Please assess the completion status of the following clinical trial:

Trial Title: Vacuum-formed Retainer Versus Bonded Retainer to Prevent Relapse After Orthodontic Treatment

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:~* Patients treated with fixed appliances in both the maxilla and the mandible~Exclusion Criteria:~* Rapid Maxillary Expansion (RME) for patients with severe transversal malocclusion~* Treatment with segmented appliances~* Patients with craniofacial anomalies and patients requiring orthognatic surgery~* Patients with missing mandibular incisor

- Gender: ALL
- Minimum Age: None
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Group A: CTC retainer + Essix retainer (Type: EXPERIMENTAL): The CTC is bonded directly after debonding. The Essix retainer maxilla is handed out to the patient the same day after removal of fixed appliances.~Alginate impressions are taken at the follow-up visits. Questionnaires are completed at the follow-up visits.
- Group B: Essix retainer + Essix retainer (Type: ACTIVE_COMPARATOR): The Essix retainer maxilla and Essix retainer mandible are handed out to the patient the same day after removal of fixed appliances.~Alginate impressions are taken at the follow-up visits. Questionnaires are completed at the follow-up visits.

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