The incidence of quadriceps or patellar tendon tears after TKA is low, at 0.17% to 2.5% [149]. Sharkey et al [12] reported that the incidence of postoperative arthrofibrosis is also relatively low, accounting for 4.5% of failures in this series and 6.9% of failures where noted in the Lombardi et al [111] series. Of note, patients with keloids have increased odds risk of arthrofibrosis following primary TKA [150]. Additional periprosthetic soft-tissue causes of postoperative knee pain are also uncommon and include impingement of nerves or other soft tissues. Imaging After Total Knee Arthroplasty 3-Phase Bone Scan Knee There is insufficient evidence to support the use of 3-phase bone scan for the assessment of periprosthetic soft- tissue abnormalities. CT Arthrography Knee CT is not useful for assessment of periprosthetic soft-tissue abnormalities. Intraarticular contrast is not significantly helpful in the CT assessment of quadriceps or patellar tendon tears, postoperative arthrofibrosis, patellar clunk syndrome, or impingement of nerves or other soft tissues. CT Knee With IV Contrast CT is not useful for assessment of periprosthetic soft-tissue abnormalities. IV contrast is not significantly helpful in the CT assessment of quadriceps or patellar tendon tears, postoperative arthrofibrosis, patellar clunk syndrome, or impingement of nerves or other soft tissues. CT Knee Without and With IV Contrast CT is not useful for assessment of periprosthetic soft-tissue abnormalities. IV contrast is not significantly helpful in the CT assessment of quadriceps or patellar tendon tears, postoperative arthrofibrosis, patellar clunk syndrome, or impingement of nerves or other soft tissues. CT Knee Without IV Contrast There is insufficient evidence to support the use of CT without IV contrast for the assessment of periprosthetic soft- tissue abnormalities.
Imaging After Total Knee Arthroplasty. The incidence of quadriceps or patellar tendon tears after TKA is low, at 0.17% to 2.5% [149]. Sharkey et al [12] reported that the incidence of postoperative arthrofibrosis is also relatively low, accounting for 4.5% of failures in this series and 6.9% of failures where noted in the Lombardi et al [111] series. Of note, patients with keloids have increased odds risk of arthrofibrosis following primary TKA [150]. Additional periprosthetic soft-tissue causes of postoperative knee pain are also uncommon and include impingement of nerves or other soft tissues. Imaging After Total Knee Arthroplasty 3-Phase Bone Scan Knee There is insufficient evidence to support the use of 3-phase bone scan for the assessment of periprosthetic soft- tissue abnormalities. CT Arthrography Knee CT is not useful for assessment of periprosthetic soft-tissue abnormalities. Intraarticular contrast is not significantly helpful in the CT assessment of quadriceps or patellar tendon tears, postoperative arthrofibrosis, patellar clunk syndrome, or impingement of nerves or other soft tissues. CT Knee With IV Contrast CT is not useful for assessment of periprosthetic soft-tissue abnormalities. IV contrast is not significantly helpful in the CT assessment of quadriceps or patellar tendon tears, postoperative arthrofibrosis, patellar clunk syndrome, or impingement of nerves or other soft tissues. CT Knee Without and With IV Contrast CT is not useful for assessment of periprosthetic soft-tissue abnormalities. IV contrast is not significantly helpful in the CT assessment of quadriceps or patellar tendon tears, postoperative arthrofibrosis, patellar clunk syndrome, or impingement of nerves or other soft tissues. CT Knee Without IV Contrast There is insufficient evidence to support the use of CT without IV contrast for the assessment of periprosthetic soft- tissue abnormalities.