CAD/CAM - international magazine of digital dentistry

I industry report _ full arch rehabilitation _Introduction The concept of having only four SHORT® im- plantsforthesupportofafixedfullarchnon-metal- lic prosthesis (Trinia™), a CAD/CAM fiber reinforced resin,wasfirstexecutedin2010.Theclinicallybased results performed in three different implant den- tistry centers are showing clinical success because of Trinia’s inherent mechanical and clinical proper- ties.Anotherfactorwerethe360degreesofuniver- sal abutment positioning provided by the Implants Locking Taper connection (Bicon®), which gives the opportunity to use the Trinia™ prosthesis to orient and seat the abutments in the well of the implants. The Trinia framework may be covered with either customizedpoly-ceramicindirectcompositemate- rial or by conventional denture teeth and resin. In the following case presentation, we want to show how short implants have been successfully usedtorestoreseverelyatrophicmandibleswithout the use of difficult bone augmentation procedures and complicated prosthetic suprastructures in the past decade. _Material and methods Bicon Dental implants (Bicon LLC, Boston, MA, USA) were used for the reconstruction of the case, combined with a CAD/CAM fiber reinforced resin framework (Trinia™) and conventional denture teeth and resin prosthesis. Bicon implants can be characterized by their special macro-structure, in- cluding a root-shaped design with wide fins called plateaus, by a sloping shoulder and by a well which holds the abutment post by means of a Locking Taper connection.1 Theplateausareofparticularimportanceforthe biomechanical performance, allowing SHORT® im- plants with a wide diameter to be used in any posi- tion in the oral cavity. Their insertion into the os- teotomy,whichhasbeenpreparedusingatraumatic drills rotating at 50 rpm, is executed by using me- chanical pressure. The countless micro-retentions created on the surface of the fin edges with the walls of the osteotomy ensure primary stability of the implant in the implant site. Furthermore, the wide spaces between the plateaus avoid vertical compression on the bone walls and rapidly collect the clotted blood, allowing rapid bone formation without the classic macrophagic and osteoclastic Fixed full arch metal-free prosthesis on four SHORT® implants Authors_Prof. Mauro Marincola, Italy, Dr Vincent J. Morgan, USA, Angelo Perpetuini & Stefano Lapucci, Italy 34 I CAD/CAM 1_2013 Fig. 3 Fig. 4Fig. 2 Fig. 1