Behavior of the association between an oral protector and a polyamide reinforcement mesh in impact absorption at anterior maxillary region: in silico and in vitro analysis

• Grant number: 22/11307-9
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2023
• End date: January 31, 2025
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Tarcisio Jose de Arruda Paes Junior
• Grantee: Tarcisio Jose de Arruda Paes Junior
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil
• Associated researchers: Alexandre Luiz Souto Borges

Abstract

This study will evaluate in silico and in vitro the dentoalveolar responses in central incisors totrauma in the anterior region of the maxilla, with and without the use of mouthguard (MG) reinforced by polyamide mesh in three different locations. The study groups will be divided into skull without MG (WOMG); conventional MG in EVA (ethylene vinyl acetate) 4mm thick; MG in EVA 4mm thick with reinforcement at 1mm (MGRf1), 2mm (MGRf2) and 3mm (MGRf3) from the vestibular limit. The five groups will be modeled and dynamic explicit analysis will be performed simulating an impact of 500N through a steel sphere of 35mm in diameter and 7.8 g/cm3of density at 1m/s. The materials will be considered isotropic, homogeneous and linear. Thecontacts will follow the same physical conditions of the in vitro test (frictional and glued). Themeshes will be defined with tetrahedrons after 10% convergence. The deformations and maximumprincipal stresses in the teeth and maxilla will be presented in colorimetric graphs. In the in vitro study, a skull model will be printed in polylactic acid (PLA) covering the maxillary region and teeth individually in composite resin and the periodontal ligament will be simulated in polyether. To measure microdeformations, strain gauges will be placed in the alveolar process of the maxilla and in the center of the crowns of teeth 11 and 21, parallel to their long axis. The MG will be produced in EVA and reinforcements will be included according to each group (N=20). The impact will be carried out by means of a specific machine to be developed, with force within the elastic limit of the PLA in a horizontal direction parallel to the ground and perpendicular to the contact surface of the 35mm sphere. Data will be submitted to descriptive and inferential statistics after checking homogeneity and homoscedacity to choose the appropriate test. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

HADDAD E BORRO, LARISSA; DE QUEIROZ, TALITA SUELEN; DA CRUZ, BEATRIZ SERRALHEIRO; DEMACHKIA, AMIR MOHIDIN; BORGES, ALEXANDRE LUIZ SOUTO; TRIBST, JOAO PAULO MENDES; PAES JUNIOR, TARCISIO JOSE DE ARRUDA. Enhancing mouthguard longevity: Impact of surface treatment against aging from brushing and disinfectant exposure. DENTAL TRAUMATOLOGY, v. 40, n. 4, p. 7-pg., 2024-03-08. (22/11307-9)

DE QUEIROZ, TALITA SUELEN; DA CRUZ, BEATRIZ SERRALHEIRO; DEMACHKIA, AMIR MOHIDIN MOHAMED; BORGES, ALEXANDRE LUIZ SOUTO; TRIBST, JOAO PAULO MENDES; PAES JUNIOR, TARCISIO JOSE DE ARRUDA. Ergonomic Sports Mouthguards: A Narrative Literature Review and Future Perspectives. APPLIED SCIENCES-BASEL, v. 13, n. 20, p. 15-pg., 2023-10-01. (21/11159-7, 22/11307-9)