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  Indian J Med Microbiol
 

Figure 4: (a) Scanning electron microscopic photograph of glass fiber post with phosphoric acid pretreatment showing surface modifications and glass fiber exposure. (b) Scanning electron microscopic photograph of quartz fiber post with phosphoric acid pretreatments showing surface modifications and quartz fiber exposure

Figure 4: (a) Scanning electron microscopic photograph of glass fiber post with phosphoric acid pretreatment showing surface modifications and glass fiber exposure. (b) Scanning electron microscopic photograph of quartz fiber post with phosphoric acid pretreatments showing surface modifications and quartz fiber exposure