Format

Send to

Choose Destination
Niger J Clin Pract. 2018 Dec;21(12):1585-1589. doi: 10.4103/njcp.njcp_281_18.

Effect of different framework materials of resin-bonded bridges on load to fracture values and stress distribution.

Author information

1
Department of Prosthodontics, Kırıkkale University Faculty of Dentistry, Kırıkkale, Turkey.
2
Vocational School of Health Services, Kırıkkale University, Kırıkkale, Turkey.

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 and Methods:

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.

KEYWORDS:

Finite element analysis; fracture strength; resin-bonded bridges

PMID:
30560821
DOI:
10.4103/njcp.njcp_281_18
Free full text

Supplemental Content

Full text links

Icon for Medknow Publications and Media Pvt Ltd
Loading ...
Support Center