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1.
Actual. osteol ; 13(1): 17-27, Ene - Abr. 2017. ilus
Article in English | LILACS | ID: biblio-1118656

ABSTRACT

Purpose: to compare the healing process of a defect of compact bone tissue after the implantation of osteoplastic materials based on ß-tricalcium phosphate ("ChronOS™" and "Calc-i-oss®"), which differ by manufacturer, geometrical shape and microscopic structure. Methods: the experiment was performed on 48 white male Wistar rats. In the middle third of the diaphysis of the femur we produced a perforated defect of 2.5 mm diameter in the medullary canal, which in the animals of the first group was filled with the osteoplastic material "ChronOS™" (block, Synthes, Switzerland), and in the animals of the second group with "Calc-i-oss®" (granules, «Degradable Solutions Dental¼, Switzerland). Fragments of the injured bones were studied on the 60th and 120th day by light microscopy with morphometry and by scanning electron microscopy. Results: it was found that regardless the geometric shape and the microscopic structure, both osteoplastic materials show high biocompatibility, osteoconductive properties, good integration with bone tissue of the regenerate, and that the microscopic structure of ß-tricalcium phosphate ("ChronOS™") may significantly affect the microscopic structure of bone tissue of the regenerate, which manifests itself in the specificity of its geometric shape. It was noticed that osteoplastic materials "ChronOS™" and "Calc-i-oss®" almost at the same rate were subjected to resorption and replacement by the bone tissue, the ratio of which was 22.55±1.25 to 77.45±1.25 and 25.72±2.06% to 74.28±2.06% on the 60th day of the experiment, and 17.65±1.09 to 82.35±1.09 and 18.31±1.54% to 81.69±1.54% on the 120th day. (AU)


Objetivo: Comparar el proceso de cicatrización de un defecto del tejido óseo compacto tras la implantación de materiales osteoplásticos a base de fosfato ß-tricálcico («ChronOS™¼ and «Calc-i-oss®¼) que difieren según el fabricante en la forma geométrica y estructura microscópica. El estudio fue realizado en 48 ratas Wistar machos en los cuales se produjo, en el tercio medio de la diáfisis del fémur, un defecto perforado de 2,5 mm de diámetro, el cual fue llenado con el material «ChronOS™¼ (block, Synthes, Switzerland) en un grupo y con «Calc-i-oss®¼ (granules, «Degradable Solutions Dental¼, Switzerland) en el segundo grupo. El sector del defecto fue evaluado en los días 60 y 120 por microscopía óptica y por microscopía electrónica de barrido. Resultados: independientemente de la forma geométrica y la estructura microscópica, ambos materiales osteoplásticos mostraron alta biocompatibilidad, propiedades osteoconductivas y buena integración con el tejido óseo regenerado. La estructura microscópica del fosfato ß-tricálcico («ChronOS™¼) puede afectar significativamente a la estructura microscópica del tejido óseo regenerado, que se manifiesta en su forma geométrica. Adicionalmente, se observó que ambos materiales osteoplásticos «ChronOS™¼ y «Calc-i-oss®¼ mostraron valores similares de resorción y reemplazo por tejido óseo, cuya relación al 60º día del experimento fue de 22,55±1,25 a 77,45±1,25 y 25,72±2,06% a 74,28±2,06%, y a los 120 días de 17,65±1,09 a 82,35±1,09 y de 18,31±1,54% a 81,69±1,54% respectivamente. (AU)


Subject(s)
Animals , Rats , Calcium Phosphates/therapeutic use , Bone Substitutes/therapeutic use , Femur/injuries , Osteogenesis , Prostheses and Implants , Biocompatible Materials , Bone Resorption , Materials Testing , Calcium Phosphates/chemistry , Rats, Wistar , Bone Substitutes/chemistry , Femur/surgery , Femur/pathology , Femur/ultrastructure , Ketamine/administration & dosage , Acepromazine/administration & dosage
2.
Actual. osteol ; 12(1): 21-26, 2016. ilus
Article in English | LILACS, UNISALUD, BINACIS | ID: biblio-1379744

ABSTRACT

Purpose: to study the healing process of a defect of the compact bone tissue after the implantation of osteoplastic material «easygraft CRYSTAL¼. Methods: the experiment was conducted on 24 Wistar rats. In the middle third of the diaphysis of the femur we created a perforated defect of 2.5 mm diameter in the medullary canal, which was filled with osteoplastic material «easy-graft CRYSTAL¼. Fragments of the injured bones were studied on the 60th and 120th days by light microscopy with morphometry and scanning electron microscopy. Results: it was found that in the area of the defect of the compact bone tissue «easy-graft CRYSTAL¼ shows high biocompatibility, osteoconductive properties and provides stability to the volume of the defect due to good integration with the bone tissue of regenerate and absence of signs of resorption of osteoplastic material throughout the period of experiment. (AU)


Objetivo: estudiar el proceso de reparación de un defecto del tejido óseo compacto después de la implantación de material osteoplástico (easy-graft CRYSTAL). Métodos: el experimento se realizó en 24 ratas Wistar. Se realizó en el tercio medio de la diáfisis del fémur un defecto de 2,5 mm de diámetro en el canal medular que se rellenó de material de osteoplástico (easy-graft CRYSTAL). Los huesos lesionados fueron estudiados en los días 60ª y 120ª mediante microscopía óptica y microscopía electrónica de barrido. Resultados: se encontró que en la zona del defecto del tejido óseo compacto el injerto mostró alta biocompatibilidad y propiedades osteoconductivas y proporcionó estabilidad al volumen del defecto debido a la buena integración con el tejido óseo y ausencia de signos de resorción de material osteoplástico durante todo el período experimental. (AU)


Subject(s)
Animals , Rats , Osteogenesis , Bone Regeneration/physiology , Diaphyses/abnormalities , Diaphyses/pathology , Bone Substitutes/therapeutic use , Femur/abnormalities , Bone Transplantation/methods , Rats, Wistar , Diaphyses/anatomy & histology , Diaphyses/cytology , Disease Models, Animal , Femur/pathology , Microscopy
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