Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs

Purpose: The vertical location of the implant-abutment connection influences the subsequent reaction of the peri-implant bone. It is not known, however, whether any additional influence is exerted by different microgap configurations. Therefore, the radiographic bone reactions of two different impla...

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Autores: Weng, Dietmar, Nagata, Maria José Hitomi, Bosco, Alvaro Francisco [UNESP], De Melo, Luiz Gustavo Nascimento
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:Brasil
Institución:Universidade Estadual Paulista (UNESP)
Repositorio:Repositório Institucional da UNESP
Idioma:inglés
OAI Identifier:oai:repositorio.unesp.br:11449/226719
Acceso en línea:http://hdl.handle.net/11449/226719
Access Level:acceso abierto
Palabra clave:Bone morphology
Crestal implant placement
Implant-abutment microgap
Radiographic study
Subcrestal placement
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spelling Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogsBone morphologyCrestal implant placementImplant-abutment microgapRadiographic studySubcrestal placementPurpose: The vertical location of the implant-abutment connection influences the subsequent reaction of the peri-implant bone. It is not known, however, whether any additional influence is exerted by different microgap configurations. Therefore, the radiographic bone reactions of two different implant systems were monitored for 6 months. Materials and Methods: In eight mongrel dogs, two implants with an internal Morse-taper connection (INT group) were placed on one side of the mandible; the contralateral side received two implants with an external-hex connection (EXT group). On each side, one implant was aligned at the bone level (equicrestal) and the second implant was placed 1.5 mm subcrestal. Healing abutments were placed 3 months after submerged healing, and the implants were maintained for another 3 months without prosthetic loading. At implant placement and after 1, 2, 3, 4, 5, and 6 months, standardized radiographs were obtained, and peri-implant bone levels were measured with regard to microgap location and evaluated statistically. Results: All implants osseointegrated clinically and radiographically. The overall mean bone loss was 0.68 ± 0.59 mm in the equicrestal INT group, 1.32 ± 0.49 mm in the equicrestal EXT group, 0.76 ± 0.49 mm in the subcrestal INT group, and 1.88 ± 0.81 mm in the subcrestal EXT group. The differences between the INT and EXT groups were statistically significant (paired t tests). The first significant differences between the internal and external groups were seen at month 1 in the subcrestal groups and at 3 months in the equicrestal groups. Bone loss was most pronounced in the subcrestal EXT group. Conclusions: Within the limits of this study, different microgap configurations can cause different amounts of bone loss, even before prosthetic loading. Subcrestal placement of a butt-joint microgap design may lead to more pronounced radiographic bone loss. © 2011 by Quintessence Publishing Co Inc.Department of Prosthodontics Propaedeutics and Dental Materials School of Dentistry Christian-Albrechts- University at KielDivision of Periodontics Department of Surgery and Integrated Clinic Dental School of Araçatuba Universidade Estadual Paulista, AraçatubaDivision of Periodontics Department of Surgery and Integrated Clinic Dental School of Araçatuba Universidade Estadual Paulista, AraçatubaChristian-Albrechts- University at KielUniversidade Estadual Paulista (UNESP)2022-04-29T02:43:32Z2022-04-29T02:43:32Z2011-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article941-946International Journal of Oral and Maxillofacial Implants, v. 26, n. 5, p. 941-946, 2011.0882-2786http://hdl.handle.net/11449/2267192-s2.0-84857387380Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Oral and Maxillofacial Implantsinfo:eu-repo/semantics/openAccessWeng, DietmarNagata, Maria José HitomiBosco, Alvaro Francisco [UNESP]De Melo, Luiz Gustavo Nascimento2025-03-12T08:03:34Zoai:repositorio.unesp.br:11449/226719Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462025-03-12T08:03:34Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
title Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
spellingShingle Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
Weng, Dietmar
Bone morphology
Crestal implant placement
Implant-abutment microgap
Radiographic study
Subcrestal placement
title_short Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
title_full Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
title_fullStr Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
title_full_unstemmed Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
title_sort Influence of microgap location and configuration on radiographic bone loss around submerged implants: An experimental study in dogs
dc.creator.none.fl_str_mv Weng, Dietmar
Nagata, Maria José Hitomi
Bosco, Alvaro Francisco [UNESP]
De Melo, Luiz Gustavo Nascimento
author Weng, Dietmar
author_facet Weng, Dietmar
Nagata, Maria José Hitomi
Bosco, Alvaro Francisco [UNESP]
De Melo, Luiz Gustavo Nascimento
author_role author
author2 Nagata, Maria José Hitomi
Bosco, Alvaro Francisco [UNESP]
De Melo, Luiz Gustavo Nascimento
author2_role author
author
author
dc.contributor.none.fl_str_mv Christian-Albrechts- University at Kiel
Universidade Estadual Paulista (UNESP)
dc.subject.por.fl_str_mv Bone morphology
Crestal implant placement
Implant-abutment microgap
Radiographic study
Subcrestal placement
topic Bone morphology
Crestal implant placement
Implant-abutment microgap
Radiographic study
Subcrestal placement
description Purpose: The vertical location of the implant-abutment connection influences the subsequent reaction of the peri-implant bone. It is not known, however, whether any additional influence is exerted by different microgap configurations. Therefore, the radiographic bone reactions of two different implant systems were monitored for 6 months. Materials and Methods: In eight mongrel dogs, two implants with an internal Morse-taper connection (INT group) were placed on one side of the mandible; the contralateral side received two implants with an external-hex connection (EXT group). On each side, one implant was aligned at the bone level (equicrestal) and the second implant was placed 1.5 mm subcrestal. Healing abutments were placed 3 months after submerged healing, and the implants were maintained for another 3 months without prosthetic loading. At implant placement and after 1, 2, 3, 4, 5, and 6 months, standardized radiographs were obtained, and peri-implant bone levels were measured with regard to microgap location and evaluated statistically. Results: All implants osseointegrated clinically and radiographically. The overall mean bone loss was 0.68 ± 0.59 mm in the equicrestal INT group, 1.32 ± 0.49 mm in the equicrestal EXT group, 0.76 ± 0.49 mm in the subcrestal INT group, and 1.88 ± 0.81 mm in the subcrestal EXT group. The differences between the INT and EXT groups were statistically significant (paired t tests). The first significant differences between the internal and external groups were seen at month 1 in the subcrestal groups and at 3 months in the equicrestal groups. Bone loss was most pronounced in the subcrestal EXT group. Conclusions: Within the limits of this study, different microgap configurations can cause different amounts of bone loss, even before prosthetic loading. Subcrestal placement of a butt-joint microgap design may lead to more pronounced radiographic bone loss. © 2011 by Quintessence Publishing Co Inc.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01
2022-04-29T02:43:32Z
2022-04-29T02:43:32Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv International Journal of Oral and Maxillofacial Implants, v. 26, n. 5, p. 941-946, 2011.
0882-2786
http://hdl.handle.net/11449/226719
2-s2.0-84857387380
identifier_str_mv International Journal of Oral and Maxillofacial Implants, v. 26, n. 5, p. 941-946, 2011.
0882-2786
2-s2.0-84857387380
url http://hdl.handle.net/11449/226719
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv International Journal of Oral and Maxillofacial Implants
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 941-946
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv repositoriounesp@unesp.br
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score 15,228081

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