74 research outputs found
Efficacy of eminectomy in the treatment of prolonged mandibular dislocation
Surgery of the temporomandibular joint is indicated for different clinical situations, including internal derangements, hipomobility, hipermobility, pathology and trauma. Mandibular dislocation is an acute painful condition that causes severe functional limitation. Manual reduction, with or without pharmacological assistance, is the treatment of choice and should be performed as early as possible. On rare situations mandibular dislocation may not be perceived by the patient and remain undiagnosed or misdiagnosed for a long period. This may include severe illness, neurological diseases and prolonged intensive care hospitalization with oral intubation and sedation. Treatment of prolonged mandibular dislocation is different. Morphological changes of the joint and associated structures will prevent successful manual reduction even with the patient under general anesthesia. Basically, two types of surgery may be indicated: elimination of the articular eminence (eminectomy) or reestablishment of a new condyle - ramus relationship, that can be achieved by condilotomy. This article reports a case of prolonged mandibular dislocation that was treated surgically with success. A review of the literature is performed by authors and advantages and disadvantages of each type of treatment are discussed
Photography-based taxonomy is inadequate, unnecessary, and potentially harmful for biological sciences
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported
by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per the editorial rules of Nature) was submitted to Nature, which on
18 October 2016 refused to publish it. As we think this problem is a very important one for zoological taxonomy, this text is published here exactly as submitted to Nature, followed by the list of the 493 taxonomists and collection-based
researchers who signed it in the short time span from 20 September to 6 October 2016
Pervasive gaps in Amazonian ecological research
Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4
While the increasing availability of global databases on ecological communities has advanced our knowledge
of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In
the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of
Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus
crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced
environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian
Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by
2050. This means that unless we take immediate action, we will not be able to establish their current status,
much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio
Worldwide trends in underweight and obesity from 1990 to 2022: a pooled analysis of 3663 population-representative studies with 222 million children, adolescents, and adults
Background Underweight and obesity are associated with adverse health outcomes throughout the life course. We
estimated the individual and combined prevalence of underweight or thinness and obesity, and their changes, from
1990 to 2022 for adults and school-aged children and adolescents in 200 countries and territories.
Methods We used data from 3663 population-based studies with 222 million participants that measured height and
weight in representative samples of the general population. We used a Bayesian hierarchical model to estimate
trends in the prevalence of different BMI categories, separately for adults (age ≥20 years) and school-aged children
and adolescents (age 5–19 years), from 1990 to 2022 for 200 countries and territories. For adults, we report the
individual and combined prevalence of underweight (BMI <18·5 kg/m2) and obesity (BMI ≥30 kg/m2). For schoolaged children and adolescents, we report thinness (BMI <2 SD below the median of the WHO growth reference)
and obesity (BMI >2 SD above the median).
Findings From 1990 to 2022, the combined prevalence of underweight and obesity in adults decreased in
11 countries (6%) for women and 17 (9%) for men with a posterior probability of at least 0·80 that the observed
changes were true decreases. The combined prevalence increased in 162 countries (81%) for women and
140 countries (70%) for men with a posterior probability of at least 0·80. In 2022, the combined prevalence of
underweight and obesity was highest in island nations in the Caribbean and Polynesia and Micronesia, and
countries in the Middle East and north Africa. Obesity prevalence was higher than underweight with posterior
probability of at least 0·80 in 177 countries (89%) for women and 145 (73%) for men in 2022, whereas the converse
was true in 16 countries (8%) for women, and 39 (20%) for men. From 1990 to 2022, the combined prevalence of
thinness and obesity decreased among girls in five countries (3%) and among boys in 15 countries (8%) with a
posterior probability of at least 0·80, and increased among girls in 140 countries (70%) and boys in 137 countries (69%)
with a posterior probability of at least 0·80. The countries with highest combined prevalence of thinness and
obesity in school-aged children and adolescents in 2022 were in Polynesia and Micronesia and the Caribbean for
both sexes, and Chile and Qatar for boys. Combined prevalence was also high in some countries in south Asia, such
as India and Pakistan, where thinness remained prevalent despite having declined. In 2022, obesity in school-aged
children and adolescents was more prevalent than thinness with a posterior probability of at least 0·80 among girls
in 133 countries (67%) and boys in 125 countries (63%), whereas the converse was true in 35 countries (18%) and
42 countries (21%), respectively. In almost all countries for both adults and school-aged children and adolescents,
the increases in double burden were driven by increases in obesity, and decreases in double burden by declining
underweight or thinness.
