Abstract
Veterinaria México OA ISSN: 2448-6760Cite this as:Lomelí Mejía PA, González Lomelín PA, Lecona Butrón H, Domínguez-Rubio R, León-Hernández SR, Luna-Valdéz IX, Domínguez-Hernández V. Quantitative evaluation of osteogenesis through infrared light. Pilot study. Veterinaria México OA. 2017;4(2). doi: 10.21753/vmoa.4.2.410.Different methods are available to evaluate the degree of bone healing. A good choice involves employing optical techniques with infrared light to eval-uate the progress of bone consolidation. Because infrared light is absorbed in liquids and reflected in solids, it is possible to assess bone consolidation progress using an incident light source and a coupled photo sensor. We used a 940-nm light source that is capable of reaching bone to determine the degree of bone consolidation. Five New Zealand White rabbits were used according to the NOM-062-ZOO99 standard. In each animal, a fracture was generated in the left tibia, and the fragments were fixed using an external fixator constructed with Kirschner nails and dental acrylic cement. Progress in bone consolidation was evaluated at days 7, 23, and 34 after surgery. A linear dependence was observed between the days elapsed and the reflection of the infrared light.Figure 2. Reduction of tibia by external fixators made with Kirschner nails 0.045 inch in diameter and methylmethacrylate cement.
Highlights
Different methods are available to evaluate the degree of bone healing that are as simple as the transmission of complex sound waves or as complex as bone densitometry and computed tomography
Of note, the correlation coefficient decreased for the last measurement on day 34 after surgery in rabbit 5 at 73 %, which is in contrast to the minimum expected consolidation of 91.5 %
X-rays do not indicate the progression of bone healing over time because the energy of X-rays can pass through the bone bridges that formed initially
Summary
Different methods are available to evaluate the degree of bone healing that are as simple as the transmission of complex sound waves (ultrasound) or as complex as bone densitometry and computed tomography. Since the discovery of X-rays in 1895, it is possible to offer a diagnosis and treat bone fractures with scientific rigor Another development that contributed to the field of orthopaedic trauma was computed tomography, which was invented in 1972. It is possible to know the shape of a fracture line and its location, but it does have a problem when determining bone quality For this purpose, bone densitometers were designed to assess the bone density gradients in the same bone by using laser light scanning. Bone densitometers were designed to assess the bone density gradients in the same bone by using laser light scanning For this procedure, it is necessary to know the optical parameters of the tissues to be studied and to have mathematical software that allow the behaviour of a tissue to be modelled,[9] or an assembly of tissues to obtain the desired graphic or image response. Only one tissue could be analysed by the incidence and transmission of a beam of monochromatic light
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