Effect of Cervical Margin Relocation With Different Injectable Restorative Materials on Fracture Resistance of Molars Received MOD CAD/CAM Onlay Restorations
Basema N. Roshdy, Radwa I. Eltoukhy, Ashraf I. Ali, Salah Hasab Mahmoud
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引用次数: 0
Abstract
Objective
To investigate the effect of cervical margin relocation with four different injectable restorative materials on the fracture resistance of molars receiving mesio–occluso–distal CAD/CAM nanoceramic onlay restorations.
Materials and Methods
One hundred and five sound mandibular molars received a standardized mesio–occluso–distal onlay preparation, with cervical margins located 2 mm apical to the cemento-enamel junction. The molars were randomly allocated into five groups (n = 21) according to the cervical relocating materials used: Group I had no cervical margin relocation; Group II used a highly viscous glass ionomer; Group III used a highly-filled injectable resin composite; Group IV used a resin-modified glass ionomer; and Group V used a bioactive ionic resin. All groups received immediate dentin sealing before nanoceramic resin-based CAD/CAM onlay restorations. After the specimens were subjected to thermo-mechanical loading, they underwent fracture resistance testing and failure mode analysis.
Results
No statistically significant difference in fracture resistance was observed among the tested groups. Regarding the mode of failure, irreparable failure was significantly dominant, with no significant difference among the groups.
Conclusion
Employing injectable restorative materials for cervical margin relocation had no detrimental effect on the fracture resistance of molars receiving nanoceramic resin-based CAD/CAM onlay restorations.
Clinical Significance
CAD/CAM onlay restorations preceded by cervical margin relocation using injectable restorative materials could tolerate compressive loading comparably to those without cervical margin relocation.
期刊介绍:
The Journal of Esthetic and Restorative Dentistry (JERD) is the longest standing peer-reviewed journal devoted solely to advancing the knowledge and practice of esthetic dentistry. Its goal is to provide the very latest evidence-based information in the realm of contemporary interdisciplinary esthetic dentistry through high quality clinical papers, sound research reports and educational features.
The range of topics covered in the journal includes:
- Interdisciplinary esthetic concepts
- Implants
- Conservative adhesive restorations
- Tooth Whitening
- Prosthodontic materials and techniques
- Dental materials
- Orthodontic, periodontal and endodontic esthetics
- Esthetics related research
- Innovations in esthetics