The main problem introduced in this study is the aggressive reduction needed for ready-made zirconia crowns to be passively fitted. In addition, its relatively expensive cost and wear of the opposing tooth structure. In this study, different crown materials will be introduced, such as customized zirconia crowns and novel 3D printed resin crowns who may offer better adaptability and gingival health and are relatively cost effective. The proposed study will help in increasing studies of different crown materials for primary teeth
Healthy children within age range of 5-8 years old
Upper and lower primary second molars
Vital primary second molars
Cooperative children Frankl scale 3 (positive) and 4 (definitely positive)
Radiographic radiolucency related to the furcation and periapical area or any evidence of root resorption
Deep bite
More than 2 walls lost due to caries
Presence of parafunctional habits
Parallel
esthetic dental crowns
Procedure/SurgeryMinimal Preparation of esthetic dental crown
control group
Procedure/SurgeryNuu smile ready-made zirconia crown with its well-known reduction
Functional, biological , and esthetic performance according to FDI clinical criteria
FDI World Dental Federation scores from 1-5 (highest score 1 and lowest score 5 )
Measure amount of reduction done after preparation
Using superimposition technique
Measure time taken during preparation
Stopwatch / timer from start of preparation till the end of preparation
Measure amount of bleeding during preparation
Gravimetric method by weighing pre and post procedure gauze on scale
Patient's satisfaction while restoring primary molars
Wong baker Faces scale ( 0 least indication no pain and 5 highest indicating pain)
Measure cost-effectiveness of each crown material
Compare costs between different crown materials
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