Please assess the completion status of the following clinical trial:

Trial Title: Meta-analysis of Stannous Fluoride and the Effects on Gingival Health

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: OTHER
- Primary Purpose: None
- Time Perspective: RETROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Subjects were excluded from this study for the following reasons;~* pregnancy,~* rampant caries,~* severe periodontitis,~* at discretionary of the Principal Investigator.

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

Study Arms:
- Stannous Fluoride Dentifrice (Type: None): Twice daily brushing
- Positive Control Dentifrice (Type: None): Twice daily brushing
- Negative Control Dentifrice (Type: None): Twice daily brushing

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