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Zimmer internal hex advantage.The only hex abutment that truly locks into place.Compared to other internalhex connections.• Zimmer Dental abutments for internalhex implants have a tapered male hexthat frictionally engages the implant,resulting in zero degrees of rotationalmovement between the implant andabutment when tightened to therecommended torque of 30Ncm. 1Compared to traditional externalhex connections.• Zimmer Dental’s internal hexwith friction-fit abutments virtuallyeliminates rotation when componentsare fully seated. 1• In contrast, external hexes typicallyhave a rotational misfit of 3 to 10degrees between the implant andVirtualcold weldAbutmentImplant• Without the friction-fit hex combination,implants with internal engaginggeometries are just like an externalhex turned upside down, allowing formovement between components.abutment. 2• Screw loosening of external heximplant components is documentedup to 38% of all single-tooth, partiallyand fully edentulous cases. 3Figure A SEM at 50Xmagnification shows intimatecontact of the internal heximplant at both the beveledimplant/abutment interfaceand the hexagonalengagement area.• To overcome rotational problemswith their connections, competitorshave attempted various designmodifications, including strengtheningscrews, increasing clamping forces,and varying hex dimensions. OnlyZimmer Dental has an internal hexconnection that virtually eliminatesrotation by design.In the U.S., call your Zimmer DentalSales Consultant or Customer Serviceat 800 854 7019 to find out howZimmer friction-fit products canimprove your practice. Outside theU.S., please refer to the contactinformation located on the back ofthis brochure.Virtual coldweld at 150XmagnificationAbutmentImplantProudly offering one of the most comprehensive dental implant product lines available,Zimmer Dental is a market leader in the development of world-class implantologyproducts, practice-building strategies and educational programs focused on empoweringclinicians and improving patients’ lives.Figure B SEM at 150Xmagnification displays themechanical interlock in thehexagonal engagement areabetween the flats of theimplant and abutment.Intimate friction-fitRotation between the implant andabutment results in screw-jointloosening. Zimmer Dental’s friction-fitabutments virtually eliminate rotationwhen fully seated, minimizing costlyrepairs and repeat visits. ScanningElectron Micrographs reveal theintimate fit that results in a virtual“cold weld” of Zimmer Dentalcomponents (Figures A, B).
The evolution and evaluation of twointerference-fit implant interfaces.Abstract and ConclusionsBy Paul P. BinonPostgraduate Dentistry1996:3(1)Component misfit has been implicatedas one of several important factors inscrew-joint failure and screw loosening indental implants. Recent evidence indicatesthat rotational misfit may be moreimportant in screw-joint stability thanoriginally anticipated. Efforts have beenmade to reduce and/or eliminaterotational misfit with different nonrotatingimplant interfaces. The effectiveness ofan interference-fit implant interface isreported in this article. The implantswere evaluated for rotational movement,the intimacy and nature of hexagonalcontact, the adequacy of the implant/abutment interface seal, and machiningconsistency of the hexagonals andimplant. Currently available componentsare contrasted with components thatwere available initially in the evolution ofthe friction-fit/interference-fit interfaces.Significant improvements and refinementshave been incorporated into the currentgeneration of components.ConclusionsThe friction-fit hexagonal implant wasevaluated and contrasted for machiningconsistency, interface fit, and rotationalstability. From the data presented, thefollowing conclusions can be drawn:1. Rotational freedom (misfit) forthe [Screw-Vent] implant/abutmentsystems...was 0 degrees...when fullytightened to 30 Ncm.2. The SEM and microphotograph crosssectionsdocument intimate hexagonalcontact and interference fit that results inabutment rotational stability.3. Refinements in machining tolerancesand the availability of a reliable methodof torque application have resulted inpredictable and consistent implant/abutment interface seals.References1. Binon PP: The evolution and evaluation of twointerference-fit implant interfaces. Postgraduate Dent1996;3:3-13.2. Binon PP: Evaluation of machining accuracy andconsistency of selected implants, standard abutmentsand laboratory analogs. Int J Prosthodont1995;8:162-178.3. Goodacre CJ, Kan JYK, Rungcharassaeng K: Clinicalcomplications of osseointegrated implants. JProsthetic Dent 1999;8:537-552.Optical cross-sectionmicrographs of the Screw-Vent implant/abutmentcombination were evaluated.This image illustrates thetypical intimate contact andfriction-fit between theinternal straight hexagon ofthe implant and the external1-degree tapered hexagonof the abutment.The beveled seating areaalso demonstrates fullcontact and an intimate seal.
Page 1 and 2: Rock-solid fit.A connection you can
Page 3: Zimmer internal hex with friction-f

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