<prompt> Which of the following is not true, regarding abutment selection for overdenture fabrication?Abutment should have healthy periodontal tissuesIf bone loss is present, teeth should not be selected as overdenture abutmentsA circumferential band of attached gingiva should be presentIf a tooth has grade III mobility, it should not be selected as overdenture abutment  <response>: If mild to moderate bone loss is present, change in crown:root ratio can make the tooth suitable as an overdenture abutment. 