RESUMEN
Several studies have been carried out on the histologic and mophologic changes in the structure supporting complete dentures. Nothing was reported in the literature about the effects of Diabetes Mellitus on the morphology of the structures supporting complete dentures. The aim of this work was to study the topographic changes in the denture bearing area in non-diabetic and diabetic patients. The results showed that complete dentures caused reduction in the heights of the ridges in diabetic and non-diabetic patients. However, than reduction in heights of the ridges in diabetic group was greater thar. that in the non-diabetic group. More reduction in the heights of the ridges took place in the premolar and first molar rather than in the second molar regions