electric welding.

ABSTRACT The aim of this study: is to assess bone height changes under screw retained maxillary implant supported complete denture using two types of framework casted metal versus electric welded at one year follow up period. This split mouth study on screw retained implant supported maxillary complete denture supported by 6 implants, where the study were conducted in two groups each participant maxillary ridge was blindly allocated to right or left side, either group I (metal casted framework group (the gold standard treatment choice or group II ( intraoral electric welded framework) then both groups were received a picked up screw retained hybrid prosthesis sectioned in the mid line , palate less and reduced in the 2nd premolar area. Bone height changes assessment were evaluated by performing a standardized digital periapical radiographs using parallel technique(long cone technique) around each implant in both mesial and distal aspects. Through the 1 year follow up period there was a significant difference in increasing bone height changes though out the follow up period in both groups (casted group and welded group), whereas the electric welded framework shows the least amount of bone height changes. 1- there was bone height changes around implants through the whole follow up period in both groups, where bone height changes yields lower values in the electric welded group than that in the conventional casted group. Keywords: Implants, hyprid prosthesis, cast metal framework, electric welding.