Search results for "Radiograph"
showing 10 items of 830 documents
Proliferative response of cells of the dentogingival junction to mechanical stimulation
2001
SUMMARY The aim of this research was to study the proliferative response of junctional epithelium (JE) and gingival connective tissue (GCT) to mechanical stimulation in vivo with regard to the potential occurrence of apical migration of JE and loss of GCT attachment during orthodontic tooth movement. Elastic bands were inserted between the maxillary first and second molars of male rats aged 8 weeks, which were pulse-labelled with 3 H-thymidine and subsequently killed in groups, together with labelled control animals (a total of 98 rats) after periods of 1‐168 hours. Autoradiographs were prepared from plastic mesiodistal sections, and parameters of cell proliferation for JE and GCT of the pa…
Comparative Analysis of Peri-Implant Bone Loss in Extra-Short, Short, and Conventional Implants. A 3-Year Retrospective Study
2020
Objective: To evaluate the influence of implant length on marginal bone loss, comparing implants of 4 mm, 6 mm, and >
Modulatory effect of bolinaquinone, a marine sesquiterpenoid, on acute and chronic inflammatory processes
2002
The marine metabolite bolinaquinone is a novel inhibitor of secretory phospholipase A(2) (sPLA(2)), with a potency on the human synovial enzyme (group II) higher than that of manoalide. This activity on the sPLA(2) was confirmed in vivo in the 8-h zymosan rat air pouch on the secretory enzyme accumulation in the pouch exudate. Additionally, bolinaquinone decreased potently the synthesis and release of leukotriene B(4) (LTB(4)) in calcimycin (A23187)-stimulated human neutrophils as a consequence of the inhibition of 5-lipoxygenase activity, as well as PGE(2) and NO production on zymosan-stimulated mouse peritoneal macrophages. This compound exerted anti-inflammatory effects by topical and or…
Early evaluation using a radiomic signature of unresectable hepatic metastases to predict outcome in patients with colorectal cancer treated with FOL…
2020
PurposeThe objective of this study was to build and validate a radiomic signature to predict early a poor outcome using baseline and 2-month evaluation CT and to compare it to the RECIST1·1 and morphological criteria defined by changes in homogeneity and borders.MethodsThis study is an ancillary study from the PRODIGE-9 multicentre prospective study for which 491 patients with metastatic colorectal cancer (mCRC) treated by 5-fluorouracil, leucovorin and irinotecan (FOLFIRI) and bevacizumab had been analysed. In 230 patients, computed texture analysis was performed on the dominant liver lesion (DLL) at baseline and 2 months after chemotherapy. RECIST1·1 evaluation was performed at 6 months. …
Alveolar bone loss, platelet and glycosylated haemoglobin levels in 239 patients. A clinical study
2020
Background The relation between periodontal disease and systemic pathologies is still not widespread among general practitioners. The aim of our study is to evaluate whether or not periodontal radiological diagnosis can aid the detection of blood alterations associated with acquired systemic diseases. Material and Methods This is a cross sectional study. All of the participants underwent a panoramic radiograph and a complete blood test. Morphological bone loss was considered as positive in those patients who showed radiographically more than 1 tooth with bone loss greater than or equal to the middle third of the root. The statistical analysis was performed by comparing the variables using t…
Ameloblastic fibro-odontoma: a case report.
2009
Made available in DSpace on 2013-08-12T17:53:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-01 Made available in DSpace on 2013-08-12T17:53:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-01 Made available in DSpace on 2013-08-12T17:53:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-01 Made available in DSpace on 2013-09-30T18:34:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-01 Made available in DSpace on 2013-08-12T17:53:48Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-01 Made available in DSpace on 2013-09-30T18:34:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-12-01 Made available in DSpace on 2013-09-30T18:34:…
Brain Edema and Intracerebral Necrosis Caused by Transcranial Low-Frequency 20-kHz Ultrasound
2006
Background and Purpose— Ultrasound-accelerated thrombolysis is a promising approach toward acute stroke treatment. In previous in vitro studies, we demonstrated enhanced thrombus destruction induced by 20-kHz ultrasound. However, little is known about biological interactions of low-frequency ultrasound with brain tissue. The aim of this in vivo MRI study was to assess safety aspects of transcranial low-frequency ultrasound in rats. Methods— The cranium of 33 male Wistar rats was sonificated for 20 minutes (20-kHz continuous wave). Power output was varied between 0 and 2.6 W/cm 2 . Tympanal and rectal temperature was monitored. Diffusion-weighted imaging and T2-weighted imaging was performe…
Burkitt's lymphoma : a child s case presenting in the maxilla. Clinical and radiological aspects.
2006
Burkitt´s lymphoma (BL) is a neoplasm which, despite its very aggressive behaviour is potentially curable. It typically affects the paediatric population. BL belongs to the non-Hodgkin lymphomas group, and is the first human tumour undoubtedly related to a viral origin (Epstein-Barr virus). Two main clinical subtypes are recognized: endemic or African type, and sporadic type; HIV associated BL constitutes a third type. Although common in endemic BL, maxillary involvement is rare in sporadic cases. This, together with the clinical lack of specificity associated to this location, makes diagnosis difficult. New chemotherapeutic protocols achieve a high survival rate. Most important prognostic …
Time-course of GDNF and its receptor expression after brain injury in the rat
2008
Abstract The aim of the present work was to perform, by in situ hybridization, a time-course analysis of the glial cell line-derived neurotrophic factor (GDNF) and its receptor mRNA expression in two models of brain injury in the rat: (a) excitotoxic lesion by ibotenic acid injection in the hippocampal formation; (b) mechanical lesion by needle insertion through the cerebral cortex including the white matter of the corpus callosum. The time-course analysis, ranging from 6 h to 8 days, showed that the GDNF and its receptor (RET, GFRα-1 and GFRα-2) mRNA expressions were differentially up-regulated in both models of lesion. This in vivo regulation of the GDNF and its receptor mRNA expression i…
Solitary intraosseous neurofibroma of the mandible. Apropos of a case
2010
Neurofibroma is a benign neoplasm derived from peripheral nerves. Most of these are associated with Neurofibromatosis but may also occur as solitary lesions. When found on the head and neck they are generally located in the soft tissue. Intraosseous location is very rare. The following report describes a case of an intraosseous neurofibroma located in the left mandibular ramus of a 14-year-old child. The patient did not had clinical evidence of the lesion and it was found on a routine radiographic examination. Surgical excision of the lesion was scheduled and the sample was submitted to histopathological study. Representative sample cuts were studied using conventional techniques of hematox…