title: Measurement of mechanical properties with respect to gap healing in a rabbit osteotomy model using echo tracking.
abstract: The most important issue in the assessment of fracture healing is to acquire information about the restoration of the mechanical integrity of bone. Echo tracking (ET) can noninvasively measure the displacement of a certain point on the bone surface under a load. Echo tracking has been used to assess the bone deformation angle of the fracture healing site. Although this method can be used to evaluate bending stiffness, previous studies have not validated the accuracy of bending stiffness. The purpose of the present study is to ensure the accuracy of bending stiffness as measured by ET. A four-point bending test of the gap-healing model in rabbit tibiae was performed to measure bending stiffness. Echo tracking probes were used to measure stiffness, and the results were compared with results of stiffness measurements performed using laser displacement gauges. The relationship between the stiffness measured by these two devices was completely linear, indicating that the ET method could precisely measure bone stiffness.
authors.affiliation: Department of Orthopaedic Surgery, Faculty of Medicine, University of Tokyo, Tokyo, Japan. tobitak.ort@gmail.com
authors.forename: Kenji
authors.initials: K
authors.lastname: Tobita
authors.forename: Isao
authors.initials: I
authors.lastname: Ohnishi
authors.forename: Juntaro
authors.initials: J
authors.lastname: Matsuyama
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Sakai
authors.forename: Satoru
authors.initials: S
authors.lastname: Ohashi
authors.forename: Koji
authors.initials: K
authors.lastname: Ogawa
authors.forename: Eiichi
authors.initials: E
authors.lastname: Minagawa
authors.forename: Koichi
authors.initials: K
authors.lastname: Miyasaka
authors.forename: Kozo
authors.initials: K
authors.lastname: Nakamura
mesh_terms: D000465:Algorithms; D000818:Animals; D003198:Computer Simulation; D055119:Elastic Modulus; D054459:Elasticity Imaging Techniques / Q000379:methods*; D017102:Fracture Healing / Q000502:physiology*; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D008954:Models, Biological; D010027:Osteotomy; D011817:Rabbits; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013718:Tensile Strength; D013977:Tibia / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D013978:Tibial Fractures / Q000000981:diagnostic imaging* / Q000503:physiopathology*