Papers by Iván Suazo Galdames
En este libro ofrecemos una descripción de la neuroanatomía humana, coherente con los contenidos ... more En este libro ofrecemos una descripción de la neuroanatomía humana, coherente con los contenidos propios de un curso en esta materia, dirigido a estudiantes de ciencias de la salud y medio de consulta a profesionales del área. Por ello contribuye como una herramienta útil, orientadora y didáctica para el aprendizaje del estudiante, y no pretende mostrar el conocimiento neuroanatómico humano disponible de manera exhaustiva.
International journal of clinical and experimental pathology, 2013
Poly(lactic-co-glycolic acid) (PLGA) microparticles are used in various disorders for the control... more Poly(lactic-co-glycolic acid) (PLGA) microparticles are used in various disorders for the controlled or sustained release of drugs, with the management of salivary gland pathologies possible using this technology. There is no record of the response to such microparticles in the glandular parenchyma. The purpose of this study was to assess the morphological changes in the parotid gland when injected with a single dose of PLGA microparticles. We used 12 adult female Sprague Dawley rats (Rattus norvegicus) that were injected into their right parotid gland with sterile vehicle solution (G1, n=4), 0.5 mg PLGA microparticles (G2, n=4), and 0.75 mg PLGA microparticles (G3, n=4); the microparticles were dissolved in a sterile vehicle solution. The intercalar and striated ducts lumen, the thickness of the acini and the histology aspect in terms of the parenchyma organization, cell morphology of acini and duct system, the presence of polymeric residues, and inflammatory response were determin...
International journal of odontostomatology, 2012
The study objective was to evaluate the prevalence of referred dental pain (RDP) in a group of Br... more The study objective was to evaluate the prevalence of referred dental pain (RDP) in a group of Brazilians subjects and identify possible partnerships with sex, age and the presence of periodontal or periapical lesions. A descriptive cross-sectional study was designed, 98 patients between 14 and 64 years old (59 women and 39 men), who consulted by dental pain were evaluated clinically and radiographically in order to determine the cause and partnership with periapical and periodontal lesions and its possible territories projection other than their origin. The prevalence of RDP was 31.6%, higher in women (67.74%) though without statistical significance. The RDP was presented at a 45.16% together with periapical lesion and a 25.8% along with periodontal lesion. There was no relationship between age and RDP presence. The high prevalence of RDP found reinforces the need for a diagnosis of orofacial pain.
International Journal of Morphology, 2011
RESUMEN: Conocer el origen y distribución de las arterias circunflejas femorales (AaCF) en el hom... more RESUMEN: Conocer el origen y distribución de las arterias circunflejas femorales (AaCF) en el hombre, es importante en el momento quirúrgico de la reconstrucción vascular. Se disecó el contenido del triángulo femoral en 92 miembros inferiores de cadáveres formolizados, adultos, de sexo masculino y diferentes grupos étnicos, descubriéndose la arteria femoral (AF) y sus ramas originadas a nivel del triángulo femoral. Se localizó el origen de cada una de las AaCF determinándose el tipo y lugar de origen. La arteria circunfleja femoral medial (ACFM) se originó en 43 casos (46,7%) desde la AF; en 41 casos (44,6%) desde la arteria femoral profunda (AFP); en 7 casos (7,6%) en un tronco común formado por la AFP y AaCF y en un caso (1,1%) desde la arteria circunfleja femoral lateral (ACFL). La ACFM tenía en 75 casos (81,5%) un origen más proximal que la ACFL y en 9 casos (9,8%) su origen era al mismo nivel. La ACFL se originó en 68 casos (73,9%) desde la AFP; en 17 casos (18,5%) desde la AF; en 7 casos (7,6%) en un tronco común formado por la AFP y AaCF. El origen de la ACFL fue considerado independientemente si su ramo descendente se originaba desde ella o lo hacía desde la AF. Debido a la presencia de una serie de elementos nobles, conocer el origen preciso de las arterias y sus eventuales variaciones, adquiere especial importancia en los procedimientos realizados en la región.
International Journal of Morphology, 2010
International Journal of Morphology, 2011
... CORONADO, C.; ARRIAGADA, O. & SUAZO, GI Easy and unbiased determination of the maxillary ... more ... CORONADO, C.; ARRIAGADA, O. & SUAZO, GI Easy and unbiased determination of the maxillary sinus volume. Int. J. Morphol., 29(4):1375-1378, 2011. Page 4. 1378 Deeb, R.; Malani, PN; Gil, B.; Jafari-Khouzani, K.; Soltanian-Zadeh, H.; Patel, S. & Zacharek, MA Three ...
