الفهرس 
Title : Post and Core Repair of Fractured Implant Screw (In vitro Study)
ContantsOnly 14 pages are availabe for public view
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Abstract
The idea of this study is to propose a technique to salvage osseointegrated implant with damaged internal threads using Ni-Cr or zirconia post and core. Post and core specimens were fabricated from Zirconia and NiCr to precisely fit the post space in the prepared implant fixtures. The specimens were randomly divided into 7 groups (n=10) depending on the post and core material and the duration of simulated intra-oral function.group (1): Zirconia post and core control group; immediate placement, no fatigue test is carried out. group (2): NiCr post and core control group; immediate placement, no fatigue test is carried out. group (3): Zirconia post and core group were subjected to 5 months fatigue test. group (4): NiCr post and core group were subjected to 5 months fatigue test. group (6): NiCr post and core group were subjected to 2 years fatigue test. group (7): NiCr post and core group were subjected to 3 years fatigue test