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An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures

AIM: The aim of this in vitro study was to compare the change in the retentive force and removal torque of three attachment systems during simulation of insertion-removal cycles. METHODOLOGY: Edentulous mandibular models were made with heat-cured polymethyl methacrylate resin. Two implant replicas (...

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Autores principales: Shastry, Tejomaya, Anupama, N. M., Shetty, Shilpa, Nalinakshamma, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4837765/
https://www.ncbi.nlm.nih.gov/pubmed/27141166
http://dx.doi.org/10.4103/0972-4052.176520
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author Shastry, Tejomaya
Anupama, N. M.
Shetty, Shilpa
Nalinakshamma, M.
author_facet Shastry, Tejomaya
Anupama, N. M.
Shetty, Shilpa
Nalinakshamma, M.
author_sort Shastry, Tejomaya
collection PubMed
description AIM: The aim of this in vitro study was to compare the change in the retentive force and removal torque of three attachment systems during simulation of insertion-removal cycles. METHODOLOGY: Edentulous mandibular models were made with heat-cured polymethyl methacrylate resin. Two implant replicas (CMI), of 3.75 mm diameter and 10 mm length, were placed in the intraforaminal region. Acrylic resin mandibular overdentures were fabricated and provision was made to receive three different overdenture attachment systems, prefabricated ball/o-ring attachment (Lifecare Biosystems, Thane, India), Hader bar and clip attachment (Sterngold, Attleboro, MA), and Locator(®) implant overdenture attachment stud type (Zest Anchors LLC, USA). Using a universal testing machine, each of the models were subjected to 100 pulls each to dislodge the overdenture from the acrylic model, and the force values as indicated on the digital indicator were tabulated both before and after thermocycling (AT). STATISTICAL ANALYSIS USED: Statistical analysis comprised Kolmogorov–Smirnov test, Friedman test, and Wilcoxon signed ranks test. RESULTS: The statistical model revealed a significantly different behavior of the attachment systems both before and AT. The ball/o-ring and bar attachments developed higher retentive force as compared to the locator attachment. The bar and clip attachment exhibited the highest peak as well as the highest mean retention force at the end of the study. The Locator(®) attachment showed a decrease in retentive potential after an early peak. CONCLUSIONS AND CLINICAL IMPLICATIONS: The ball/o-ring and bar and clip attachments exhibit higher retentive capacities than the Locator(®) attachment over time.
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spelling pubmed-48377652017-04-01 An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures Shastry, Tejomaya Anupama, N. M. Shetty, Shilpa Nalinakshamma, M. J Indian Prosthodont Soc Original Article AIM: The aim of this in vitro study was to compare the change in the retentive force and removal torque of three attachment systems during simulation of insertion-removal cycles. METHODOLOGY: Edentulous mandibular models were made with heat-cured polymethyl methacrylate resin. Two implant replicas (CMI), of 3.75 mm diameter and 10 mm length, were placed in the intraforaminal region. Acrylic resin mandibular overdentures were fabricated and provision was made to receive three different overdenture attachment systems, prefabricated ball/o-ring attachment (Lifecare Biosystems, Thane, India), Hader bar and clip attachment (Sterngold, Attleboro, MA), and Locator(®) implant overdenture attachment stud type (Zest Anchors LLC, USA). Using a universal testing machine, each of the models were subjected to 100 pulls each to dislodge the overdenture from the acrylic model, and the force values as indicated on the digital indicator were tabulated both before and after thermocycling (AT). STATISTICAL ANALYSIS USED: Statistical analysis comprised Kolmogorov–Smirnov test, Friedman test, and Wilcoxon signed ranks test. RESULTS: The statistical model revealed a significantly different behavior of the attachment systems both before and AT. The ball/o-ring and bar attachments developed higher retentive force as compared to the locator attachment. The bar and clip attachment exhibited the highest peak as well as the highest mean retention force at the end of the study. The Locator(®) attachment showed a decrease in retentive potential after an early peak. CONCLUSIONS AND CLINICAL IMPLICATIONS: The ball/o-ring and bar and clip attachments exhibit higher retentive capacities than the Locator(®) attachment over time. Medknow Publications & Media Pvt Ltd 2016 /pmc/articles/PMC4837765/ /pubmed/27141166 http://dx.doi.org/10.4103/0972-4052.176520 Text en Copyright: © The Journal of Indian Prosthodontic Society http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
spellingShingle Original Article
Shastry, Tejomaya
Anupama, N. M.
Shetty, Shilpa
Nalinakshamma, M.
An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
title An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
title_full An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
title_fullStr An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
title_full_unstemmed An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
title_short An in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
title_sort in vitro comparative study to evaluate the retention of different attachment systems used in implant-retained overdentures
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4837765/
https://www.ncbi.nlm.nih.gov/pubmed/27141166
http://dx.doi.org/10.4103/0972-4052.176520
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