Fracture resistance of endodontically treated premolars restored with CAD-CAM onlays
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Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Purpose: To evaluate the fracture resistance of endodontically treated premolars restored with CAD-CAM onlay restorations.
Methods: 60 extracted mandibular first premolars were selected and at first divided into three groups regarding treatment options: MOD onlay with buccal cusp coverage, MOD onlay with buccal cusp coverage + endodontic treatment, MOD onlay with buccal cusp coverage + endodontic treatment + fiber post. Then, all groups were divided into subgroups (n=10) according to the restorative material used: IPS e.max CAD and Lava Ultimate. Each group was submitted to 5,000 thermal cycles, embedded in acrylic resin and secured in a universal testing machine respectively. A compressive load was applied until fracture, at a crosshead speed of 0.5 mm/minute. Statistical significance among each group was analyzed using one-way ANOVA and Bonferroni tests.
Results: Statistically, endodontically treated IPS e.max onlays had numerically the lowest average fracture resistance [753.1 (± 224.9) N/mm² ] among all treatment options. IPS e.max onlays treated with fiber posts had significantly higher resistance than that of endodontically treated IPS e.max CAD group (P= 0.013). Endodontically treated teeth restored with Lava Ultimate onlays [1,381.0 (± 471.7) N/mm²] showed significantly higher averages of fracture resistance than IPS e.max CAD onlays.
Clinical significance: CAD-CAM composite (resin nanoceramic) onlays resist greater forces compared to ceramic restorations. Fiber posts could improve the fracture resistance of endodontically treated mandibular premolars following the ceramic CAD-CAM onlays.
Açıklama
Anahtar Kelimeler
Fracture Resistance, CAD-CAM Onlay Restorations
Kaynak
American Journal of Dentistry
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
35
Sayı
6
Künye
Ozan, G., Eren, M. M., Dikmen, B. Yıldız, E. (2022). Fracture resistance of endodontically treated premolars restored with CAD-CAM onlays. American Journal of Dentistry, 35(6), 308-314.