Interpretation The combined burden of underweight and obesity has increased in most countries, driven by an
increase in obesity, while underweight and thinness remain prevalent in south Asia and parts of Africa. A healthy
nutrition transition that enhances access to nutritious foods is needed to address the remaining burden of
underweight while curbing and reversing the increase in obesit
Pervasive gaps in Amazonian ecological research
Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost
Pervasive gaps in Amazonian ecological research
Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost
Analise facial e cefalometrica comparativa de mulheres com harmonia facial
Orientador: Mario Francisco R. GabrielliTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: Foram avaliadas 2'0 mulheres leucodermas, brasileiras, com harmonia facial, modelos profissionais, que receberam análise facial conforme descrita por STELLA (1996) e PASSERI (1999). Por meio de
telerradiografias tomadas em norma lateral, as análises cefalométricas de LEGAN & BURSTONE (1980) e MCNAMARA JR (1984) foram aplicadas. Os resultados obtidos foram tabulados, analisados estatisticamente e comparados com os valores originais descritos nas análises empregadas, permitindo concluir que: 1) apesar dos diferentes aspectos faciais e oclusais da amostra, as proporções
verticais da face guardaram relação de 1/1/1, entre os três terços faciais, em média; 2) a análise facial revelou, nas mulheres estudadas, menores dimensões transversais do terço médio da face, com
diferença estatisticamente significativa, em relação à literatura; 3) as medidas cefalométricas relativas aos dois terços inferiores do terço inferior da face, na análise de LEGAN & BURSTONE (1980), que
refletem a posição do incisivo inferior e do lábio inferior apresentaram se estatisticamente diferentes dos valores descritos pelos autores; 4) para as medidas ósseas apresentadas por MCNAMARA JR (1984),
que são as comumente utilizadas no plamejamento ortodôntico cirúrgico, não houve diferenças estatisticamente significativas em relação aos valores obtidos para a amostra considerada; 5) a
variabilidade para as proporções consideradas na análise facial foi em , geral menor que para as medidas isoladas; 6) o valor médio do ângulo nasolabial para a amostra estudada foi de 107,8°; 7) a expostção
média radiográfica do incisivo central superior foi de 4,15 mm. O valor , médio obtido clinicamente foi de 0,87 mm, em repouso, e 9,05, 'fllmAbstract: Twenty white Brazillian females, professional models presenting good facial balance, were studied by means of facial analysis, as described by STELLA (1996) and PASSERI (1999). The cephalometric
analysis of LEGAN & BURSTONE (1980) and MCNAMARA JR (1984) , isolated measurements for the facial analysis; 6) the mean value for were applied to lateral cephalograms. Results were statistically
analyzed and compared with the original values as described for the considered methods, allowing the following conclusions: 1) facial proportions were 1/1/1 for the three facial thirds; 2) facial analysis
revealed smaller transverse values for the middle third horizontal measurements with statistically significant differences in relation to the literature; 3) measurements relative to the two inferior thirds of the
lower facial third, which reflected the position of the inferior incisor and lower lip, were statistically different from those described by LEGAN & BURSTONE (1980); 4) the MCNAMARA JR analysis (1984) values
presented no statistically significant differences from those described by the author; 5) facial proportions were less variable than absolut the nasolabial angle was 107,8°; 7) Mean radiographic upper incisor
exposure was 4,15 mm. The mean clinical measurement was 0,87 mm n repose and 9,05 mm in smilingDoutoradoCirurgia Buco-Maxilo-FacialDoutor em Clínica Odontológic
Efeito da sutura V-Y duplo, associada a sutura das bases alares, sobre o labio superior, apos o reposicionamento superior da maxila : estudo cefalometrico comparativo
Orientador: Mario Francisco Real GabrielliDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: presente estudo avaliou o efeito de duas técnicas diferentes de suturas na morfologia do lábio superior após reposição da maxila. Quatorze pacientes foram estudados, divididos em dois
