Reparação da parede abdominal com membranas acelulares de pericárdio bovino - Parte II - Análises histológicas e morfométricas / Repair of the abdominal wall with acellular bovine pericardial membranes - Part II - Histological and morphometric analyses

Introdução: Análise histológica é a principal ferramenta de avaliação de biopróteses acelulares, em sua maioria em caráter experimental. O objetivo é analisar histologicamente a matriz acelular de pericárdio bovino em reparações de parede abdominal implantada em humanos. Método: De uma série de 30 reparações com a membrana, 3 pacientes foram submetidas a revisão cirúrgica não relacionada aos implantes, aos 13, 22 e 23 meses de pós-operatório, obtendo-se biópsias das áreas previamente implantadas. Além da avaliação dos aspectos básicos de biocompatibilidade e neoformação tecidual, as lâminas foram digitalizadas e submetidas a análise computadorizada com o software ImageJ para quantificação da cinética de degradação das membranas, associada à análise da dimensão fractal das amostras. Os valores obtidos para porcentagens de membrana residual tiveram suas médias comparadas por análise de variância (ANOVA) e pelo teste T de Student não pareado, também utilizado para os valores da quantificação da dimensão fractal. Resultados: Foi demonstrada a biocompatibilidade do material, com neoformação tecidual, deposição de colágeno e tecido celularizado de aspecto normal, sem reações locais importantes. Fragmentos residuais da membrana foram quantificados em 40%±7% aos 13 meses, em 20%±6% aos 22 meses e em 17%±6% aos 23 meses de pós-operatório, com a análise da dimensão fractal indicando uma progressiva degradação dos implantes, com significância estatística entre 13 meses e as amostras tardias. Conclusão: Os resultados atestaram a funcionalidade do pericárdio bovino acelular sob diferentes níveis de estresse mecânico nas reparações da parede abdominal em humanos.

Introduction: Histological analysis is the main tool for evaluating acellular bioprostheses, mostly on an experimental basis. The objective is to histologically analyze the acellular matrix of bovine pericardium in abdominal wall repairs implanted in humans. Method: From a series of 30 repairs with the membrane, 3 patients underwent surgical revision unrelated to the implants at 13, 22, and 23 months postoperatively, obtaining biopsies of the previously implanted areas. In addition to evaluating the basic aspects of biocompatibility and tissue neoformation, the slides were digitalized and subjected to computerized analysis with the ImageJ software to quantify the kinetics of membrane degradation associated with the analysis of the fractal dimension of the samples. The values obtained for percentages of residual membrane had their means compared by analysis of variance (ANOVA) and the unpaired Student's T test, also used for the fractal dimension quantification values. Results: The biocompatibility of the material was demonstrated, with tissue neoformation, collagen deposition, and cellularized tissue with a normal appearance without important local reactions. Residual fragments of the membrane were quantified at 40%±7% at 13 months, at 20%±6% at 22 months, and at 17%±6% at 23 months postoperatively, with the analysis of the fractal dimension indicating a progressive degradation of implants, with statistical significance between 13 months and late samples. Conclusion: The results confirmed the functionality of the acellular bovine pericardium under different levels of mechanical stress in abdominal wall repairs in humans.

Finger Prosthesis Driven by DEA Pairs as Agonist-Antagonist Artificial Muscles.

Loss of an upper limb exerts a negative influence on an individual's ability to perform their activities of daily living (ADLs), reducing quality of life and self-esteem. A prosthesis capable of performing basic ADLs functions has the capability of restoring independence and autonomy to amputees. However, current technologies present in robotic prostheses are based on rigid actuators with several drawbacks, such as high weight and low compliance. Recent advances in robotics have allowed for the development of flexible actuators and artificial muscles to overcome the limitations of rigid actuators. Dielectric elastomer actuators (DEAs) consist of a thin elastomer membrane arranged between two compliant electrodes capable of changing dimensions when stimulated with an electrical potential difference. In this work, we present the design and testing of a finger prosthesis driven by two DEAs arranged as agonist-antagonist pairs as artificial muscles. The soft actuators are designed as fiber-constrained dielectric elastomers (FCDE), enabling displacement in just one direction as natural muscles. The finger prosthesis was designed and modeled to show bend movement using just one pair of DEAs and was made of PLA in an FDM 3D printer to be lightweight. The experimental results show great agreement with the proposed model and indicate that the proposed finger prosthesis is promising in overcoming the limitations of the current rigid based actuators.

Mechanical assessment of novel compliant mechanisms for underactuated prosthetic hands.

