Please assess the completion status of the following clinical trial:

Trial Title: Experimental Dentifrice Remineralization/Fluoride Uptake in an in Situ Model

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: SINGLE
- Phase: PHASE2
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~1. Age: Aged between 18 and 78~2. Fluoride: Currently living in the Indianapolis area which has a fluoridated water supply (1 ppm F) and not taking fluoride supplements for medical reasons~3. Dentures: Currently wearing a removable mandibular partial denture with sufficient room in the posterior buccal flange area to accommodate two enamel specimens (required dimensions 12 x 7 mm). Willing and capable of wearing their removable partial dentures 24 hours per day during the experimental periods~4. Dental health:Have no current active caries or periodontal disease that may compromise the study or the health of the participants and all restorations in a good state of repair~5. Salivary flow:Have a salivary flow rate in the range of normal values (unstimulated whole saliva flow rate ≥ 0.2 mL/min; gum base stimulated whole saliva flow rate ≥ 0.8 mL/min~6. Compliance: Understands and is willing, able and likely to comply with all study procedures and restrictions~7. Consent:Demonstrates understanding of the study and willingness to participate as evidenced by voluntary written informed consent and has received a signed and dated copy of the informed consent form~8. General Health: Good general health with (in the opinion of the investigator) no clinically significant and/or relevant abnormalities of medical history or oral examination that could interfere with participant safety during the study period~Exclusion Criteria:~1. Antibiotics:Currently taking antibiotics or have taken antibiotics in the two weeks prior to the screening visit~2. Allergy/Intolerance:Known or suspected intolerance or hypersensitivity to the study materials (or closely related compounds) or any of their stated ingredients~3. Pregnancy:Women who are known to be pregnant or who are intending to become pregnant over the duration of the study.~4. Breast-feeding:Women who are breast-feeding.~5. Clinical Study/Experimental Medication: Participation in another clinical study or receipt of an investigational drug within 30 days of the screening visit~6. Personnel:An employee of the sponsor or the study site who is directly involved in the study

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 78 Years
- Healthy Volunteers: t

Study Arms:
- Sodium fluoride/potassium nitrate/Isopentane dentifrice (Type: EXPERIMENTAL): Participants to brush their teeth for one timed minute twice daily with a gel to foam dentifrice containing active ingredients: 1450 ppm F as sodium fluoride (NaF) and 5% potassium nitrate (KNO3) and isopentane as an excipient ingredient.
- NaF/KNO3 Dentifrice (Type: EXPERIMENTAL): Participants to brush their teeth for one timed minute twice daily with a gel to foam dentifrice, containing as active ingredients: 1450 ppm NaF and 5% KNO3 but no isopentane.
- NaF Dentifrice (Type: ACTIVE_COMPARATOR): Participants to brush their teeth for one timed minute twice daily with a dentifrice containing 1450 ppm F as NaF.
- Placebo Dentifrice (Type: PLACEBO_COMPARATOR): Participants to brush their teeth for one timed minute twice daily with a fluoride free dentifrice (0 ppm F).

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