title: Coronal leakage along apical root fillings after immediate and delayed post space preparation.
abstract: The seal provided by a full-length root canal filling may be compromised by post space preparation. Eighty human mandibular premolars each with a single canal were obturated with laterally condensed gutta-percha cones and a sealer. Immediate post space preparation was carried out on half the number of teeth and delayed post space preparation on the remaining 40 teeth. Leakage along the apical root fillings was determined using a fluid transport device under a head space pressure of 30 kPa (0.3 atm). More leakage was found after delayed preparation than after immediate preparation (P = 0.0059).
authors.affiliation: Department of Cariology and Endodontology, College of Stomatology, Hubei Medical University, Wuhan, China.
authors.forename: B
authors.initials: B
authors.lastname: Fan
authors.forename: M K
authors.initials: MK
authors.lastname: Wu
authors.forename: P R
authors.initials: PR
authors.lastname: Wesselink
mesh_terms: D001641:Bicuspid; D003763:Dental Leakage / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D011176:Post and Core Technique / Q000009:adverse effects; D018709:Statistics, Nonparametric; D013997:Time Factors; D019231:Tooth Preparation, Prosthodontic / Q000009:adverse effects* / Q000379:methods