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Comparison between direct chairside and digitally fabricated temporary crowns
Adil O Abdullah1,2, Sarah Pollington2, Yi Liu1
1Stomatology Research Center, School of Stomatology, China Medical University.
Dental Materials Journal
|August 24, 2018
Summary
Computer-aided design/computer-aided manufacturing (CAD/CAM) temporary crowns exhibit superior mechanical properties compared to direct chairside temporary crowns. This includes better marginal fit, internal fit, and fracture strength, ensuring more successful definitive restorations.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- The mechanical integrity of temporary dental crowns is vital for the success of final restorations.
- Evaluating the performance of CAD/CAM temporary crowns against traditional direct chairside methods is essential for clinical decision-making.
Purpose of the Study:
- To compare the marginal fit, internal fit, fracture strength, and fracture mode of CAD/CAM temporary crowns with direct chairside temporary crowns.
- To determine if CAD/CAM technology offers superior mechanical properties for temporary dental restorations.
Main Methods:
- Four groups of temporary crowns (n=10 each) were fabricated using VITA CAD-Temp, ArtBloc Temp (CAD/CAM), PMMA DISK, and Acrytemp (direct chairside).
- A prepared Frasaco tooth model was used for crown fabrication and testing.
- Mechanical properties including marginal gap, internal gap, and fracture strength were assessed using statistical analysis (SPSS v.20).
Main Results:
- Statistically significant differences (p<0.01) were observed in average marginal gap, internal gap, and fracture strength between the groups.
- CAD/CAM temporary crowns demonstrated significantly better marginal and internal fit, along with higher fracture strength.
- The mode of fracture showed no statistically significant difference (p>0.05) among the tested groups.
Conclusions:
- CAD/CAM temporary crowns exhibit superior mechanical properties compared to direct chairside fabricated temporary crowns.
- The findings suggest that CAD/CAM technology can enhance the reliability and performance of temporary dental restorations.
- Improved mechanical properties of CAD/CAM temporary crowns may contribute to better outcomes for definitive restorations.
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