contributor author | R. Boehm | |
contributor author | J. Rich | |
contributor author | J. Webster | |
contributor author | S. Janke | |
date accessioned | 2017-05-08T23:02:28Z | |
date available | 2017-05-08T23:02:28Z | |
date copyright | November, 1977 | |
date issued | 1977 | |
identifier issn | 0148-0731 | |
identifier other | JBENDY-25540#189_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/89636 | |
description abstract | A detailed study is reported of the potential thermal stress effects and surface cracking of human teeth after absorption of laser energy. This study was motivated by the desire to define damage thresholds if lasers are used for preventive dentistry techniques. A large group of extracted teeth was exposed to manually pulsed bursts of energy of varying durations from a CW CO2 laser. The teeth were examined photographically under magnification before and after irradiation, using fluorescent dye to facilitate observation of cracks in the tooth surface. In an attempt to understand the cracking phenomena, predictions of the temperatures and thermal stresses were made. The tooth surface in the vicinity of the focused beam impingement was assumed to behave as a semi-infinite solid for the short periods of time considered. Estimated stresses where cracking occurred are compared in the paper to measured values of the ultimate strength of tooth enamel. Results are shown to be in reasonable agreement with predictions. Based on this work, a criterion is given for minimizing surface damage to the tooth. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Thermal Stress Effects and Surface Cracking Associated With Laser Use on Human Teeth | |
type | Journal Paper | |
journal volume | 99 | |
journal issue | 4 | |
journal title | Journal of Biomechanical Engineering | |
identifier doi | 10.1115/1.3426289 | |
journal fristpage | 189 | |
journal lastpage | 194 | |
identifier eissn | 1528-8951 | |
keywords | Lasers | |
keywords | Thermal stresses | |
keywords | Fracture (Process) | |
keywords | Human teeth | |
keywords | Tensile strength | |
keywords | Fracture (Materials) | |
keywords | Absorption | |
keywords | Irradiation (Radiation exposure) | |
keywords | Stress | |
keywords | Enameling AND Temperature | |
tree | Journal of Biomechanical Engineering:;1977:;volume( 099 ):;issue: 004 | |
contenttype | Fulltext | |