grupos. Sutura circunvestibular e sutura das bases alares foram utilizadas no grupo I e sutura em duplo V- Y e sutura das bases alares foram utilizadas no grupo 11. Traçados cefalométricos foram
obtidos do período pré-operatório imediato e de um período pós operatório mínimo de seis meses. Os resultados mostraram que: a) todos os pontos em tecido mole considerados apresentaram movimentação superior nos dois grupos; b) o ângulo nasolabial não foi afetado pelo tipo de sutura; c) a sutura em duplo V- Y resultou em um aumento estatisticamente significante na exposição do vermelhão do lábio
supenorAbstract: The present study evaluated the effects of two different suture techniques on upper lip morphology after superior repositioning of the maxilla. Fourteen patients were studied, divided into two
groups. Circumvestibular sutures and alar base sutures were used in group I and double V-V closures and alar base sutures were used in group 11. Cephalometric tracings were obtained of the immediate preoperative period and of a minimum postoperative period of six months. The results of this study showed that: a) ali considered soft tissue points presented movement in a superior direction in both
groups; b) the nasolabial angle was not affected by the type of closure; c) double V- Y closures resulted in a statiscally significant increase in upper lip vermillion exposureMestradoCirurgia Buco-Maxilo-FacialMestre em Clínica Odontológic
Prospective study of postoperative sensory disturbances after surgical treatment of mandibular fractures
Introduction: This present study's purpose is to evaluate the degree of paresthesia and recovery of inferior alveolar nerve in patients with mandible fractures who underwent surgical treatment. Material and methods: Nineteen patients were evaluated (27 hemimandibles) at six different times: preoperative (T1), postoperative 1 week (T2), postoperative 1 month (T3), postoperative 3 months (T4), postoperative 6 months (T5), and postoperative 1 year (T6). Subjective and objective methods were used for this evaluation. Results: The results were analyzed using likelihood ratio chi-square test for the hypothesis of no association between indicators of sensitivity and responses to the questionnaire, and the Cochran-Mantel-Haenszel test for equality hypothesis. All objective tests showed a statistically significant worsening in sensitivity at T2 (p < 0. 0001) and a significant improvement after T4 (α < 0. 05). The subjective tests showed an association with the objectives tests, and improvement in sensitivity after T4 (p < 0. 0001) was noted. Discussion: The first postoperative week is the period in which there are major changes with respect to sensitivity, and after 3 months postoperatively, the recovery reaches its apex with little difference observed after this period. In this research 100 % of the patients analyzed recovered all sensibility until T6. © 2012 Springer-Verlag
Importance Of Occlusal Plane Reproduction On The Semi-adjustable Articulator In Planning Maxillary Impactions For Orthognathic Surgery.
The aim of this study was to evaluate whether a 6° counterclockwise change in occlusal plane inclination would produce significant modifications on the final result of a maxillary impaction and mandible advancement model surgery. Four groups were used in this study, with ten identical maxillary casts and one mandibular cast mounted on the same semi-adjustable articulator, with the same malocclusion. The occlusal plane of the two control and study groups had an inclination of 13° and 7°, respectively. Preoperative and postoperative measures were performed using the Erickson platform and impactions of 6 and 10 mm were tested. To control these movements during model surgery, two splints were fabricated using another two maxillary and mandibular casts mounted with occlusal plane of 13°, simulating the proposed movement. The results were compared using the t test. Only the antero-posterior movement of the upper incisor was statistically significant for both study groups (p < 0.05), with a mean of 0.48 and 0.94 mm in the 10 and 6 mm impaction groups, respectively. This information means that if an error in the occlusal plane transference occur, it will not be clinically significant, because differences smaller than 1 mm does not have influence on soft and hard tissue final result.17109-1
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