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  Indian J Med Microbiol
 

Figure 6: Oval osseous window was carefully prepared on the lateral wall of the sinus using a large round diamond bur and bony window was kept aside to expose the sinus membrane without perforating it

Figure 6: Oval osseous window was carefully prepared on the lateral wall of the sinus using a large round diamond bur and bony window was kept aside to expose the sinus membrane without perforating it