When root canals are treated topically with
antibiotics rather than with disinfectants
1. a greater success rate results.
2. the same rules of mechanical
preparation and filling must be
observed.
3. treatment may be completed in fewer
appointments.
4. there is greater assurance that all
micro-organisms are destroyed.
5. there is a danger of sensitizing
patients to antibiotics.

(1) (2) (3)

(1) (3) (4)

(2) (4) (5)

All of the above.

(2) and (5)