THE RESEARCH ON INTENSE DEFORMED CONDITION OF STUMP PIN INSERTS
There is no common opinion concerning to the criteria defining the indications to this or that method of treatment where the choice depends on a number of factors. The main concern is material properties used for manufacturing intra-root pins. Metal alloys have been proved well throughout many years as a material of choice for manufacturing intra-root pins. The attempt of search of materials possessing high esthetics, biological inertness which created the necessity of studying the durability of aluminum oxide characteristics for the purpose of consideration possibilities of its use for manufacturing stump pin inserts. Studying durability characteristics of the stump pin inserts made from nickel-chromium alloy and aluminum oxide in addition with dioxide of zirconium (Vita In-Ceram Zirconia) has been done. While the experiment it has appeared that the force leading to the fracture of stump pin inserts from aluminum oxide and dioxide of zirconium is much lesser than the corresponding indicators of the samples made from nickel chromium alloy.