The effectiveness of therapeutic ultrasound to the mechanically damaged chondrocyte culture.

Objective: This study aimed to evaluate the efficacy of low intensity (0.1-0.8 Watt/cm) pulsed ultrasound on chondrocyte cell proliferation and migration.

Three-dimensional finite element analysis of stress distribution of two-retainer and single-retainer all-ceramic resin-bonded fixed partial dentures.

Objective: A long-term clinical study previously stated that adhesively luted resin-bonded fixed partial dentures (RBFPDs) with two retainers exhibited two complications (loss of adhesion or fracture between retainer and pontic) when compared to RBFPDs with a single retainer. The reasons for these complications were not reported. The aim of this study was to evaluate the stress distribution of two-retainer and singleretainer zirconium dioxide RBFPDs by using three-dimensional finite element analysis (3D FEA).