Panoramic radiographs are the first and most efficient method, used to examine and evaluate the heights of residual alveolar ridges of edentulous patients. After tooth extraction, wound healing of the extraction socket is associated with modeling processes leading to dimensional alterations of the residual ridge. Besides, alterations in the size and shape of the jawbones have been observed to occur throughout adult life and it continues further. Most of the bone loss occurs in the early stage of the atrophic process. The rate and the amount of bone loss may be influenced by various factors such as gender, hormones, metabolism, and parafunction. This study aimed to determine and compare differences in the vertical measurements of jawbones in both edentulous and dentate subjects. The study sample included the diagnostic panoramic radiographs of 53 randomly selected edentulous and dentate patients without systemic diseases affecting bone. -The radiographic selection criteria included the absence of obvious facial asymmetry, clearly visible anatomic structure, neither surgical nor fracture history. -The sample was divided into 3 groups: Groupe1: 29 edentulous patients Groupe2: 14 edentulous upper maxilla patients Groupe 3: 10 mandibular edentulous patients The height of the residual bone was measured at 18 predetermined sites. Results: The differences between elderly men and women in percentages of reductions in heights of the maxilla were not significant. The reduction of the anterior ridge height was greater in the maxilla than in the mandible for both sexes. Moreover, we found a significant correlation between age and bone height in both genders. Conclusion: The outcomes in the present study would contribute to better understanding of RRR in dentate and edentulous subjects.