Clinical Efficacy of Preformed Pediatric Zirconia and Metal Crown

Inclusion Criteria: * Healthy children aged 6-9 years with caries on primary molars * Children without systemic disease or developmental dental anomalies that may affect caries susceptibility. * Children whose cooperation is 'positive' or 'absolutely positive' according to the Frankl behavioral scale (Frankl et al., 1962). * Those with deep dentin caries that do not extend to the pulp in the teeth to be treated * The molars will be treated with a crown indication. * Presence of symmetry of the primary molar to be treated in the opposite arch. * The molar to be treated is in occlusion with the antagonist. * Presence of caries on at least two surfaces of the molars to be treated. * Absence of spontaneous pain, abscess, mobility, interradicular lesion in the tooth to be treated * Patients whose parents and themselves agree to participate in the treatment Exclusion Criteria: * Children whose treatment cannot be continued on the dental chair due to cooperation * Molars that will soon be exfoliated, 1/2 of the root has been resorbed * The presence of bruxism * The presence of erosion or attrition-related wear on the opposing molar * The patient does not come to the control appointment or does not want to continue to the research * Have allergy to local anesthetic, nickel or chromium * Complications during treatment.