Clinical Evaluation of Polymethyl Methacrylate CAD/CAM Crowns Versus Prefabricated Zirconia Crowns in Primary Molars

Clinical Evaluation of Polymethyl Methacrylate CAD/CAM Crowns Versus Prefabricated Zirconia Crowns in Primary Molars

, in this studythe investigator will compare between ready-made zirconia crowns and Computer-aided design and Computer-aided manufacturing (CAD/CAM) polymethyl methacrylate (PMMA) crowns to overcome the disadvantages of ready-made zirconia crowns.

A- Inclusion Criteria:

1. Primary molars indicated for crown restoration (pulp treated molars indicated for crown
2. Co-operative child (Frankel scale +ve and ++ve)
3. The age ranged from 4 to 8 years regardless of sex or socioeconomic background.

B- Exclusion Criteria:-

1. Badly decayed non-restorable tooth indicated for extraction.
2. Patients with parafunctional habits like bruxism.
3. Systemic diseases with oral manifestation or blood diseases.