title: Post space cleaning using a new nickel titanium endodontic drill combined with different cleaning regimens.
abstract: This study compared the effect of two drills and five cleaning regimens on post space debridement. One hundred extracted premolars were instrumented and obturated with warm vertical compaction of gutta percha. The teeth were divided into two groups according to the drill used to remove gutta percha/sealer and for post space preparation: a Largo drill (Largo; Dentsply, St Quentin en Yvelines, France) or a MTwo-PF drill (Sweden&Martina, Due Carrare, Padova, Italy). The following cleaning regimens were used: EDTA, ultrasonics, ultrasonics + EDTA, phosphoric acid, and distilled water. Scanning electron microscopic images of the post spaces were taken, and the presence of debris and of open dentin tubules were evaluated. The ultrasonics + EDTA, phosphoric acid, and EDTA groups were comparable in open tubules scores for both drills and in debris scores after the use of MTwo-PF (p > 0.05). The ultrasonics and control groups performed significantly worse (p < 0.05). The MTwo-PF drill resulted as effective as the Largo drill in obtaining a good post space cleaning, especially when followed by ultrasonics + EDTA irrigant regimen.
authors.affiliation: Department of Fixed Prosthodontics and Dental Materials, University of Siena, Siena, Italy. conivan@freemail.it
authors.forename: Ivanovic
authors.initials: I
authors.lastname: Coniglio
authors.forename: Elisa
authors.initials: E
authors.lastname: Magni
authors.forename: Cecilia
authors.initials: C
authors.lastname: Goracci
authors.forename: Ivana
authors.initials: I
authors.lastname: Radovic
authors.forename: Carlos Augusto
authors.initials: CA
authors.lastname: Carvalho
authors.forename: Simone
authors.initials: S
authors.lastname: Grandini
authors.forename: Marco
authors.initials: M
authors.lastname: Ferrari
mesh_terms: D003131:Combined Modality Therapy / Q000379:methods; D004492:Edetic Acid / Q000627:therapeutic use*; D006801:Humans; D009532:Nickel / Q000737:chemistry; D010756:Phosphoric Acids / Q000627:therapeutic use; D011176:Post and Core Technique; D012388:Root Canal Irrigants / Q000627:therapeutic use*; D012390:Root Canal Therapy / Q000295:instrumentation*; D018709:Statistics, Nonparametric; D014025:Titanium / Q000737:chemistry; D014464:Ultrasonic Therapy / Q000379:methods; D014867:Water / Q000008:administration & dosage
chemical_list: D010756:Phosphoric Acids; D012388:Root Canal Irrigants; D014867:Water; C040654:titanium nickelide; D009532:Nickel; D004492:Edetic Acid; D014025:Titanium; C030242:phosphoric acid