Evaluation of Biomechanical Effects of Prosthetic Components with Different Materials on the Abutment Screw

Crown fractures, framework fractures, and abutment screw loosening or screw fracture are examples of mechanical implant failures. Abutment screw loosening is a serious problem that can result in abutment screw fractures. This clinical report describes the production method of a custom-made abutment screwdriver piece for a patient with abutment screw loosening.

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Comparative Evaluation of Fracture Resistance and Mode of Failure of Zirconia and Titanium Abutments with Different Diameters

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1730 ◽

2015 ◽

Vol 16 (8) ◽

pp. 613-618 ◽

Cited By ~ 4

Author(s):

Safoura Ghodsi ◽

Reza Shabanpour ◽

Niloufar Mousavi ◽

Marzieh Alikhasi

Keyword(s):

Fracture Resistance ◽

Comparative Evaluation ◽

Failure Modes ◽

Statistical Significance ◽

Testing Machine ◽

Modes Of Failure ◽

Body Fracture ◽

Mode Of Failure ◽

Different Diameters ◽

Abutment Screw

ABSTRACT Aim The purpose of the current study was to compare the fracture resistance and mode of failure of zirconia and titanium abutments with different diameters. Materials and methods Fourteen groups of abutments including prefabricated zirconia, copy-milled zirconia and titanium abutments of an implant system (XiVE, Dentsply) were prepared in different diameters. An increasing vertical load was applied to each specimen until failure occurred. Fracture resistance was measured in each group using the universal testing machine. Moreover, the failure modes were studied and categorized as abutment screw fracture, connection area fracture, abutment body fracture, abutment body distortion, screw distortion and connection area distortion. Groups were statistically compared using univariate and post-hoc tests. The level of statistical significance was set at 5%. Results Fabrication method (p = 0.03) and diameter (p < 0.001) had significant effect on the fracture resistance of abutments. Fracture resistance of abutments with 5.5 mm diameter was higher than other diameters (p < 0.001). The observed modes of failure were dependent on the abutment material as well. All of the prefabricated titanium abutments fractured within the abutment screw. Abutment screw distortion, connection area fracture, and abutment body fracture were the common failure type in other groups. Conclusion Diameter had a significant effect on fracture resistance of implant abutments, as abutments with greater diameters were more resistant to static loads. Copy-milled abutments showed lower fracture resistance as compared to other experimental groups. Clinical significance Although zirconia abutments have received great popularity among clinicians and even patients selecting them for narrow implants should be with caution. How to cite this article Shabanpour R, Mousavi N, Ghodsi S, Alikhasi M. Comparative Evaluation of Fracture Resistance and Mode of Failure of Zirconia and Titanium Abutments with Different Diameters. J Contemp Dent Pract 2015;16(8):613-618.

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In vitro effect of chlorhexidine gel on torque and detorque values of implant abutment screw

Indian Journal of Dental Research ◽

10.4103/ijdr.ijdr_459_16 ◽

2017 ◽

Vol 28 (3) ◽

pp. 314

Author(s):

BardiaVadiati Saberi ◽

HamidNeshandar Asli ◽

ArezooSadat Fatemi

Keyword(s):

Implant Abutment ◽

Vitro Effect ◽

Chlorhexidine Gel ◽

Abutment Screw

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The Evolution of External and Internal Implant–Abutment Connections: A Review

International Dental Research ◽

10.5577/intdentres.2012.vol2.no2.3 ◽

2012 ◽

Vol 2 (2) ◽

pp. 37

Author(s):

D.R. Prithviraj ◽

Ninad Muley ◽

Vikas Gupta

Keyword(s):

Native Speakers ◽

Screw Loosening ◽

Implant Abutment ◽

Primary Determinant ◽

Native Speakers Of English ◽

Over Time ◽

Abutment Screw

A study of the implant–abutment connection is of great importance because it is the primary determinant of the strength and stability of an implant-supported restoration, which, in turn, determines the restoration’s prosthetic stability. Traditionally, Brånemark’s external hexagon has been used, but significant complications, such as abutment screw loosening, rotational misfit at the implant–abutment interface, and microbial penetration have led to modification of the external hexagon and the development of internal implant–abutment connections. In this review, we describe various implant–abutment connections that have evolved over time from the traditional external hexagon. How to cite this article: Alharissy M, Dayoub S. The Evolution of External and Internal Implant–Abutment Connections: A Review. Int Dent Res 2012;2:37-42. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

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