Browsing by Author "Cantin, Mario"

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    Comparative study between conservative solutions with and without formaldehyde in human placenta
    (SOC CHILENA ANATOMIA, 2012) Wolff, Daniel; Villa, Pablo; Neirreitter, Alejandra; Ruibal, Cecilia; Armand Ugon, Gustavo; Salgado, Guillermo; Cantin, Mario
    The fixation and conservation techniques of anatomic material are commonly performed with solutions containing formaldehyde, given its low cost. These have several disadvantages such as the irritating odor, stiffness, discoloration of the structures, toxicity, carcinogenic, teratogenic and mutagenic risk for those who are exposed. Therefore it is desirable to use solutions without formaldehyde. The aim of this study was to compare 2 methods of anatomical conservation, one with formalin (Montevideo's solution) and one without formalin (Prives method) using the human placenta as an experimental organ model evaluating its macroscopic parameters. We used 46 human placentas from normal deliveries and term pregnancy. The placentas were separated into two groups (n=22 and n=24 respectively). The first group of placentas was perfused with formaldehyde solution and the second group in a solution without formaldehyde. Then both groups were immersed and maintained in their respective solutions for two weeks and then withdrawn leaving the air at room temperature for 2 weeks. Quantitative variables were analyzed for weight and diameter of each piece, and qualitative variables as consistency, color, odor and growth of micro/macro organisms were evaluated. Data collection was performed prior to washing at 14, 21 and 28 days. The results showed that conserved placentas with Prives method showed better conservation in relation to its diameter, consistency, color and less irritating odor in relation to placentas treated with formalin solution. In no case was growth of micro or macro organism. In conclusion, using advantageously at alternative solutions to formaldehyde, as the formula of Prives method, better preserved macroscopic characteristics of placentas without generating an irritating smell, stopping the decomposition process.
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    Estudio Morfométrico de las Suturas Palatinas Humanas en Recién Nacidos, Infantes y Niños con Fines de Tratamiento por Distracción Osteogénica
    (2013) Cantin, Mario; Olate, Sergio; Fonsea, Camila; Inzunza, Oscar; Contreras Briceño, Felipe; Salgado A., Guillermo
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    Evaluation of mandibular anatomy related to sagittal split ramus osteotomy
    (SOC CHILENA ANATOMIA, 2012) Salgado A, Guillermo; Inzunza H, Oscar; Cantin, Mario; Fuentes, Ramon; Inostroza, Veronica; Jesus Errazuriz, Maria; Pavez, Cindy
    Sagittal split ramus osteotomy (SSRO) of the mandible is one of the most common surgical techniques to correct mandibular deformities. In order to prevent many surgical anatomical problems, surgeons have found that further investigation of the anatomical structures related to SSRO is needed. This study aims to investigate positions of the antilingula (AL), inferior alveolar nerve (IAN) and other anatomic landmarks in relation to the lingula of dried mandibles. 70 Chilean dried hemimandibles were studied. The AL, others landmarks and the corresponding position of the L were marked on the internal and external aspect of the mandibular ramus respectively. The distances from the AL, IAN and L were measured in the anterior posterior and the superior inferior planes using a digital caliper and geometric relationship was established. The results showed the AL was discernible in 100% of lateral mandibular rami studied. The most of the AL was found anteriorly to the L with a mean distance of 0.66 +/- 2.43mm and 0.92 +/- 2.56mm, and 4.23 +/- 2.97mm and 3.62 +/- 3.14mm superiorly (right-left sides respectively) (both with p value <0.001). Similar values were seen in relation with IAN. No significant differences were found between the right and left sides, for the majority of parameters. The studied parameters will assist clinicians to determine the anatomical proximity to the IAN, and, minimize the risk of damaging nerver and vessels. We do not recommend the use of antilingula as only anatomical landmark when performing a SSRO procedure.