Please assess the completion status of the following clinical trial:

Trial Title: SIXES: Should I eXtract Every Six? A Study of the Extraction of Permanent Molar Teeth in Children.

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

Eligibility Criteria:
Inclusion Criteria:~* Age: 7 -11 years~* Dental History: Able to co-operate with dental treatment~* Regular attender or considered likely to return for follow-up Social History~* Child and carer able to understand study documentation and give consent to participate in study~Dental condition:~* One or two lower FPMs requiring extraction~* Upper FPMs are sound or restorable/ restored with good long term prognosis (i.e. has or requires a single surface restoration with caries less than half-way into dentine, restoration with a simple restoration)~* Confirmed presence of all second premolars and all second molars~Exclusion Criteria~* Medical History: Medical contraindication to dental extractions~* Dental condition: Poor prognosis of premolars or permanent second molar teeth~* All four upper incisors in crossbite~* Poor prognosis of upper FPM~* Confirmed absence of one or more second premolars and second molars~* Declines to have impressions taken

- Gender: ALL
- Minimum Age: 7 Years
- Maximum Age: 11 Years
- Healthy Volunteers: f

Study Arms:
- Compensatory Extraction (Type: ACTIVE_COMPARATOR): Patients allocated to this group, both the upper FPM and lower FPM teeth will be extracted.
- No Compensatory Extraction (Type: ACTIVE_COMPARATOR): Patients allocated to this group, only the lower FPM tooth will be extracted.

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