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        "resumen" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">De los 111 casos de fracturas del axis atendidos en nuestro servicio desde 1988 a 1998&#44; 58 presentaban fracturas de la ap&#243;fisis odontoides&#46; De &#233;stos&#44; 51 pacientes fueron intervenidos quir&#250;rgicamente mediante la t&#233;cnica del atornillado anterior&#46; En este grupo&#44; hemos conseguido demostrar radiol&#243;gicamente la existencia de una buena consolidaci&#243;n &#243;sea en 48 pacientes &#40;92&#46;3&#37;&#41;&#46; De todos los casos&#44; en 38 se demuestra una buena alineaci&#243;n &#40;73&#37;&#41; y en 14 &#40;26&#46;9&#37;&#41; alg&#250;n grado de desalineaci&#243;n de la consolidaci&#243;n &#243;sea&#46; Las edades del grupo fueron de los 13 a&#241;os de edad del m&#225;s joven&#44; hasta los 86 del de mayor edad&#46; Hemos observado en la serie gran disparidad de desplazamientos de la odontoides al ingreso en el hospital&#46; S&#243;lo 15 pacientes &#40;25&#46;8&#37;&#41; no ten&#237;an fracturas desplazadas a su ingreso&#46; Los restantes 43 casos presentaban diversos grados de desplazamientos anterior &#40;27&#46;5&#37;&#41; o posterior &#40;46&#46;5&#37;&#41;&#46; En diez casos se ha presentado alg&#250;n tipo de complicaci&#243;n &#40;19&#46;2&#37;&#41;&#44; Yno hemos observado mortalidad directa respecto al procedimiento&#46;</p><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">A partir de los resultados analizados de los casos&#44; la mayor&#237;a con controles superiores a los tres a&#241;os del procedimiento&#44; concluimos que ninguno de los factores que habitualmente se citan como determinantes en la decisi&#243;n de la elecci&#243;n de la t&#233;cnica quir&#250;rgica apropiada para el tratamiento de este tipo de fracturas &#40;edad&#44; direcci&#243;n y grado de desplazamiento&#44; fracturas asociadas&#44; clasificaci&#243;n de las fracturas&#44; o estado neurol&#243;gico&#41; ha sido un obst&#225;culo ni t&#233;cnico ni funcional para obtener una correcta consolidaci&#243;n de la fractura&#46; A partir de los datos obtenidos creemos que los &#250;nicos factores que contraindican el atornillado anterior en todos los casos de fracturas de la odontoides&#44; son el trazo de la fractura y la ruptura del ligamento transverso del atlas&#46; A nuestro entender no existen fracturas estables de la base de la odontoides&#46; Unicamente la localizaci&#243;n de la fractura ha condicionado la actitud terap&#233;utica en nuestra serie&#46; Consecuentemente se propone que la clasificaci&#243;n de las fracturas de la ap&#243;fisis odontoides se limite a las del &#225;pex y de la base&#46; Las primeras pueden ser tratadas conservadoramente&#46; Las segundas&#44; siempre inestables&#44; deben ser tratadas mediante su atornillado anterior como primera opci&#243;n terap&#233;utica&#46;</p>"
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        "resumen" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">From the 111 cases of fractures of the Axis treated in our service from 1989 to 1998&#44; 58 presented with Odontoid fractures&#46; In this group of patients&#44; 51 cases underwent an anterior screw placement of the Odontoid&#46; We have been able to demonstrate a good osseous consolidation after the anterior screw placement in 48 cases &#40;92&#46;3&#37;&#41;&#46; From these cases&#44; in 38 &#40;73&#37;&#41; a good alineation is demonstrated and in 14 &#40;26&#46;9&#37;&#41; sorne degree of distorsion is seen with respect to the original position&#46; In the group&#44; the youngest patient was 13 year-old and the older was 86 year-old&#46; On admission&#44; we have observed a great variety of different displacements of the fractured odontoids while only 15 patients &#40;25&#46;8&#37;&#41; had lined-up fractures&#46; The 43 remaining cases presented different degrees of anterior displacement &#40;27&#46;5&#37;&#41; or posterior &#40;46&#46;5&#37;&#41;&#46; There were surgical complications or functional impairment of the segment in 9 cases &#40;17&#46;3&#37;&#41; in controls&#44; and we have not observed direct mortality with respect to the procedure yet a patient died lately in the same hospitalization from other causes&#46;</p><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">From the results here analyzed of the 45 patients with at least a 3-year controls from the procedure&#44; we conclude that none of the factors habitually reported as determinant in the decision about which is the most suitable surgical technique for the treatment of the odontoid fractures &#40;age&#44; direction and degree of displacement&#44; type of fracture according to Anderson and d&#8217;Alonzo&#41;&#44; has been a technical or functional obstacle to obtain an adequate consolidation of the fracture&#46;</p><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">From these data&#44; we believe that only the oblique fractures and those with an associated rupture of the transverse ligament of the axis&#44; are the single contraindications of anterior screw placement&#46; In our opinion stable fractures of the base of the odontoid do not existo Only the localization of the fracture has condicioned our therapeutical decisions in our series&#46; Consequently we propose that the classification of odontoid fractures remains limited to the apex fractures and fractures of the base&#46; The apex former can be treated by conservative means but the last&#44; always unstable&#44; must be treated by anterior screwing as the first therapeutical choice&#46;</p>"
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        "nota" => "<p class="elsevierStyleNotepara">Mart&#237;n-Ferrer&#44; S&#46;&#59; Rimbau&#44; J&#46;&#59; Joly&#44; M&#46;C&#46;&#59; Teruel&#44; J&#46;&#59; Pont&#44; J&#46;&#58; Fracturas de la ap&#243;fisis odontoides&#58; revisi&#243;n de nuestra casu&#237;stica&#44; implicaciones terap&#233;uticas y nueva clasificaci&#243;n&#46; Neurocirug&#237;a 1999&#59; 10&#58; 426&#8211;438&#46;</p>"
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Fracturas de la apófisis odontoides: Revisión de nuestra casuística, implicaciones terapéuticas y nueva clasificación
Odontoid fractures. A review and new classification
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* Servicios de Radiología. Hospital Universitario “Dr. J. Trueta”. Girona

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