In Vitro Sealing Ability of Two Materials at Five Different Implant‐Abutment Surfaces

Duarte, Antônio Ricardo Calazans; Rossetti, Paulo Henrique Orlato; Rossetti, Leylha Maria Nunes; Torres, Sérgio Aparecido; Bonachela, Wellington Cardoso

doi:10.1902/jop.2006.060101

Cited by 53 publications

(72 citation statements)

References 12 publications

(14 reference statements)

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“…Morse taper implant systems provided a better seal compared with external hexagonal systems with respect to the amount and time of bacterial leakage, Duarte et al 29 found that bacteria penetrated the internal aspect of implants from the outside media regardless of the internal or external hexagonal connection. The results of the present investigation agree with those reported by Jansen et al, 30 in which the three conical abutment interfaces evaluated showed evidence of leakage.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Türkyilmaz¹,

Black²,

Chong³

2017

The Journal of Contemporary Dental Practice

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Aim:The purpose of this in vitro investigation was to evaluate the sealing capability of the conical implant-abutment interfaces under different abutment screw torque values using titanium and zirconia abutments with Morse taper designs. Materials and methods:A total of 42 dental implants (n = 21 for titanium abutments and n = 21 for zirconia abutments) were inoculated internally with three bacteria. These assemblies were divided into four test groups (n = 10) based on screw fixation torques of 35 or 20 Ncm and placed in sterile broth; the remaining abutments were used as positive controls and torqued to 10 Ncm. Microleakage was quantified by enumerating the bacteria from the colony-forming units. An analysis of variance for the estimates of bacteria enumerated and microgaps was used with a post hoc analysis as indicated. A p-value of 0.05 was used as the level of significance.Results: There was no statistically significant difference in microleakage among the four test groups; there were no significant effects of screw torque or abutment type on the bacteria enumerated. There was a significantly smaller mean microgap with the zirconia abutments. Evaluation of the Sealing Conclusion:The results of this study indicated no statistically significant difference in the sealing capabilities between titanium and zirconia abutments, having internal conical connections, after increasing the abutment screw torque.Clinical significance: It is important for clinicians to follow the guidelines suggested by the implant companies to avoid biomechanical complications over time.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Türkyilmaz¹,

Black²,

Chong³

2017

The Journal of Contemporary Dental Practice

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“…Previous studies [8][9][10][11] have demonstrated that platform-switched abutments may not only reduce the early peri-implant bone loss and increase the biomechanical support available to the implant, but also may improve esthetics. Baumgarten and coworkers [6] suggested that the platform switching technique is useful when shorter implants are used, when implants are placed in esthetic zone, and when a larger implant is desirable but prosthetic space is limited.…”

Section: Discussionmentioning

confidence: 99%

“…This connection shifts the perimeter of the implant-abutment junction inward towards the central axis (the middle of the implant), potentially improving the distribution of forces and placing the implant-abutment gap away from the peri-implant bone [4,5]. It has been suggested that the inward shift of the implant-abutment gap may physically minimize the impact of the inflammatory cell infiltrate in the peri implant tissues, potentially reducing bone loss [2,[6][7][8][9][10][11]. From a biomechanical perspective, previous in vitro studies [12][13][14][15][16][17] have shown reduced levels of stress on peri-implant bone in platform-switched implants relative to matched implant-abutment diameters.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical evaluation of internal and external hexagon platform switched implant-abutment connections: An in vitro laboratory and three-dimensional finite element analysis

et al. 2012

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d e n t a l m a t e r i a l s 2 8 ( 2 0 1 2 ) e218-e228Available online at www.sciencedirect.com j o u r n a l h o m e p a g e : w w w . i n t l . e l s e v i e r h e a l t h . c o m / j o u r n a l s / d e m a Objectives. The aim of this study was to assess the effect of abutment's diameter shifting on reliability and stress distribution within the implant-abutment connection for internal and external hexagon implants. The postulated hypothesis was that platform-switched implants would result in increased stress concentration within the implant-abutment connection, leading to the systems' lower reliability.Methods. Eighty-four implants were divided in four groups (n = 21): REG-EH and SWT-EH (regular and switched-platform implants with external connection, respectively); REG-IH and SWT-IH (regular and switched-platform implants with internal connection, respectively).The corresponding abutments were screwed to the implants and standardized maxillary central incisor metal crowns were cemented and subjected to step-stress accelerated life testing. Use-level probability Weibull curves and reliability were calculated. Four finite element models reproducing the characteristics of specimens used in laboratory testing were created. The models were full constrained on the bottom and lateral surface of the cylinder of acrylic resin and one 30 • off-axis load (300 N) was applied on the lingual side of the crown (close to the incisal edge) in order to evaluate the stress distribution (s vM ) within the implant-abutment complex.

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“…Clinical and in vitro evaluations indicate that connections between components are more stable in the internal hexagonal system, in which the larger contact area between internal implant and abutments walls favors force distribution and preserves the abutment screw (Norton et al, 1997;Mollersten et al, 1997;Binon et al, 2000;Finger et al, 2003). Microbiological studies, however, do not show significant differences between hexagonal internal or external connections, when bacterial leakage is concerned (Jansen et al, 1997;Steinebrunner et al, 2005;Duarte et al, 2006). The Morse cone connection system has recently been introduced and is becoming increasingly popular in implant dentistry.…”

Section: Design Features and Marginal Fit Of Implant Componentsmentioning

confidence: 99%

Bacterial Leakage Along the Implant-Abutment Interface

Nascimento¹,

Albuquerque²

2011

Implant Dentistry - The Most Promising Discipline of Dentistry

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In Vitro Sealing Ability of Two Materials at Five Different Implant‐Abutment Surfaces

Cited by 53 publications

References 12 publications

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Evaluation of the Sealing Capability of the Internal Conical Connections of Implants with Titanium and Zirconia Abutments

Biomechanical evaluation of internal and external hexagon platform switched implant-abutment connections: An in vitro laboratory and three-dimensional finite element analysis

Bacterial Leakage Along the Implant-Abutment Interface

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