In EPT most efficient site of testing for posterior is:
For incisors- incisal edge is the most efficient site.
For posteriors- mesiobuccal cus tip is the best site.
Cusp tip of the mesiobuccal cusp
Cusp tip of the mesiolingual cusp.
Equal over all the cus tips.
None.
Cusp tip of the mesiobuccal cusp