A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/61362 |
Resumo: | Objectives: To investigate the quality of newly formed bone in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy (LLLT), based on hardness and modulus of elasticity values. The ideal moment for laser application (during the latency/activation period vs. during the bone consolidation period) was also evaluated. Computed tomography imaging was used to assess relapse as a result of early device removal. Study design: Extraoral distraction devices were placed in five sheep so as to achieve 1.5 cm of lengthened bone in 60 days. Distraction devices were removed 50, 40, and 33 days after surgery. Four animals were treated with LLLT, at different times, and one was used as control (no LLLT). Results: When applied during the bone consolidation period, LLLT caused an increase in hardness and modulus of elasticity values. On the other hand, animals irradiated with LLLT during the latency/activation period presented a delay in bone healing. A period of consolidation of 13 days (early device removal) was associated with relapse. Conclusions: Nanoindentation tests were able to detect slight abnormalities in bone metabolism and proved to be important tools for the assessment of bone quality following distraction osteogenesis. LLLT provided increased benefits when applied during the bone consolidation period, once it promoted an increase in hardness and modulus of elasticity values. According to our results, the bone consolidation period should be of at least 3 weeks, so as to prevent relapse. |
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Freddo, Angelo LuizHubler, RobertoBeck, Carlos Afonso de CastroHeitz, ClaitonOliveira, Marilia Gerhardt de2012-11-24T01:43:38Z2012http://hdl.handle.net/10183/61362000819061Objectives: To investigate the quality of newly formed bone in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy (LLLT), based on hardness and modulus of elasticity values. The ideal moment for laser application (during the latency/activation period vs. during the bone consolidation period) was also evaluated. Computed tomography imaging was used to assess relapse as a result of early device removal. Study design: Extraoral distraction devices were placed in five sheep so as to achieve 1.5 cm of lengthened bone in 60 days. Distraction devices were removed 50, 40, and 33 days after surgery. Four animals were treated with LLLT, at different times, and one was used as control (no LLLT). Results: When applied during the bone consolidation period, LLLT caused an increase in hardness and modulus of elasticity values. On the other hand, animals irradiated with LLLT during the latency/activation period presented a delay in bone healing. A period of consolidation of 13 days (early device removal) was associated with relapse. Conclusions: Nanoindentation tests were able to detect slight abnormalities in bone metabolism and proved to be important tools for the assessment of bone quality following distraction osteogenesis. LLLT provided increased benefits when applied during the bone consolidation period, once it promoted an increase in hardness and modulus of elasticity values. According to our results, the bone consolidation period should be of at least 3 weeks, so as to prevent relapse.application/pdfengMedicina oral, patología oral y cirugía bucal [recurso eletrônico]. Valencia. Vol. 17, no. 1 (Jan. 2012), p. e102-e107Laser na odontologiaCirurgia bucalOsteogenesis distractionLow-level laser therapyElastic modulusHardness testsA preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapyEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000819061.pdf000819061.pdfTexto completo (inglês)application/pdf437366http://www.lume.ufrgs.br/bitstream/10183/61362/1/000819061.pdf08ab70be6f8624bbb9b5aa07e7ad3c12MD51TEXT000819061.pdf.txt000819061.pdf.txtExtracted Texttext/plain26766http://www.lume.ufrgs.br/bitstream/10183/61362/2/000819061.pdf.txte9054fe20868d9104a5b89486a4f02d2MD52THUMBNAIL000819061.pdf.jpg000819061.pdf.jpgGenerated Thumbnailimage/jpeg1798http://www.lume.ufrgs.br/bitstream/10183/61362/3/000819061.pdf.jpg47b15a02e9e316dd3bc32a937233d571MD5310183/613622018-10-16 08:02:40.462oai:www.lume.ufrgs.br:10183/61362Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-16T11:02:40Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
title |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
spellingShingle |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy Freddo, Angelo Luiz Laser na odontologia Cirurgia bucal Osteogenesis distraction Low-level laser therapy Elastic modulus Hardness tests |
title_short |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
title_full |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
title_fullStr |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
title_full_unstemmed |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
title_sort |
A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy |
author |
Freddo, Angelo Luiz |
author_facet |
Freddo, Angelo Luiz Hubler, Roberto Beck, Carlos Afonso de Castro Heitz, Claiton Oliveira, Marilia Gerhardt de |
author_role |
author |
author2 |
Hubler, Roberto Beck, Carlos Afonso de Castro Heitz, Claiton Oliveira, Marilia Gerhardt de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Freddo, Angelo Luiz Hubler, Roberto Beck, Carlos Afonso de Castro Heitz, Claiton Oliveira, Marilia Gerhardt de |
dc.subject.por.fl_str_mv |
Laser na odontologia Cirurgia bucal |
topic |
Laser na odontologia Cirurgia bucal Osteogenesis distraction Low-level laser therapy Elastic modulus Hardness tests |
dc.subject.eng.fl_str_mv |
Osteogenesis distraction Low-level laser therapy Elastic modulus Hardness tests |
description |
Objectives: To investigate the quality of newly formed bone in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy (LLLT), based on hardness and modulus of elasticity values. The ideal moment for laser application (during the latency/activation period vs. during the bone consolidation period) was also evaluated. Computed tomography imaging was used to assess relapse as a result of early device removal. Study design: Extraoral distraction devices were placed in five sheep so as to achieve 1.5 cm of lengthened bone in 60 days. Distraction devices were removed 50, 40, and 33 days after surgery. Four animals were treated with LLLT, at different times, and one was used as control (no LLLT). Results: When applied during the bone consolidation period, LLLT caused an increase in hardness and modulus of elasticity values. On the other hand, animals irradiated with LLLT during the latency/activation period presented a delay in bone healing. A period of consolidation of 13 days (early device removal) was associated with relapse. Conclusions: Nanoindentation tests were able to detect slight abnormalities in bone metabolism and proved to be important tools for the assessment of bone quality following distraction osteogenesis. LLLT provided increased benefits when applied during the bone consolidation period, once it promoted an increase in hardness and modulus of elasticity values. According to our results, the bone consolidation period should be of at least 3 weeks, so as to prevent relapse. |
publishDate |
2012 |
dc.date.accessioned.fl_str_mv |
2012-11-24T01:43:38Z |
dc.date.issued.fl_str_mv |
2012 |
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Estrangeiro info:eu-repo/semantics/article |
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000819061 |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Medicina oral, patología oral y cirugía bucal [recurso eletrônico]. Valencia. Vol. 17, no. 1 (Jan. 2012), p. e102-e107 |
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openAccess |
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