Cargando…

In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition

The purpose of this study was to investigate the effects of implant position and loading position on biomechanical behaviors using implant-supported removable partial denture (ISRPD) models in a simulated Kennedy class Ⅱ partially edentulous mandible. Three types of Kennedy class Ⅱ mandibular acryli...

Descripción completa

Detalles Bibliográficos
Autores principales: Kihara, Masafumi, Ogino, Yoichiro, Matsushita, Yasuyuki, Morita, Takehiro, Sawae, Yoshinori, Ayukawa, Yasunori, Koyano, Kiyoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8122922/
https://www.ncbi.nlm.nih.gov/pubmed/33922523
http://dx.doi.org/10.3390/ma14092145
_version_ 1783692755853115392
author Kihara, Masafumi
Ogino, Yoichiro
Matsushita, Yasuyuki
Morita, Takehiro
Sawae, Yoshinori
Ayukawa, Yasunori
Koyano, Kiyoshi
author_facet Kihara, Masafumi
Ogino, Yoichiro
Matsushita, Yasuyuki
Morita, Takehiro
Sawae, Yoshinori
Ayukawa, Yasunori
Koyano, Kiyoshi
author_sort Kihara, Masafumi
collection PubMed
description The purpose of this study was to investigate the effects of implant position and loading position on biomechanical behaviors using implant-supported removable partial denture (ISRPD) models in a simulated Kennedy class Ⅱ partially edentulous mandible. Three types of Kennedy class Ⅱ mandibular acrylic resin models (a conventional RPD without support by an implant—CRPD; models with an implant placed at first molar (#46)—MP-ISRPD— and second molar (#47)—DP-ISRPD) were used to measure vertical displacement of the RPD, mesio-distal displacement of the abutment tooth, and bending moment of the abutment tooth and implant under one-point loading. The variables at three respective loading points (#45, #46 and #47) were compared statistically. Vertical displacement was suppressed in ISRPDs compared to the CRPD, and significant effects were identified under loading at the implant position. The largest meiso-distal displacement was observed in MP-ISRPD under #47 loading. Bending moments of the abutment tooth and implant were significantly higher in MP-ISRPD than in DP-ISPRD. In MP-ISRPD, a higher bending moment of the abutment tooth under #45 and #47 loading was detected, although the bending moment in DP-ISRPD was almost zero. The results of this study suggested that MP-ISRPD shows the specific biomechanical behaviors, although DP-ISRPD might provide biomechanical benefits under all one-point loading conditions.
format Online
Article
Text
id pubmed-8122922
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-81229222021-05-16 In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition Kihara, Masafumi Ogino, Yoichiro Matsushita, Yasuyuki Morita, Takehiro Sawae, Yoshinori Ayukawa, Yasunori Koyano, Kiyoshi Materials (Basel) Article The purpose of this study was to investigate the effects of implant position and loading position on biomechanical behaviors using implant-supported removable partial denture (ISRPD) models in a simulated Kennedy class Ⅱ partially edentulous mandible. Three types of Kennedy class Ⅱ mandibular acrylic resin models (a conventional RPD without support by an implant—CRPD; models with an implant placed at first molar (#46)—MP-ISRPD— and second molar (#47)—DP-ISRPD) were used to measure vertical displacement of the RPD, mesio-distal displacement of the abutment tooth, and bending moment of the abutment tooth and implant under one-point loading. The variables at three respective loading points (#45, #46 and #47) were compared statistically. Vertical displacement was suppressed in ISRPDs compared to the CRPD, and significant effects were identified under loading at the implant position. The largest meiso-distal displacement was observed in MP-ISRPD under #47 loading. Bending moments of the abutment tooth and implant were significantly higher in MP-ISRPD than in DP-ISPRD. In MP-ISRPD, a higher bending moment of the abutment tooth under #45 and #47 loading was detected, although the bending moment in DP-ISRPD was almost zero. The results of this study suggested that MP-ISRPD shows the specific biomechanical behaviors, although DP-ISRPD might provide biomechanical benefits under all one-point loading conditions. MDPI 2021-04-23 /pmc/articles/PMC8122922/ /pubmed/33922523 http://dx.doi.org/10.3390/ma14092145 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kihara, Masafumi
Ogino, Yoichiro
Matsushita, Yasuyuki
Morita, Takehiro
Sawae, Yoshinori
Ayukawa, Yasunori
Koyano, Kiyoshi
In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition
title In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition
title_full In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition
title_fullStr In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition
title_full_unstemmed In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition
title_short In Vitro Assessment of the Effect of Implant Position on Biomechanical Behaviors of Implant-Supported Removable Partial Dentures in Kennedy Class II Condition
title_sort in vitro assessment of the effect of implant position on biomechanical behaviors of implant-supported removable partial dentures in kennedy class ii condition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8122922/
https://www.ncbi.nlm.nih.gov/pubmed/33922523
http://dx.doi.org/10.3390/ma14092145
work_keys_str_mv AT kiharamasafumi invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition
AT oginoyoichiro invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition
AT matsushitayasuyuki invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition
AT moritatakehiro invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition
AT sawaeyoshinori invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition
AT ayukawayasunori invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition
AT koyanokiyoshi invitroassessmentoftheeffectofimplantpositiononbiomechanicalbehaviorsofimplantsupportedremovablepartialdenturesinkennedyclassiicondition