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Zimmer Dental’s patentedfriction-fit abutment connection.Drive a piton deep into rock, and it locksfirm, giving the climber a solid securebase. Friction-fit abutments form a coldweld connection with the implant,essentially eliminating micromovement,tipping and the effects of vibration.Screw loosening virtually disappears,along with the hours spent on freeadjustments and remakes.Without friction-fit, other internalconnections face limitations as theeffects of micromovement may not becompletely eliminated. Only whenyou combine the two technologies,friction-fit and internal hex, do you reachthe most advanced evolution in implantconnections – Zimmer internal hex withfriction-fit.Friction-fit technology far surpassesthat of standard external and internalhex connections. External hexagons fallshort because they were originallycreated only to drive the implant into thesurgical site; their outdated design wasnever meant to serve as an anti-rotationaldevice.Male abutment hex witha one-degree taperLead-in bevelInternal hex 1.5mm deepFigure 1 Abutments for Tapered Screw-Vent ® and other Zimmerinternal hex implants have a male hex that tapers one degreefrom the base of the abutment body to the bottom of the hex.As the abutment is seated into the implant under appliedtorque, the abutment hex frictionally engages the walls of theimplant's internal hex. The result is a friction-fit that virtuallyeliminates rotation between components.