Performance of bulk-fill versus conventional nanocomposite resin restorations supporting the occlusal rests of removable partial dentures: An in vitro investigation

Mesallum, Enas E.; Aziz, Possy Moustafa Abd El; Swelem, Amal A.

doi:10.1016/j.prosdent.2023.03.024

Cited by 1 publication

(1 citation statement)

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“…Similarly, other studies reported similar results of comparable strength of different types of composite resins [ 11 , 19 , 20 ]. Furthermore, Mesallum et al [ 27 ] reported a similarity in the fracture behavior of different composite resins supporting occlusal rests of RPDs under functional loading.…”

Section: Discussionmentioning

confidence: 99%

Fracture Strength of Composite Rest Seats: An In Vitro Comparative Study of Different Composite versus Amalgam Restorations

et al. 2023

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Occlusal rest provides support for removable partial dentures (RPD). Rest seats are ideally prepared in enamel, but the abutment teeth might be restored or need restorations. This study compared the fracture strength of abutments restored with composite to amalgam restorations after rest seat preparation. Disto-occlusal cavities were prepared in 30 extracted human maxillary premolars. The specimens were allocated in three groups (n = 10) based on the type of restoration. All the specimens were exposed to thermomechanical aging followed by cycling loading. Fracture strength was tested using a universal testing machine, and then, the fracture mode was recorded. The data were analyzed using Kruskal–Wallis test with a significance level set at 0.05. The fracture mode was recorded as catastrophic or non-catastrophic. The fracture strength between all tested groups showed no significant difference. The highest and lowest fracture strength were recorded on amalgam and Tetric N-Ceram groups, respectively. Composite Tetric N-Ceram showed equal distribution of fracture sites on the restorative materials and teeth, it also displayed the highest number of non-catastrophic fractures unlike other groups where the fracture occurred more within the restorations. The fracture strength of composite was comparable to that of amalgam restorations with prepared rest seats.

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Section: Discussionmentioning

confidence: 99%