This paper proposes novel compliant mechanisms for constructing hand prostheses based on soft robotics. Two models of prosthetic hands are developed in this work. Three mechanical evaluations are performed to determine the suitability of the two designs for carrying out activities of daily living (ADLs). The first test measures the grip force that the prosthesis can generate on objects. The second determines the energy required and dissipated from the prosthesis to operate. The third test identifies the maximum traction force that the prosthesis can support. The tests showed that the PrHand1 prosthesis has a maximum grip force of 23.38 ± 1.5 N, the required energy is 0.76 ± 0.13 J, and the dissipated energy is 0.21 ± 0.17 J. It supports a traction force of 173.31 ± 5.7 N. The PrHand2 prosthesis has a maximum grip force of 36.13 ± 2.3 N, the required energy is 1.28 ± 0.13 J, the dissipated energy is 0.96 ± 0.12 J, and it supports a traction force of 78.48 ± 0 N. In conclusion, the PrHand1 prosthesis has a better performance in terms of energy and tensile force supported. The difference between the energy and traction force results is related to two design features of the PrHand2: fully silicone-coated fingers and a unifying mechanism that requires more force on the tendons to close the prosthesis. The grip force of the PrHand2 prosthesis was more robust than the PrHand1 due to its silicone coating, which allowed for an improved grip.

Upper Extremity Prosthetics: Current Options and Future Innovations.

Major upper extremity amputations can have a considerable impact on patients' lives, altering their ability to independently perform activities of daily living and leading to changes in occupations and hobbies. Although upper extremity prosthetics have existed for millennia, recent advances have improved prosthetic motor control and sensory feedback, leading to increased overall satisfaction. The goal of this article was to describe the current options that exist for upper extremity prosthetics and explore the recent advances and future directions in prosthetic technology and surgical techniques.

Arch Symmetry in Patients Without and With Cleft Lip and Palate After Orthodontic/Rehabilitative Treatment-A Stereophotogrammetry Study.

To evaluate and compare the dental arch symmetry of individuals with and without cleft lip and palate after orthodontic/rehabilitation treatment.Cross-sectional study.Tertiary cleft center in Brazil.Fifty-five participants aged between 18 and 30 years were divided into 3 groups according to treatment. Patients that received either a fixed partial denture (FPD) or implant-supported crown (ISC) in the cleft area or only orthodontic treatment, noncleft patients (NC).An analysis was performed using digitized dental casts scanned by laser and software. The following linear measurements were evaluated: incisor-canine; canine-molar; incisor-molar; surface and volume of the palatal region.Three-way ANOVA was used to compare the study factors: group (FPD/ISC/NC) and side (right/left) followed by the Tukey test to verify their interaction (α = .05).The results showed statistically significant differences among groups for the maxillary linear measurements canine-molar and incisor-molar, but not for incisor-canine. No statistically significant differences were found regarding the side for the maxillary measurements, while the factor interaction showed similarity only for incisor-canine. The mandibular measurements showed no statistical differences among groups, sides, or factor interactions. In surface and volume, all values in patients with cleft presented lesser than in without cleft patients.Regardless of the rehabilitation, arch symmetry can be achieved in the incisor-canine dimension in the cleft area.

Production of dental prosthetics in the SUS in Brazilian older population and impact of the covid-19 pandemic / Produção de próteses dentárias no SUS em idosos brasileiros e impacto da pandemia covid-19

ABSTRACT OBJECTIVE Describe the trends in the production of dental prosthetics by the Unified Health System (SUS) in older people aged 60 years or older in Brazil and country regions from 2010 to 2019 and the impact of the covid-19 pandemic on the expected production for 2020 and 2021. METHODS A time series study using secondary data from the SUS database (Datasus-Tabnet) and the Instituto Brasileiro de Geografia e Estatística (Brazilian Institute of Geography and Statistics - IBGE) from 2010 to 2021. Age-standardized rates were calculated for Brazil and regions for each year analyzed. Generalized linear regressions estimated production trends using the Prais-Winstein estimation method. RESULTS A growth trend occurred in the standardized production rate of complete dentures and other prosthetics per 100,000 inhabitants in Brazil and all country regions. The increase in the production of complete dentures was higher in the Northeast region (50.3%/year) and lower in the North region (19.1%/year). Trends in the production of other prosthetics were higher in the Southeast region (120.7%/year) and lower in the North region (24.5%/year). The output of prosthetics for both groups decreased in the pandemic years. In 2020, the relative difference ranged from -36.4% (North) to -61.7% (Northeast) for producing complete dentures and from -17.9% (North) to -68.4% (Northeast) for other prosthetics. In 2021, standardized rates and total production increased compared to the previous year. However, compared with expected values, the differences were close to those in 2020. CONCLUSION Policies aimed at producing complete dentures and other prosthetics have been increasing. However, production remains far from the population's needs, and there is no equity in providing services. The covid-19 pandemic negatively impacted the production of dental prosthetics by SUS.

