SINTX Technologies, Inc. announced the appointment of Mark I. Froimson, M.D. to its board of directors. Dr. Froimson is currently a Principal at Riverside Health Advisors, a consulting company that provides strategic advice and services to health care executive leaders. Dr. Froimson served as past President of the American Association of Hip and Knee Surgeons, and as the Executive Vice President and Chief Clinical Officer of Trinity Health, a national non-profit Catholic healthcare system comprising 93 hospitals in 22 states.