Figure 1.

A) Image and measurements of implant-placement sites in the posterior region of the mandible, 4 mm to 20 mm posterior to the mental foramen. The height (H), width (W), and thickness of the buccal, lingual, crestal and inferior cortical bone of the mandible were measured. The mean densities of the cancellous bone and the crestal cortical-bone of the implant area, and the buccal, lingual, and inferior cortical bone were measured. Cortical thickness; a = alveolar crest, b =inferior border, c = buccal, d = lingual. B) Distribution of the density of cancellous bone, C) Distribution of the density of crestal cortical-bone, D) Distribution of thickness of the crestal cortical-bone.