RESUMO OBJETIVO Descrever as tendências na produção de próteses odontológicas pelo Sistema Único de Saúde (SUS) em idosos de 60 anos ou mais no Brasil e nas regiões do país de 2010 a 2019, e o impacto da pandemia de covid-19 na produção esperada para 2020 e 2021. MÉTODOS Estudo de séries temporais que utilizou dados secundários provenientes do banco de dados do SUS (Datasus-Tabnet), e do Instituto Brasileiro de Geografia e Estatística, no período de 2010 a 2021. Calcularam-se as taxas padronizadas por idade para o Brasil e regiões de cada ano analisado. Regressões lineares generalizadas, pelo método de estimação de Prais-Winstein, estimaram as tendências das produções. RESULTADOS Houve tendência de crescimento na taxa padronizada de produção das próteses totais e das demais próteses para cada 100 mil habitantes, no Brasil e em todas as regiões do país. O aumento na produção de próteses totais foi maior na região Nordeste (50,3%/ano) e menor na região Norte (19,1%/ano). As tendências na produção das demais próteses foram maiores na região Sudeste (120,7%/ano) e menores na região Norte (24,5%/ano). A produção de próteses para ambos os grupos diminuiu nos anos de pandemia. Em 2020, a diferença relativa variou de -36,4% (Norte) até -61,7% (Nordeste) para a produção de próteses totais e de -17,9% (Norte) até -68,4% (Nordeste) para as demais próteses. Em 2021, as taxas padronizadas e a produção absoluta aumentaram quando comparadas ao ano anterior, todavia, em relação aos valores esperados, as diferenças foram próximas às encontradas em 2020. CONCLUSÃO Políticas voltadas para a produção de próteses totais e das demais próteses vêm tomando forças e crescendo. Todavia, a produção se mantém distante da necessidade da população e não há equidade na oferta dos serviços. A pandemia de covid-19 impactou negativamente na produção de próteses dentárias pelo SUS.

Somatoprótesis y Estallido Social Chileno 2019

Durante el Estallido Social en Chile 2019, la Odontología tomó un rol protagónico que nadie esperaba: La rehabilitación protésica de las víctimas de trauma ocular. Estos eventos dejaron al desnudo importantes fragilidades del sistema de salud Chileno.

During the social unrest in Chile in 2019, dentistry took a protagonist role that no one foresaw: The prosthetic rehabilitation of the ocular trauma victims. These events revealed important flaws on the Chilean Health system.

Present and future of extraoral maxillofacial prosthodontics: Cancer rehabilitation.

Historically, facial prosthetics have successfully rehabilitated individuals with acquired or congenital anatomical deficiencies of the face. This history includes extensive efforts in research and development to explore best practices in materials, methods, and artisanal techniques. Presently, extraoral maxillofacial rehabilitation is managed by a multiprofessional team that has evolved with a broadened scope of knowledge, skills, and responsibility. This includes the mandatory integration of different professional specialists to cover the bio-psycho-social needs of the patient, systemic health and pathology surveillance, and advanced restorative techniques, which may include 3D technologies. In addition, recent digital workflows allow us to optimize this multidisciplinary integration and reduce the active time of both patients and clinicians, as well as improve the cost-efficiency of the care system, promoting its access to both patients and health systems. This paper discusses factors that affect extraoral maxillofacial rehabilitation's present and future opportunities from teamwork consolidation, techniques utilizing technology, and health systems opportunities.

