An evaluation of ceramo-metal restorations repair using different bonding agents and surface treatments

Abstract EN

Background : Fracture of ceramo-metal restorations is considered a problem for both the dentist and the patient.

Many different bonding systems are currently available to repair ceramo-metal restorations intra- orally if they are clinically accepted.

Objective : This study was carried out with the purpose of testing shear bond strengths of composite to porcelain and nickel-chromium alloy using three different bonding agents (Excite, AdheSE, Prompt L-Pop) with four different surface treatments (sandblasting and etchant, diamond stone roughening, sandblasting and HF etching, no surface treatment).

Materials and Methods : A total of 120 samples, half of the samples were made of porcelain and the other half were made of nickel-chromium alloy.

Each half was divided into three equal main groups each of 20 samples, according to the bonding agent used.

Each main group was subdivided into four subgroups five samples each, according to the surface treatment procedure done.

After the application and curing of bonding agents, a microhybride light-cured composite (Tetric Ceram) was built over specimens.

After thermal cycling, shear bond strength of each bonded sample was tested using a universal testing machine at a cross-head speed of 0.5 mm / min, All results were tabulated and statistically analyzed.

Results and Conclusions : Results reveal that the highest shear bond strength value between composite and porcelain was obtained when Excite was used.

In metal groups, the AdheSE bonding agent showed the highest shear bond strength values.

It was also observed that sandblasting followed by HF acid etching produced the most effective treatment method for porcelain and metal surfaces.