Specificities of Molars Replacement by Implants Supported Crowns

The size and central anteroposterior positions of the first mandibular lower and upper molars make them essential for maintaining proper arch form and occlusal schemes [1,2], The use and success of osseointegrated dental implants for the rehabilitation of posterior partially edentulous jaw had been related in the literature by several studies [3-6]. These rehabilitations offers substantial advantages when compared with removable partial dentures: improved occlusion and support, simplification of the prosthesis, less invasive restorative procedures, improvement in oral health and bone maintenance [7,8]. According to Zarb et al. [9], The success rate 41 implants placed in the upper jaw was 97.6% jaw, versus 92.2% for the 64 implants placed in the lower jaw, after a loading period of 2.6 to 7.4 years.