Please assess the completion status of the following clinical trial:

Trial Title: Acetabular Bone Vascularity in Metal-on-Metal Revisions

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Patients being revised for an aseptic metal on metal acetabular revision.~* Patient is greater than one year postoperative.~* Patient has had cobalt and chromium metal ion levels tested within 6 months of the planned revision surgery.~* Understands the local language and is willing and able to follow the requirements of the protocol.~* Understands the informed consent and signs the institutional review board or independent ethics committee (IRB/IEC) approved informed consent form.~Exclusion Criteria:~* History of infection~* Evidence of current substance or alcohol abuse~* Being treated with radiation, chemotherapy, immunosupression, or chronic steroid therapy (prednisone use up to 5 mg/qd or its equivalent is allowed)~* Is a prisoner

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Metal-on-Metal Revision (Type: None): Patients who have a failed metal on metal total hip implant and are presenting for revision surgery

Based on this trial design, predict the completion outcome and termination type (if applicable).