Fig. 1. Experimental setup of tooth hard tissue laser ablation

Fig. 2. Three-dimensional composite images of ablation craters in hard tooth tissues irradiated by laser. (a)－(d) Ablation crater in enamel; (e)－(h) ablation crater in dentin

Fig. 3. Statistical charts of occurrence probability of ablation of hard tooth tissues irradiated by CO₂ laser with 9.3 μm wavelength. (a) Enamel; (b) dentin

Fig. 4. Top views, three-dimensional composite images, and cross-sectional views of hard tooth tissues ablation craters irradiated by laser with energy density of 106.10 J/cm². (a)－(c) Dentin; (d)－(f) enamel

Fig. 5. Variation of geometric size of ablation craters produced by laser irradiating hard tooth tissues with energy density. (a) Variation of ablation depth with energy density; (b) variation of ablation diameter with energy density

Fig. 6. Variation of ablation efficiency of laser-irradiated tooth hard tissues with pulse energy density. (a) Enamel; (b) dentin

Fig. 7. Variation of ablation rate of laser-irradiated tooth hard tissues with energy density