Inter-incisive index in Bulgarians and its application in dentistry / Indice interincisivo en búlgaros y su aplicación en odontología

SUMMARY: In recent years, aesthetic dentistry has become a major focus for the public. Facial attractiveness plays a key role on modern society and the creation of harmonious smile is an aim for every dentist. The objective of this study was to define certain values of the inter-incisive index in Bulgarians, the sexual dimorphism and bilateral asymmetry and to verify differences of this index between Bulgarians and other Balkan populations. The present study included 121 males and 111 females of Bulgarian origin aged 20- 40 years. Mesiodistal dimensions of maxillary central and lateral incisors were measured by Dentistry Sliding Vernier Caliper. We used the technique of direct anthropometry, modified by Prof. Y. Yordanov. We calculated the inter-incisive index as ratio of the mesiodistal dimension of maxillary lateral incisor to the mesiodistal dimension of the maxillary central incisor. The measurements were analyzed with SPSS 23. The level of statistical significance was set at P< 0.05. The inter-incisive index showed no statistically significant differences between left and right side of the dental arch in both sexes. We did not find statistically significant differences between males and females as well. On the other hand, we found statistically significant differences in MD values of incisors between Bulgarians and other Balkan nations. Inter-incisive index shows no sexual dimorphism and bilateral asymmetry in Bulgarians. This can be helpful in aesthetic dentistry, in prosthodontics and in orthodontic treatment planning.

RESUMEN: En los últimos años, la odontología estética se ha convertido en un foco importante para el público. El atractivo facial juega un papel clave en la sociedad moderna y la creación de una sonrisa armoniosa es importante para todos los dentistas. El objetivo de este estudio fue definir ciertos valores del índice interincisivo en búlgaros, el dimorfismo sexual y la asimetría bilateral y verificar diferencias de este índice entre búlgaros y otras poblaciones balcánicas. El presente estudio incluyó a 121 hombres y 111 mujeres de origen búlgaro entre 20 y 40 años de edad. Las dimensiones mesiodistales de los incisivos superiores centrales y laterales se midieron con un calibrador Vernier deslizante de odontología. Utilizamos la técnica de antropometría directa, modificada por el Prof. Y. Yordanov y se calculó el índice interincisivo como la relación entre la dimensión mesiodistal del incisivo lateral superior y la dimensión mesiodistal del incisivo central superior. Las medidas se analizaron con SPSS 23. El nivel de significancia estadística se fijó en P<0,05. El índice interincisivo no mostró diferencias estadísticamente significativas entre los lados izquierdo y derecho de la arcada dentaria en ambos sexos. Tampoco encontramos diferencias estadísticamente significativas entre hombres y mujeres. Por otro lado, encontramos diferencias estadísticamente significativas en los valores de DM de los incisivos entre búlgaros y otras naciones balcánicas. El índice interincisivo no muestra dimorfismo sexual ni asimetría bilateral en los búlgaros. Esto puede ser útil en odontología estética, en prostodoncia y en la planificación de tratamientos de ortodoncia.

Obsolescência programada em serviços de saúde: o caso da Máfia das Próteses / Planned obsolescence in public health services: the Prosthetic Mafia case

Resumo Obsolescência programada é um conjunto de ações empreendidas por parte do produtor com o objetivo de estabelecer o decaimento gradativo de algum atributo de uma mercadoria para, assim, estimular artificialmente a demanda pelo consumo. A literatura sobre o fenômeno tem apontado como vítimas somente indivíduos e, como forma de manifestação do fenômeno, objetos. Este trabalho aponta a ocorrência do fenômeno de obsolescência programada em serviços públicos de saúde. Para isso, é empreendido um estudo exploratório-interpretativo de abordagem qualitativa e utilizado como estratégia de pesquisa o estudo de caso. A unidade de análise foi a nomeada Máfia das Próteses e, para coleta de dados, foram empregadas as técnicas de pesquisa bibliográfica e documental. Como resultado, foram selecionados e expostos três casos da ocorrência do fenômeno em cirurgias. Foi também realizado um esforço interpretativo dos condicionantes, da dinâmica e dos efeitos da prática de sabote cirúrgico com objetivo de estimular a demanda por serviços médicos e equipamentos médico-hospitalares. Como contribuição, este estudo realiza o delineamento dos elementos que caracterizam a ocorrência deste fenômeno em serviços médicos. Além disso, inaugura uma agenda de futuros estudos que abordam tanto o Estado sendo vitimado pela prática, quanto a ocorrência do fenômeno no setor de serviços.

Abstract Planned obsolescence is a set of actions undertaken by the producer to establish the gradual decay of some attribute of a commodity, artificially stimulating the demand for consumption. The literature on the phenomenon has identified only individuals as victims and objects as forms of expression. This study reports the occurrence of planned obsolescence in public health services. To this end, it consists of an exploratory-interpretative study with a qualitative approach, using the case study of the so-called Prosthetic Mafia. Data were collected by means of bibliographic and documentary research, resulting in three cases that expose the phenomenon occurrence in surgeries. The results were analyzed through an attempt to interpret the conditions, dynamics, and effects of the practice of surgical sabotage to stimulate the demand for medical services and medical-hospital equipment. This study outlines the elements that characterize planned obsolescence occurrence in medical services, inaugurating an agenda of future studies that address both the State being victimized by the practice and the phenomenon in the service sector.

