This study was to evaluate the effect of two different types of housing securing materials on bone hight changes using Radiographic evaluation by using cone beam CT. of Locator retained mandibular overdenture. All patient received Locator attachments. The patients were divided into two groups according to resilient or hard the securing material.
Radiographic evaluation by using cone beam CT was done for all patients after 12 months. After radiographic evaluation the securing materials were change for each group (The first group was used self-cure acrylic resin for securing the housing of locator. While, the second group used soft liner). The results of the study showed minimal marginal bone loss in soft liner group, at the end of 12 months follow-up period indicating a significant difference between the two groups.