Bitewing x ray focuses on blank
Crown
Periapical focuses on blank
Whole tooth
A bite wing x ray should include these two things within view
Opposing crowns, top and bottom alveolar bones
Peri apicals include the blank within view unlike bitewings
Apex of root
Topographical occlusal is aka blank
Cross sectional occlusal, posterior occlusal
Three intraoral radiographs
Periapical, bitewing, occlusal