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Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach
Published on: August 24, 2018
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Influence of Preparation Reconstruction on the Compressive Strength of CAD/CAM Ceramic Inlays
Bruna Salamoni Sinhori1, Luiz Clovis Cardoso Vieira2, Luiz Narciso Baratieri2
1Professor Graduate Curses Operative Dentistry, University of Caxias do Sul, Caxias do Sul, RS, Brazil.
International Journal of Biomaterials
|February 5, 2019
Summary
Lithium disilicate ceramic inlays showed comparable compressive strength regardless of substrate (dentin or composite resin). While not matching sound teeth, these restorations are sufficient for chewing forces.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- Dental restorations aim to restore tooth function and strength.
- Lithium disilicate ceramics offer favorable aesthetics and mechanical properties for inlays.
- Understanding substrate influence on restoration strength is crucial for clinical success.
Purpose of the Study:
- To assess the impact of substrate (dentin vs. composite resin) on the compressive strength of lithium disilicate ceramic inlays.
- To compare the fracture strength of restored teeth to that of nonrestored teeth.
Main Methods:
- Thirty human maxillary third molars were prepared and divided into three groups: sound teeth (control), teeth with preparations in tooth structure, and teeth with composite resin build-up restored with lithium disilicate inlays.
- Standardized Class II MOD preparations were performed.
- Compressive strength testing was conducted at a crosshead speed of 1 mm/min.
Main Results:
- The fracture strength of sound teeth (control group) was significantly higher than both restored groups.
- No statistically significant difference in fracture strength was found between the two groups of restored teeth (dentin substrate vs. composite resin substrate).
- Both lithium disilicate inlay groups demonstrated statistically equivalent fracture strengths.
Conclusions:
- The substrate material (dentin or composite resin) does not significantly affect the compressive strength of lithium disilicate ceramic inlays.
- While restored teeth did not achieve the strength of sound teeth, the lithium disilicate inlays provide sufficient strength to withstand physiological masticatory forces.
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