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Browsing by Subject "Bisphosphonates"

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    An experimental study of bisphosphonate-induced jaws osteonecrosis in Sprague–Dawley rats
    (Wiley, 2010-10-01) López Jornet, María Pía; Camacho Alonso, Fabio; Molina Miñano, Francisco; Gómez García, Francisco; Vicente Ortega, Vicente; Dermatología, Estomatología, Radiología y Medicina Física
    Objective: Patients undergoing treatment with bisphosphonates may develop jaw lesions consisting mainly of bone necrosis. The present study describes a model of maxillary osteonecrosis in Sprague–Dawley rats, applying bisphosphonates and examines the changes occurring after tooth extraction. Material and methods: A total 200 animals were included in a randomized prospective study involving the following groups: group I (control, 20 rats without drug treatment), group II (60 animals administered dexamethasone 1 mg/kg/day for 7, 14 and 21 days, in subgroups of 20 animals each), group III (60 animals administered pamidronate daily at a dose of 3 mg/kg) and group IV (60 animals administered pamidronate and dexamethasone). In all groups, molar extraction was carried out on the right upper maxillary or mandibular side 8, 15 and 22 days after the start of dosing. The rats were killed 14 and 28 days after extraction in all groups. Results: A total of 18 cases of osteonecrosis were recorded in the group administered pamidronate and dexamethasone. Osteonecrosis affected the upper maxilla in 10 cases and the mandible in eight cases, and was circumscribed to the extraction zone in all cases. Osteonecrosis was not seen in any of the other groups. Conclusions: The administration of pamidronate and dexamethasone in rats subjected to molar extraction increases the risk of osteonecrosis.
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    The development of bone changes induced in rats by recombinant human granulocyte colonystimulating factor is suppressed by bisphosphonate
    (Murcia : F. Hernández, 1999) Suzuki, M.; Adachi, K.; Sugimoto, T.; Nakayama, Hiroyuki; Doi, K.
    We have previously demonstrated that high doses of recombinant human granulocyte colonystimulating factor (rhG-CSF) induce bone changes characterized by osteoclastic bone resorption and osteogenesis due to intramembranous ossification in rats. In this communication we examined the effects of a pretreatment with 3-amino-l-hydroxypropylidene-1,lbisphosphonate (AHPrBP), which is a powerful inhibitor of osteoclastic bone resorption, on bone changes induced by rhG-CSF in order to investigate the relation between osteoclastic bone resorption and osteogenesis. AHPrBP (5 mg/kg/day) was subcutaneously given to 6-week-old rats for 2 days. From the following day of the final injection of AHPrBP, rats received a subcutaneous injection of rhG-CSF (1,000 pg/kg/day) for 14 days, and the femur and tibia were evaluated histopathologically. By the analysis of peripheral blood leukocyte counts, spleen weights and bone marrow findings, the pretreatment with AHPrBP had no effect on the activation of hematopoiesis related to the major pharmacological activity of rhG-CSF. In the rats treated with rhG-CSF alone, accelerated osteoclastic bone resorption and osteogenesis due to intramernbranous ossification were observed in the trabeculae of metaphyseal spongiosa. The accelerated osteoclastic bone resorption induced by rhG-CSF was suppressed by the pharmacological activity of AHPrBP. Furthermore, the osteogenesis induced by rhG-CSF was also suppressed by AHPrBP. These results suggest that the osteogenesis induced by rhG-CSF is a sequential reaction of accelerated osteoclastic bone resorption, and moreover that the main action of rhG-CSF on bone is an acceleration of osteoclastic bone resorption.
