A preliminary study of hardness and modulus of elasticity in sheep mandibles submitted to distraction osteogenesis and low-level laser therapy

Detalhes bibliográficos
Autor(a) principal: Freddo, Angelo Luiz
Data de Publicação: 2012
Outros Autores: Hubler, Roberto, Beck, Carlos Afonso de Castro, Heitz, Claiton, Oliveira, Marilia Gerhardt de
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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spelling 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
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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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