A three-dimensional finite element study on the biomechanical behavior of an FGBM dental implant in surrounding bone

Optimum Functionally Gradient Materials for Dental Implant Using Simulated Annealing

“…In this study, the configuration of FGM dental implant follows the patterns from literature (Wang et al, 2007;Yang & Xiang, 2007). The material gradient is governed by a power law with parameter m, as in Equation (1).…”

“…The material gradient is governed by a power law with parameter m, as in Equation (1). The volume fractions of the two-phase composite FGM dental implant can be calculated from the following equations (Hedia, 2005;Wang et al, 2007;Yang & Xiang, 2007):…”

“…HAP inclusion in forming the dental implant material can bring about an enhanced biocompatibility with the native hosting tissues. The main advantages of using FGM dental implant are: 1) reduction of stress shielding effect on the surrounding bones that usually arises in the presence of fully metallic implants (Hedia, 2005), 2) improvement of biocompatibility with bone tissues (Watari et al, 2004), 3) preventing the thermal-mechanical failure at the interface of HAP coated metallic implants (Wang et al, 2007) and 4) meeting the biomechanical requirements at each region of the bone while enhance the bone remodeling, hereby maintaining the bone's health status (Yang & Xiang, 2007). The latter is more related to volume fraction of FGM.…”

“…The other issue needs to be systematically studied is how to devise an optimal FGM pattern for dental implant application. It has been widely accepted that a mating mechanical property to the host bone should be made in order to avoid stress shielding (Hedia & Mahmoud, 2004;Hedia et al, 2006) and promote osseointegration and bone remodeling (Chu et al, 2006;Yang & Xiang, 2007). However, there are few reports available which examine whether or not a mating property could result in the best remodeling consequence and ensure a long-term success.…”

Studying the Effect of the Preload Induced by Screw Tightening on Stress Distribution of a Dental Implant

“…Thus, long-term stability requires to be assured against fatigue damage, and it causes the requirement for establishing the structural stability implant itself along with the stability of adjacent osseous tissues surrounding the fixture and jaw bone (Su Bae & Jeong, 2011 high stability of the implant against cyclic loads, while thinness of the cortical bone along with low rigidity and low density of the jaw bone leads to low stability of the implant. Also, studies have shown that stress concentration in the cortical bone is much greater than the stress concentration in the cancellous bone (Guan et al, 2009;Yang & Xiang, 2007).…”