title: Effectiveness of ProFile .04 taper rotary instruments in endodontic retreatment.
abstract: This study investigated the retreatment effectiveness of .04 Taper nickel-titanium rotary ProFiles. Thirty extracted single-rooted anterior teeth were instrumented and obturated with gutta-percha/Roth's Sealer using lateral condensation. They were distributed into three groups of 10 each. Retreatment for group A was done using Profile alone, group B using Profile and chloroform, and group C using hand files with chloroform. The teeth were then split longitudinally into halves. The remaining gutta-percha/sealer on the root canal wall in the cervical, middle, apical thirds, and the whole canals were visually scored with the aid of light microscopes. The results showed that the mean scores in groups A and B were generally lower (better) than group C. Mean scores of the apical thirds tended to be higher (worse) than the middle and the cervical thirds, except in group A. ProFile with or without chloroform seemed to be a viable alternative retreatment method.
authors.affiliation: Department of Restorative Dentistry, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 119074, Republic of Singapore.
authors.forename: V
authors.initials: V
authors.lastname: Sae-Lim
authors.forename: I
authors.initials: I
authors.lastname: Rajamanickam
authors.forename: B K
authors.initials: BK
authors.lastname: Lim
authors.forename: H L
authors.initials: HL
authors.lastname: Lee
mesh_terms: D000704:Analysis of Variance; D002725:Chloroform / Q000737:chemistry; D003481:Cuspid; D003722:Dental Alloys; D003786:Dental Pulp Cavity / Q000473:pathology; D004867:Equipment Design; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D007180:Incisor; D009532:Nickel; D019233:Retreatment; D012387:Root Canal Filling Materials / Q000737:chemistry; D012388:Root Canal Irrigants / Q000737:chemistry; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000295:instrumentation*; D012399:Rotation; D018709:Statistics, Nonparametric; D013499:Surface Properties; D014025:Titanium; D016896:Treatment Outcome; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
chemical_list: D003722:Dental Alloys; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D015035:Zinc Oxide-Eugenol Cement; C040654:titanium nickelide; C095719:Roth's 811 sealer; D009532:Nickel; D002725:Chloroform; D006171:Gutta-Percha; D014025:Titanium