Effect of different framework materials of resin-bonded bridges on load to fracture values and stress distribution.
Niger J Clin Pract
; 21(12): 1585-1589, 2018 Dec.
Article
em En
| MEDLINE
| ID: mdl-30560821
ABSTRACT
PURPOSE:
The aim of this study was to compare in vitro fracture strengths (FSs) of metal- and fiber-reinforced frameworks of resin-bonded bridges and to evaluate stress distribution with finite element analysis (FEA). MATERIALS ANDMETHODS:
Totally 80 extracted maxillary central and maxillary canine teeth were used for in vitro part of this study as two groups; metal-reinforced framework (n = 20) [(metal-supported resin-bonded bridge (MR-RB)] and fiber-reinforced frameworks (n = 20) [fiber-reinforced resin-bonded bridge (FR-RB) were prepared for three unit resin-bonded bridges. All bridges were loaded from lateral pontic at 1 mm/min crosshead speed and fracture values were recorded. Mann-Whitney U-test was used for statistical analysis, and fracture patterns were evaluated visually. FEA was carried out in the second part of the study, and stress distribution of MR-RB and FR-RB structures was analyzed using one of the models from in vitro specimens as main model.RESULTS:
The mean FSs of MR-RB and FR-RB were 637.47 ± 151.91 N and 224.86 ± 80.97 N, respectively. Fiber-reinforced specimens were found to distribute stress more homogeneous and connectors in each framework were the regions where stress concentrated mostly.CONCLUSION:
In vitro FSs of MR-RB and the stress concentration of the point that the forces were applied were higher as compared to other parts of the restoration. Furthermore, in contrast to FR-RB specimens, retainer tooth fractures were observed in MR-RB specimens.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Fraturas dos Dentes
/
Prótese Adesiva
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Resinas Compostas
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Cimentos de Resina
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Análise do Estresse Dentário
Limite:
Humans
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article