Fig 1.
Measurement of trochlear groove angle on axial T1WI image.
Table 1.
Patellofemoral morphology Wiberg classification criteria.
Fig 2.
A: Coronal T1-weighted MR image; B: Coronal fat-suppressed proton density-weighted MR image.
Female, 32 years old, transverse fracture. The patellar was divided into two parts: upper and lower.
Fig 3.
A: Coronal T1-weighted MR image; B: Coronal fat-suppressed proton density-weighted MR image.
Female, 46 years old, longitudinal fracture. The T1WI signal of the patellar is reduced, and the patellar is divided into two parts: the right and the left.
Fig 4.
A: Coronal T1-weighted MR image; B: Coronal fat-suppressed proton density-weighted MR image.
Male, 60 years old, oblique fracture. The fracture line is at an angle to the mid-axis of the body.
Fig 5.
A: Axial T1-weighted MR image; B: Axial fat-suppressed proton density-weighted MR image.
Female, 26 years old, tangential fracture. Patellar subluxation with localized osteochondral defects in the medial portion of the patellar, patchy osteoedema of the lateral femoral condyle on axial fat-suppressed proton density-weighted MR image, and grade II signal in the medial patellar retinaculum. Simple effusion in the joint capsule.
Fig 6.
A: Coronal T1-weighted MR image; B: Coronal fat-suppressed proton density-weighted MR image.
Male, 46 years old, comminuted fracture. The patellar was divided into 3 parts of unequal size and the subcutaneous soft tissue around the joint was edematous.
Table 2.
Sex and age of different types of patella fractures (n, %).
Table 3.
Different types of patellar fractures combined with ligament injuries (n, %).
Table 4.
Peripatellar tissue injuries in patients with different types of patellar fracture (n, %).
Table 5.
Comparison of patellofemoral joint morphology among patients with different types of patellar fractures (cases, %).