<unk>  refers to the<unk>  of any medical<unk>  to meet the claims of its manufacturer or the health care provider involved in its installation.<unk>  can have any number of causes. The rates of<unk>  vary for different<unk> s. The monitoring of the safety of<unk> s is conducted within the context of broader pharmacovigilance.
Implant failure
Transplant rejection
Chronic wound
Occult fracture
Chronic radiation syndrome
Resistant cancer
Bone metastasis
Tumor progression