All on Four Dental Implants: Case 20 This patient had a few implants placed and had a snap on denture. He never felt comfortable with it and after a year he had several denture fractures. He was unhappy with his snap on denture, unfortunately the implants he had were not in the right spot for the all on four. We removed his implants and placed implants that accommodate the all on four. He now has a palate-less prosthesis that is nice and slim and NON removable.