Generally speaking, knee replacement patients take longer to recover than, say, hip replacement patients. It should still be noted, however, that recovery time for a total knee replacement can differ vastly from patient to patient. Some patients may take six months to recover; while others may recover in one month.About Bonesmart.org. BoneSmart.org is a National Public-Awareness Campaign for Candidates of Hip Replacement Surgery and Knee Replacement Surgery.ome patients may take six months to recover; while others may recover in one month. About Bonesmart.org. BoneSmart.org is a National Public-Awareness Campaign for Candidates of Hip Replacement Surgery and Knee Replacement Surgery.