Efficient Cleaning of Femtosecond Laser Ablation on Tooth Surfaces

Zhixiang Gu; Feng Pei; Ruixiang Liu; Yi Xiao; Jianquan Li; Na Liu; Sizhu Wu

doi:10.3788/LOP241738

Laser & Optoelectronics Progress, Volume. 62, Issue 5, 0517001(2025)

Efficient Cleaning of Femtosecond Laser Ablation on Tooth Surfaces

Zhixiang Gu^1,4、*, Feng Pei^1,2, Ruixiang Liu^1,2, Yi Xiao^1,4, Jianquan Li¹, Na Liu⁵, and Sizhu Wu^1,2,3

¹School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology, Hefei 230009, Anhui , China

²Intelligent Interconnection System Anhui Provincial Laboratory , Hefei University of Technology, Hefei 230009, Anhui , China

³Anhui Provincial Key Laboratory of Measurement Theory and Precision Instruments, Hefei University of Technology, Hefei 230009, Anhui , China

⁴School of Mechanical Engineering, Nantong Vocational University, Nantong 226007, Jiangsu , China

⁵The First Affiliated Hospital of Anhui Medical University, Hefei 230022, Anhui , China

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Figures & Tables(8)

Fig. 1. Femtosecond laser ablation tooth flow chart

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Fig. 2. Femtosecond laser processing optical path system diagram

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Fig. 3. Femtosecond laser tooth ablation mechanism diagram

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Fig. 4. Experimental results of changing laser scanning speed. (a) G4 group tooth before and after processing; (b) gray surface histogram of G4 group tooth; (c) gray mean value before and after tooth processing when changing laser scanning speed; (d) effect of laser scanning speed on cleaning efficiency

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Fig. 5. Experimental results of changing laser power. (a) G8 group tooth before and after processing; (b) gray surface histogram of G8 group tooth; (c) gray mean value before and after tooth processing when changing laser power; (d) effect of laser power on cleaning efficiency

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Fig. 6. Experimental results of changing laser line spacing. (a) G12 group tooth before and after processing; (b) gray surface histogram of G12 group tooth; (c) gray mean value before and after tooth processing when changing laser line spacing; (d) effect of laser line spacing on cleaning efficiency

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Table 1. Twelve groups of experimental processing parameters
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Table 1. Twelve groups of experimental processing parameters
Item G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12
Laser scanning speed /（mm/s） 20 15 10 5 5 5 5 5 5 5 5 5
Laser power /mW 350 350 350 350 250 350 450 550 550 550 550 550
Laser line spacing /mm 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.09 0.05 0.03 0.01

Table 2. Twelve groups of experimental results

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Table 2. Twelve groups of experimental results

No.	Gray mean（before processing）	Gray mean（after processing）	Difference value	MSE（before processing）	MSE（after processing）	Relative changeof gray level /%
G1	116	129	13	43	40	11.2
G2	114	126	12	25	24	10.5
G3	111	137	26	33	32	23.4
G4	99	138	39	24	27	39.4
G5	122	136	15	34	36	12.3
G6	128	157	29	29	34	22.7
G7	116	154	38	26	30	32.8
G8	93	151	58	22	32	62.4
G9	146	163	17	31	30	11.6
G10	131	152	21	34	34	16.0
G11	123	150	27	37	36	22.0
G12	127	158	31	35	37	24.4

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Zhixiang Gu, Feng Pei, Ruixiang Liu, Yi Xiao, Jianquan Li, Na Liu, Sizhu Wu. Efficient Cleaning of Femtosecond Laser Ablation on Tooth Surfaces[J]. Laser & Optoelectronics Progress, 2025, 62(5): 0517001

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