INFLUENCE OF THE OSTEOSYNTHESIS PLATE ON ULTRASOUND PROPAGATION IN THE BONE

Author(s)

Bezuti, Marcio Takey ^[1] ; Mandarano-Filho, Luiz Garcia ^[1] ; Barbieri, Giuliano ^[1] ; Mazzer, Nilton ^[1] ; Barbieri, Claudio Henrique ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Med Ribeirao Preto, BR-14049900 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Acta Ortopédica Brasileira; v. 22, n. 5, p. 269-274, SEP-OCT 2014.
• Web of Science Citations: 1

Abstract

Objective: To analyze the influence of steel plates for osteosynthesis on the velocity of ultrasound propagation (VU) through the bone. Methods: The transverse coronal and sagittal velocity of ultrasound propagation underwater were measured on the intact bone and then on assemblies of the same bone with two types of osteosynthesis plates (DCP and semi tubular), fixed onto the dorsal side of the bones. The first arriving signal (FAS) was the ultrasound parameter used, taking the coronal and sagittal diameters as the distances to calculate velocity. Intergroup statistical comparisons were made at significance level of 1% (p<0.01). Results: Velocity was higher on the intact bones than on the bone-plate assemblies and higher for the semitubular than for the compression plates, although differences were not statistically significant for most comparisons (p=0.0132 to 0.9884), indicating that the steel plates do not interfere significantly with ultrasound wave propagation through the bone-plate assemblies. Conclusion: The velocity reduction effect was attributed to the greater reflection coefficient of the steel as compared to that of bone and water. Ultrasonometry can, thus, be used in the evaluation of healing of fractures fixed with steel plates. (AU)

• FAPESP's process: 07/56422-0 - Ultrasonometric evaluation of bone healing and cortical bone density
• Grantee: Claudio Henrique Barbieri
• Support Opportunities: Research Projects - Thematic Grants