<prompt> What are the objectives of furcation therapy:Facilitate maintenance.Prevent further attachment loss.Obliterate the furcation defects as a periodontal maintenance problem.All of the above.  <response>: The objectives of furcation therapy are toFacilitate maintenancePrevent further attachment loss andObliterate the furcation defects as a periodontal maintenance problem. The selection of therapeutic mode varies with the class of furcation involvement, the extent and configuration of bone loss, and other anatomic factors. 