rkm rdt
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Ti bases are fine for tissue level placement but when you get a deep bone level implant ,they become too wide at the interface of the zirconia.Long deep sockets require a more gradual taper than the abrupt flare on the tibase. You have to bring the metal margin higher which the ti base cannot do.Why modify two stock abutments when you can purchase Non Engaging Ti bases that if cemented properly are perfectly passive in the interface? I don't get your argument here. They don't have to be parallel if the hex is non-engaging.