**Abstract**

The preservation of the structure of the meniscus despite a tear has been widely discussed in the literature. However, meniscectomy continues to be the mostperformed meniscus surgery. In a percentage of patients, knee pain and swelling, as well as tibial plateau bony edema, follow meniscus resection; this panoply of symptoms is known as "post-meniscectomy syndrome". The management of this condition requires meniscus transplant in case of total meniscectomy or a meniscus scaffold in the case of a partial resection. This chapter aims to discuss the indication, surgical technique, and outcomes of collagen meniscus implants (CMI) for partial resections and meniscus transplants for full resections.

**Keywords:** meniscus transplant, collagen meniscus implant, post-meniscectomy syndrome, meniscus scaffold, osteoarthritis
