Comparative study of bone repair in mandibular body osteotomy between metallic and absorbable 2.0 mm internal fixation systems. Histological and histometric analysis in dogs: a pilot study

Autor(es)

Sverzut, C. E. ^[1] ; Kato, R. B. ^[1] ; Rosa, A. L. ^[1] ; Trivellato, A. E. ^[1] ; Sverzut, A. T. ^[1] ; da Silveira, K. M. ^[1] ; de Oliveira, P. T. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Oral & Maxillofacial Surg & Periodontol, BR-14040904 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Morphol Stomatol & Physiol, BR-14040904 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Oral and Maxillofacial Surgery; v. 41, n. 11, p. 1361-1368, NOV 2012.
• Citações Web of Science: 4

Resumo

The objective of this study was to compare the bone repair along a mandibular body osteotomy stabilized with 2.0 mm absorbable and metallic systems. 12 male, adult mongrel dogs were divided into two groups (metallic and absorbable) and subjected to unilateral osteotomy between the mandibular third and fourth premolars, which was stabilized by applying two 4-hole plates. At 2 and 18 weeks, three dogs from each group were killed and the osteotomy sites were removed and divided equally into three parts: the upper part was labelled the tension third (TT), the lower part the compression third (CT), and the part between the TT and CT the intermediary third (IT). Regardless of the treatment system, union between the fragments was observed at 18 weeks and the CT showed more advanced stages of bone repair than the TT. Histometric analysis did not reveal any significant differences among the 3 parts or systems in the distance between bone fragments at 2 weeks. Although at 18 weeks the proportions of newly formed bone did not differ among TT, IT and CT, significantly enhanced bone formation was observed in all sections for the metallic group. The patterns of repair were distinct between treatments. (AU)

• Processo FAPESP: 07/00892-8 - Análise histológica e histomorfométrica da interface entre tecido ósseo e parafusos metálicos e absorvíveis do sistema 2,0 mm: estudo em cães utilizando fixação interna rígida
• Beneficiário: Cassio Edvard Sverzut
• Modalidade de apoio: Auxílio à Pesquisa - Regular