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Abstract This study aimed to evaluate the contribution of oral and maxillofacial pathology laboratories (OMPLs) in Brazilian public universities to the diagnosis of lip, oral cavity, and oropharyngeal squamous cell carcinoma (SCC). A cross-sectional study was performed using biopsy records from a consortium of sixteen public OMPLs from all regions of Brazil (North, Northeast, Central-West, Southeast, and South). Clinical and demographic data of patients diagnosed with lip, oral cavity, and oropharyngeal SCC between 2010 and 2019 were collected from the patients’ histopathological records. Of the 120,010 oral and maxillofacial biopsies (2010-2019), 6.9% (8,321 cases) were diagnosed as lip (0.8%, 951 cases), oral cavity (4.9%, 5,971 cases), and oropharyngeal (1.2%, 1,399 cases) SCCs. Most cases were from Brazil’s Southeast (64.5%), where six of the OMPLs analyzed are located. The predominant profile of patients with lip and oral cavity SCC was Caucasian men, with a mean age over 60 years, low schooling level, and a previous history of heavy tobacco consumption. In the oropharyngeal group, the majority were non-Caucasian men, with a mean age under 60 years, had a low education level, and were former/current tobacco and alcohol users. According to data from the Brazilian National Cancer Institute, approximately 9.9% of the total lip, oral cavity, and oropharyngeal SCCs reported over the last decade in Brazil may have been diagnosed at the OMPLs included in the current study. Therefore, this data confirms the contribution of public OMPLs with respect to the important diagnostic support they provide to the oral healthcare services extended by the Brazilian Public Health System.

https://doi.org/10.1590/1807-3107bor-2023.vol37.0126

Clinicopathologic analysis of oral dermoid and epidermoid cysts: a Brazilian multicenter study
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CUNHA, John Lennon Silva

; ANDRADE, Allany de Oliveira

; CAVALCANTE, Israel Leal

; BARROS, Caio César da Silva

; SOUSA NETO, Sebastião Silvério de

; BARROS, Joyce Magalhães de

; LEITE, Larissa Sandy da Silva

; FÉLIX, Fernanda Aragão

; TURATTI, Eveline

; CARVALHO, Francisco Samuel Rodrigues

; SOUSA, Sílvia Ferreira de

; MENDONÇA, Elismauro Francisco de

; ANBINDER, Ana Lia

; PIRES, Fábio Ramoa

; ALVES, Pollianna Muniz

; NONAKA, Cassiano Francisco Weege

; ANDRADE, Bruno Augusto Benevenuto de

Brazilian Oral Research

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2023, Volume 37 elocation e107

Abstract: En | Text: En | PDF: En

Abstract Dermoid cysts (DCs) and epidermoid cysts (ECs) are uncommon developmental cysts affecting the oral cavity. This study aims to evaluate patients with oral DCs and ECs and their demographic and clinicopathologic features. A retrospective descriptive cross-sectional study was performed. A total of 105,077 biopsy records of oral and maxillofacial lesions from seven Brazilian oral pathology centers were analyzed. All cases diagnosed as oral DCs and ECs were reviewed, and clinical, demographic, and histopathological data were collected. The series comprised 32 DCs (31.4%) and 70 ECs (68.6%). Most of the DCs occurred on the floor of the mouth (n = 14; 45.2%) of women (n = 17; 53.1%) with a mean age of 34.6 ± 21.6 years. All DCs were lined partially or entirely by stratified squamous epithelium (100%). Chronic inflammatory cells, melanin pigmentation, multinucleated giant cell reaction, and cholesterol clefts were observed in the fibrous capsule . Most of the ECs affected the labial mucosa (n = 20; 31.7%) of men (n = 39; 56.5%) with a mean age of 48.0±19.8 years. Microscopically, most ECs (n = 68; 97.1%) were lined entirely by stratified squamous epithelium. Two cysts (2.9%) showed areas of respiratory metaplasia. Chronic inflammatory cells, melanin pigmentation, multinucleated giant cell reaction, and cholesterol clefts were also observed in the fibrous capsule. Conservative surgical excision was the treatment of choice in all cases. Oral DCs and ECs are uncommon and often clinically misdiagnosed lesions. Clinicians should consider DCs and ECs in the differential diagnosis of soft tissue lesions in the oral cavity, mainly located on the floor of the mouth and labial mucosa.

