Biomechanical Comparative Evaluation of Atrophic Edentulous Maxilla Rehabilitation Using the All-on-6 Concept with Zygomatic Implant & Tilted Implant as Posterior Implant—Finite Element Analysis

Background: All-on-6 implants are a reliable and efficient full-arch restoration option in patients with atrophic maxilla. Aim: The present study aimed to evaluate and compare the distribution of stress surrounding implants and adjacent osseous structures by utilizing all-on-six tilted and zygomatic methodologies in the maxillary region by using Finite element (FEA) analysis. Material and methods: Two finite element models were constructed with CT images of 50 years female. Model 1 was constructed with zygomatic implants, while model 2 was constructed with tilted implants.A vertical force of 150N on anterior component and 300N on posterior component were applied and maximum stress and deformation was assessed. Results: In the present study, the von Mises stress on the bone, implant and overall was higher in the tilted implant model than the zygomatic implant model. Conclusion: The findings of the present study suggests that zygomatic implants help distribute occlusal loads more favorably, especially under horizontal and combined loading conditions in all-on-six configuration.