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 Indian J Med Microbiol  
 

Figure 1 :Designed screw for orthodontic expansion (1: Cover; 2: Piston, 3: Coil, 4: Cylinder, 5: Assembled complex)

Figure 1 :Designed screw for orthodontic expansion (1: Cover; 2: Piston, 3: Coil, 4: Cylinder, 5: Assembled complex)