https://doi.org/10.1590/1807-3107bor-2023.vol37.0107

Clinical features of oral lichen planus and oral lichenoid lesions: an oral pathologist’s perspective
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Netto, Juliana de Noronha Santos

; Pires, Fábio Ramoa

; Costa, Karen Hurtado Andrade

; Fischer, Ricardo Guimarães

Brazilian Dental Journal

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sep 2022, Volume 33 N. 3 Pages 67 - 73

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Os achados clinico-patológicos que caracterizam de forma precisa o líquen plano oral (LPO) e as lesões liquenoides orais (LLO) ainda representam um desafio. O objetivo do presente estudo foi analisar, pela perspectiva do patologista oral, os achados clínicos do LPO e das LLO. Espécimes preenchendo os critérios histológicos para o diagnóstico de LPO e LLO, e também aqueles compatíveis com LPO (LPO-C), foram selecionados e as informações clínicas foram obtidas a partir das requisições laboratoriais. A amostra final foi composta de 221 casos, incluindo 119 LPO (53.8%), 65 LPO-C (29.4%) e 37 LLO (16.7%). As mulheres foram mais acometidas nos três grupos, mas o número de homens acometidos foi maior nas LLO. A média de idade foi menor no LPO (52.3 anos) em comparação com as LLO (57.9 anos) (p=0.020). O envolvimento da mucosa jugal e da língua foi mais frequente no LPO; o envolvimento gingival foi incomum nas LLO. O padrão reticular foi mais frequentemente encontrado no LPO, enquanto a associação dos padrões reticular e atrófico/erosivo/ulcerado foi mais comum no LPO-C e nas LLO (p=0.025). Em conclusão, o gênero e a média de idade dos pacientes, assim como a localização anatômica e a manifestação clínica das LLO são diferentes do LPO, e podem ajudar a melhor caracterizar este grupo de condições. Espécimes diagnosticados como LPO-C mostraram parâmetros clínicos mais próximos ao LPO.

Abstract The clinicopathological features that precisely characterize oral lichen planus (OLP) and oral lichenoid lesions (OLL) still represent a challenge. The aim of the present study was to analyze, from an oral pathologist perspective, the clinical features from OLP and OLL. Specimens fullfilling the histological criteria for OLP and OLL, and also compatible with OLP (OLP-C), were selected and clinical information was retrieved from the laboratory forms. The final sample was composed by 221 cases, including 119 OLP (53.8%), 65 OLP-C (29.4%) and 37 OLL (16.7%). Females were more affected in the three groups, but the number of males was higher in OLL. Mean age was lower in OLP (52.3 years) in comparison with OLL (57.9 years) (p=0.020). Buccal mucosa and tongue involvement was more frequent in OLP; gingival involvement was uncommon in OLL. The reticular pattern was more frequently found in OLP, while the association of reticular and atrophic/erosive/ulcerated patterns was more common in OLP-C and OLL (p=0.025). In conclusion, gender and mean age of the patients, and anatomical location and clinical manifestation of OLL are different from OLP, and could help to better characterize this group of conditions. Specimens diagnosed as OLP-C showed clinical parameters close to OLP.

https://doi.org/10.1590/0103-6440202204426

Expression of epithelial growth factors and of apoptosis-regulating proteins, and presence of CD57+ cells in the development of inflammatory periapical lesions
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Valente, Walter Arthur Silva

; Barrocas, Déborah

; Armada, Luciana

; Pires, Fábio Ramôa

Journal of Applied Oral Science

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2022, Volume 30 elocation e20210413

