Mechanical behavior of prostheses / implant system in the anterior region of maxilla: analysis by the method of cycling mechanics

INTRODUCTION : The adequate three-dimensional positioning of implants is essential to ensure predictability in dental implant treatment. PURPOSE : Was to comparatively evaluate the mechanical behavior of the system prosthesis/implant in the anterior maxilla, differing the prosthetic connection and the placement of implants. MATERIAL AND METHOD : By a maxilla prototyped model the situations were studied: Group IC- implants in the central incisor positions and cantilevers in the lateral incisor positions; Group IL - implants in the lateral incisor positions and pontics in the central incisor positions; Group ICIL one implant in a lateral and one in a central incisor position, with a pontic and a cantilever in the other positions. For each situations were used the prosthetic connections, external hexagon, internal hexagon and Morse-taper. In fatigue test was applied load 100N of frequency 15Hz in the incisors cingulum 45° to the long axis of the tooth to simulate a masticatory movement. RESULT : After the fatigue test all models of all groups with all three types of connections prosthetic reached 1 million cycles without rupture occurred screw, prosthetic component or metallic structure. CONCLUSION : According to methodology and conditions studied, can be concluded that the mechanical behavior of the implant-supported rehabilitation was similar to the different positions of the dental implants and the different prosthetic connections.