There is no definitive answer to this question as it depends on the specific injury and how often it needs to be treated. Some people believe that ice packs can help reduce inflammation, so they may be beneficial for knee replacement purposes. Others believe that ice packs do not have a significant impact on the healing process, so they are only suitable for short-term use. Ultimately, it is up to the individual to decide whether or not they need ice packs for their knee replacement.