Influence of number and inclination angle of implants on stress distribution in mandibular cortical bone with All-on-4 Concept

Abstract

The use of 4 implants or inclined implants increased stress on peri-implant cortical bone. However, when used in conjunction with a short cantilever, inclined implants decreased stress on peri-implant cortical bone.

Numerical Study of the Effect of Dental Implant Inclination

“…Load transfer of inclined implant is frequently investigated in splinted configuration or implant supported fixtures (Behnaz et al 2015, Gul and Suca 2014, Markarian and Ueda 2007, Cağlar et al 2006, Almeida et al 2013, Hong et al 2012, Lan et al 2010, Takahashi, Shimamura and Sakurai 2010, Ueda et al 2004, Naini et al 2011. The attempt of this numerical study is to examine the effect of inclination of the implant embedded in the acrylate block, in the straightforward arrangement.…”

“…The impact of implant inclination on the surrounding structure has been frequently researched in the overdenture settings (Behnaz et al 2015, Gul and Suca 2014, Markarian and Ueda 2007, Cağlar et al 2006, Almeida et al 2013, Hong et al 2012, Lan et al 2010, Sljivic et al 2016, Takahashi, Shimamura and Sakurai 2010, Ueda et al 2004, Naini et al 2011, rather than in an isolated environment, as explained in Watanabe et al (2003). The intention in this study was to focus on the simpler loading conditions and to eliminate other systematical factors which arise due to the system complexity.…”

Stress analysis of different configurations of 3 implants to support a fixed prosthesis in an edentulous jaw

“…8,9 Increasing the implant diameter and tilting the distal implants have been proposed to improve the biomechanical behavior by increasing the contact surface area and reducing the average cantilever length of the prosthesis. [5][6][7]11,12 However, it is unclear how the number, diameter, and arrangement of the implants impact the biomechanical behavior of fixed implant-supported complete dentures. Given the absence of experimental studies that support the clinical use of this configuration, the aim of this study was to use linear three-dimensional (3D) finite element (FE) analysis to evaluate the stress distribution in the peri-implant bone and prosthetic components with different implant configurations.…”

“…1,2 Changes in the original protocol have been proposed to simplify and optimize the rehabilitation of edentulous patients, increasing access to treatment. [3][4][5][6][7][8][9] Branemark et al 3 initially proposed the use of 3 wide implants to support a fixed implant-supported prosthesis in the edentulous mandible, obtaining a success rate of 98% over 3 years of follow-up. However, this rehabilitation did not achieve similar results compared to conventional implant-support rehabilitations with immediate loading.…”

Micromotion analysis of different implant configuration, bone density, and crestal cortical bone thickness in immediately loaded mandibular full‐arch implant restorations: A nonlinear finite element study

“…[24][25][26][27] Tilting the distal implants reduces the cantilever length, resulting in decreased periimplant bone stress. 24,25 However, there have been few investigations into the effects of tilted implants on micromotion in an immediately loaded multiple-implant prosthesis.…”