Please assess the completion status of the following clinical trial:

Trial Title: Fluoroscopic and RSA Evaluation of the Triathlon Total Knee Prosthetic Design

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Patient (minimum age of 18 years old, no maximum age limit) is diagnosed with osteoarthritis or rheumatoid arthritis and requires primary arthroplasty.~* Patient is capable of giving informed consent and expressing a willingness to comply with this study~* Patient has no major deformities (i.e. sagittal and coronal deformities are less then 15 degrees)~* The ability to perform a lunge and step-up motion without the help of bars or a cane.~* No or slight pain during activity according to the Knee Society Pain Score~Exclusion Criteria:~* The patient is unable or unwilling to sign the Informed Consent specific to this study~* The individual has a functional impairment of any other lower extremity joint besides the operated knee~* Patient has a flexion contracture of 15° and more~* Patient has a varus/valgus contracture of 15° and more~* Patients requiring revision arthroplasty~* The patient does not understand the Dutch or English language good enough to participate.~* The use of walking aids~* The inability to walk more than 500 meters

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

Study Arms:
- Triathlon Mobile-bearing (Type: EXPERIMENTAL): Primary total knee replacement with cemented Triathlon posterior stabilized mobile-bearing
- Triathlon Fixed-bearing (Type: ACTIVE_COMPARATOR): Primary total knee replacement with cemented Triathlon posterior stabilized fixed-bearing

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