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Abstract
To investigate the effect of Er:YAG laser treatment on lipopolysaccharide (LPS) clearance and fibroblast adhesion on titanium disks. Grade IV titanium discs (n = 216) were used and allocated to 6 groups. Group 1 was the negative control without Porphyromonas gingivalis inoculation. Discs in Groups 2–6 were incubated with P. gingivalis to form a biofilm. Group 3 received 0.12% chlorhexidine irrigation and Group 4 received titanium curettage to remove the biofilm. Group 5 was treated with Er:YAG laser irradiation and Group 6 was treated with titanium curettage plus Er:YAG laser irradiation. The contact angle and surface roughness were measured after the various treatments. The surface microstructure and residual bacteria were examined using scanning electron microscopy and confocal laser scanning microscopy, respectively. Residual LPS was examined using a limulus amoebocyte lysate assay and human gingival fibroblast adhesion was quantified using fluorescent microscopy. Curettage plus Er:YAG laser irradiation was the most effective method for removing bacteria and LPS. No significant difference in the amount of fibroblast adhesion was found between the control and Group 6. Combined use of Er:YAG laser irradiation and curettage optimizes LPS clearance and fibroblast adhesion on titanium discs.
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Details
1 National Taiwan University Hospital, Department of Dentistry, Taipei, Taiwan (GRID:grid.412094.a) (ISNI:0000 0004 0572 7815); National Taiwan University, School of Dentistry, Taipei, Taiwan (GRID:grid.19188.39) (ISNI:0000 0004 0546 0241)
2 National Taiwan University Hospital, Department of Dentistry, Taipei, Taiwan (GRID:grid.412094.a) (ISNI:0000 0004 0572 7815); National Taiwan University, Graduate Institute of Oral Biology, School of Dentistry, Taipei, Taiwan (GRID:grid.19188.39) (ISNI:0000 0004 0546 0241)
3 National Taiwan University Hospital, Department of Dentistry, Taipei, Taiwan (GRID:grid.412094.a) (ISNI:0000 0004 0572 7815); National Taiwan University and National Taiwan University Hospital, Graduate Institute of Clinical Dentistry, School of Dentistry, Taipei, Taiwan (GRID:grid.412094.a) (ISNI:0000 0004 0572 7815)
4 National Taiwan University, Graduate Institute of Biomedical Electronics and Bioinformatics, College of Electrical Engineering and Computer Science, Taipei, Taiwan (GRID:grid.19188.39) (ISNI:0000 0004 0546 0241)
5 Kaohsiung Medical University, College of Life Science, Kaohsiung, Taiwan (GRID:grid.412019.f) (ISNI:0000 0000 9476 5696)