moser, L.B.; Prabhakar, P.; Hess, S.; Hirschmann, M.T. Diagnostic Algorithm in Patients with Flexion Instability after Cruciate-Retaining Total Knee Arthroplasty: A Case Report. Clin. Pract. 2021, 11, 687-693. https://doi.org/10.3390/clinpract11030084

AMA Style

Moser LB, Prabhakar P, Hess S, Hirschmann MT. Diagnostic Algorithm in Patients with Flexion Instability after Cruciate-Retaining Total Knee Arthroplasty: A Case Report. Clinics and Practice. 2021; 11(3):687-693. https://doi.org/10.3390/clinpract11030084

Chicago/Turabian Style

Moser, Lukas B., Ponnaian Prabhakar, Silvan Hess, and Michael T. Hirschmann 2021. "Diagnostic Algorithm in Patients with Flexion Instability after Cruciate-Retaining Total Knee Arthroplasty: A Case Report" Clinics and Practice 11, no. 3: 687-693. https://doi.org/10.3390/clinpract11030084

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