title: [Significance of crown-down root canal preparation technique in endodontic therapy by using the hydroxylapatite sealer].
abstract: OBJECTIVE
  To evaluate the crown-down preparation technique, and the use of hydroxylapatite based material for the definitive root canal obturation.
  
  
  METHODS
  The investigation included 20 single-canal roots with chronic periapical inflammatory lesion. Biomechanical medicamentous canal preparation was done using the double-flared technique with balanced force, and the obturation was performed with hydroxylapatite sealer (unicone technique). Clinical and radiographic check-up performed 12 months after the treatment, used the following parameters: pain, swelling, percussion and palpation sensitivity, and the presence of fistula.
  
  
  RESULTS
  The obtained results showed a successful treatment in 18 cases, while in the 2 cases the treatment failed.
  
  
  CONCLUSIONS
  These findings suggested that the crown-down preparation technique efficiently cleaned and shaped the root canal, and that the hydroxylapatite-based material created the homogenous and hermetic root canal obturation, so this methodology could be recommended for the endodontic therapy.
authors.affiliation: Stomatoloski fakultet, Klinika za bolesti zuba, Beograd, Srbija i Crna Gora. drgrga@afrodita.rcub.bg.ac.yu
authors.forename: Nevenka
authors.initials: N
authors.lastname: Teodorović
authors.forename: Zeljko
authors.initials: Z
authors.lastname: Martinović
mesh_terms: D000293:Adolescent; D000328:Adult; D003442:Crowns; D017886:Durapatite; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000009:adverse effects / Q000379:methods*; D018915:Root Canal Preparation / Q000009:adverse effects / Q000379:methods*
chemical_list: D012387:Root Canal Filling Materials; D017886:Durapatite