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Effect of crown to implant ratio and implantoplasty on the fracture resistance of narrow dental implants with marginal bone loss: an in vitro study

2020-12Journal article Open access
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dc.contributor.authorLeitão-Almeida, Bruno
dc.contributor.authorCamps-Font, Octavi
dc.contributor.authorCorreia, André
dc.contributor.authorMir-Mari, Javier
dc.contributor.authorFigueiredo, Rui
dc.contributor.authorValmaseda-Castellón, Eduard
dc.date.accessioned2021-03-16T14:22:48Z
dc.date.available2021-03-16T14:22:48Z
dc.date.issued2020-12
dc.description.abstractBackground: Peri-implantitis is a biological complication that affects soft and hard tissues around dental implants. Implantoplasty (IP) polishes the exposed implant surface, to decontaminate it and make it less prone to bacterial colonization. This study investigates whether a higher clinical crown-to-implant-ratio (CIR) reduces implant fracture resistance and whether implants are more fracture-prone after IP in the presence of 50% of bone loss. Methods: Forty-eight narrow platform (3.5 mm) 15 mm long titanium dental implants with a rough surface and hexagonal external connection were placed in standardized bone-like resin casts leaving 7.5 mm exposed. Half were selected for IP. The IP and control groups were each divided into 3 subgroups with different clinical CIRs (2:1, 2.5:1 and 3:1). The implant wall width measurements were calculated using the software ImageJ v.1.51 through the analysis of plain x-ray examination of all the samples using standardized mounts. A fracture test was performed and scanning electron microscopy was used to evaluate maximum compression force (Fmax) and implant fractures. Results: IP significantly reduced the implant wall width (P < 0.001) in all reference points of each subgroup. Fmax was significantly higher in the 2:1 subgroup (control = 1276.16 N ± 169.75; IP = 1211.70 N ± 281.64) compared with the 2.5:1 (control = 815.22 N ± 185.58, P < 0.001; IP = 621.68 N ± 186.28, P < 0.001) and the 3:1 subgroup (control = 606.55 N ± 111.48, P < 0.001; IP = 465.95 N ± 68.57, P < 0.001). Only the 2.5:1 subgroup showed a significant reduction (P = 0.037) of the Fmax between the controls and the IP implants. Most fractures were located in the platform area. Only 5 implants with IP of the 2:1 CIR subgroup had a different fracture location (4 fractures in the implant body and 1 in the prosthetic screw). Conclusions: IP significantly reduces the fracture resistance of implants with a 2.5:1 CIR. The results also suggest that the CIR seems to be a more relevant variable when considering the resistance to fracture of implants, since significant reductions were observed when unfavorable CIR subgroups (2.5:1 and 3:1 CIR) were compared with the 2:1 CIR samples.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1186/s12903-020-01323-z
dc.identifier.eid85096311625
dc.identifier.issn1472-6831
dc.identifier.pmcPMC7678153
dc.identifier.pmid33213442
dc.identifier.urihttp://hdl.handle.net/10400.14/32220
dc.identifier.wos000595703500001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCompressive strengthpt_PT
dc.subjectDental implantspt_PT
dc.subjectImplantoplastypt_PT
dc.subjectPeri-implantitispt_PT
dc.subjectTitaniumpt_PT
dc.titleEffect of crown to implant ratio and implantoplasty on the fracture resistance of narrow dental implants with marginal bone loss: an in vitro studypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue1pt_PT
oaire.citation.titleBMC Oral Healthpt_PT
oaire.citation.volume20pt_PT
person.familyNameCamps Font
person.familyNameCorreia
person.familyNameFigueiredo
person.familyNameValmaseda-Castellon
person.givenNameOctavi
person.givenNameAndre
person.givenNameRui
person.givenNameEduard
person.identifierR-000-NAN
person.identifier.ciencia-idDC19-CAE4-44C1
person.identifier.orcid0000-0001-9991-2226
person.identifier.orcid0000-0002-0119-9790
person.identifier.orcid0000-0002-2122-6530
person.identifier.orcid0000-0001-9669-3187
person.identifier.ridA-5330-2010
person.identifier.ridC-2428-2008
person.identifier.scopus-author-id56681218200
person.identifier.scopus-author-id55418261400
person.identifier.scopus-author-id23004145100
person.identifier.scopus-author-id6602100038
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication80810ed0-f9f2-4f0f-9192-e8b718d54be3
relation.isAuthorOfPublication527f4107-3454-4a7f-aa6e-029a17f330d2
relation.isAuthorOfPublication25f8d122-cc9e-4c64-a3f7-0197def1457e
relation.isAuthorOfPublication.latestForDiscovery80810ed0-f9f2-4f0f-9192-e8b718d54be3

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