Modeling thermal damage in skin from 2000-nm laser irradiation

Cornea thermal damage due to incidental continuous wave CO2 laser irradiation is studied numerically based on bio-heat equation. The interaction of laser with tissue leads to a rapid temperature increased in target and the nearby tissue. As the temperature of the eye surface reaches 44?C, a sensation of pain will cause aversion response of the reflex blink and/or shifting away from the source of pain. The aim of the work is to predict numerically the threshold limit of incidental laser power that causes damage to the anterior part of the cornea, which can be healed within 2-5 days as long as damage is not exceeding the outer part of the eye (epithelium). A finite element analysis is used to predict temperature distribution through the cornea where the necroses region can be obtained using thermal dose equation. The thermal dose that required for damaging the cornea is predicted from previously published experimental data on rhesus monkeys and used later as a limit for shrinkage to human cornea. The result of this work is compared by international standard of safety and a good nearby result is obtained which verified the result of this work.

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Effect of scanned quasi-cw CO2 laser irradiation on tissue thermal damage

Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards ◽

10.1117/12.182944 ◽

1994 ◽

Author(s):

Geoffrey Silver ◽

Norman S. Nishioka ◽

Jina Chung ◽

Yacov Domankevitz ◽

Dominic Bua ◽

...

Keyword(s):

Laser Irradiation ◽

Co2 Laser ◽

Thermal Damage ◽

Cw Co2 Laser

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Approximate Bayesian computation applied to the identification of thermal damage of biological tissues due to laser irradiation

International Journal of Thermal Sciences ◽

10.1016/j.ijthermalsci.2019.106243 ◽

2020 ◽

Vol 151 ◽

pp. 106243

Author(s):

Bruna R. Loiola ◽

Helcio R.B. Orlande ◽

George S. Dulikravich

Keyword(s):

Laser Irradiation ◽

Approximate Bayesian Computation ◽

Thermal Damage ◽

Biological Tissues ◽

Bayesian Computation ◽

Approximate Bayesian

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Compositional and structural changes of human dentin following caries removal by Er, Cr: YSGG laser irradiation in primary teeth

Journal of Clinical Pediatric Dentistry ◽

10.17796/jcpd.26.4.t314pk16058200v0 ◽

2002 ◽

Vol 26 (4) ◽

pp. 377-382 ◽

Cited By ~ 19

Author(s):

Mozammal Hossain ◽

Yukio Nakamura ◽

Yoshishige Yamada ◽

Yoshiko Murakami ◽

Koukichi Matsumoto

Keyword(s):

Laser Irradiation ◽

Structural Changes ◽

Primary Teeth ◽

Thermal Damage ◽

In Vitro Study ◽

Surface Characteristic ◽

Human Dentin ◽

Caries Removal ◽

Induced Changes

In this in vitro study, the compositional and structural changes of human dentin, and knoop harness of cavity floor following the removal of dental caries by Er,Cr:YSGG laser irradiation in primary teeth was compared with that of the conventional bur cavity. The results confirmed that laser irradiation revealed minimal thermal damage to the surrounding tissues, minimal thermal induced changes of dental hard tissue compositions, and favorable surface characteristic.

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