The aim of this study is to evaluate the improvement in masticatory efficiency and retention of tooth-supported overdenture using customized copings over abutment teeth with a silicone-based matrix attachment system present an alternative to prefabricated precision attachments. Saving mutilated teeth and using them for overdenture has been a good alternative to the conventional dentur... https://www.roneverhart.com/HGST-Ultrastar-7K6000-HUS726040ALS214-4TB-7-2K-RPM-SAS-12Gb-s-512n-128MB-3-5-SE-Hard-Drive/