A comparative study has been made of human and great ape molar tooth enamel. Nanoindentation techniques are used to map profiles of elastic modulus and hardness across sections from the enamel-dentin junction to the outer tooth surface. The measured data profiles overlap between species, suggesting a degree of commonality in material properties. Using established deformation and fracture relati...

The aim of this work was to create digitally phase-shift images avoiding the mechanical adjustments of the PZT, testing them with the digital shearography method. It was tested using a well-known object, a cantilever beam of aluminium under deformation, and a tooth. The results presented the ability to create the deformation map and curves with reliability and sensitivity, reducing the cost, an...

This paper presents a method for effectively modeling the outer surfaces of inlay/onlay prostheses restoring teeth that are partially destroyed. We exploit 3D mesh deformation techniques: direct manipulation free-form deformation (DMFFD) [9] and multiple wires deformation (MWD) [10] with three kinds of information: standard teeth models, scanned mesh data from the plaster cast of a patient's to...

For normal healthy teeth, the percussive energy generated by mastication is attenuated by the periodontal ligament at the healthy bone/natural tooth interface. However, when a natural tooth must be replaced by an implant because of damage or disease, the ligament is lost and the implant will transmit the percussive forces to the bone directly. Studies have evaluated the deformation distribution...

Introduction: Torque in orthodontics is vital in final positioning of the teeth during fixed appliance therapy. Torqueing of archwires is a significant factor in transferring the applied forces to the bracket which might cause deformation of the slot. Any deformation in the bracket slot can vary the torque prescription and thus can affect the tooth position. Aim: To evaluate and compare the def...

P iezoelectricity may be a means of achieving physiologic tooth movement. The generation of piezoelectricity in response to the mechanical deformation of bone has been reported by a number of researchers. l-6 When bone is deformed, there are generated piezoelectric charges which vary directly with the magnitude of the induced stress.6 These charges induce microcurrents to flow through bone and ...

Gear transmission systems are widely used in various fields. The occurrence of gear cracks, tooth pitting, and other faults will lead to the dynamic characteristics deterioration system. In order calculate meshing stiffness faulty pairs more effectively precisely, this article improves loaded contact analysis (LTCA) method by analyzing influence different fault types on deformation, including b...