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  Indian J Med Microbiol
 

Figure 3: Scanning electron micrographs showing composite surfaces prepared by sandblasting (a), bur abrasion and phosphoric acid etching (b), hydrofluoric acid etching (c), 2 W laser (d), and 3 W laser (e)

Figure 3: Scanning electron micrographs showing composite surfaces prepared by sandblasting (a), bur abrasion and phosphoric acid etching (b), hydrofluoric acid etching (c), 2 W laser (d), and 3 W laser (e)