New technologies applied to canine limb prostheses: A review.

Although only a few studies have investigated about the development of animal prosthesis, currently, there is an increasing interest in canine limb prosthesis design and its clinical application since they offer an alternative to killing the animal in extreme situations where amputating the limb is the only option. Restoring normal function of amputated canine limbs with the use of a prosthesis is challenging. However, recent advances in surgical procedures and prosthesis design technology appear promising in developing devices that closely recreate normal canine limb function. Surgical advances such as evolution of osseointegration (bone-anchored) prostheses present great promise. Likewise, modern computer-aided design and manufacturing technology, as well as novel motion analysis systems are now providing improved prosthesis designs. Advances in patient-customized prostheses have the potential to reduce the risk of implant failure. The objective of this investigation is to present a general review of the existing literature on modern surgical approaches, design and manufacturing methods, as well as biomechanical analyses so that veterinarians can make more and better-informed decisions on the development and selection of proper canine limb prosthesis. Isolated research efforts have made possible an improvement in stability, comfort, and performance of canine limb prosthesis. However, continued multidisciplinary research collaboration and teamwork among veterinarians, engineers, designers, and industry, with supporting scientific evidence, is required to better understand the development of canine limb prosthesis designs that closely replicate the normal limb function.

Poisoning by metals used in prothetic materials in orthopedics and its current management / Envenenamiento por metales en materiales protésicos en ortopedia y su tratamiento actual

Poisoning by metals present in prosthetic materials used in orthopedics is caused by the release of waste metals that are generated mainly by wear and corrosion. The objective of this study is to detail which are the current clinical and pathophysiological manifestations of the prosthetic metals used in orthopedics as well as the management of the most frequent arthroplasty associated with metal toxicity, hip arthroplasty, mentioning the most frequent metals that produce toxicity and implants or arthroplasties that carry a risk of developing intoxication. A narrative review was carried out through various databases from January 2005 to January 2021; the search and selection of articles were carried out in journals indexed in English. The results provided updated and organized information on the clinical and pathophysiological manifestations caused by the different types of frequent metals that produce toxicity present in prosthetic materials, as well as the management of hip arthroplasty(AU)

La intoxicación por los metales presentes en materiales protésicos utilizados en ortopedia se produce por la liberación de metales de desecho, que se generan principalmente por el desgaste y la corrosión. El objetivo de este estudio es detallar cuáles son las manifestaciones clínicas y fisiopatológicas actuales de los metales protésicos utilizados en ortopedia así como el tratamiento de las artroplastias más frecuentes asociadas a toxicidad por metales, la artroplastia de cadera, mencionando los metales más frecuentes que producen toxicidad e implantes o artroplastias que conllevan riesgo de intoxicación. Se realizó una revisión narrativa a través de varias bases de datos desde enero de 2005 hasta enero de 2021; la búsqueda y selección de artículos se realizó en revistas indexadas en inglés. Los resultados proporcionaron información actualizada y organizada sobre las manifestaciones clínicas y fisiopatológicas provocadas por los diferentes tipos de metales frecuentes que producen toxicidad que están presente en los materiales protésicos, así como el manejo de la artroplastia de cadera(AU)

Principales factores biopsíquicos relacionados con la rehabilitación protésica dental en ancianos institucionalizados / Main biopsychic factors related to the dental prosthetics rehabilitation in institutionalized elderly

Introducción: El envejecimiento constituye la transformación demográfica más importante del mundo actual. La mayor proporción de personas de edad avanzada en la comunidad supone un reto de extraordinaria trascendencia en cuanto a la satisfacción de sus demandas sociales, sanitarias, económicas y culturales. Objetivo: Determinar los factores biopsíquicos relacionados con la rehabilitación protésica dental en ancianos. Métodos: Se realizó un estudio descriptivo y transversal de 60 ancianos pertenecientes a la Casa de Abuelos "Corazones contentos" del reparto Sueño -categorizados en adaptados y resistentes según factores psicológicos-, quienes acudieron al Departamento de Prótesis de la Clínica Estomatológica Provincial Docente Mártires del Moncada de Santiago de Cuba, desde marzo del 2018 hasta enero de 2020. Resultados: En la serie primaron los pacientes de 80 y más años de edad y del sexo femenino. Como característica biológica relevante figuró el desdentamiento total y como enfermedad crónica no trasmisible fue más frecuente la diabetes mellitus. De igual modo, el mayor número de ancianos correspondió a la categoría psicológica de resistente. Conclusiones: La mayoría de los ancianos se caracterizaron por un perfil psicológico resistente, determinado por un estilo de afrontamiento pasivo, expresión emocional negativa e inexistencia de autonomía, lo que condicionaba una actitud dañina hacia su salud bucal.