Abstract: En | Text: En | PDF: En

Abstract The mechanisms that stimulate the proliferation of epithelial cells in inflammatory periapical lesions are not completely understood and the literature suggests that changes in the balance between apoptosis and immunity regulation appear to influence this process. Objective: To evaluate the expression of the epidermal growth factor (EGF), its receptor (EGFR) and of the keratinocyte growth factor (KGF), the presence of CD57+ cells, the epithelial cell proliferation index, and the expression of the Bcl-2 protein in inflammatory periapical lesions (IPL) at different stages of development. Methodology: Our sample was composed of 52 IPLs (22 periapical granulomas - PG - and 30 periapical cysts - PC), divided into three groups: PGs, small PCs, and large PCs. Specimens were processed for histopathologic and immunohistochemical analyses. Sections were evaluated according to the amount of positive staining for each antibody. Results: We found no significant differences among the groups regarding Bcl-2 (p=0.328) and Ki-67 (p>0.05) expression or the presence of CD57+ cells (p=0.748). EGF (p=0.0001) and KGF (p=0.0001) expression was more frequent in PCs than in PGs, and CD57+ cells were more frequent in IPLs with intense inflammatory infiltrates (p=0.0001). We found no significant differences in KGF (p=0.423), Bcl-2 (p=0.943), and EGF (p=0.53) expression in relation to inflammatory infiltrates or to the type of PC epithelial lining, but observed greater KGF expression (p=0.0001) in initial PCs. EGFR expression was similar among the groups (p>0.05). Conclusion: More frequent EGF and KGF expression in PCs and the greater presence of CD57+ cells in lesions with intense inflammatory infiltrates suggest that these factors influence IPL development. The greater KGF expression in initial PCs suggests its importance for the initial stages of PC formation.

https://doi.org/10.1590/1678-7757-2021-0413

Rainfall erosivity estimation: Comparison and statistical assessment among methods using data from Southeastern Brazil
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Cardoso, Dione Pereira

; Avanzi, Junior Cesar

; Ferreira, Daniel Furtado

; Acuña-Guzman, Salvador Francisco

; Silva, Marx Leandro Naves

; Pires, Fábio Ribeiro

; Curi, Nilton

Revista Brasileira de Ciência do Solo

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2022, Volume 46 elocation e0210122

Abstract: En | Text: En | PDF: En

ABSTRACT Rainfall erosivity (R factor) is one of the six factors of the Universal Soil Loss Equation, being calculated based on the product of rainfall kinetic energy multiplied by its 30-minute maximum intensity. However, the lack of detailed and reliable rainfall data in many parts of the world has driven the use of other methods to estimate rainfall erosivity based on daily, monthly or annual data. These methods still need to be assessed to determine if their estimates are consistent with the standard method for calculating rainfall erosivity. This study aimed to select a consistent method for such replacement in Brazilian conditions without access the rainfall intensity data. The tested methods included: modified Fournier, MF; modified Fournier by Zhang, MF-Z; modified Fournier by Men, MF-M; Rainfall Disaggregation, RD; TRMM Satellite with modified Fournier coefficient, TRMM-F; and TRMM Satellite with monthly rainfall, TRMM-M. The rainfall data were obtained from the USP Meteorological Station, referring to the period from 2009 to 2015. The analyses were performed according to the Additive Main effects and Multiplicative Interaction (AMMI) model and Scott-Knott statistical tests. Considering the 1:1 line, all methods had a good adjustment, presenting similar behavior in relation to the standard method. The methods behaved differently for monthly and annual periods. The MF method proved to be capable of consistently replacing the standard method in all aforementioned situations. Considering the driest period, any method can be used. For annual rainfall erosivity estimation, the RD, MF, TRMM-F and TRMM-M methods can be applied; highlighting that the TRMM-based methods are optimal for locations without on-site rain gauges. Additionally, it was computed that the modified Fournier by Men and the modified Fournier by Zhang underestimated and overestimated the rainfall erosivity, respectively.

https://doi.org/10.36783/18069657rbcs20210122

Performance of cover crops under two irrigation regimes in the Coastal Tablelands region of Brazil
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Nicole, Lucas Rodrigues

; Cardoso, Dione Pereira

; Pires, Fábio Ribeiro

; Bonomo, Robson

; Netto, Benedicto Barbosa

; Belo, Alessandra Ferreira

Revista Ceres

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aug 2021, Volume 68 N. 4 Pages 301 - 309

Abstract: En | Text: En | PDF: En

ABSTRACT There is currently a lack of information regarding the performance of cover crops grown in the Coastal Tablelands region in the North of the Brazilian state of Espírito Santo, where zero tillage is increasingly being adopted. The objective of this study was to evaluate the agronomic performance of six cover crops (ruzi grass, jack bean, and the millets ADR 300, ADR 500, ADRf 6010, and BRS 1501) under two irrigation regimes. A field experiment setup was based on randomized blocks with split plots and four repetitions. Shoot dry matter content, plant height, leaf area, chlorophyll fluorescence, and root growth of the cover crops were evaluated. The irrigation regime influences the agronomic performance of most of the cover crops, with the exception of jack bean and ADRf 6010 millet, which were tolerant to water deficiency, based on our evaluations of the variables shoot dry matter, plant height, and leaf area. In terms of biomass production, ADRf 6010 millet is the most suitable crop for use in conservation systems under conditions of water stress in this region.

https://doi.org/10.1590/0034-737x202168040007 20 downloads

Large calcifying odontogenic cyst in the posterior maxilla
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Santana, Lucas A. M.

