Objective: This study was performed to elucidate the influence of facial bone thickness on crestal bone resorption at the proximal surfaces of dental implants. Materials and Methods: Twenty Midi one-piece implants were placed in healed bony sites of twenty patients in the area of maxillary anterior and premolar region. Patients were divided into two groups according to the thickness of buccal bone either 2 mm group (1) or 2 mm group (2). The implants were placed using standard surgical procedure. Buccal bone thickness was measured at the osteotomy site using a caliper. All implants were immediately loaded with temporary acrylic crowns for 4 months and then replaced with porcelain fused to metal final restorations. Radiographic evaluation and measurement of initial stability using Periotest M were done immediately postoperatively and after 4 months follow up period. Results: All the implants were successfully osseointegrated and showed significant decrease in Periotest M values with no statistically significant difference between the two groups. On the other hand, in group (1), the mean bone resorption were 3.07 (0.35) mm mesially and 2.88 ( 0.41) mm distally, while in group (2) were 0.68 ( 0.59) mm mesially and 0.95 ( 0.56) mm distally. Conclusion: The thickness of buccal bone at the osteotomy site had an inverse correlation with the vertical bone resorption, mesially and distally, around implants. Thus, buccal bone thickness should be at least 2 mm to achieve the least amount of vertical bone resorption.