Radiographic assessment of bone density around integrated titanium implants after ovariectomy in rats

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dc.contributor.authorSakakura, C. E.
dc.contributor.authorGiro, G.
dc.contributor.authorGoncalves, D.
dc.contributor.authorPereira, RMR
dc.contributor.authorOrrico, Silvana Regina Perez [UNESP]
dc.contributor.authorMarcantonio Júnior, Elcio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-02-26T17:24:27Z
dc.date.accessioned2014-05-20T13:45:03Z
dc.date.available2014-02-26T17:24:27Z
dc.date.available2014-05-20T13:45:03Z
dc.date.issued2006-04-01
dc.description.abstractObjectives:This study evaluated the influence of ovariectomy 8 weeks after implant placement on bone integrated to titanium implants.Materials and methods:Thirty-eight female rats were submitted to a titanium implant at the tibiae proximal methaphysis. After a healing period of 8 weeks the animals were randomly divided into three groups: control (CTL-10 animals), sham-operated (SHAM-14 animals) and ovariectomy (OVX-14 animals). The CTL group was then sacrificed in order to confirm integration of the implant. The SHAM group was submitted to fictitious surgery and the OVX group was submitted to bilateral ovariectomy. After 12 weeks post-implant placement, the SHAM and OVX groups were sacrificed. In order to confirm the systemic osteopenia in rats, a dual-energy X-ray absorptiometry (DXA) was performed. For the evaluation of bone density, digital radiographs were taken. The grey level of the bone adjacent to implant was measured using image software and the bone density was calculated at six points on both sides of the implant.Results:Densitometry measurements of the femur confirmed systemic bone mass loss in the OVX group. Individualized bone analyses of different regions surrounding the implant showed a significantly lower radiographic bone density (P < 0.05) in the cancellous region of the OVX group (77.48 +/- 23.39 grey levels) when compared with the CTL and SHAM groups (91.61 +/- 32.10 and 102.57 +/- 32.50 grey levels, respectively).Conclusions:The present study showed a decrease of the radiographic bone density in the cancellous region of bone around titanium implants placed 8 weeks before ovariectomy in rats.en
dc.description.affiliationUNESP, Sch Dent, Dept Oral Diagnosis & Surg, Araraquara, SP, Brazil
dc.description.affiliationUniv São Paulo, Sch Med, Dept Rheumatol, São Paulo, Brazil
dc.description.affiliationUnespUNESP, Sch Dent, Dept Oral Diagnosis & Surg, Araraquara, SP, Brazil
dc.format.extent134-138
dc.identifierhttp://dx.doi.org/10.1111/j.1600-0501.2005.01224.x
dc.identifier.citationClinical Oral Implants Research. Oxford: Blackwell Publishing, v. 17, n. 2, p. 134-138, 2006.
dc.identifier.doi10.1111/j.1600-0501.2005.01224.x
dc.identifier.issn0905-7161
dc.identifier.lattes7383391319292040
dc.identifier.lattes6100859465871929
dc.identifier.urihttp://hdl.handle.net/11449/15811
dc.identifier.wosWOS:000235891700004
dc.language.isoeng
dc.publisherBlackwell Publishing
dc.relation.ispartofClinical Oral Implants Research
dc.relation.ispartofjcr4.305
dc.relation.ispartofsjr2,462
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbone densitypt
dc.subjectdigital radiographpt
dc.subjectovariectomypt
dc.subjecttitanium implantspt
dc.titleRadiographic assessment of bone density around integrated titanium implants after ovariectomy in ratsen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderBlackwell Publishing
unesp.author.lattes7383391319292040
unesp.author.lattes6100859465871929
unesp.author.orcid0000-0003-1294-2305[6]
unesp.author.orcid0000-0002-7590-8158[2]
unesp.author.orcid0000-0002-3723-5028[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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