Please assess the completion status of the following clinical trial:

Trial Title: European Study on Three Different Approaches to Managing Class 2 Cavities in Primary Teeth

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~- Children aged 3-8 years who attend the Preventive and Paediatric Department of Greifswald University, Germany.~(Lithuania: children who attend the paediatric dentistry department, Dental Faculty, Lithuanian University of Health Sciences)~* At least one primary molar tooth with caries into dentine involving two dental surfaces (diagnosed according to the International Caries Detection and Assessment System \[ICDAS\], codes 3 to 5)~* Willing to be examined~Exclusion Criteria:~* Clinical or radiographic signs of pulpal or peri-radicular pathology~* Patients with a systemic disease requiring special considerations during their dental treatment.~* Parents/children who refuse to participate in the study

- Gender: ALL
- Minimum Age: 3 Years
- Maximum Age: 8 Years
- Healthy Volunteers: t

Study Arms:
- Hall Technique (Type: EXPERIMENTAL): This technique uses preformed Stainless Steel Crowns (SSCs) to restore carious primary molars. Local anaesthesia, caries removal or tooth preparation are not required.
- Non-Restorative Caries Treatment (Type: EXPERIMENTAL): This is a less operative approach, here carious lesions are opened removing the overhanging enamel and making the cavity accessible for biofilm removal. No carious dentine will be removed from the pulpal wall and no local anaesthesia will be placed. Fluoride varnish (Duraphat ®) will be applied to the cavity. Parents/children will be trained to clean the cavity by brushing using a buccolingual technique.
- Conventional Restoration (Type: ACTIVE_COMPARATOR): This technique corresponds to the conventional way of treating cavitated carious lesions involving complete caries removal, use of local anaesthesia (when needed), and a compomer (Dyract ®) restoration. Cotton wool roll isolation and continuous aspiration will be used.

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