meniscal repalcement

26 yr old male with 2 year post acl tear medial meniscal  was in bits except an intact  root and  a peripheral rim was intactInspite of ACL a reconstruction the evidence of impending osteoarthritis  made us consider a meniscal replacement when  transplant was unavailable.  He is two year post op with no symptoms to date recent mri shows still some tissue perisisting although smaller than immediate postop