Arthritis (Hip)

The goal of this clinical trial is to develop an pharmacist-led preoperative opioid taper intervention for patients undergoing total knee or hip replacement who are on chronic opioids before their surgery. The main questions it aims to answer are: * Is the intervention feasible and acceptable to patients? * Does the intervention result in a decrease in opioid dose during the preoperative period? Participants will meet with a clinical pharmacist, who will provide some basic education on pain and opioids, and will propose an opioid taper schedule. The pharmacist will then follow-up with the participant by phone each week until surgery to assess progress and adjust the taper as necessary.

The goal of this observational study is to collect clinical and radiological data to monitor the safety and performance of the ROMAX hip resurfacing system. The main parameter that will be measured is the rate of revisions at 10 years.