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Questions
” DOUBLE STEP REVERSE ” ( DSR ): A NEW PROTOCOL IN POLYVINYLSILOXANES ( PVS ) IMPRESSION- TAKING PROCESS - TWO CASE REPORTS
term accuracy and dimensional stability when the finish line is within the gingival sulcular area . J Prosthodont . 2014 ; 23 ( 2 ): 124- 133 . doi : 10.1111 / jopr . 12062 . 7 . McCabe JF , Arikawa H . Rheological properties of elastomeric impression materials before and during setting . J Dent Res . 1998 ; 77 ( 11 ): 1874-1880 . 8 . Perakis N , Belser UC , Magne P . Final impressions : a review of material properties and description of a current technique . Int J Periodontics Restorative Dent . 2004 ; 24 ( 2 ): 109-117 . 9 . *** Vinyl polysiloxane impression materials : a status report . Council on Dental Materials , Instruments , and Equipment . J Am Dent Assoc . 1990 ; 120 ( 5 ): 595-596 , 598 , 600 . 10 . Rupp F , Saker O , Axmann D , Geis-Gerstorfer J , Engel E . Application times for the single-step / double-mix technique for impression materials in clinical practice . Int J Prosthodont . 2011 ; 24 ( 6 ): 562-565 .
11 . Caputi S , Varvara G . Dimensional accuracy of resultant casts made by a monophase , one-step and two-step , and a novel twostep putty / light-body impression technique : an in vitro study . J Prosthet Dent . 2008 ; 99 ( 4 ): 274-281 . doi : 10.1016 / S0022- 3913 ( 08 ) 60061-X . 12 . Vitti RP , da Silva MA , Consani RL , Sinhoreti MA . Dimensional accuracy of stone casts made from silicone-based impression materials and three impression techniques . Braz Dent J . 2013 ; 24 ( 5 ): 498-502 . doi : 10.1590 / 0103-6440201302334 . 13 . Millar BJ , Dunne SM , Robinson PB . In vitro study of the number of surface defects in monophase and two-phase addition silicone impressions . J Prosthet Dent . 1998 ; 80 ( 1 ): 32-35 . 14 . Vaccaro F , Rengo S . Alternative computerizzate CAD / CAM alle tradizionali procedure protesiche per la realizzazione di protesi parziali fisse in zirconia : metodica LAVA System . Graduation thesis in PhD in Oral Science . 2015-2016 , XXX
Enrico MANCA DDS , Professor in University Master Degree in Oral Implantology
Department of Surgical Pathology , Medicine , Molecular and Critical Area , University of Pisa , Pisa , Italy
Clinical Dentist in Cagliari ( Italy )

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He is a clinical dentist who graduated in 1994 from the Università di Cagliari ( Italy ) with a great experience and passion for aesthetic prosthodontics . He is currently a professor at the University Master Degree in Oral Implantology in Universita ’ di Pisa , ( Director Prof . Ugo Covani ). He is also a visiting professor at the University of Valencia . ( Director Prof . Miguel Peñarrocha ) He is an active member of ESCD and Amici di Brugg , and he is often a guest speaker at various conferences and events in Italy and abroad .

Questions

What is meant by “ DSR ”?
qa . A new kind of diode-laser ; qb . A new impression material ; qc . A technique used to retract tissues ; qd . An impression technique .
What does the acronym DSR mean ?
qa . Dynamic Standard Registration ; qb . Digital Standard Records ; qc . Double Step Reverse ; qd . Direct Simple Records .
According to the DSR protocol , which material is first delivered on the abutment ?
qa . Extra-Light Viscosity material ; qb . Ultimate Wash material ; qc . Ultimate Tray material ; qd . Both of them together .
When it is advisable to deliver the tray material ?
qa . Once the Wash material is completely set ; qb . Along with the Light material ; qc . Before the Light material ; qd . It is not required by this protocol .

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