Modeling the Contact Interaction of a Pair of Antagonist Teeth through Individual Protective Mouthguards of Different Geometric Configuration

Abstract

This study carried out modeling of the contact between a pair of antagonist teeth with/without individual mouthguards with different geometric configurations. Comparisons of the stress–strain state of teeth interacting through a multilayer mouthguard EVA and multilayer mouthguards with an A-silicon interlayer were performed. The influence of the intermediate layer geometry of A-silicone in a multilayer mouthguard with an A-silicon interlayer on the stress–strain state of the human dentition was considered. The teeth geometry was obtained by computed tomography data and patient dental impressions. The contact 2D problem had a constant thickness, frictional contact deformation, and large deformations in the mouthguard. The strain–stress analysis of the biomechanical model was performed by elastoplastic stress–strain theory. Four geometric configurations of the mouthguard were considered within a wide range of functional loads varied from 50 to 300 N. The stress–strain distributions in a teeth pair during contact interaction at different levels of the physiological loads were obtained. The dependences of the maximum level of stress intensity and the plastic deformation intensity were established, and the contact parameters near the occlusion zone were considered. It was found that when using a multilayer mouthguard with an A-silicone interlayer, there is a significant decrease in the stress intensity level in the hard tissues of the teeth, more than eight and four times for the teeth of the upper and lower teeth, respectively.

Sports mouthguard overview: Materials, fabrication techniques, existing standards, and future research needs

“…[59][60][61] EVA material variations have included silver nanoparticles to add antibacterial properties, 62 and additions to enhance shock absorbance have included porous rubber, silicone interlayers, 63 silicon nylon mesh, 64,65 and urethane modifications. 66 Additional performance-enhancing adaptations have included internal air cells either alone, 67,68 or combined with hard material inserts, 69 closed cell foam, 67 A-silicone interlayers, 70 and "honeycomb" internal EVA mesh. 68 Other materials considered and used include controlled microstructure polystyrenepolyolefin copolymer-based materials that are proposed to provide enhanced performance compared to EVA, 61,71 increased flexibility afforded by thermosetting ternary novel thiolene "click" polymer systems, modified with urethane as well as acrylate, 55,56 and polyolefin copolymer-based materials that offer lower water absorption and higher impact resistance than EVA.…”

Numerical Modeling of a New Type of Prosthetic Restoration for Non-Carious Cervical Lesions

“…Creating complete parameterized tooth geometry is a complex process. The modeling of teeth with a truncated root system [ 4 , 30 , 59 ] and without taking into account the root system [ 47 , 60 , 61 ] is often encountered in practice. Such limitations can have a significant impact on the numerical simulation results.…”

Numerical Study of the Mechanical Behaviour of Wedge-Shaped Defect Filling Materials

“…The mathematical problem statement is described in [ 38 ], and it includes equilibrium equations and physical and geometric relations, as well as contact boundary conditions. The task was implemented as a 3D problem.…”