Please assess the completion status of the following clinical trial:

Trial Title: Evaluation of Oral Hygiene Products in an In Situ Caries Model

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: None
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~1. Aged between 18 and 85 years inclusive~2. Understands and is willing, able and likely to comply with all study procedures and restrictions~3. Good general and mental health with, in the opinion of the investigator or medically qualified designee:~   * No clinically significant and relevant abnormalities in medical history or upon oral examination.~  * Absence of any condition that could affect the participant's safety or well-being or their ability to understand and follow study procedures and requirements~4. Currently living in the Indianapolis, Indiana area and has not had a professional fluoride treatment within 14 days of the first treatment visit~5. Currently wearing a removable mandibular partial denture with sufficient room in one posterior buccal flange areas to accommodate two enamel specimens~6. Willing to have their denture modified to accommodate enamel test specimens and willing and capable of wearing their removable mandibular partial dentures 24 hours per day during the experimental periods~7. Have a salivary flow rate in the range of normal values (un-stimulated whole saliva flow rate ≥ 0.2 milliliter (mL)/minute; gum base stimulated whole saliva flow rate ≥ 0.8 mL/minute).~Exclusion Criteria:~1. Pregnant or breast feeding women~2. Known or suspected intolerance or hypersensitivity to the study materials (or closely related compounds) or any of their stated ingredients~3. Currently taking antibiotics or have taken antibiotics in the two weeks prior to the screening visit.~4. Taking or have taken a bisphosphonate drug for treatment of osteoporosis.~5. Participation in another GSKCH investigational dental product study within seven days of first study treatment.~6. Previous participation in this study.~7. Recent history (within the last year) of alcohol or other substance abuse.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 85 Years
- Healthy Volunteers: t

Study Arms:
- Placebo dentifrice/Fluoride rinse (Type: EXPERIMENTAL): Twice daily brushing with a non-fluoride (placebo) toothpaste followed by once daily rinsing (post night time brushing) with a fluoride mouthwash containing 220 ppm of fluoride as sodium fluoride
- Placebo dentifrice/No rinse (Type: PLACEBO_COMPARATOR): Twice daily brushing with a non-fluoride (placebo) toothpaste
- Fluoride dentifrice/No rinse (Type: ACTIVE_COMPARATOR): Twice daily brushing with a fluoride toothpaste containing 1150 ppm of fluoride as sodium fluoride
- Fluoride dentifrice/Fluoride rinse (Type: EXPERIMENTAL): Twice daily brushing with a fluoride toothpaste containing 1150 ppm of fluoride as sodium fluoride, followed by once daily rinsing (post night time brushing) with a fluoride mouthwash containing 220 ppm of fluoride as sodium fluoride.

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

Answer: outcome: complete