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Evaluation of different rotary devices on bone repair in rabbits
Ribeiro Junior, Paulo Domingos; Barleto, Christiane Vespasiano; Ribeiro, Daniel Araki; Matsumoto, Mariza Akemi.
  • Ribeiro Junior, Paulo Domingos; Sacred Heart University. Department of Oral Surgery. Bauru. BR
  • Barleto, Christiane Vespasiano; Sacred Heart University. Department of Oral Surgery. Bauru. BR
  • Ribeiro, Daniel Araki; Federal University of São Paulo. Department of Health Sciences. Santos. BR
  • Matsumoto, Mariza Akemi; Sacred Heart University. Department of Oral Surgery. Bauru. BR
Braz. dent. j ; 18(3): 215-219, 2007. ilus, tab
Article in English | LILACS | ID: lil-471443
ABSTRACT
In oral surgery, the quality of bone repair may be influenced by several factors that can increase the morbidity of the procedure. The type of equipment used for ostectomy can directly affect bone healing. The aim of this study was to evaluate bone repair of mandible bone defects prepared in rabbits using three different rotary devices. Fifteen New Zealand rabbits were randomly assigned to 3 groups (n=5) according to type of rotary device used to create bone defects I - pneumatic low-speed rotation engine, II - pneumatic high-speed rotation engine, and III - electric low-speed rotation engine. The anatomic pieces were surgically obtained after 2, 7 and 30 days and submitted to histological and morphometric analysis. The morphometric results were expressed as the total area of bone remodeling matrix using an image analysis system. Increases in the bone remodeling matrix were noticed with time along the course of the experiment. No statistically significant differences (p>0.05) were observed among the groups at the three sacrificing time points considering the total area of bone mineralized matrix, although the histological analysis showed a slightly advanced bone repair in group III compared to the other two groups. The findings of the present study suggest that the type of rotary device used in oral and maxillofacial surgery does not interfere with the bone repair process.
RESUMO
A ostectomia é uma manobra cirúrgica fundamental que pode afetar a reparação tecidual de modo a aumentar a morbidade do procedimento. O tipo de equipamento e/ou instrumental utilizado para a ostectomia pode influenciar diretamente no reparo ósseo. O objetivo deste trabalho foi analisar o processo de reparação óssea em defeitos realizados em mandíbula de coelho com três diferentes equipamentos. Quinze coelhos foram aleatoriamente divididos em 3 grupos (n=5) de acordo com o equipamento usado para preparacão de 3 cavidades ósseas com brocas padronizadas I) motor de baixa rotação pneumático, II) motor de alta rotação pneumático e III) motor de baixa rotação elétrico, todos com refrigeração constante. Após os períodos experimentais de 2, 7e 30 dias, as peças anatômicas foram removidas e submetidas a análises microscópica e histomorfométrica. Não houve diferença estatisticamente significante (p>0,05) entre os grupos nos 3 períodos experimentais, considerando-se a área total de matriz óssea mineralizada, embora a análise microscópica tenha revelado uma tendência a um processo de reparação óssea um pouco mais adiantado no grupo III, quando comparado aos demais grupos. Os resultados deste estudo sugerem que o tipo de equipamento rotatório utilizado em cirurgia bucomaxilofacial não interfere no reparo ósseo.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Osteotomy / Bone Regeneration / Dental Instruments / Mandible / Mandibular Injuries Type of study: Evaluation studies Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2007 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of São Paulo/BR / Sacred Heart University/BR

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Full text: Available Index: LILACS (Americas) Main subject: Osteotomy / Bone Regeneration / Dental Instruments / Mandible / Mandibular Injuries Type of study: Evaluation studies Limits: Animals Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2007 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of São Paulo/BR / Sacred Heart University/BR