Please assess the completion status of the following clinical trial:

Trial Title: A Study to Determine the Performance of the Press Fit Condylar (P.F.C.) Sigma RP-F Knee System

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Male or female subjects, aged between 45 and 75 years inclusive.~* Subjects who are able to give voluntary, written informed consent to participate in this investigation and from whom consent has been obtained.~* Subjects who are able to achieve a pre-operative passive range of motion of equal to or greater than 110º.~* Subjects who, in the opinion of the Investigator, are able to understand this investigation, co-operate with the investigational procedures and are willing to return to the hospital for all the required post-operative follow-ups.~* Subjects who present with idiopathic osteoarthritis that in the opinion of the clinical investigator requires a primary total knee arthroplasty.~* Subjects who in the opinion of the Clinical Investigator are considered to be suitable for treatment with the P.F.C.® Sigma RPF knee, according to the indications specified in the package insert leaflet.~Exclusion Criteria:~* Subjects who, in the opinion of the Investigator, have an existing condition that would compromise their participation and follow-up in this study.~* Women who are pregnant.~* Subjects who are known drug or alcohol abusers or with psychological disorders that could effect follow-up care or treatment outcomes.~* Subjects who have participated in a clinical study with an investigational product in the last month (30 days).~* Subjects who are currently involved in any personal injury litigation claims.~* Subjects with a known history of poor compliance to medical treatment.~* Subjects who have a pre-operative limb deformity of equal to or greater than 10° varus or 15° valgus as defined using the anatomical axis.~* Subjects who have morbid obesity i.e. BMI ≥40.

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

Study Arms:
- P.F.C. Sigma RP-F Total Knee Replacement (Type: OTHER): An orthopaedic implant for total knee replacement with a mobile-bearing and a high flexion design

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