Introduction: Aging constitutes the most important demographic transformation nowadays. The higher proportion of elderly in the community supposes a challenge of extraordinary transcendence as for the satisfaction of their social, sanitary, economic and cultural demands. Objective: To determine the biopsychic factors related to the dental prosthetics rehabilitation in elderly. Methods: A descriptive and cross-sectional study of 60 elderly was carried out in "Corazones contentos" Home for the elderly at Sueño neighborhood -categorized in adapted and resistant according to psychological factors- who went to the Prosthesis Department of Mártires del Moncada Teaching Provincial Stomatological Clinic in Santiago de Cuba, from March, 2018 to January, 2020. Results: In the series there was prevalence of 80 years and over patients from the female sex. As outstanding biological characteristic there is the total dental loss and as chronic non transmissible disease the diabetes mellitus was more frequent. In a same way, the higher number of elderly corresponded to the psychological category of resistant. Conclusions: Most of the elderly are characterized by a resistant psychological profile, determined by a style of passive confrontation, negative emotional expression and lack of autonomy, what conditioned a harmful attitude toward their oral health.

Applications of Silver Nanoparticles in Dentistry: Advances and Technological Innovation.

Silver nanoparticles (AgNPs) have been successfully applied in several areas due to their significant antimicrobial activity against several microorganisms. In dentistry, AgNP can be applied in disinfection, prophylaxis, and prevention of infections in the oral cavity. In this work, the use of silver nanoparticles in dentistry and associated technological innovations was analyzed. The scientific literature was searched using PubMed and Scopus databases with descriptors related to the use of silver nanoparticles in dentistry, resulting in 90 open-access articles. The search for patents was restricted to the A61K code (International Patent Classification), using the same descriptors, resulting in 206 patents. The results found were ordered by dental specialties and demonstrated the incorporation of AgNPs in different areas of dentistry. In this context, the search for patents reaffirmed the growth of this technology and the dominance of the USA pharmaceutical industry over AgNPs product development. It could be concluded that nanotechnology is a promising area in dentistry with several applications.

Multidisciplinary Approach for Reestablishing Function and Aesthetic of Unilateral Cleft Lip Defect: A Case Report.

Cleft lip and/or cleft palate defects often result in a functional deficiency in the patient's chewing, speech ability, and aesthetic appearance, usually demanding multidisciplinary effort for addressing the aesthetic and functional patient's requirements. This clinical report describes the planned oral rehabilitation of a 46-year-old woman with unilateral cleft lip defect based on the patient's peculiarities and age. Due to limitations concerning bone grafts and implant procedures, as well as orthodontic treatment, the prosthodontic rehabilitation using the metal-ceramic fixed partial denture was chosen. The treatment adequately reestablished the aesthetic and functional activities, positively impacting the patient's quality of life.

[Anatomical description of the anterior hip approach: safety and effect for total arthroplasty]. / Descripción anatómica del abordaje anterior de cadera: seguridad y efecto para artroplastía total.

INTRODUCTION: The anterior hip approach was described since 1881, since then several studies have been conducted that have shown significant advantages over the posterior and lateral direct approaches of the hip. MATERIAL AND METHOD: We conducted a descriptive study with continuous non-probabilistic cases at the Institute of Forensic Sciences from October 2015 to July 2017. Anatomy and distances were described to the neurovascular bundles. Correlation of Spearmans Pearson and Rho was performed. RESULTS: 22 dissections were made, the Femorocutaneous Nerve was identified in 9 specimens, the average lateral Femorocutaneous Nerve distance at Smith-Petersen interval was 11.4 mm, We identified the Ascending Lateral Circumflex artery under the femoral rectum towards the central region of the approach, the separators could be placed around the coxofemoral joint without injuring vital structures, the riskier separator we place it in the anterior wall of the acetabulum, below the Psoasyland with an average distance 28.25 mm to the femoral package. The older you go, the longer the neurovascular bundles were located p 0.05. CONCLUSIONS: High level of safety of the previous approach for hip replacement, distances to vital structures have a reasonable margin, hip replacement offers adequate joint exposure, direct acetabulum vision and atraumatic surgical dissection.

