Vertical preparations are not horizontal ones …yet most of dental technicians apply same concepts and techniques.
Vertical preparations have particular features regarding margin management, cervical thickness, seating during cementation and the hydraulic pressure generated by cementation.
With the introduction of monolithic zirconia or lithium disilicate the range of application of vertical preparation has increased hugely, but with these new materials all the previous unsolved problems, someway partially tolerated by metal ceramica, have exploded.
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