; Felix, Fernanda A.

; Ayres, Lucas G. C.

; Silva, Erika R.

; Takeshita, Wilton M.

; Barros, Hugo Leonardo M.

; Silveira, Henrique M.

; Pires, Fábio R.

Jornal Brasileiro de Patologia e Medicina Laboratorial

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2021, Volume 57 elocation e3062021

Abstract: Pt En Es | Text: Pt En Es | PDF: Pt | PDF: En | PDF: Es

RESUMEN La aparición de un quiste odontogénico calcificante (QOC) en la región posterior de la maxila es infrecuente; hay pocos informes descritos en la literatura. Presentamos el caso de una paciente de 13 años que presentó una lesión extensa en la maxila izquierda (> 7,5 cm). La radiografía panorámica mostró una lesión radiolúcida unilocular bien delimitada, que se extendía desde el maxilar posterior izquierdo hasta el seno maxilar. La paciente fue sometida a descompresión, seguida de de la extirpación quirúrgica conservadora de la lesión. El análisis histológico de la pieza quirúrgica confirmó el diagnóstico de QOC. Después de un año, no se observaron recurrencias. La paciente permanece en seguimiento regular.

https://doi.org/10.5935/1676-2444.20210044 1 downloads

Clinical and Research Activities of the Brazilian Productivity Fellows in Oral Medicine and Oral Pathology during the COVID-19 Era
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Martelli, Alison José

; Machado, Renato Assis

; Martelli, Daniella Reis Barbosa

; Cruz Perez, Danyel Elias da

; Pires, Fábio Ramôa

; Martelli Júnior, Hercílio

Pesquisa Brasileira em Odontopediatria e Clínica Integrada

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2021, Volume 21 elocation e210018

Abstract: En | Text: En | PDF: En

ABSTRACT Objective To evaluate the effect of the COVID-19 impacts on the activities of researchers in the field of Oral Medicine (OM) and Oral Pathology (OP). To assess the research activities and training of human resources by Brazilian productivity fellows in research (BPFR) in OM and OP in the COVID-19 Era. Material and Methods Thirty-six BPFR in OM and OP areas, funded by National Council for Scientific and Technological Development (CNPq), received a virtual structured questionnaire by e-mail, on the Google Forms (Google®) platform, with questions regarding research activities and training of human resources (supervision of undergraduate and postgraduate students), during the COVID-19 pandemic. From the thirty-six BPFR in OM and OP, twenty-seven (75.0%) answered the questionnaire. Results Most of them were males (n=20; 74.1%) and were distributed in four Brazilian regions and ten states of the federation, including the Federal District. Twenty-four (88.9%) BPFR reported having suspended clinical activities, while sixteen (59.3%) answered that histopathology practices are suspended. Twenty-five (92.6%) BPFR mentioned difficulties in conducting research projects and 55.5% stated having no difficulties in the supervision of undergraduates, master’s and PhD students. Conclusion The current scenario may significantly impact the diagnosis of oral diseases in Brazil. Moreover, a decrease in the scientific production of BPFR in OM and OP in the coming years is also considered.

https://doi.org/10.1590/pboci.2021.160

Different Patterns Of Nutrient Cycling In Contiguous Phytophysiognomies Of Atlantic Forest, Brazil
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Menezes, Luis Fernando Tavares de

; Souza, Rodrigo Camara de

; Pereira, Marcos Gervasio

; Pires, Fábio Ribeiro

; Fanticelle, Bruno Santanna

; Araujo-Filho, Paulo Batista

Floresta e Ambiente

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2020, Volume 27 N. 1 elocation e20190045

