Authors : Ehab A. ElsaihAhmed HabibAhmed HabibMohammed M FouadMohammed M FouadMohamed S TawfikMohamed S Tawfik
Volume : 56
Issue : 3
Year : 2010
Page No : 1409-1418
purpose: This study was aimed to investigate and compare the effect of implant supported versus retained mandibular distal extension removable partial overdenture (RPOD) on the abutment and implant marginal bone height changes. materials and methods: 20 healthy male patients were selected with mandibular bilateral distal extension ridges against edentulous maxilla .One osseointegerated self taping implants was installed distally in the area of the second mandibular molar of each side. Patients were divided into two equal groups; Group I: received maxillary complete denture against implant supported RPOD, and Group II : received maxillary complete denture against implant retained RPOD. Digital panoramic radiographs were recorded for each patient immediately, 6 and 12 months after denture insertion to measure the abutment and implant marginal bone height changes. results: The mean tooth abutments marginal bone loss was statistically significant in both groups after 6 and 12 months of the study. However, this marginal bone loss was statistically significant between both groups after 12 months of the study. The mean implant marginal bone loss was statistically significant within and between both groups along the periods of the study. Conclusion: Regardless the implant RPOD designs concept (supported or retained), abutment tooth and implant marginal bone were significantly reduced. However, this study recommended periodic monitoring of ridge base relation to preserve the supporting structures.