Sixteen identical resin models (Bonemodels SLU, Castellon, Spain)eight maxillary and eight mandibular models-were manufactured. Models were made of resin similar to bone density type 3 (maxilla) and type 2 (mandible). To differentiate cortical bone, spongy bone, and ana-tomic structures such as nerves, blood vessels, and maxillary sinuses, the resin material had different radiopacities. The gingiva was made of silicone (Fig. 1). Eight Ankylos (Dentsply Sirona, Charlotte, NC, USA) implants (3.5 × 11.5 mm) were placed in the anterior region (position 21), and 24 Astra Evolution (Dentsply Sirona) implants (4.2 × 13 mm) were placed in the posterior region, positions (15, 36, and 46 ) (n = 32). This allowed for evaluation of different implant types in different implant positions for the same Cerec guide 3 protocol (Dentsply Sirona).
Sample size was calculated for an expected power of 80%, an α of 0.05, and a medium effect size, according to an initial sample of three implants of each type (Table 1).
Sample size was calculated for an expected power of 80%, an α of 0.05, and a medium effect size, according to an initial sample of three implants of each type (Table 1).