Mathematical Simulation of Maxilla Biomechanics Restored with Fixed Implant-Supported Denture

• Published in: Journal of pharmaceutical sciences and research 2018-06, Vol.10 (6), p.1521-1524
• Main Authors: Olesova, V N, Shashmurina, V R, Shugailov, I A, Olesov, E E, Mirgazizov, M Z
• Format: Article
• Language: English
• Subjects: Biomechanics; Bones; Computers; Dental implants; Rehabilitation; Simulation; Teeth
• ISSN: 0975-1459

Materials And Methods The stress-strain state (SSS) of cortical and cancellous bone, titanium implants and ceramic denture teeth upon distributed vertical load of 150N and 250N applied to the anterior and posterior parts, respectively, of the denture was studied on the maxillary mathematical simulation model identical in size, structure and physico-mechanical properties to the real maxilla (Fig. 1, Table 1). Results And Discussion Under the load exerted upon the anterior and posterior parts of the maxillary fixed implant-supported denture, the maximum stress values in the bone tissue were localized around the implant neck spreading to the distant areas - the bottom of the nasal cavity, the walls of the maxillary sinus (Fig. 2-4). Upon mathematical simulation, the lowest stress values were found in the maxillary cancellous bone with the fixed implant-supported denture being under load, as well as in the implant materials and denture itself (being far from the strength values of metal alloys and ceramics), and therefore the results of the most unfavorable variant for biomechanics - with the load exerted on the posterior part of the maxillary fixed implant-retained denture - had been presented (Table 3). The reduction of implant diameters from 5.0 mm to 4.3 mm and 3.5 mm (with the equal length of 12.5 mm) increased the stress values to 4,4 MPa, 4,9 MPa and 6,0 MPa, respectively. [...]in the cancellous bone, regularities are observed in the dependence of stress values on the size and the placement technique of implants; the greatest stresses are characteristic for implants place by the all-on-4 treatment concept and zygomatic implants with the length equal to 8.0mm; taking into account the strength limits of the cancellous bone, it should be pointed out that in these situations the stress values in periimplant bone approach to the critical ones.