Effect of length of LOCATOR abutment and cement type on retention to intraradicular dentin in overdentures.

Aleisa, Khalil; Al-Dwairi, Ziad; Abou-Obaid, Alaa; Al-Muharib, Aseel; Al-Rejaye, Najla; Morgano, Steven M; Al-Haj Husain, Nadin; Özcan, Mutlu (2019). Effect of length of LOCATOR abutment and cement type on retention to intraradicular dentin in overdentures. The journal of prosthetic dentistry, 122(2), 152.e1-152.e6. Elsevier 10.1016/j.prosdent.2019.04.023

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STATEMENT OF PROBLEM Limited information is available on the effect of LOCATOR abutment length and luting cement type on retention to intraradicular dentin in overdentures. PURPOSE The purpose of this in vitro study was to evaluate the effect of the length of a commercially available LOCATOR abutment and cement type on retention in the root canal. MATERIAL AND METHODS Eighty LOCATOR abutments with a standard length of 6 mm were obtained. Half of them were shortened to 3 mm. Eighty recently extracted single-rooted teeth were divided into 2 groups. The post space was prepared to 6 mm in the first group and 3 mm in the second. After preparation, the LOCATOR abutments were luted with one of the following cements: dual-polymerized glass-reinforced resin cement (Parapost Paracore), dual-polymerized resin cement (Variolink II), self-adhesive resin cement (RelyX Unicem), and conventional cement (zinc phosphate). The tensile force required for the removal of the LOCATOR abutments from their corresponding roots was recorded. Data were statistically analyzed with 2-way ANOVA and the Tukey multiple comparison test. RESULTS Both the cement type (P<.001) and the length of the LOCATOR abutment (P<.001) significantly affected the mean tensile forces. Dual-polymerized glass-reinforced resin cement (Parapost Paracore) presented significantly higher mean tensile forces for the LOCATOR abutment retention among all cements (P<.05). CONCLUSIONS Regardless of the length, LOCATOR abutments luted with Parapost Paracore resin cement presented higher mean resistance to tensile forces compared with those luted with the other cements. LOCATOR abutments of 6 mm in length were more resistant to tensile forces than those of 3 mm in length in combination with all cements.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology

UniBE Contributor:

Al-Haj Husain, Nadin


600 Technology > 610 Medicine & health








Vanda Kummer

Date Deposited:

31 Oct 2019 12:22

Last Modified:

31 Oct 2019 12:22

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