Optimisation in multi-implant placement for completely edentulous mandibles

Although implants connections limit the effects of excessive occlusal forces, it seems obvious, according to the laws of elementary biomechanics, that the vertical axis resultant of mandibular implant systems should be aligned to an ideal closing axis perpendicularly to the closing radius. Consequently, three approaches (theoretical, experimental, and clinical) are used to propose a new way of positioning the implants for the mandibular implant-supported fixed dental prosthesis. The objective of this poster is to present a new approach while maintaining the principle of orthogonality at the closing radius. The theoretical part was supported by a cone beam computed tomography (CBCT) study on 211 half mandibles (from Vienna collection - R. Slavicek); the poster presents the experimental part. Keywords: Dental implant, dental biomechanics, occlusal forces, edentulous mandible