title: 'Simultaneous technique' and a hybrid Microseal/PacMac obturation.
abstract: In these endodontic case reports we present a root canal preparation protocol using the Mtwo Ni-Ti rotary files according to the 'simultaneous technique' which is a'crown-down' approach, where every instrument in the sequence is used to the full working length. A hybrid Microseal/PacMac obturation (consisting of three stages: master cone compaction, backfill with pre-plasticized guttapercha and vertical compaction) is proposed in order to: maintain the obturation length control associated with the Microseal system; use preheated gutta-percha to backfill the canal rapidly with the PacMac condensor; and to reduce potential voids in the obturation material with the final vertical compaction.
  
  
  CONCLUSIONS
  The'simultaneous technique'followed by apical preparation using Mtwo apical files allows obturation using the proposed hybrid Microseal/Pacmac method, aiming to overcome some of the shortcomings of the Microseal and Pacmac obturation methods, such as length control difficulty and sealer pooling.
authors: University of Chieti-Pescara, Chieti, Italy.
authors: Vito Antonio
authors: VA
authors: Malagnino
authors: Giampiero
authors: G
authors: Rossi-Fedele
authors: Paola
authors: P
authors: Passariello
authors: Luigi
authors: L
authors: Canullo
mesh_terms: D003762:Dental Instruments; D006801:Humans; D012389:Root Canal Obturation / Q000295:instrumentation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation* / Q000379:methods*