Effect of airborne-particle abrasion on retentive strength in overtapered fixed prosthodontic restorations.

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  • Author(s): Gurbuz A;Gurbuz A; Inan O; Kaplan R; Ozturk AN
  • Source:
    Quintessence international (Berlin, Germany : 1985) [Quintessence Int] 2008 Mar; Vol. 39 (3), pp. e134-8.
  • Publication Type:
    Journal Article
  • Language:
    English
  • Additional Information
    • Source:
      Publisher: Quintessenz Verlags-GmbH Country of Publication: Germany NLM ID: 0342677 Publication Model: Print Cited Medium: Internet ISSN: 1936-7163 (Electronic) Linking ISSN: 00336572 NLM ISO Abbreviation: Quintessence Int
    • Publication Information:
      Original Publication: [Berlin : Quintessenz Verlags-GmbH, 1985-
    • Subject Terms:
      Air Abrasion, Dental* ; Crowns* ; Dental Prosthesis Retention*; Cementation/*methods ; Tooth Preparation, Prosthodontic/*methods; Chromium Alloys ; Dental Stress Analysis ; Glass Ionomer Cements ; Humans ; Molar ; Polycarboxylate Cement ; Tensile Strength ; Zinc Phosphate Cement
    • Abstract:
      Objective: To evaluate retentive strength and film thickness of complete metal crowns cemented to overtapered teeth with 3 different cements after the application of airborne-particle abrasion.
      Method and Materials: Sixty extracted maxillary molar teeth were embedded in autopolymerizing resin. Crowns were prepared with 30-degree overtapered axial walls and a 1-mm shoulder margin using a water-cooled cylindrical airborne-particle abrasion device. Then, 60 complete crowns were made from a nickel-chromium alloy. Teeth and crowns were assigned to 2 groups, 30 to the control group and 30 to the experimental group to undergo airborne-particle abrasion. In the first part of study, 30 teeth from the experimental group were submitted to the silicon-replica technique and their buccolingual cross sections were measured so that cement film thickness could be measured before airborne-particle abrasion. Three measurements using a light microscope were made in 7 regions of each tooth. In the second part of study, complete metal crowns with and without airborne-particle abrasion were distributed into 3 groups with 10 teeth each to be cemented with zinc phosphate, polycarboxylate, or resin-modified glass ionomer. All specimens were subjected to a tensile bond test in an universal testing machine at a crosshead speed of 0.1 mm/min until failure. The results were then evaluated with Student t test at a 5% level of significance.
      Results: The film thickness showed no statistically significant differences among groups (P > .05). There was a significant difference between the control and experimental groups, with an increase in all 3 cements after airborne-particle abrasion (P < .05). The highest retentive strength in the control group was found with resin-modified glass ionomer (141.4 +/- 56.7 N), but there was no significant difference between the resin-modified glass ionomer (141.4 +/- 56.7 N) and zinc phosphate (121.4 +/- 24.2 N) (P > .05). Retentive strength of polycarboxylate was the lowest (78.03 +/- 16 N) (P < .05). For the experimental group, the difference among the zinc phosphate (220.5 +/- 83.8 N), polycarboxylate (185.4 +/- 60.8 N), and resin-modified glass ionomer (228.9 +/- 62.4 N) was not statistically significant (P > .05).
      Conclusion: Airborne-particle abrasion had a positive effect on the retention of complete metal crowns when the crowns were cemented with zinc phosphate cement, polycarboxylate cement, or resin-modified glass-ionomer cement.
    • Accession Number:
      0 (Chromium Alloys)
      0 (Glass Ionomer Cements)
      0 (Polycarboxylate Cement)
      7779-90-0 (Zinc Phosphate Cement)
    • Publication Date:
      Date Created: 20080712 Date Completed: 20081006 Latest Revision: 20220409
    • Publication Date:
      20221213
    • Accession Number:
      18618029