Final answer:
Cellulose hemostatic material is placed in the bone cavity after an apicoectomy to help stop bleeding and facilitate healing. Antibiotics are not used in this way, and antiseptics are the correct substances for microbial control on living tissues.
Step-by-step explanation:
After an apicoectomy and before suturing, Cellulose hemostatic material (Option C) should typically be placed in the bone cavity. This material aids in stopping bleeding by promoting clot formation, and it is important for proper healing of the surgical site.
In contrast, antibiotics like Penicillin or Tetracycline are not placed directly into the bone cavity, as their systemic administration is preferred when needed. Lyophilized bone chips can be used for bone regeneration, but not typically for standard apicoectomy procedures.
Regarding substances suitable for use on tissues for microbial control to prevent infection, antiseptic (Option B) is the correct choice. Antiseptics are antimicrobial substances that are applied to living tissue/skin to reduce the possibility of infection, whereas disinfectants are generally used on non-living surfaces.