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| Group | Type of Failure | Chi square | p value | ||
| Cement Interface Fracture | Laminate Fracture | ||||
| Butt Joint Cerec Tessera (A1) | Count | 5 | 5 | 8.57 | 0.03 S |
| % within Group | 50.0% | 50.0% | |||
| Butt Joint Upcera (A2) | Count | 2 | 8 | ||
| % within Group | 20.0% | 80.0% | |||
| Feather Edge Cerec Tessera (B1) | Count | 5 | 5 | ||
| % within Group | 50.0% | 50.0% | |||
| Feather Edge Upcera (B2) | Count | 0 | 10 | ||
| % within Group | 0.0% | 100.0% | |||