Abstract: En | Text: En | PDF: En

ABSTRACT The present study aimed to evaluate fine aboveground litterfall, deposition of nitrogen and phosphorus from total litterfall and leaf litter decomposition in areas of tall forest (Mata Alta) and low forest on sandy soils (Mussununga) in southeastern Brazil. Fine litterfall was collected monthly for two years (from June/2007 to May/2009) in 10 conical collectors (0.25 m2) in each phytophysiognomy (1 ha plots). The material was subsequently separated into leaves, branches, flowers and fruits, and unidentified material. Leaf decomposition rates were evaluated using 15 litterbags, three of which were collected every 30 days. Higher litterfall occurred in both phytophysiognomies during the rainy season, with leaves predominating. The lowest litterfall, nutrient input, and leaf litter decomposition values appeared to be nutrient conservation strategies, contributing to the ecological functioning of the Mussununga where soil fertility was lower than in the Mata Alta.

https://doi.org/10.1590/2179-8087.004519 671 downloads

10.

Pro-inflammatory and anti-inflammatory cytokine expression in post-treatment apical periodontitis
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Dessaune Neto, Nilton

; Porpino, Mariana Teixeira Maneschy

; Antunes, Henrique dos Santos

; Rodrigues, Renata Costa Val

; Perez, Alejandro Ron

; Pires, Fábio Ramôa

; Siqueira Jr, José Freitas

; Armada, Luciana

Journal of Applied Oral Science

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2018, Volume 26 elocation e20170455

Abstract: En | Text: En | PDF: En

Abstract Objective: This study evaluated the expression of pro-inflammatory (IL-1β, IL-6, IFN-γ and TNF-α) and anti-inflammatory (IL-4 and TGF-β) cytokines in apical periodontitis lesions. Correlations between these cytokines and clinical and cone-beam computed tomographic (CBCT) data were also assessed. Material and Methods: Apical periodontitis lesions’ data were obtained from 27 patients subjected to periradicular surgery. Specimens were processed for histopathologic and immunohistochemical analysis. Sections were evaluated according to the amount of positive staining for each antibody. Expression levels of the target mediators were compared with clinical and CBCT data. Results: Twenty lesions were diagnosed as granuloma and 7 as cyst. In granulomas, IL-4 expression was significantly higher than IL-6 (p=0.001) and TNF-α (p=0.001). There was a significant relationship between high levels of TNF-α and lesions <5 mm (p=0.017). In cysts, IL-6 expression was significant lower than IL-4 (p=0.001) and IFN-γ (p=0.004). There was a significant relationship between high levels of TGF-β and endodontic treatment performed ≤4 years before (p=0.045). In general, IL-4 was the most expressed mediator in both cysts and granulomas. Conclusions: There was a balance between the expression of pro-inflammatory and anti-inflammatory cytokines associated with the chronic periradicular inflammatory process. TNF-α and TGF-β were related to some clinical and CBCT data.

https://doi.org/10.1590/1678-7757-2017-0455 2201 downloads

11.

Efeito da densidade populacional de Canavalia ensiformis na fitorremediação de solo contaminado com sulfentrazone
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Ferraço, Mariana

; Pires, Fábio Ribeiro

; Belo, Alessandra Ferreira

; Celin Filho, Ademar

; Bonomo, Robson

Revista Ciência Agronômica

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mar 2017, Volume 48 N. 1 Pages 32 - 40

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Existem poucas informações quanto à fitorremediação do herbicida sulfentrazone, reforçando assim a necessidade de pesquisas que visam oferecer alternativas seguras para sua utilização em sistemas que integram a sucessão/rotação de culturas, focando a sustentabilidade da produção agrícola, sem prejuízos ao sistema produtivo e ao ambiente. Com isso, objetivou-se neste trabalho avaliar a influência da densidade populacional de Canavalia ensiformis sobre a fitorremediação de solo contaminado com o herbicida sulfentrazone. O experimento constou de um fatorial 4 x 3, no delineamento inteiramente casualizado, com quatro repetições. O primeiro fator foi constituído pela combinação de quatro densidades populacionais da espécie fitorremediadora C. ensiformis (0; 10; 20 e 40 plantas m-2) e o segundo por três doses do herbicida sulfentrazone (0; 200 e 400 g ha-1). Aos 75 dias após a emergência, as plantas foram cortadas na altura do coleto. Nesse mesmo período, efetuou-se, no próprio vaso, a semeadura da espécie bioindicadora da presença do sulfentrazone, milheto (Pennisetum glaucum), na qual foram avaliadas a fitotoxicidade, a altura e a biomassa fresca e seca da parte aérea e da raiz. O cultivo prévio da espécie fitorremediadora C. ensiformis promoveu a remediação do solo contaminado com sulfentrazone. A densidade populacional mínima de C. ensiformis que possibilita o desenvolvimento do milheto é de 10 plantas m-2. Todavia, melhores resultados foram obtidos na densidade de 40 plantas m-2.

