Digital design and fabrication of simulation model for measuring orthodontic force

Abstract

Three dimensional (3D) forces are the key factors for determining movement of teeth during orthodontic treatment. Designing precise forces and torques on tooth before treatment can result accurate tooth movements, but it is too difficult to realize. In orthodontic biomechanical systems, the periodontal tissues, including bones, teeth, and periodontal ligaments (PDL), are affected by braces, and measuring the forces applied on the teeth by braces should be based on a simulated model composed of these three types of tissues. This study explores the design and fabrication of a simulated oral model for 3D orthodontic force measurements. Based on medical image processing, tissue reconstruction, 3D printing, and PDL simulation and testing, a model for measuring force was designed and fabricated, which can potentially be used for force prediction, design of treatment plans, and precise clinical operation. The experiment illustrated that bi-component silicones with 2:8 ratios had similar mechanical properties to PDL, and with a positioning guide, the teeth were assembled in the mandible sockets accurately, and so a customized oral model for 3D orthodontic force measurement was created.

Analysis of biomechanical behavior of 3D printed mandibular graft with porous scaffold structure designed by topological optimization

“…Therefore, a mandibular model should be treated as an inhomogeneous material. Calculations of elastic modulus of bone in relation to bone mass density and Hounsfield unit are expressed in the following equations [38]:where, ρ is the density, HU is the Hounsfield unit. ; E is the modulus of elasticity.…”

Mechanical behaviour of 3D printed vs thermoformed clear dental aligner materials under non-linear compressive loading using FEM

“…The use of FEA/FEM, both as digital design, fabrication and performance analysis tool within the dental product sector is essential including the design and fabrication of simulation models for measuring orthodontic forces [19], FEA analysis of force systems during bodily tooth movement with plastic aligners and composite attachments [20], FEA of in-vitro de-bonding of orthodontic retainers [21] and computational design, and experimental verification of thermoplastic polymeric orthodontic aligners [22,23].…”

3D Printing and Digital Processing Techniques in Dentistry: A Review of Literature

“…In addition, the porous structure can affect the cell activity of Ti scaffold. A few hundred microns of surface pore size allows sufficient free space for the growth of the internal bone and for the delivery of oxygen and nutrients in the body and for the excretion of waste, which is necessary for strong fixation of Ti scaffolds with long‐term reliability …”

“…The use of these three tissue simulation models is a critical step in measuring the force of the teeth with braces . Based on medical image processing, tissue reconstruction, 3D printing, as well as PDL simulation and testing, a model for measuring force has been designed and fabricated, which can be potentially applied for force prediction, treatment planning design and precise medical operation …”