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    Trastornos musculoesqueléticos y bifosfonatos: un análisis de desproporcionalidad en la base de datos española de farmacovigilancia
    (Arán Ediciones, 2025-01-15) Yuste Pérez, María Teresa; Escudero Pastor, Elisa; Marín Carrillo, Pedro; Farmacología
    Introducción: diversos efectos adversos musculoesqueléticos asociados al uso de bifosfonatos han sido identificados, aunque se desconocen su frecuencia, gravedad y factores de riesgo. El objetivo de nuestro estudio es determinar la posible relación causal entre los bifosfonatos más utilizados en España y la aparición de efectos adversos musculoesqueléticos. Material y métodos: se realizó un estudio retrospectivo, observacional, analítico, de casos/no casos, utilizando la base de datos del Sistema Español de Farmacovigilancia. Los bifosfonatos seleccionados fueron ácido alendrónico, ácido ibandrónico y ácido risedrónico. Las reacciones adversas estudiadas según la terminología MedDRA fueron el SOC trastornos musculoesqueléticos y del tejido conjuntivo y los PT mialgia, artralgia, dolor óseo, parestesia, dolor musculoesquelético, rigidez musculoesquelética, artritis, debilidad muscular y dolor en una extremidad. Resultados: los valores de ROR obtenidos para el SOC fueron superiores a la unidad para los tres fármacos estudiados. Estas reacciones se dan sobre todo en mayores de 65 años, mujeres y la mayoría de ellas se clasifican como graves. Para las 9 PT estudiadas (mialgia, artralgia, dolor óseo, parestesia, dolor musculoesquelético, rigidez musculoesquelética, artritis, debilidad muscular y dolor en una extremidad), se encontraron valores de ROR superiores a la unidad para los tres fármacos, excepto para las PT parestesia y PT dolor en una extremidad. Conclusión: se han detectado reacciones adversas musculoesqueléticas no recogidas en las fichas técnicas. La información aportada por este trabajo podría recomendar una reevaluación y actualización de la relación beneficio-riesgo de estos fármacos.
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    Treatment of stage 2 medication-induced osteonecrosis of the jaw: a case series
    (MDPI, 2021-01-24) Pardo-Zamora, Guillermo; Martínez, Yanet; Moreno, José Antonio; Ortiz Ruiz, Antonio José; Dermatología, Estomatología, Radiología y Medicina Física
    Medication-induced jaw osteonecrosis (MRONJ) is a rare and serious disease with a negative impact on patients’ quality of life, whose exact cause remains unclear and which may have a multifactorial origin. Although there are different therapeutic protocols, there is still no consensus. This case series evaluated three patients diagnosed with staged 2 MRONJ treated at the University of Murcia dental clinic according to the protocols described by the Spanish Society of Oral and Maxillofacial Surgery and the American Association of Oral and Maxillofacial Surgeons. Within 12 months of the application of therapeutic protocols, the lesions were completely healed in all cases. Radiography showed slow but progressive healing with normal bone structure. Conservative treatment with antibiotics, chlorhexidine rinses and minimally invasive surgical intervention with necrotic bone resection is effective in treating stage 2 of MRONJ. In cases of refractory osteonecrosis, the application of platelet and leukocyte-rich fibrin (PRF-L) in the surgical approach improves the outcome in soft tissue healing and bone regeneration but further research is needed to confirm its effectiveness.
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    Uso del ácido Zoledrónico en el tratamiento del Mieloma Múltiple
    (Murcia: Servicio de publicaciones de la Universidad de Murcia, 2013) Hernández Cano, Rosa Mª; Lorenzo Hernández, Mª Piedad; Soria Suárez, Mª Isabel
    El objetivo principal del estudio del caso clínico fue determinar si el uso de los bifosfonatos en el tratamiento del Mieloma Múltiple es efectivo para conseguir disminución del dolor en el paciente y para valorar la disminución de hipercalcemia. Para ello se ha estudiado un caso clínico de una paciente sometida a tratamiento de quimioterapia y coadyuvado con tratamiento con Zometa en el Hospital Comarcal de Baza (Granada), durante las primeras sesiones del tratamiento, obteniéndose resultados favorables ya que se evidenció disminución en la incidencia de hipercalcemia y reducción del dolor. Tras una exhaustiva valoración del paciente, se seleccionaron 3 diagnósticos de enfermería, y se planificaron las intervenciones más apropiadas para cada uno de ellos, utilizando la taxonomía NANDA, NIC y NOC. Durante el tratamiento de la paciente se observaron variaciones en la temperatura corporal poco significativas y náuseas en las primeras sesiones; así como disminución del dolor que conllevó a un menor uso de analgésicos, normalización de cifras de calcio sérico y un aumento en su calidad de vida. Las conclusiones del estudio determinaron un efecto positivo en la administración del Ácido Zoledrónico, ya que se obtuvieron los resultados previstos y los efectos secundarios fueron mínimos, sin necesidad de interrumpir el tratamiento.

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