INTRODUCCIÓN: El abordaje anterior de cadera fue descrito en 1881, desde entonces se han realizado diversos estudios que han demostrado ventajas significativas frente a los abordajes posterior y lateral directo de cadera. MATERIAL Y MÉTODO: Se llevó a cabo un estudio descriptivo con casos continuos no probabilísticos en el Instituto de Ciencias Forenses de Octubre de 2015 a Julio de 2017. Se describió anatomía y distancias a los paquetes vasculonerviosos. Se realizó correlación de Pearson y Rho de Spearman. RESULTADOS: Se efectuaron 22 disecciones, el nervio femorocutáneo fue identificado en nueve especímenes, la distancia promedio del nervio femorocutáneo lateral al intervalo de Smith-Petersen fue 11.4 mm, se identificó la arteria circunfleja lateral ascendente debajo del recto femoral hacia la región central del abordaje, se colocaron los separadores alrededor de la articulación coxofemoral sin lesionar estructuras vitales, el separador más riesgoso se ubicó en la pared anterior del acetábulo, debajo del músculo iliopsoas con distancia promedio de 28.25 mm al paquete femoral. A mayor edad mayor distancia a los paquetes neurovasculares p 0.05. CONCLUSIONES: Alto nivel de seguridad del abordaje anterior para artroplastía de cadera, las distancias a estructuras vitales presentan un margen razonable, en artroplastía de cadera ofrece adecuada exposición de la articulación, visión directa del acetábulo y disección quirúrgica atraumática.

Caracterización clínica y sociodemográfica de la población infantojuvenil entre 2 y 17 años con diagnóstico de deficiencia de extremidades superiores adquirida y/o congénita, en el Instituto Teletón Santiago / Clinical and sociodemographic characterization of the child and youth population between 2 and 17 years old with a diagnosis of acquired or congenital upper limbs deficiency at Instituto Teletón Santiago

INTRODUCCIÓN: Las deficiencias congénitas y adquiridas de extremidades superiores son una condición importante en la población pediátrica, existe poca información respecto de sus características clínicas, sociodemográficas y las asociadas al uso de prótesis. OBJETIVO: Describir las características clínicas y sociodemográficas de la población infantojuvenil entre 2 y 17 años con diagnóstico de deficiencia de extremidades superiores adquirida y/o congénita, pertenecientes al Instituto Teletón Santiago (IT-S). METODOLOGÍA: Estudio transversal, en población infantojuvenil entre 2 y 17 años, con diagnóstico de deficiencia de extremidades superiores, adquirida y congénita, que se atienden en el IT-S. Se realizó una revisión de fichas clínicas y encuesta para la obtención de datos de características sociodemográficas, clínicas y asociadas al uso de prótesis. RESULTADOS: Se incluyeron 215 pacientes, 93,9% de etiología congénita y 6,1% adquirida. El nivel de la deficiencia más frecuente fue parcial de mano con 51,6%, seguido del transradial con 33,1%. El 33% de los 215 pacientes estudiados tuvieron prescripción de prótesis. De los pacientes con prescripción de prótesis, 78,9% correspondía a mecánica y 18,3% a prótesis 3D. El 53,5% usaba su prótesis y el 46,4% no la usaba. Respecto a las prótesis 3D, el 84,6% no la usaban. En el nivel parcial de mano, el 83,3% no usaban su prótesis. CONCLUSIONES: Este estudio aporta datos de importancia clínica, destacando, una prescripción protésica de inicio temprano y asociada a las características clínicas de los pacientes. Así mismo, existe una alta tasa de no uso de las prótesis 3D, en el nivel parcial de mano.

