Background: Advanced developments in the field of dentistry have observed the utilization of implants as a manageable treatment approach for edentulous patients. In addition, the rapid emergence of cone-beam computed tomography (CBCT) is aforethought significant, particularly for optimum implant installation. The objective of this investigation is to radiographically evaluate the bone density and alveolar bone height in the vicinity of implants and premolars in tooth-implant sustained fixed partial dentures (FPDs) with rigid connector vs implant–implant supported FPDs with rigid connector using CBCT. Materials and methods: The height and width of the implant were taken into consideration. A sample of eight patients was used having both males and females, aged between 30 years and 45 years with good oral hygiene and divided into two groups. Patients within group I were given a tooth-implant-supported FPD associated to the dental implant at the site of mandibular second molar. On the contrary, patients of group II were given an implant–implant FPD associated to a distal implant at the site of second molar. For evaluating the bone quality of each patient, preoperative panoramic radiographs using the orthopantomograph OT 100 and CBCT images using Scanora 3D were constructed. Results: The findings of the current study indicated that there was no statistically substantial discrepancy among values of bone density in groups. Conclusion: It is concluded that progressive loading tends to increase the bone density by time.