Histological photomicrographs of the prepared alveolar bone edge stained en bloc with basic fuchsin. Stained areas appear orange under green epifluorescence (magnifications ×100 and ×200). (A, B) Bone edge prepared with the rotary bur. Smooth cut bone surface with few isolated cracks. (C, D) Bone edge prepared with the piezoelectric device. Irregular cut bone surface with loosened hard substance