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http://dx.doi.org/10.5395/rde.2014.39.4.265

Effect of ultrasonic tip designs on intraradicular post removal  

Aguiar, Anny Carine Barros (Department of Endodontics, School of Dentistry, Federal University of Amazonas)
de Meireles, Daniely Amorim (Department of Endodontics, School of Dentistry, Federal University of Amazonas)
Marques, Andre Augusto Franco (Department of Endodontics, School of Dentistry, State University of Amazonas)
Sponchiado, Emilio Carlos Junior (Department of Endodontics, School of Dentistry, Federal University of Amazonas)
Garrido, Angela Delfina Bitencourt (Department of Endodontics, School of Dentistry, Federal University of Amazonas)
Garcia, Lucas Da Fonseca Roberti (Department of Dental Materials and Prosthodontics, Ribeirao Preto School of Dentistry, University of Sao Paulo)
Publication Information
Restorative Dentistry and Endodontics / v.39, no.4, 2014 , pp. 265-269 More about this Journal
Abstract
Objectives: To evaluate the effect of different ultrasonic tip designs on intraradicular post removal. Materials and Methods: The crowns of forty human canine teeth were removed, and after biomechanical preparation and filling, the roots were embedded in acrylic resin blocks. The post spaces were made, and root canal molding was performed with self-cured acrylic resin. After casting (Cu-Al), the posts were cemented with zinc phosphate cement. The specimens were randomly separated into 4 groups (n = 10), as follows: G1 - no ultrasonic vibration (control); G2 - ultrasonic vibration using an elongated cylindrical-shaped and active rounded tip; G3 - ultrasonic vibration with a flattened convex and linear active tip; G4 - ultrasonic vibration with active semicircular tapered tip. Ultrasonic vibration was applied for 15 seconds on each post surface and tensile test was performed in a Universal Testing Machine (Instron 4444 - 1 mm/min). Results: G4 presented the highest mean values, however, with no statistically significant difference in comparison to G3 (p > 0.05). G2 presented the lowest mean values with statistically significant difference to G3 and G4 (p < 0.05). Conclusions: Ultrasonic vibration with elongated cylindrical-shaped and active rounded tip was most effective in reducing force required for intraradicular post removal.
Keywords
Post removal; Tip design; Ultrasonic device;
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Times Cited By KSCI : 1  (Citation Analysis)
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