Premature failure of a screw-retained ceramic single crown: A clinical report and fractographic analysis
| Autor: | Vilma Sanhueza, Michael Wendler, Natalia Marcus, Fernando Grandon, Daniel Juica |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Dental Stress Analysis
musculoskeletal diseases Ceramics Materials science medicine.medical_treatment Bone Screws Dentistry Single crown Crown (dentistry) 03 medical and health sciences 0302 clinical medicine Clinical report Materials Testing medicine Dental Restoration Failure Ceramic Crowns business.industry 030206 dentistry equipment and supplies Dental Porcelain Screw retained Catastrophic failure visual_art Fracture (geology) visual_art.visual_art_medium Computer-Aided Design Dental Prosthesis Implant-Supported Zirconium Oral Surgery business Abutment (dentistry) |
| Zdroj: | The Journal of Prosthetic Dentistry. 127:32-37 |
| ISSN: | 0022-3913 |
| Popis: | Screw-retained implant-supported ceramic restorations have shown increased rates of technical complications compared with their cemented counterparts, including fracture and chipping of the ceramic structures. The present clinical report identified the causes leading to the catastrophic failure of a screw-retained lithium disilicate veneered crown cemented to a zirconia abutment with a titanium base by using a systematic fractographic approach. A combination of occlusal overloading, a deficient design and inadequate material selection was identified as being responsible for the fracture. These findings highlight the importance of a thorough analysis of the anatomic conditions and loading scenario of screw-retained implant-supported restorations. |
| Databáze: | OpenAIRE |
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