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J Dent Res Dent Clin Dent Prospects. 2012;6(3): 98-102.
doi: 10.5681/joddd.2012.021
PMID: 22991646
PMCID: PMC3442431
  Abstract View: 814
  PDF Download: 574

Original Article

Effect of Abutment Height on Retention of Single Cementretained, Wide- and Narrow-platform Implant-supported Restorations

Fariba Saleh Saber 1, Nader Abolfazli 2*, Sara Nuroloyuni 3, Sohleh Khodabakhsh 4, Mehran Bahrami 5, Reza Nahidi 5, Somaieh Zeigham 5

1 Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
2 Associate Professor, Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
3 Post-graduate Student, Department of Pediatric Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
4 Dentist, Private Practice, Urmieh, Iran
5 Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
*Corresponding Author: *Corresponding Author; , Email: spintanad@gmail.com

Abstract

Background and aims. In contrast to prepared natural dentin abutments, little is known concerning factors influencing the retention of fixed prostheses cemented to implant abutments. The aim of this study was to investigate the effect of implant abutment height on the retention of single castings cemented to wide and narrow platform implant abutments.

Materials and methods. Thirty-six parallel-sided abutments (Biohorizon Straight Abutment) of narrow platform (NP) and wide platform (WP) sizes with their analogs were used. In each group of platform size, abutments were prepared with axial wall heights of 5, 4, 3, 2 mm (n=9). On the whole 72 castings were constructed, which incorporated an attachment to allow removal. Castings were cemented to abutments with TempBond®. A uniaxial tensile force was applied to the crown using an Instron machine until cement failure occurred. Analysis of variance of the models were fit to determine the effect of height of abutment of the restorations on the mean tensile strength (α=0.05).

Results. The mean peak removal force for corresponding abutments was significantly different (P < 0.05): (1) with platform sizes: WP > NP; (2) with alteration of axial wall height for NP: 5 mm > 4 mm > 3 mm = 2 mm and for WP: 5 mm > 4 mm = 3 mm = 2 mm.

Conclusion. The retention of NP cement-retained restorations is influenced by the wall height but not in same manner as WP. Restorations of narrow-platform size with longer abutment exhibited higher tensile resistance to dislodgement.

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Submitted: 10 Nov 2011
Accepted: 27 May 2012
ePublished: 26 Jun 2017
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