splinting of two implant will affect passivity of final prosthesis also effect of amount of marginal bone loss , new impression material of Vinyl polyether silicone can solve this problem due to its stiffness enough to

support .

The aim of this study was to evaluate the amount of bone loss on CAD/CAM

(milled) two implant supported Telescopic mandibular overdenture attachments by

splinting and Non splinting of two different impression materials (Vinyl Polyether Silicone

and additional silicone)

4 groups of this study prepared on two different impression

material , each impression material divided into two group splinting and non-splinting :

Group (I): Divided into two subgroups Group (I.A): 5 patient receive two implants

with on CAD/CAM (milled) two implant supported Telescopic mandibular overdenture

attachments opposing maxillary complete denture with final impression technique

made by Vinyl Polyether Silioxaine (VPES) with splinting technique.

The bone loss evaluated from 0 to 12 months after loading