Evaluation of the Fracture Strength of Different CAD/CAM Inlay Restorations After Accelerated Aging
Background: The purpose of this study was to compare the fracture resistance of inlay restorations manufactured by CAD/CAM using different materials after accelerated artificial aging.Methods: Class I inlay preparations were made for 40 mandibular molar teeth. The teeth were allocated into four grou...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Selcuk University Press
2019-08-01
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| Series: | Selcuk Dental Journal |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/892005 |
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| Summary: | Background: The purpose of this study was to compare the fracture
resistance of inlay restorations manufactured by CAD/CAM using different materials
after accelerated artificial aging.Methods: Class I inlay preparations were made for 40
mandibular molar teeth. The teeth were allocated into four groups (n=10)
according to the type of manufacturing material used: feldspathic-ceramic
(CEREC blocks); leucite-based glass-ceramic (IPS Empress CAD); resin
nano-ceramic (Lava Ultimate); and a control (intact teeth). After obtaining
digital impressions, restorations were designed and milled with CAD/CAM. Inlay
restorations were cemented to the inlay cavities using a dual-polymerizing
resin cement (Rely X Ultimate) and stored in distilled water at 37°C for a
week. All the samples were then exposed to accelerated ultraviolet aging for
300 hours. Finally, a compressive load was applied to the samples until
fracture. Statistical analysis was conducted using One-Way ANOVA and the Tukey
HSD test (a=0.05).Results: The mean fracture strength values of the groups were;
Control (1555.3±412.2 N)> Lava Ultimate (1525±394N)>IPS Empress CAD (1364.3±545.6N) > CEREC(1231.9±412.2N), respectively. However, there was no
statistically significant difference in mean fracture strength among different
inlay restoration groups (P>0.05).
Fifty percent of the both CEREC and IPS Empress CAD groups and 60% of the Lava Ultimate group showed
reparable fractures. Conclusion: The type of
material used did not influence the fracture strength of inlay-restored molar
teeth and inlay restorations did not weaken the strength of the restored
teeth. Therefore, all of the tested
materials are suitable for use in the posterior region.
Keywords: Inlay, fracture strength, resin nano-ceramic,
ceramic, CAD/CAM |
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| ISSN: | 2148-7529 |