Can a silver coating make Kids' cavity treatment more effective?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patient-related inclusion criteria: 1. Children aged 4 to 8 years old. 2. One surface carious lesion. 3. No signs and symptoms. (e.g., no tooth pain) 4. Presence of one or more primary molar(s) with deep carious dentine. Tooth-related eligibility criteria: 1. Presence of active cavitated carious lesions that can be removed by an excavator are accessible with hand instruments. 2. Vital pulp with symptom-free or reversible pulpitis. 3. No spontaneous/prolonged pain or percussion pain. 4. No abnormal mobility or signs of infection (swelling, fistula, abscess). 5. Sufficient tooth structure for stainless steel crown retention. 6. Deep caries lesions radiographically extend through at least the inner half of the dentine. 7. Presence of a clear band of normal-appearing dentine between the carious lesion and the pulp in a bitewing radiograph. 8. More than 2/3 of the roots remaining. 9. No internal/external resorption or periapical/furcation pathology. Exclusion Criteria: * 1\. Presence of severe systemic medical conditions (e.g., uncontrolled diabetes, immunodeficiency disorders). 2\. Use of medications known to interfere with dental treatment or healing, such as anticoagulants or immunosuppressants. 3\. Presence of extensive dental caries or additional oral pathologies requiring urgent or specialized dental care beyond the scope of the study. 4\. Patients allergic/sensitive to nickel since PMCs contain nickel. 5. Cases with significant space loss or reduced mesio-distal width due to interproximal caries (making crown fitting difficult). 6\. Unaffected dentine between lesion and pulp cannot be confirmed clinically/radiographically. 7\. Presence of extensive dental caries or additional oral pathology requiring urgent or specified dental care beyond scope of study.