INTRODUCTION: Congenital and acquired deficiencies of the upper extremities are an important condition in the pediatric population, however, there is almost no information regarding the clinical and sociodemographic characteristics and those associated with the use of prostheses. OBJECTIVE: Describe the clinical and sociodemographic characteristics of the child and adolescent population between 2 and 17 years old with a diagnosis of acquired and/or congenital upper limb deficiency, belonging to the Instituto Teletón Santiago (IT-S). METHODS: A cross-sectional study was conducted in child and adolescent population between 2 and 17 years old, with a diagnosis of acquired and/ or congenital upper limb deficiency treated in the IT-S. A review of clinical records and a survey were carried out to obtain data on sociodemographic and clinical characteristics and characteristics associated with the use of prostheses. RESULTS: 215 patients were included, 93.9% of congenital and 6.1% of acquired etiology. The most common level of deficiency was partial hand with 51.6%, followed by transradial with 33.1%. 33% of the 215 patients included had a prescription for a prosthesis. 78.9% of the patients with a prosthesis prescription had a mechanical prosthesis and 18.3% had a 3D prosthesis. 53.5% used their prosthesis and 46.4% did not use it. 84.6% of the patients with 3D prostheses did not use them and an 83.3% of the patients with a partial hand level deficiency did not use their prosthesis. CONCLUSION: This study provides data of clinical importance, highlighting an early-onset prosthetic prescription associated with the clinical characteristics of the patients. Likewise, there is a high rate of non-use of 3D prostheses at the partial hand level.

Descripción anatómica del abordaje anterior de cadera: seguridad y efecto para artroplastía total / Anatomical description of the anterior hip approach: safety and effect for total arthroplasty

Resumen: Introducción: El abordaje anterior de cadera fue descrito en 1881, desde entonces se han realizado diversos estudios que han demostrado ventajas significativas frente a los abordajes posterior y lateral directo de cadera. Material y método: Se llevó a cabo un estudio descriptivo con casos continuos no probabilísticos en el Instituto de Ciencias Forenses de Octubre de 2015 a Julio de 2017. Se describió anatomía y distancias a los paquetes vasculonerviosos. Se realizó correlación de Pearson y Rho de Spearman. Resultados: Se efectuaron 22 disecciones, el nervio femorocutáneo fue identificado en nueve especímenes, la distancia promedio del nervio femorocutáneo lateral al intervalo de Smith-Petersen fue 11.4 mm, se identificó la arteria circunfleja lateral ascendente debajo del recto femoral hacia la región central del abordaje, se colocaron los separadores alrededor de la articulación coxofemoral sin lesionar estructuras vitales, el separador más riesgoso se ubicó en la pared anterior del acetábulo, debajo del músculo iliopsoas con distancia promedio de 28.25 mm al paquete femoral. A mayor edad mayor distancia a los paquetes neurovasculares p < 0.05. Conclusiones: Alto nivel de seguridad del abordaje anterior para artroplastía de cadera, las distancias a estructuras vitales presentan un margen razonable, en artroplastía de cadera ofrece adecuada exposición de la articulación, visión directa del acetábulo y disección quirúrgica atraumática.

Abstract: Introduction: The anterior hip approach was described since 1881, since then several studies have been conducted that have shown significant advantages over the posterior and lateral direct approaches of the hip. Material and method: We conducted a descriptive study with continuous non-probabilistic cases at the Institute of Forensic Sciences from October 2015 to July 2017. Anatomy and distances were described to the neurovascular bundles. Correlation of Spearman's Pearson and Rho was performed. Results: 22 dissections were made, the Femorocutaneous Nerve was identified in 9 specimens, the average lateral Femorocutaneous Nerve distance at Smith-Petersen interval was 11.4 mm, We identified the Ascending Lateral Circumflex artery under the femoral rectum towards the central region of the approach, the separators could be placed around the coxofemoral joint without injuring vital structures, the riskier separator we place it in the anterior wall of the acetabulum, below the Psoasyland with an average distance 28.25 mm to the femoral package. The older you go, the longer the neurovascular bundles were located p < 0.05. Conclusions: High level of safety of the previous approach for hip replacement, distances to vital structures have a reasonable margin, hip replacement offers adequate joint exposure, direct acetabulum vision and atraumatic surgical dissection.

Advances in the Processing of UHMWPE-TiO2 to Manufacture Medical Prostheses via SPIF.

This research focuses on developing a novel ultra high molecular weight polyethylene (UHMWPE) material reinforced with titanium dioxide (TiO 2 ) nanoparticles for producing craniofacial prostheses via an incremental sheet forming process (SPIF). First, UHMWPE-TiO 2 nanocomposite sheets were produced using incipient wetting and the compression molding process by considering different concentrations of TiO 2 nanoparticles. Then, the influence that the compression molding fabrication process has on the crystallinity and structural properties of the produced sample sheets was investigated. Experimental characterizations via scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), tensile mechanical testing, and live/dead cell viability assays provided data that show an enhancement of the physical, mechanical, and biological properties. Finally, modifications on the nanocomposite material properties due to the SPIF manufacturing processes of a craniofacial prosthesis are addressed.