Please assess the completion status of the following clinical trial:

Trial Title: Effectiveness of Titanium Niobium Nitride Coating in Total Knee Arthroplasty

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 candidate for unilateral primary total knee arthroplasty~Exclusion Criteria:~* Existing orthopaedic metal implants~* A history of hypersensitivity to metals~* Preoperative patch-test positivity to Co, Cr, Ni and Ti~* Malignancies~* Renal insufficiency~* Severe illnesses that would impair participation in this study

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Study Arms:
- Patients undergoing unilateral TKA (Type: None): None

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