International journal of odontostomatology, 2013
The aim of this study was the evaluation of the discomfort level during the utilization of non oc... more The aim of this study was the evaluation of the discomfort level during the utilization of non oclusal intraoral appliance during sleep in patients with muscular temporomandibular dysfunction; time of acceptance; and the effectiveness of non oclusal intraoral appliance related to the relief of pain symptoms. We evaluated 30 patients from Orofacial Pain and Temporomandibular Dysfunction Clinic (UNIFESP/EPM/HSP) with muscular temporamandibular dysfunction, 25 females and 5 males, between 19 to 60 years. We used a non-oclusal intraoral appliance, based on the model developed by Minagi et al. (2001). Patients was conducted to use the appliance during all sleeping period e to persist in use, even when there was any kind of discomfort, which would be natural during the adaptation period, for 30 consecutive days. After this period, the researcher interviewed all patients, answering specific questions designed for this study. The mean time for adaptation was 4 days. Of all patients, 23.33% had no difficulty in adapting the appliance, with immediate acceptance. The gradual reduction in the intensity of myofascial pain and discomfort, as well as improving the quality of life in 78.3% of the sample confirmed the effectiveness of non-oclusal palatal intraoral appliance without occlusal contact in relieving the painful symptoms of muscular TMD.
International Journal of Morphology, 2013
The jaw muscles are essential components in the stomatognatic system. Their complex architecture ... more The jaw muscles are essential components in the stomatognatic system. Their complex architecture allows them to execute several motor tasks. One of the structural peculiarities is the presence of hybrid and neonatal fibers.We studied the differences of the fiber-type in masseter and temporalis muscles along the first to nineth decades in both genders. Seventy-four (74) samples were analyzed by immunohistochemistry. Slow and fast muscle fibers distribution was similar in both muscles in both genders. Hybrid fiber was observed in all decades, and its frequency decreased significantly (p<0.001) with aging in masseter. Neonatal myosin expression was observed in all decades, its expression was more frequent in masseter (p=0.01), and males in temporalis (p=0.025). Decrease of the cross sectional area of fast and slow fibers, and decrease of capillary density were detected with aging. These morpho-immunohistochemical alterations on masseter and temporalis muscles correlated to the decrease in bite force with aging.
International Journal of Morphology, 2012
In situations where the skeletal remains found are too fragmented, it is necessary to assess the ... more In situations where the skeletal remains found are too fragmented, it is necessary to assess the human origin of such remains; for this purpose, various parameters are used, both anatomical and histological. The objective of the present study is to evaluate the various histomorphometric parameters to differentiate human from non-human bones, to further construct discriminatory functions that allow interspecies classification. Tibia bones sections from human, bovine, pig, hen, cat, and dog species were used, processed through conventional histological techniques and observed under the microscope with a 40x magnification, analyzing the Haversian Canal Density parameters by mm 2 , Diameter of the Haversian Canal and the Diameter of the Haversian System which were compared through one way ANOVA with Scheffé post test, p<0.05. Subsequently, the discriminatory functions were constructed for each species and the percentage of well-diagnosed cases was determined. Meaningful differences were found in the parameters analyzed; the discriminatory functions allowed to correctly classify 88.5% of the cases. Our results suggest that it is possible to differentiate human skeletal remains from non-human through the observation of their histological characteristics and histomorphometric parameters, but interspecies differentiation requires a more complex analysis.
International Journal of Morphology, 2012
Observation of sexual chromatin has shown to be very helpful in gender forensic diagnosis. In the... more Observation of sexual chromatin has shown to be very helpful in gender forensic diagnosis. In the present study we analyzed the diagnosis performance of the method in, non-treated or treated with conventional bone techniques, exhumed bone pieces. We used long bones of male and female individuals, the method applied is described in Suazo et al. (2010). In the non-treated exhumed pieces, the general accuracy of the method was 75%, while in the treated pieces the method was inapplicable due to the lack of cells in the tissue. Our results suggest that it is possible to determine the sex of aged human bones buried under different conditions through a fast and simple histological method, but the treatment with physical and chemical means eliminates the remaining cells in the bone tissue.
International journal of odontostomatology, 2012
International Journal of Morphology, 2014
The variations in the origin of the facial and lingual arteries are very important in maxillofaci... more The variations in the origin of the facial and lingual arteries are very important in maxillofacial, head and neck surgery procedures. This study is a case report in which the common origin is described in the facial and lingual artery in a lingual-facial trunk (LFT) on the left side of a female corpse from Spain. In the examination, a diameter of 2.17 mm and a length of 8.84 mm are shown. It was located 12.04 mm from the carotid bifurcation and 9.31 mm from the origin of the superior thyroid artery. The variation in biometric values shown, are anatomical findings in the neck dissection of a corpse. Moreover, taking into account the surgical procedures, which involve the origin of facial and lingual artery, because it is the most common variation and could cause complications.
