Please assess the completion status of the following clinical trial:

Trial Title: Immunohistochemical Study of Human Teeth Pulp Capped With Mineral Trioxide Aggregate (MTA) and Novel Endodontic Cement (NEC)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* patients 16-30 year-old~* patients with no systemic disease~* vital mature teeth with closed apex, no caries either clinically or radiographically, and without any restoration~* patients willing to participate in study~Exclusion Criteria:~* patients not in the range of 16-30 year-old~* patients with systemic disease~* nonvital teeth~* open apex teeth~* teeth with caries or restorations~* patients not willing to participate in study

- Gender: ALL
- Minimum Age: 16 Years
- Maximum Age: 30 Years
- Healthy Volunteers: t

Study Arms:
- Mineral Trioxide Aggregate(MTA) (Type: EXPERIMENTAL): MTA is a proper material for direct pulp capping,treatment of tooth perforations,root end filling.It is a safe and biocompatible material,which can induce cementum formation on root surface.In direct pulp capping, MTA can induce dentinal bridge formation on the expose surface to preserve pulp vitality.Although MTA has superior biocompatibility compared with the conventional materials,it has a delayed setting time, poor handling characteristics and off-white color
- NEC cement (Type: EXPERIMENTAL): NEC cement is a proper material for direct pulp capping and treatment of tooth perforation. It is a new dental material that combines reasonable biocompatibility of MTA with appropriate setting time,handling characteristics,chemical properties and color.Like MTA, NEC cement can induce dentinal bridge formation in direct pulp capping to preserve pulp vitality.

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