Violation

In periodontal therapy, “guided tissue regeneration” is most successful in treating 1. horizontal bone loss. 2. a 3-walled infrabony defect. 3. a mandibular Class III furcation involvement. 4. a mandibular Class II furcation involvement

(1) and (3)

(2) and (4)

(1) (2) (3)

All of the above.

(4) only

Please describe the matter of abuse