ABSTRACT There is little information on the phytoremediation of the herbicide sulfentrazone. This reinforces the need for research aimed at providing safe alternatives to its use in systems that integrate crop succession or rotation, focusing on the sustainability of agricultural production, and without harming the production system or the environment. The aim of this study therefore, was to evaluate the influence of population density in Canavalia ensiformis on the phytoremediation of soil contaminated with the herbicide sulfentrazone. The experiment consisted of a 4 x 3 factorial in a completely randomised design with four replications. The first factor comprised a combination of four population densities of the species C. ensiformis, used in phytoremediation, (0, 10, 20 and 40 plants m-2), and the second of three doses of the herbicide sulfentrazone (0, 200 and 400 g ha-1). At 75 days after emergence, the plants were cut level with the collar. At the same time, pearl millet (Pennisetum glaucum), a bioindicator species for sulfentrazone, was planted in each pot, and the phytotoxicity was evaluated together with the height, and fresh and dry shoot and root biomass. Earlier cultivation of the species, C. ensiformis, helped remediation of soil contaminated with sulfentrazone. The minimum population density of C. ensiformis which allows millet to develop is 10 plants m-2; however, better results were obtained at a density of 40 plants m-2.

https://doi.org/10.5935/1806-6690.20170004 1592 downloads

12.

Histologic and Tomographic Findings of Bone Block Allografts in a 4 Years Follow-up: A Case Series
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Deluiz, Daniel

; Oliveira, Luciano Santos

; Fletcher, Paul

; Pires, Fábio Ramôa

; Tinoco, Justine Monnerat

; Tinoco, Eduardo Muniz Barretto

Brazilian Dental Journal

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dec 2016, Volume 27 N. 6 Pages 775 - 780

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O objetivo deste artigo é relatar achados histológicos e tomográficos de aloenxertos ósseos em bloco com implantes dentários em oclusão funcional em um acompanhamento de longo prazo. Quatro pacientes com implantes funcionalmente carregados por 4 anos em rebordos alveolares enxertados, que necessitaram de cirurgia mucogengival ou instalação de implantes adicionais foram incluídos nesta série de casos. Imagens de tomografia cone-beam foram comparados volumetricamente entre o momento inicial (instalação do implante original) e imagens atuais. Biópsias dos enxertos foram coletadas e enviadas para análise histológica. A redução volumétrica dos enxertos variou entre 2,1-7,7%. A avaliação histológica demonstrou enxertos bem incorporados com diferentes graus de remodelação. Embora os dados apresentados neste relato sejam de uma amostra pequena e não permitam conclusões definitivas, as biópsias dos sítios enxertados apresentaram características muito similares ao osso nativo. A remodelação da porção cortical dos aloenxertos parece levar mais tempo do que a porção esponjosa. A presença de remanescentes do enxerto não incorporado não demonstrou impacto no sucesso dos implantes ou na saúde dos tecidos circunjacentes. Este é o primeiro relato com dados histológicos e tomográficos em longo prazo de enxertos ósseos alógenos disponível na odontologia.

Abstract The aim of this paper is to report histologic and tomographic findings of fresh frozen bone block allografts bearing dental implants in functional occlusion in a long-term follow-up. Four patients with implants functionally loaded for 4 years on augmented ridges requiring additional mucogingival surgery or implant placement were included in this case series. Cone-beam tomography scans were compared volumetrically between the baseline (first implant placement) and current images. Biopsies of the grafts were retrieved and sent to histological analysis. Volumetric reduction of the grafts varied from 2.1 to 7.7%. Histological evaluation demonstrated well-incorporated grafts with different degrees of remodeling. While data presented in this report are from a small sample size and do not allow definitive conclusions, the biopsies of the grafted sites were very similar to the host's native bone. Remodeling of the cortical portion of the allografts seems to take longer than the cancellous portion. The presence of unincorporated graft remains did not impair the implant success or the health of the surrounding tissues. This is the first time histologic and tomographic long term data of bone allograft have been made available in dentistry.

https://doi.org/10.1590/0103-6440201601100 1785 downloads

13.

