Please assess the completion status of the following clinical trial:

Trial Title: Whitening Efficacy of Dentifrice Containing 10% High Cleaning Silica, 0.5% Sodium Phytate and 0.5% Sodium Pyrophosphate

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

Eligibility Criteria:
Inclusion Criteria:~* Aged between 18-70 years old~* Good general health~* Could attend the clinical examinations during the 8 week study period~* Possessing \>20 natural permanent teeth that were uncrowned or heavily filled with restorative materials, excluding third molars~* Having a whole-mouth mean tooth stain score of more than 1.5 according to the Lobene index.~Exclusion Criteria:~* Severe oral diseases, chronic disease or allergic to the trial products~* Advanced periodontal diseases~* Females who are pregnant or lactating~* Taking part in other clinical trials~* Taking part in orthodontic treatment or wearing removable denture~* Fluorosis or tetracycline teeth~* Receiving prophylaxis during the previous 3 months or tooth whitening treatment during the past 6 months.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 64 Years
- Healthy Volunteers: t

Study Arms:
- Toothpaste containing effective ingredients (Type: EXPERIMENTAL): Use the toothpaste containing 10% high cleaning silica base,0.5% sodium phytate and 0.5% sodium pyrophosphate to brush teeth twice daily for 8 weeks
- Negative control toothpaste (Type: PLACEBO_COMPARATOR): Use the negative control dentifrice to brush teeth twice daily for 8 weeks

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