Please assess the completion status of the following clinical trial:

Trial Title: In-vivo Wear Behaviour of AS Coated Versus Uncoated Columbus® Total Knee Prosthesis

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

Eligibility Criteria:
Inclusion Criteria:~* Indication for a primary bicondylar total knee endoprosthesis with the Columbus® DD knee prosthesis~* Written signed informed consent of patient~* Willingness and mental ability to participate at the long-term follow-up examinations~Exclusion Criteria:~* Pregnancy~* Patient age \<45 and \>75years~* Acute inflammatory arthritis~* Coagulation disorders (e.g. Haemophilia)

- Gender: ALL
- Minimum Age: 45 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- Columbus® DD Primary CoCr (Type: None): Columbus® Deep Dish (DD) Primary Cobalt Chromium (CoCr)
- Columbus® DD Primary CoCr AS coated (Type: None): Columbus® Deep Dish (DD) Primary Cobalt Chromium (CoCr) Advanced Surface

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