Journal of the Serbian Chemical Society 2024 OnLine-First Issue 00, Pages: 29-29
https://doi.org/10.2298/JSC240118029C
Full text ( 733 KB)
Influence of the elasticity variation of the 3D printed PMMA structure on the axial tooth vibration
Cvetićanin Livija (University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia, Obuda University, Budapest, Hungary), cveticanin@uns.ac.rs
Prica Miljana (University of Novi Sad, Faculty of Technical Sciences, Novi Sad, Serbia)
Vujkov Sanja (University of Novi Sad, Faculty of Medicine, Department of Dentistry, Novi Sad, Serbia)
Recently, 3D printing with poly methyl methacrylate (PMMA) has been widely
used in dentistry: 3D printing is a suitable method for producing any
complex three-dimensional shape, and PMMA is a material that has suitable
properties in the oral cavity environment. That is why 3D printing is very
often used to make PMMA teeth. There is the impact between teeth during
chewing that causes shape variation and tooth vibration. As cyclic
vibrations adversely affect the durability of PMMA teeth, they must be
eliminated. The object of this work is to study the axial vibrations of a 3D
printed tooth, as well as to give recommendations for modifying the PMMA
structure with the aim of vibration dampening. Tooth vibration is
mathematically modeled and analytically solved. The obtained result provides
a link between the vibrational properties and the elasticity variation of
the PMMA material. The function that defines the change in elasticity of
PMMA depends on the "slow time". (The term "slow time" implies a product of
time and a parameter that is less than one). For a decreasing elasticity
function, the vibration is of damped type: for higher is the elasticity
reduction, the faster is the vibration decay. Based on the determined
elasticity function, the modification of the PMMA structure can be realized.
Authors propose the application of the obtained elasticity variation
function for programming 4D printing with modified PMMA.
Keywords: 3D printing, PMMA in dentistry, variable modulus of elasticity, axial vibration in tooth, analytic solving method, planning of 4D printing