Biomechanical three-dimensional finite-element analysis of maxillary prostheses with implants. Design of number and position of implants for maxillary prostheses after hemimaxillectomy

Biomechanical 3-Dimensional Finite Element Analysis of Obturator Protheses Retained with Zygomatic and Dental Implants in Maxillary Defects

“…After a maxillectomy operation, part of the maxilla and the buttresses are lost, and the oral cavity communicates with the nasal cavity and a maxillary sinus. This operation greatly impairs articulation, mastication, and speech, as well as causing facial disfigurement and difficulty in swallowing and deglutition [ 1 , 2 ]. In general, there are many alternatives for maxillary reconstruction, such as conventional obturator protheses, regional pedicled flaps and bone grafts with titanium plates or meshes, and zygomatic and dental implant-retained obturator protheses [ 2 , 3 ].…”

“…Maxillary obturator prostheses have a long history of effectively resolving the functional, cosmetic, and psychological problems associated with the maxillary defects, but the mobility of maxillary protheses impairs function. In maxillary defects, achieving success in retention and optimum stability of obturator prothesis by traditional techniques is very difficult [ 1 ] Conventional dental implants have been used to enhance the stability and retention of maxillofacial prosthetic obturators and to restore oral function [ 4 ]. Occasionally in such cases conventional dental implant treatment cannot be applied because an inadequate amount of maxillary bone remains following maxillectomy.…”

Effect of alveolar bone support on zygomatic implants in an extra-sinus position—a finite element analysis study

“…15 The stresses observed in the current study are similar to those found in corresponding models with zygomatic implants in an intra-sinus position. 7,13,16 The results of this study suggest that the support provided by alveolar bone is beneficial for zygomatic implants placed in an extra-sinus position. Although the amount of the implant that is supported by alveolar bone is very small compared to the zygomatic bone, this part of the implant is much closer to the force that is being applied.…”

Critical Aspects for Mechanical Simulation in Dental Implantology

“…The analysis criteria widely used in implant prosthodontics are: (1) von Mises stress (σ vM ) (Yokoyama, Wakabayashi et al 2005;Assuncao, Tabata et al 2008;Huang, Hsu et al 2008;Lim, Chew et al 2008;Rubo and Souza 2008;Schrotenboer et al 2008;Assuncao et al 2009;Assuncao et al 2009;Chaichanasiri, Nanakorn et al 2009;Ding et al 2009;Fazel, Aalai et al 2009;Gomes et al 2009;Kong et al 2009;Li, Kong et al 2009;Qian et al 2009;Abreu et al 2010;Ao et al 2010;Caglar et al 2010;Eraslan and Inan 2010;Eser et al 2010;Faegh and Muftu 2010;Gomes et al 2010;Miyamoto et al 2010;Okumura, Stegaroiu et al 2010;Sagat, Yalcin et al 2010;Takahashi et al 2010;Teixeira et al 2010;Winter et al 2010;Bevilacqua et al 2011;Burak Ozcelik, Ersoy et al 2011;de Almeida, Rocha et al 2011;Okumura et al 2011), (2) maximum and minimum principal elastic strain (Є max and Є min ) (Saab et al 2007;Qian, Todo et al 2009;Chou, Muftu et al 2010;Danza, Quaranta et al 2010;Eser, Tonuk et al 2010;Limbert et al 2010;Okumura, Stegaroiu et al 2010;de Almeida, Rocha et al 2011) and (3) maximum and minimum principal ...…”