Nelson Lobos

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Ameloblastin and amelogenin are structural proteins present in the enamel matrix of developing teeth. Here we report the results of in situ hybridization analyses with DNA probes of ameloblastin and amelogenin expression in the mandibular first molars of ICR/Jcl mice from postnatal day 1 to day 15. Ameloblastin mRNA expression was observed in ameloblasts at(More)
The objective of this study was to describe the main clinical characteristics and the relative frequency of each type of oral malignancies received at the Oral Pathology Reference Institute (IREPO) of the Faculty of Odontology; University of Chile, since 1975 to 2006. Studies were performed of 728 cases of biopsies recorded in the IREPO data base with a(More)
BACKGROUND Infantile hemangiomas (IHs) are the most common vascular tumors in childhood. Diagnosis of IHs is usually clinical, however, to determine the actual dimensions of the lesion or the anatomic changes that occur during its evolution and treatment, a color Doppler ultrasound (CDU) examination can be performed. To date, there are few publications that(More)
Human papillomavirus (HPV) is the causal agent of cervical, anogenital and a subset of oropharyngeal carcinomas. In addition, the role of HPV in oral carcinogenesis has been suggested, although the findings are inconclusive. In this study, using conventional polymerase chain reaction (PCR) and genotyping by specific PCR and DNA sequencing, we analyzed the(More)
The simple bone cyst, as newly classified by WHO in 2005, is a lesion related to the jawbones. Therefore, it is not a cyst, since it is a cavity devoid of epithelial tissue. It is a rare pathology affecting the mandible more than the maxilla. Its onset occurs mainly during the first two decades of life, irrespective of sex. The purpose of our report is to(More)
A case of metastatic neoplasm developing in the gingiva from a primary lesion, probably sited in the gastric mucosa, has been reported. In this case, the first demonstrable metastatic lesion was located in the gingiva. The dentist has a great responsibility in detecting malignancy in the oral cavity because of his opportunities during routine examinations.
Active bleeding in plexiform neurofibromatosis can be a life-threatening complication in neurofibromatosis type 1 (NF1). The prompt imaging support of 2D-3D ultrasound (US) and computed tomography (CT) during the active hemorrhage phase of cutaneous neurofibromas has not been previously reported. We report a case with NF1 who experienced a sudden swelling(More)
To establish the normal dental development pattern of the ICR/Jcl strain of mouse, we analyzed a significant number of observations of the different developmental stages of the first mandibular molar, accurately recording the chronology of their daily embryonic development. Proliferation of the dental sheet began at day 12.5 in utero (E-12.5), the bud stage(More)
BACKGROUND The assessment of activity in keloids may be critical for defining their management. There is a lack of clinical scorings designed for the evaluation of keloids and biopsies may be contraindicated. OBJECTIVE To assess the sonographic activity of keloids in comparison with clinical scoring. MATERIALS AND METHODS A retrospective study of the(More)
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