Determination of homogeneous zones for liming recommendations of black pepper using geostatistics
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Gontijo, Ivoney

; Santos, Eduardo O. de J.

; Partelli, Fábio L.

; Gontijo, Andreia B. P. L.

; Pires, Fábio R.

Revista Brasileira de Engenharia Agrícola e Ambiental

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oct 2016, Volume 20 N. 10 Pages 918 - 924

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivou-se, no presente estudo, caracterizar a variabilidade espacial dos atributos relacionados à acidez do solo, a necessidade de calagem e a produtividade de pimenta-do-reino sob um Latossolo Amarelo. O estudo foi realizado em uma lavoura de pimenta-do-reino, no município de São Mateus, ES. A área experimental possui dimensões de 100 x 120 m na qual demarcou-se uma malha com 126 pontos. Em cada ponto amostral foram coletadas três subamostras de solo na projeção da copa da pimenteira-do-reino compondo uma amostra na profundidade de 0-0,20 m. A produtividade da lavoura foi estimada por meio da colheita das três plantas circunvizinhas a cada ponto amostral. Os resultados obtidos foram submetidos à análise da estatística descritiva e à análise geoestatística. O mapa da necessidade de calagem possibilitou a delimitação das zonas homogêneas de taxas de calcário a serem aplicadas ao solo. Os modelos matemáticos ajustados aos semivariogramas demonstraram que todas as variáveis em estudo apresentaram estrutura de dependência espacial. O conhecimento da variabilidade espacial associada à definição de zonas homogêneas pode ser usado para aumentar a eficiência de aplicação de calcário.

ABSTRACT Studies aimed at determining homogeneous zones and the spatial variability of soil characteristics may improve the efficiency of agricultural input applications. The purpose of this study was to determine homogeneous zones for liming applications and to characterize the spatial variability of characteristics related to soil acidity and productivity in an Oxisol cultivated with black pepper (Piper nigrum L.). This study was carried out in São Mateus, state of Espírito Santo, Brazil. The experimental site was 100 x 120 m. A grid with 126 sampling points was established. Three soil sub-samples were collected at each sampling point in the black pepper canopy areas, at a 0-0.20 m depth. Crop productivity was estimated by harvesting the three plants neighboring each sampling point. Descriptive statistics and geostatistical analyses were performed. Homogeneous management zones were defined based on map of liming needs. Mathematical models adjusted to semivariograms indicated that all of the studied variables exhibited spatial dependency. An analysis of the spatial variability together with the definition of homogeneous zones can be used to increase the efficiency of soil liming.

https://doi.org/10.1590/1807-1929/agriambi.v20n10p918-924 1054 downloads

14.

SULFENTRAZONE PHYTOREMEDIATION UNDER FIELD CONDITIONS
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BELO, ALESSANDRA FERREIRA

; PIRES, FÁBIO RIBEIRO

; BONOMO, ROBSON

; CARGNELUTTI FILHO, ALBERTO

; TENIS, LUIS HENRIQUE ORTELAN

Revista Caatinga

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mar 2016, Volume 29 N. 1 Pages 119 - 126

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: A fitorremediação é uma técnica que vem sendo utilizada na descontaminação de solos tratados com herbicidas de longo efeito residual devido à sua eficiência na descontaminação. Objetivou-se avaliar a fitorremediação do herbicida sulfentrazone em campo, pelas espécies Canavalia ensiformis e Crotalaria juncea. Os tratamentos foram compostos pela combinação entre as espécies vegetais C. ensiformis e C. juncea, mais um tratamento controle (com capina manual) e quatro doses do herbicida sulfentrazone. O delineamento experimental foi blocos casualizados com parcelas subdivididas, com quatro repetições. As espécies fitorremediadoras foram mantidas no campo por 75 dias. Neste mesmo período, foi mantido o tratamento controle. Após esse período, a área experimental foi novamente sulcada e fertilizada considerando as necessidades do Pennisetum glaucum, planta utilizada como indicadora da presença de sulfentrazone. Aos 34 dias após a semeadura do P. glaucum, avaliaram-se a massa fresca e seca da parte aérea. Ao final do ciclo, determinaram-se altura, diâmetro do colmo, comprimento do entre nó, número de folhas, número de panículas, massa fresca e seca da panícula. O cultivo prévio das espécies fitorremediadoras C. ensiformis e C. juncea promove a remediação do sulfentrazone. C. ensiformis é a espécie mais eficiente na descontaminação do herbicida sulfentrazone a campo.

