Investigations on laser hard tissue ablation under various environments

Area of Science:

• Biomedical Engineering
• Laser Physics
• Materials Science

Background:

• Laser bone ablation is a precise surgical technique.
• Understanding environmental effects is crucial for optimizing laser performance.
• Er,Cr:YSGG lasers are utilized in bone surgery.

Purpose of the Study:

• To investigate the impact of various liquid environments on laser bone ablation.
• To evaluate energy loss and ablation performance under different conditions.
• To assess thermal side effects during laser osteotomy.

Main Methods:

• Utilized a long-pulsed Er,Cr:YSGG laser for bovine bone tibia ablation.
• Tested dry, wet (water, perfluorocarbon), and spray environmental conditions.
• Quantified ablation volume using optical coherence tomography (OCT).
• Assessed thermal effects via microscopy.

Main Results:

• Water and spray conditions attenuated the laser beam similarly.
• Perfluorocarbon offered higher transmission efficiency but caused some carbonization.
• Dry ablation resulted in significant carbonization due to heat accumulation.
• Wet (water) ablation achieved comparable volumes to dry without carbonization.
• Spray conditions provided clean cutting with slightly reduced efficiency.
• Liquid-assisted ablation enhanced material removal and provided cooling.

Conclusions:

• Liquid environments significantly benefit laser bone ablation.
• Water and spray conditions offer effective cooling and cleaning.
• Perfluorocarbon maximizes ablation volume but requires careful thermal management.
• Optimizing liquid environments can improve laser osteotomy outcomes.