International Journal of Morphology, 2011
The vocal muscle is a striated muscle with important functions in the emission of laryngeal sound... more The vocal muscle is a striated muscle with important functions in the emission of laryngeal sound and physiology of the voice. Therefore the knowledge of its constitution is the basis for the prevention and management of voice disorders. We used 10 samples from the middle third of vocal muscles obtained from autopsies of 6 male and 4 female subjects aged between 36 and 71 years. The samples were analyzed with BA-F8 monoclonal antibody to slow type I fibers, and antimyosin HC monoclonal antibody and antimyosin fast clone MY-32 antibody for types IIA, IIB, IIX, and neonatal fibers. We determined the distribution of the muscle fiber types and morphometric characteristics, evaluating the differences by sex and age group. The human vocal muscle presented a heterogeneous formation with a predominance of type II fibers at 51.99%, while type I fibers reached 48.01%; this difference was significant (p <0.05). Comparing fiber subtypes IIA and IIX, there is a slight predominance of type IIX fibers, although this is not statistically significant (p>0.05). In conclusion, the human vocal muscle the fibers were predominantly type II fast.
International Journal of Morphology, 2013
International Journal of Morphology, 2012
The lower third molar region is an important region for the odontostomatological practice, since ... more The lower third molar region is an important region for the odontostomatological practice, since it presents a great amount of pathological processes related to the development and eruption of the third molar; thus having a considerable number of surgical interventions. Despite its importance, this region is not accounted for in anatomical terminology nor is it described in topographic anatomy; and in spite of the great number of studies that analyze the surgical anatomy of the region, it is necessary to systematize the description of its boundaries, planes, content, risk elements, anatomical repairs, etc.; therefore, the purpose of the present article is to review the modern concepts related to the surgical anatomy of the lower third molar region and to establish a description based on these concepts.
International Journal of Morphology, 2012
In this study we tested the hypothesis that diagnostic performance of the morphological indicator... more In this study we tested the hypothesis that diagnostic performance of the morphological indicators for sexual dimorphism are reduced as they are applied in skull and mandibles of older subjects. We used 275 adult human skulls, 250 of these with mandible, all subjects with sex and age registry. Sixteen classic morphological indicators of sexual dimorphism were evaluated, this information was compared with the registry and results noted in terms of precision. The best general performance of morphological indicators of sexual dimorphism were recorded in the 31-40 and 61-70 years, age range groups. Lowest precision ws recorded in the group corresponding to subjects between 21-30 years. Our results do not support the proposed hypothesis and suggest a progressive and cumulative effect of factors that determine dimorphism expression.
International Journal of Morphology, 2010
POMPEI FILHO, H.; SUAZO, G. I.; ZAVANDO, D. & GUIMARÃES, A. S. Anterior disc displacement and the... more POMPEI FILHO, H.; SUAZO, G. I.; ZAVANDO, D. & GUIMARÃES, A. S. Anterior disc displacement and the superior head of lateral pterygoid muscle. A case-control study. Int. J. Morphol., 28(2):365-368, 2010.
Loth & Henneberg (1996) described a simple morphological feature for sex determination by observi... more Loth & Henneberg (1996) described a simple morphological feature for sex determination by observing the flexure
of the posterior margin of the mandibular ramus, at the level of the plane occlusal. The purpose of this study is to analyze the level of
agreement for determining the sex by observing the parameters described by Loth and Henneberg, in ortopantomography of totally
dentate Chilean young adults. This study is based on 188 files of ortopantomography acquired from the Department of Radiology of the
Dental School of Universidad de Talca, Chile. In brief, our studies indicated that in the ortopantomography of females 63.25% (62-
64.5%) was correctly sexed, whereas the prediction accuracy was only 48.25% (46.5–50%) for men. The success percentages were
lower than those reported by Loth and Henneberg, which justifies the necessity to evaluate the methods of anthropological–forensic
analysis that are used in our population.
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Papers by Iván Suazo Galdames
of the posterior margin of the mandibular ramus, at the level of the plane occlusal. The purpose of this study is to analyze the level of
agreement for determining the sex by observing the parameters described by Loth and Henneberg, in ortopantomography of totally
dentate Chilean young adults. This study is based on 188 files of ortopantomography acquired from the Department of Radiology of the
Dental School of Universidad de Talca, Chile. In brief, our studies indicated that in the ortopantomography of females 63.25% (62-
64.5%) was correctly sexed, whereas the prediction accuracy was only 48.25% (46.5–50%) for men. The success percentages were
lower than those reported by Loth and Henneberg, which justifies the necessity to evaluate the methods of anthropological–forensic
analysis that are used in our population.
of the posterior margin of the mandibular ramus, at the level of the plane occlusal. The purpose of this study is to analyze the level of
agreement for determining the sex by observing the parameters described by Loth and Henneberg, in ortopantomography of totally
dentate Chilean young adults. This study is based on 188 files of ortopantomography acquired from the Department of Radiology of the
Dental School of Universidad de Talca, Chile. In brief, our studies indicated that in the ortopantomography of females 63.25% (62-
64.5%) was correctly sexed, whereas the prediction accuracy was only 48.25% (46.5–50%) for men. The success percentages were
lower than those reported by Loth and Henneberg, which justifies the necessity to evaluate the methods of anthropological–forensic
analysis that are used in our population.