Thermal behavior of tissues having different porosities during continuous CO2 laser irradiation

Thermal increment due to ErCr:YSGG and CO2 laser irradiation of different implant surfaces. A pilot study.

OBJECTIVE An evaluation and comparison is made of the thermal increment at different implant surfaces during irradiation with CO2 and ErCr:YSGG lasers. STUDY DESIGN Five threaded and impacted implants with four types of surfaces were inserted in an adult pig rib: two implants with a hydroxyapatite surface (HA) (impacted and threaded, respectively), a machined titanium surface implant (TI mach...

Analysis of thermal relaxation during laser irradiation of tissue.

BACKGROUND AND OBJECTIVE Thermal relaxation time (tau(r)) is a commonly-used parameter for estimating the time required for heat to conduct away from a directly-heated tissue region. Previous studies have demonstrated that temperature superposition can occur during multiple-pulse irradiation, even if the interpulse time is considerably longer than tau(r). The objectives of this study were (1) t...

Optical-Thermal Phenomena in Polycrystalline Silicon MEMS During Laser Irradiation

Analyzing Thermal and Mechanical Effects of Pulsed Laser Irradiation on Tissues

Theoretical analysis of thermal damage in biological tissues caused by laser irradiation.

A bioheat transfer approach is proposed to study thermal damage in biological tissues caused by laser radiation. The laser light propagation in the tissue is first solved by using a robust seven-flux model in cylindrical coordinate system. The resulting spatial distribution of the absorbed laser energy is incorporated into the bioheat transfer equation for solving temperature response. Thermal ...