Figure 1
Lateral meniscal allograft prepared for arthroscopic implantation (2).
Figure 2
The medial meniscal implant composed of a polycarbonate-urethane matrix, reinforced with circumferential polyethylene fibres (Courtesy of Active Implants Corp., Memphis, TN, USA).
Figure 3
Medial collagen meniscus implant (Courtesy of Ivy Sports Med Patient Brochure).
Figure 4
Coronal fat saturation T2-weighted fast spin echo MR-image of a meniscus allograft in the lateral compartment. Radial displacement of the allograft is a quite common finding after meniscal allograft transplantation.
Figure 5
Sagittal T1-weighted fast spin echo MR-image of a lateral meniscal allograft. The allograft demonstrates generalized high signal (yellow arrow). These signal changes are the result of a change in water content and do not necessarily have to be a sign of degeneration.
Figure 6
Axial T1-weighted fast spin echo MR-image of a medial meniscal allograft. The whole length of the meniscocapsular junction is obscured by multiple micrometallic artefacts caused by surgical manipulation.
Figure 7
Sagittal T1-weighted fast spin echo MR-image demonstrating a small but intact collagen meniscus implant at the posterior horn of the medial meniscus.
Figure 8
(A) Sagittal T1-weighted fast spin echo MR-image demonstrating the slightly hyperintense polyurethane scaffold at the posterior horn of the lateral meniscus. (B) Coronal fat saturation T2-weighted fast spin echo MR-image demonstrating a hyperintense polyurethane scaffold in the medial compartment. The native meniscal rim can be seen as a black rim encapsulating the scaffold. The scaffold demonstrates moderate radial displacement.
Figure 9
Total medial meniscus implant. Coronal (A) and sagittal (B) T1-weighted fast spin echo MR-images demonstrating the discoid medial meniscus implant with homogenous low signal intensity.