*2.2. Measurement of Cancellous Bone Density at Dental Implant Sites*

The CBCT images were loaded into Mimics (Materialise, Leuven, Belgium). Cylinders (3.5–4 mm in diameter and 8–12 mm in length) were virtually defined according to the dental implant site. The size of each cylinder corresponded to the subsequently inserted dental implant. Cancellous bone density was quantified as the mean GV of the cylinder (Figure 1). – – –

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**Figure 1.** Measurement of cancellous bone density, quantified as the mean grayscale values (GVs) of the cylinder, at a dental implant site.
