title: Evaluation of wear and subsequent dye penetration of endodontic temporary restorative materials.
abstract: This study evaluated the wear resistance and sealing property of endodontic temporary restoratives by means of functional stressing using a wear simulator. The pulp chamber of 28 extracted molars was opened and filled with cotton, and then the cavity was filled with a temporary material--Caviton, Temporary Pack, Neodyne-alpha, or TERM. Specimens were subjected to a wear test, and data for wear and dye penetration were analyzed by one-way ANOVA independently (p < 0.05). Wear values of Neodyne-alpha (0.09 +/- 0.05 mm) and TERM (0.24 +/- 0.06 mm) were significantly less than those of Caviton (1.79 +/- 0.15 mm) and Temporary Pack (1.02 +/- 0.40 mm). In terms of dye penetration, Neodyne-a leaked significantly less than the other materials at 0.40 +/- 0.32 mm. On the other hand, there were no significant differences between TERM (1.30 +/- 0.57 mm) and Temporary Pack (2.10 +/- 0.12 mm), and between Caviton (2.60 +/- 0.41 mm) and Temporary Pack.
authors.affiliation: Department of Endodontics, Tokyo Dental College, 1-2-2, Masago, Mihama-ku, Chiba-shi 261-8502, Japan. suehara@tdc.ac.jp
authors.forename: Masataka
authors.initials: M
authors.lastname: Suehara
authors.forename: Shiro
authors.initials: S
authors.lastname: Suzuki
authors.forename: Kanichi
authors.initials: K
authors.lastname: Nakagawa
mesh_terms: D000704:Analysis of Variance; D004396:Coloring Agents; D003763:Dental Leakage / Q000175:diagnosis / Q000209:etiology*; D019554:Dental Restoration Wear; D003794:Dental Restoration, Temporary; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D008963:Molar; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000009:adverse effects
chemical_list: D004396:Coloring Agents; D012387:Root Canal Filling Materials