Potential implant sites will be evaluated clinically and radiographically to determine the amount and location of available bone for the placement of dental implant(s). Implant sites are deemed appropriate when bone height (crest of ridge to vital anatomic structure such as the mandibular nerve canal) is equal to or greater than the length of the proposed implant plus 2+mm (margin of safety). In the case of locations without vital anatomic structures, the bone height may be equal to the length of the implant. The width of available bone should be at least 3mm greater in diameter than the proposed implant (i.e. at least 1.5mm of bone on all sides of the implant). Thus, a 4mm diameter implant requires a minimum of 7mm width of bone (anterior-posterior and mesial-distal). Finally, two implants may be placed next to one another when the available bone meets the above criteria for two implants (i.e. two 4mm implants require 14mm of bone with 3mm bone between the implants). As an example of the required minimum measurement for two 4mm implants: (1.5mm + 4mm + 1.5mm) + (1.5mm + 4mm + 1.5mm) = 14mm.