International Journal of Oral Health & Dental Management

Abstract

Finite Element Study of Fracture Strength of Two Different Resin Bonded Bridge Designs

Amr Touny Abbas, Enas Fateh Elbab, Manal Rafie, Mohamed Eldenary.

Resin-bonded fixed dental prostheses had variable popularity since the technique for splinting mandibular anterior teeth with a perforated metal casting was described by Rochette. His work was then suggested as an alternative to conventional metal-ceramic fixed FDPs and its substantial removal of tooth structure needed to create strong, anatomically contoured, and esthetic restorations.

The most accepted design for resin bonded bridge is covering the maximum area of palatal or lingual surface of the abutment which give moderate fracture strength in low stress area like lateral incisor, in this research we tried to compare that conventional design for restoring upper lateral incisor with other more conservative one (by reducing the retainer size) that was proposed to enhance esthetic and fracture strength.

Finite element analysis (using solid work software) was used to compare fracture strength of three different restorative material used (PFM, IPS Empress &Vita In-Ceram zirconium) simulation of occlusal load on the pontic portion of the restoration (solid work was fed by all the individual properties to predict the behavior of the actual object).

This study proved that the fracture strength of the proposed conservative design may exceed that of the conventional design.