Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Drawing on a translation of Aldus Manutius’s preliminaries to his Scriptores astronomici veteres this article studies several of its editorial features as well as the nature and importance of the manuscript sources from which its texts derive.

A survey of the lids of some apothecary jars (albarelli) in the Museum of Hispanic Pharmacy at the Complutense University of Madrid reveals that they were made from printers’ waste. We study the provenance of this waste, speculating that it may have come from the old library of Madrid’s Colegio de San Fernando.

Facial symmetry refers to a complete coincidence of each facial component on the sagittal plane, while asymmetry refers to the bilateral difference between these components. The presence of perfect bilateral symmetry is almost never present in human, so it is more common for individuals to predominate facial asymmetry. However, ocassionally, significant facial asymmetry results not only in functional but also in aesthetic problems. This research seeks to determine the alternatives, diagnosis and ideal treatment plan for the correction of each type of facial asymmetry through orthognathic surgery. For this purpose, a review of articles published between 2015 to date was carried out. Selecting those that were focused on describing or evaluating facial and dentofacial symmetry and asymmetry, type of diagnosis or treatment plan, including clinical cases. The Google search engine, SciELO and databases of medical interest, such as PubMed, PMC and Medigraphic were used. According to the research and treatments carried out during the last few years in the dental clinic, it has been proven that orthognathic treatment accompanied by previous planning is the best option for the management of skeletal facial asymmetries.

Objective: Determine the effectiveness of the piezoelectric handpiece vs. the straight handpiece at low speed in surgeries of impacted lower third molars, in relation to post-surgical effects (edema, pain and trismus) and the operative time of the osteotomy, in patients attending the Maxillofacial Surgery Service of the “Hospital de Especialidades Fuerzas Armadas N°1”. Method: It is an observational, longitudinal prospective cohort clinical study. A sample of 40 patients of both sexes aged between 18 and 25 years was taken, divided into two groups of 20 patients each, in group A extractions were performed with piezoelectric and in group B with straight rotary handpiece at low velocity. The results were analyzed on the third, fifth and eighth day, the edema was measured with the method of Amin and Laskin, for the pain the Visual Analogous Scale (VAS) was used, and for the presence of trismus with the instrument foot of king.  Results: In group A, edema (11.72 mm), pain (4.67) and mouth opening (39.49 mm) were lower than in group B edema (12.29 mm), pain (4.8) and mouth opening (35.83 mm) and osteotomy time was significantly longer with piezoelectric (6.54 ± 3.05 min) compared to the straight handpiece (1.55 ± 0.57 mm). min) and there was a difference in edema, pain and trismus under normal conditions in contrast to what was obtained at 3, 5, 8 days between the two instruments. Conclusion: the post-surgical effects of edema, pain and trismus of the extraction of retained lower third molars are less intense with the piezoelectric compared to the straight handpiece, the use of the piezoelectric being recommended.

Objective: To compare the space of the pharyngeal airway (nasopharynx and oropharynx) through lateral X-ray analysis in skeletal class II individuals with a control group composed of skeletal class I individuals. Materials and methods: This study was of the observational, descriptive, transversal, and prospective type. The sample was made up by 60 lateral head radiographs distributed between 30 class I (ANB 2°±2° and class I malocclusion) and 30 skeletal class II radiographs (ANB>5° and malocclusion class II-1). Measurements of the airway space in the oropharynx and nasopharynx were taken in mm through the McNamara method on lateral head radiographs. Results: The average space found in the oropharynx in class I was 11.71mm ± 3.18mm. In the class II group, it was 10.73mm ± 2.36mm. No significant differences were found (p=0.18). The average space found in the nasopharynx in the class I group was 18.45mm ± 4.11mm. In the class II group, it was 19.10mm ± 3.89mm. There were no significant differences found (p=0.53). Conclusion: The airway space in mm. of the nasopharynx presents similar values in millimeters in subjects with Class I and Class II skeletal malocclusion. There is no difference in the airway spaces of the oropharynx in subjects with Class I and Class II Malocclusions.

Root fractures are after caries and periodontal disease, the third cause of loss of dental units, being very common in posterior and endodontically treated teeth. The symptoms they produce are ambiguous and their diagnosis depends on the combination of multiple clinical and imaging factors. Among the diagnostic studies available to establish the origin of the symptoms is the cone beam computed tomography (CBCT). The objective of this case report is to describe the strategies used in the acquisition and interpretation of the CBCT in three patients with suspected root fractures. The use of a reduced field of view, with a voxel of 0.150 mm or less, accompanied by dynamic volume exploration made it possible to detect bone defects as an indirect sign for locating root fracture lines.

La presente editorial brinda una reseña histórica respecto de la asociación gremial como uno de los elementos más relevantes de la práctica odontológica moderna y fundamenta la importancia de los colegios odontológicos contemporáneos en el desarrollo y el avance de la profesión dental. El término gremio se define como un conjunto de personas que tienen el mismo oficio o profesión, y que se asocian para ordenarlo, defenderlo y compartir experiencias. Este vocablo involucra a la totalidad de individuos que trabajan en una misma rama profesional, lo cual contrasta con el concepto de sindicato, que implica una reunión voluntaria de un grupo de estos.

The rehabilitation of areas of the maxilla and mandible with extreme resorption is a fact of increased presence in our dental practice. Surgical techniques such as short and extra-short implants facilitate the resolution of these clinical cases. In this clinical case report we develop a case rehabilitated using a 5.5 mm long implant and we provide a biomechanical study of the behaviour of implants with these characteristics.

Ángel Gallardo (1867-1934) was President of the Sociedad Científica Argentina (1895-1896), director of the Anales of the SCA in various periods, Director of the Museo de Historia de la Ciudad de Buenos Aires (1897-1916), and President of the Academia Nacional de Ciencias Exactas, Físicas y Naturales (1927-1934). These are just a few of the many important positions he held throughout his life. Initially trained as a Civil Engineer, his interest in Natural Sciences was almost parallel to his career in Engineering, which led him to occupy the chair of Botany and then that of Zoology at the Facultad de Ciencias Exactas, Físicas y Naturales de la Universidad de Buenos Aires. In this last Faculty, in 1902 he received the title of Doctor of Natural Sciences. His thesis, entitled “Interpretación dinámica de la división celular”, presented a new way of interpreting mitosis or karyokinesis, based on the interpretation of cells as entities capable of experiencing electromagnetic forces. Even though this conception is now outdated, at the time it received wide recognition and constituted a significant advance for the interpretation of cariokinetic phenomena. This work is dedicated to describing and contextualizing this theory, valuable both from the historical point of view and from the new visions regarding cellular behavior.