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, 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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| ready made zirconia | Experimental | the selected tooth will receive ready made zirconia crown |
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| pmma crown | Experimental | the selected tooth will receive cad cam custom made pmma crown |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| preparation of the tooth to receive ready made zirconia crown | Other | Occlusal reduction 1 to 2 mm using flame bur . Open the interproximal contacts. The tooth should be reduced circumferentially by approximately 0.5-1.5mm . The preparation margin should be carefully extended and refined to a feather-edge approximately 1-2mm subgingivally . Crown size will be determined using try in kit . |
| Measure | Description | Time Frame |
|---|---|---|
| Gingival condition | Löe & Silness gingival index | in 6 months |
| Measure | Description | Time Frame |
|---|---|---|
| gingival bleeding | Papilla Bleeding Index | 6 months |
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A- Inclusion Criteria:
B- Exclusion Criteria:-
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| Name | Affiliation | Role |
|---|---|---|
| Adel S Rehab | Al-Azhar University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| AlAzharU | Cairo | Egypt |
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| preparation of the tooth to receive CAD CAM PMMA custom made crown | Other |
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