Three-dimensional finite-element analysis of a single implant-supported zirconia framework and its effect on stress distribution in D4 (maxilla) and D2 (mandible) bone quality

Abstract

The aim of this in-silico study was to compare stress distributions in implants and zirconia frameworks of mandibular and maxillary implant-supported crowns. For comparison, vertical and oblique loading forces were used. Three-dimensional finite-element implant models of a mandibular section of bone (D2) and a maxillary section of bone (D4) with missing second molars and their zirconium-based superstructures were used. Zimmer dental implants of 13 mm in length and 4.7 mm in diameter were modelled. A load of 200 N was applied toward vertical and oblique (30 to the vertical) directions. Maximum and minimum von Mises stress values of the implants and the zirconia framework were calculated. The highest stress value was concentrated in the zirconia framework of the maxillary implant-supported model with the oblique loading force (301.17 MPa). The lowest stress value was concentrated in the mandibular implant-supported model. And the stress values in the maxilla were higher than in the mandible. The maxilla (D4) showed higher stress values than in the mandible (D2), because the trabecular bone is weaker and less resistant to deformation than the cortical bone. Stress values with oblique loading forces were higher than with vertical loading forces. Because of the high Young's modulus of zirconia (low elastic properties), zirconia frameworks showed higher stress values than the implants.Keywords: finite element analysis (FEA); stress distribution; zirconia framework; bone quality; vertical and oblique loading force 3D three dimensional D2 mandibular section of bone D4 maxillary section of bone FE finite element FPDs fixed partial dentures Y-TZP yttrium oxide partially stabilized

Finite element analysis of the stress generated by the type of restorative material in the implant crown system

“…The results in this work demonstrated, as well as several researches using biomechanical analysis by the finite element method such as those by Silva et al (2014), Guven et al (2015), Kaleli et al (2017), Alvarez-Arenali et al (2017) and Arinc (2018), that oblique loads generate a higher concentration of stress in the entire implant/crown set (26,31,28,4,29). In addition, it was observed that the highest stress concentration on the implant was located in the neck region and inside its platform, that is, in the transition area between implant and crown, reinforcing the results obtained by Goodacre et al (2003) and Demachkia et al (2022) (32,33).…”

Investigating the Influence of All-Ceramic Prosthetic Materials on Implants and Their Effect on the Surrounding Bone: A Finite Element Analysis

“…Based on the Hounsfield unit, Misch [35] classified bone density into four types-D1, D2, D3 and D4 [36]. It is proven that more stresses are generated in D3 and D4 bone compared to D1 and D2 bone [26,37]. In the present study, also, higher stress was seen in the D4 bone than in the D2 bone [Figure 12].…”

Análise de fadiga em próteses odontológicas implanto-suportada sob carregamento multiaxiais.

“…O tipo do elemento selecionado para uso deve ser capaz de representar o verdadeiro comportamento físico do modelo com a maior aproximação possível ao sistema real (ARAT BILHAN et al, 2015;BULAQI et al, 2015a;GUVEN et al, 2015;HASAN et al, 2015;TORCATO et al, 2014 ABUHUSSEIN et al, 2010;AYLLÓN et al, 2014b;DUNDAR et al, 2016;FAEGH;MÜFTÜ, 2010;HERNANDEZ-RODRIGUEZ et al, 2015;LEE et al, 2010;LIN et al, 2009;PAN et al, 2015;SHEMTOV-YONA et al, 2014c;WOLFF et al, 2014). A idéia foi aplicar condições de restrição de movimentos para simular condições reais na seção da mandíbula.…”