ABSTRACT: Phytoremediation is a technique that has been used with increasing frequency to decontaminate soils treated with herbicides that have long-term residual effects, such as sulfentrazone. The goal was to assess phytoremediation of the herbicide sulfentrazone under field conditions by the species Canavalia ensiformis and Crotalaria juncea. The treatments consisted of combinations of the plant species C. ensiformis and C. juncea plus a control treatment (with manual weeding) and four doses of the herbicide sulfentrazone. The experimental design used herein was a split-plot randomized block design with four replicates per subplot. The treatments were kept in the field for 75 days. After this period, the experimental area was again furrowed and fertilized, considering the requirements for Pennisetum glaucum, a plant used as an indicator of the presence of sulfentrazone. Thirty-four days after sowing pearl millet, the fresh and dry shoot masses of the plants were assessed. At the end of the cycle, the plant height, stem diameter, internode length, number of leaves, number of panicles, and fresh and dry panicle masses were determined. Previous cultivation of phytoremediation species C. ensiformis and C. juncea promotes sulfentrazone remediation. C. ensiformis is the most efficient species for the decontamination of the herbicide sulfentrazone under field conditions.

https://doi.org/10.1590/1983-21252016v29n114rc 1169 downloads

15.

CARACTERIZAÇÃO DE VERMICOMPOSTO PRODUZIDO COM PALHA DE CAFÉ E ESTERCO BOVINO
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NASCIMENTO, ALEX FAVARO

; PIRES, FÁBIO RIBEIRO

; CZEPAK, MARCIO PAULO

; FERNANDES, ADRIANO ALVES

; RODRIGUES, JOSÉ DE OLIVEIRA

Revista Caatinga

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dec 2015, Volume 28 N. 4 Pages 1 - 9

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: Apesar do conhecimento que se tem sobre os benefícios do húmus de minhoca ou vermicomposto há necessidade de se avaliar a viabilidade técnica de utilização de outras fontes de carbono para as minhocas. O objetivo do trabalho foi avaliar o efeito da palha de café associada ao esterco bovino para produção de vermicomposto sobre as minhocas e a qualidade do húmus obtido. Os tratamentos foram constituídos de: 1) Esterco Bovino 100%; 2) Palha de Café 25% + Esterco Bovino 75%; 3) Palha de Café 50% + Esterco Bovino 50%; 4) Palha de Café 75% + Esterco Bovino 25%; e 5) Palha de Café 100%. A palha de café e o esterco permaneceram incubados por 64 dias para que ficassem disponíveis para a alimentação das minhocas e mais 84 dias para digestão do substrato. A palha de café não interferiu no incremento populacional das minhocas. O aumento percentual da palha na constituição do vermicomposto aumentou a disponibilidade de N, K, Ca e Cu, mas reduziu em P, Mg, S, Mn, Fe e Zn. Visando o fornecimento médio de nutrientes, a proporção de 50% de palha de café e 50% de esterco de bovino é a mais indicada.

ABSTRACT: Despite the knowledge that you have about the benefits of the humus of the worms or vermicompost, there is a need to evaluate the technical feasibility of using other sources of carbon for worms. The objective was to evaluate the possibility of using straw of coffee to vermicompost production, the effects of their use on worms and on the quality of humus obtained. The evaluated treatments consisted of: (1 straw of coffee (SC) 100%; 2 SC 75% + manure (MA); 3 50% SC + 50% MA; 4 25% SC + 75% MA; 5 100% MA). The straw of coffee and the manure were incubated for 64 days to make them available to feed the worms and more 84 days to digest the substrate. The straw of coffee increased the number of worms without resulting in harmful effects. The percentage increment of the straw in the constitution of the vermicompost increased the availability of N, K, Ca and Cu, but it reduced the availability of Mg, S, Mn, P, Fe and Zn. Aiming o the medium supply of nutrients, the proportion of the 50% of straw of coffee and 50% of manure is designated.

https://doi.org/10.1590/1983-21252015v28n401rc 3655 downloads

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