Which of the following treatment options are available for Division–b bone: (A) Modification into division A bone by augmentation, (B) Use of narrow diameter implants, (C) Modification to other division by osteoplasty, (D) All of the above
Answer is D. Three treatment options are available for the Division B edentulous ridge: 

Modify the existing Division B ridge to another division by osteoplasty, to permit the placement of root-form implants 4 mm or greater in width. 
Insert a narrow Division B root-form implant. 
Modify the existing Division B bone into Division A by augmentation.