Fatigue limits of titanium-bar joints made with the laser and the electric resistance welding techniques: microstructural characterization and hardness properties

Abstract

Fatigue behavior of the titanium bars is of utmost importance for the safe and reliable operation of dental implants and prosthetic constructions based on these implants. To date, however, only few data are available on the fatigue strength of dental prostheses made with electric resistance welding and laser welding techniques. This in-vitro study highlighted that although the joints made with the laser welding approach are credited of a superior tensile strength, joints made with electric resistance welding exhibited double the minimum fatigue strength with respect to the joints made with laser welding (120 vs 60 N).

Mechanical and fatigue resistance of restorations supported by welded-framework and realized using computer-aided designed prosthetic shells: In vitro pilot study

“…The intra-oral welding technique allowed a quick and adequate rigid splinting of multiple implants for same-day immediate loading, resulting in a predictable fixation of implants in the early stages of bone healing with a significant reduction of the micromovement problem. 17 Welding the framework directly in the patient's mouth allows the creation of a precise and passive structure, without needing any correction or further components, such as those often necessary for CAD CAM-manufactured frameworks. 18 In vivo the implant rehabilitations are subjected to chewing load, which is a cyclic load.…”

“…The intra-oral welding technique allowed a quick and adequate rigid splinting of multiple implants for same-day immediate loading, resulting in a predictable xation of implants in the early stages of bone healing with a signi cant reduction of the micromovement problem [17].…”