Abstract
The mechanical properties and the thickness of the resin cement agents used for bonding inlay bridges can modify the clinical performance of the restoration such as debonding or prosthetic materials fracture. Thus, the aim of this study was to evaluate the stress distribution and the maximum strain generated by resin cements with different elastic moduli and thicknesses used to cement resin-bonded fixed partial denture (RBFPD). A three-dimensional (3D) finite element analysis (FEA) was used, and a 3D model was created based on a Cone-Beam Computed Tomography system (CBCT). The model was analyzed by the Ansys software. The model fixation occurred at the root of the abutment teeth and an axial load of 300 N was applied on the occlusal surface of the pontic. The highest stress value was observed for the Variolink 0.4 group (1.76 × 106 Pa), while the lowest was noted for the Panavia 0.2 group (1.07 × 106 Pa). Furthermore, the highest total deformation value was found for the Variolink 0.2 group (3.36 × 10−4 m), while the lowest was observed for the Panavia 0.4 group (2.33 × 10−4 m). By means of this FEA, 0.2 mm layer Panavia F2.0 seemed to exhibit a more favorable stress distribution when used for cementation of posterior zirconium-dioxide-based RBFPD. However, both studied materials possessed clinically acceptable properties.
Highlights
Introduction iationsThe ideal treatment option is to replace a missing tooth with a dental implant [1].this option can be expensive, and many complications may occur due to medical and surgical conditions [2]
An alternative treatment would be the conventional three-unit porcelain fused to metal (PFM) bridge
Results localized among the bridge on the connector area of the pontic in all the evaluated study
Summary
The ideal treatment option is to replace a missing tooth with a dental implant [1] This option can be expensive, and many complications may occur due to medical (i.e., uncontrolled diabetes, several cancer therapies) and surgical conditions (i.e., insufficient bone volume) [2]. In these cases, an alternative treatment would be the conventional three-unit porcelain fused to metal (PFM) bridge. When preparing a tooth for a full-coverage crown, approximately 63% to 73% of its coronal structure is inevitably lost [3].
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