Introduction Epidemiology most common reason for secondary surgery following total knee arthroplasty Causes may be related to prosthetic design extensor mechanism imbalance asymmetric patellar resection malrotation patellar malpositioning Presentation Symptoms complaints may include feelings of subluxation frank dislocation peri-patellar pain limited flexion Imaging Radiographs recommended views AP used to assess placement of femoral component and Q angle lateral used to assess size and rotation of femoral component tangential used to assess subluxation of patella, placement of patellar component, angle of patellar resection, and patellar tilt findings laterally subluxed patella increased Q angle anterior placement of femoral component asymmetric patellar resection lateral placement of paellar component lateral osteophyte on patella CT best to assess for rotational malalignment Treatment Must appropriately address etiology
Technique Guide Technique guide are not considered high yield topics for orthopaedic standardized exams including the ABOS, EBOT and RC. Revision TKR Orthobullets Team Recon - TKA Instability Technique Guide Technique guide are not considered high yield topics for orthopaedic standardized exams including the ABOS, EBOT and RC. TKA - Parapatellar Approach Derek Bernstein Stephen Incavo Recon - TKA Patellar Maltracking Technique Guide Technique guide are not considered high yield topics for orthopaedic standardized exams including the ABOS, EBOT and RC. TKA - Varus Knee with Anterior Referencing and Gap Balancing Technique Derek Bernstein Stephen Incavo Recon - TKA Periprosthetic Fracture
QUESTIONS 1 of 5 1 2 3 4 5 Previous Next This is an AAOS Self assessment question. Orthobullets was not involved into the editorial process, and does not have the ability to alter. If you prefer to hide SAE questions on topics simply turn them off in your Content Settings (SAE07HK.95) A patient with a valgus knee and lateral compartment bone loss undergoes a total knee arthroplasty using posterior condylar referencing instrumentation. Six months after surgery, the patient reports significant anterior knee pain, and radiographs reveal severe lateral patellar tilt. Management should consist of Review Topic QID: 6055 1 lateral retinacular release. 17% (68/390) 2 femoral component revision. 75% (293/390) 3 medialization of the patellar component. 4% (16/390) 4 patellectomy. 0% (0/390) 5 tibial tubercle transfer. 2% (9/390) ML 2 Select Answer to see Preferred Response PREFERRED RESPONSE 2 This is an AAOS Self assessment question. Orthobullets was not involved into the editorial process, and does not have the ability to alter. If you prefer to hide SAE questions on topics simply turn them off in your Content Settings (SAE07HK.83) During total knee arthroplasty, the patella is noted to subluxate laterally despite a lateral retinacular release. Which of the following methods is most likely to improve patellar stability? Review Topic QID: 6043 1 Slight external rotation of the tibial component 72% (70/97) 2 Slight internal rotation of the femoral component 10% (10/97) 3 Slight anterior translation of the tibial component 3% (3/97) 4 Use of a fixed-bearing knee as opposed to a mobile-bearing knee 3% (3/97) 5 Use of a thicker patellar component 10% (10/97) ML 2 Select Answer to see Preferred Response PREFERRED RESPONSE 1 This is an AAOS Self assessment question. Orthobullets was not involved into the editorial process, and does not have the ability to alter. If you prefer to hide SAE questions on topics simply turn them off in your Content Settings (SAE07HK.11) A 64-year-old man undergoes a primary total knee arthroplasty. Three months after surgery he reports persistent pain, weakness, and difficulty ambulating. Postoperative radiographs are shown in Figures 6a through 6c. What is the best course of action at this time? Review Topic QID: 5971 FIGURES: A B C 1 Hinged knee brace 0% (0/406) 2 Patellar component revision with a tantalum implant and lateralization of the patella 2% (8/406) 3 Revision knee arthroplasty with greater internal rotation of the tibial component 2% (8/406) 4 Revision total knee arthroplasty with a lateral release and external rotation of the femoral component 92% (373/406) 5 Revision total knee arthroplasty with a lateral release and internal rotation of the femoral component 4% (16/406) ML 1 Select Answer to see Preferred Response PREFERRED RESPONSE 4 Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK