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Id: biblio-828952
Autor: Tatlisumak, Ertugrul; Yoleri, Levent.
Título: True retaining ligaments of face as surgical landmarks / Los verdaderos ligamentos de retención de la cara como marcadores quirúrgicos
Fuente: Int. j. morphol;34(3):854-859, Sept. 2016. ilus.
Idioma: en.
Resumen: The adherence of the overlying tissues to the underlying structures in the face is maintained by the retaining ligaments. True retaining ligaments named orbital, zygomatic and mandibular ligaments are a series of fibrous bands that run from periosteum to the dermis. The tethering effect of true retaining ligaments must be released for achieving a satisfactory movement of facial skin and Superficial Muscular Aponeurotic System (SMAS) during facial rejuvenation procedures. The aim of this study was to define the location of the true retaining ligaments of the face and to discuss their usability as surgical landmarks. The study was made on ten hemi-faces of formaline-fixed cadavers. Dissections resembling face-lift procedures were applied and ligaments were determined. The distances of the ligaments to lateral canthus, tragus and commissure and to the lines from tragus to lateral canthus and commissure were measured. Correlations were investigated statistically. The distances of the zygomatic and mandibular ligaments from the tragus were 66.50±10.78 mm and 114.80±9.76 mm respectively. The distances of the zygomatic ligament from the commissure and the commissure tragus line were 56.30±8.94 mm and 28.40±5.19 mm respectively. The distances of zygomatic and mandibular ligaments from the tragus were strongly correlated with a ratio of 3/5 and there was a strong correlation between the distances of the zygomatic ligament from the commissure and commissure- tragus line with a ratio of 2. The results of this study elucidated the possibility of the use of the true retaining ligaments as surgical landmarks for facial surgery.

La adherencia de los tejidos que recubren a las estructuras subyacentes en la cara se mantiene por los ligamentos de retención. Los ligamentos de retención verdaderos llamados ligamentos orbitales, cigomático y mandibular son una serie de bandas fibrosas que se extienden desde el periostio a la dermis. El efecto de la inmovilización de los verdaderos ligamentos de retención debe ser liberado para lograr un movimiento satisfactorio de la piel del rostro y del SMAS durante los procedimientos de estiramiento facial. El objetivo fue definir la ubicación de los verdaderos ligamentos de retención de la cara para discutir su utilidad como puntos de referencia quirúrgicos. El estudio se realizó sobre diez hemi-caras de cadáveres, fijadas con formalina. Las disecciones se asemejaron a los procedimientos de estiramiento facial, se aplicaron y determinaron los ligamentos. Se midieron las distancias de los ligamentos al canto lateral, trago, comisura y a las líneas de trago a canto lateral y comisura. Las correlaciones fueron analizadas estadísticamente. Las distancias de los ligamentos cigomático y mandibular desde el trago fueron 66,50±10,78 mm y 114,80±9,76 mm, respectivamente. Las distancias del ligamento cigomático a la comisura y la línea de comisura al trago fueron 56,30±8,94 mm y 28,40±5,19 mm, respectivamente. Las distancias de los ligamentos cigomático y mandibular desde el trago estaban correlacionadas de forma importante con una relación de 3/5 y había una fuerte correlación entre las distancias del ligamento cigomático desde la línea de comisura y el trago - con una relación de 2. Los resultados de este estudio han dilucidado la posibilidad de la utilización de los verdaderos ligamentos de retención como puntos de referencia quirúrgicos para la cirugía facial.
Responsable: CL1.1 - Biblioteca Central


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Ribeiro, José Luis Duarte
Silveira, Heloisa Emilia Dias da
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Id: lil-786820
Autor: Delamare, Eduardo Luiz; Liedke, Gabriela Salatino; Vizzotto, Mariana Boessio; Silveira, Heraldo Luis Dias da; Padilha, Dalva Maria Pereira; Ribeiro, José Luís Duarte; Silveira, Priscila Fernanda da; Silveira, Heloisa Emilia Dias da.
Título: Impact of landmark identification and standard measurement error on cephalometric analysis using a mathematical simulation model / Impacto da identificação do ponto anatômico e do erro padrão de mensuração na análise cefalométrica utilizando um modelo de simulação matemática
Fuente: Rev. Fac. Odontol. Porto Alegre;53(3):1-5, set.-out. 2012. tab.
Idioma: en.
Resumen: Objective: To assess, using a mathematical simulation model, the participation of each coordinate involved in the formation of cephalometric angles and to determine the extent to which errors in the identification of cephalometric landmarks can, individually and collectively, influence the measurement of these angles. Material and Methods: The reference values and standard errors of 13 landmarks obtained from the analysis of 30 cephalograms were used. For each landmark, 1000 observations were simulated using the Monte Carlo method. On the basis of linear regression models, equations designed to estimate measurement errors due to landmark identification errors were obtained and analysed. Results: The coordinates most involved in the formation of the angles SNA, SNB, ANB, FMA, PPL, DFC, and AEF were Ny, Ny, Ax, Goy, Poy, Poy, and Ptmx, respectively, and the standard measurement errors for these angles were 1.2, 0.9, 0.8, 1.6, 1.5, 1.5, and 1.4, respectively. Conclusion: The standard measurement error of the angle depends on the geometric impact coefficient and the standard error of the coordinates involved in the formation of the angles, and the geometric impact coefficient varies according to the angle analysed.

Objetivos: Avaliar, empregando um modelo matemático de simulação, a participação de cada coordenada envolvida na formação de ângulos cefalométricos, assim como determinar a extensão da influência dos erros na identificação dos pontos cefalométricos, individual e coletivamente, na mensuração destes ângulos. Materiais e métodos: Foram utilizados os valores de referência e os erros padrão de 13 pontos anatômicos obtidos a partir da análise de 30 cefalogramas. Para cada ponto anatômico, foram simuladas 1000 observações utilizando o método de Monte Carlo. Com base em modelos de regressão linear, foram obtidas e analisadas equações destinadas a estimar os erros de medição devido a erros na identificação dos pontos cefalométricos. Resultados: As coordenadas mais envolvidas na formação dos ângulos SNA, SNB, ANB, FMA, PPL, DFC, e AEF foram Ny, Ny, Ax, Goy, Poy, Poy, e Ptmx, respectivamente, e os erros padrão de mensuração destes ângulos foram 1,2; 0,9; 0,8; 1,6; 1,5; 1,5 e 1,4, respectivamente. Conclusões: O erro padrão de mensuração de cada ângulo cefalométrico depende do coeficiente de impacto geométrico e do erro padrão das coordenadas dos pontos anatômicos envolvidos na formação dos mesmos, sendo que o coeficiente de impacto geométrico varia de acordo com o ângulo analisado.
Responsable: BR541.1 - Biblioteca


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Id: lil-777178
Autor: VASCONCELOS, Taruska Ventorini; NEVES, Frederico Sampaio; MORAES, Lívia Almeida Bueno; FREITAS, Deborah Queiroz.
Título: Vertical bone measurements from cone beam computed tomography images using different software packages
Fuente: Braz. oral res. (Online);29(1):1-6, 2015. tab, ilus.
Idioma: en.
Resumen: This article aimed at comparing the accuracy of linear measurement tools of different commercial software packages. Eight fully edentulous dry mandibles were selected for this study. Incisor, canine, premolar, first molar and second molar regions were selected. Cone beam computed tomography (CBCT) images were obtained with i-CAT Next Generation. Linear bone measurements were performed by one observer on the cross-sectional images using three different software packages: XoranCat®, OnDemand3D® and KDIS3D®, all able to assess DICOM images. In addition, 25% of the sample was reevaluated for the purpose of reproducibility. The mandibles were sectioned to obtain the gold standard for each region. Intraclass coefficients (ICC) were calculated to examine the agreement between the two periods of evaluation; the one-way analysis of variance performed with the post-hoc Dunnett test was used to compare each of the software-derived measurements with the gold standard. The ICC values were excellent for all software packages. The least difference between the software-derived measurements and the gold standard was obtained with the OnDemand3D and KDIS3D (-0.11 and -0.14 mm, respectively), and the greatest, with the XoranCAT (+0.25 mm). However, there was no statistical significant difference between the measurements obtained with the different software packages and the gold standard (p> 0.05). In conclusion, linear bone measurements were not influenced by the software package used to reconstruct the image from CBCT DICOM data.
Responsable: BR1.1 - BIREME


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Biffi, Joäo Carlos Gabrielli
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Id: lil-777169
Autor: OLIVEIRA, Maria Antonieta Veloso Carvalho; VENÂNCIO, Jessyca Figueira; RAPOSO, Luís Henrique Araújo; BARBOSA JÚNIOR, Nelson; BIFFI, João Carlos Gabrielli.
Título: Morphometric evaluation and planning of anticurvature filing in roots of maxillary and mandibular molars
Fuente: Braz. oral res. (Online);29(1):1-9, 2015. tab, ilus.
Idioma: en.
Resumen: This study aimed to guide the planning of anticurvature filing using pre-determined anatomical points on teeth to establish directions for proper implementation of the technique. Two hundred digital periapical radiographs of human molar teeth were selected and divided into two groups (n = 100): MX (maxillary) and MD (mandibular) molars. Mesiobuccal roots were considered for the MX group and mesial roots for the MD group. Pre-determined anatomical points required for planning the anticurvature filing on the root canal path were located, and the distances between these points obtained. The anticurvature filing was simulated in two different protocols for each group, and the region of dentin removal and the remaining dentin thickness were measured in the safety and danger zones of the root canals. Statistical analysis was carried out at a significance level of 5%. The distances between the anatomical points and the thickness of remaining dentin showed significant differences when the two groups were compared (p < 0.001). No significant differences were found between the two experimental groups regarding the area of dentin removal at the root region, but differences were detected in comparison with dentin removal at the crown (p < 0.001). In terms of wear produced after simulation of both anticurvature filing protocols, significant differences were verified for all regions, except for the dentin remaining at the danger zone. The radiographic location of anatomical points allows for planning and implementation of controlled and efficient anticurvature filing and can be performed in the same manner for maxillary and mandibular molars.
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Cavalheiro, Sérgio
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Id: lil-762893
Autor: Rodrigues, Thiago; Rodrigues, Mariana; Paz, Daniel; Costa, Marcos Devanir; Santos, Bruno; Braga, Vinicius; Paiva Neto, Manoel de; Centeno, Ricardo; Cavalheiro, Sergio; Chaddad-Neto, Feres.
Título: Is the omega sign a reliable landmark for the neurosurgical team? An anatomical study about the central sulcus region / O sinal do ômega é um reparo anatômico confiável para a equipe neurocirúrgica? Estudo anatômico sobre a regiāo do sulco central
Fuente: Arq. neuropsiquiatr;73(11):934-938, Nov. 2015. tab, graf.
Idioma: en.
Resumen: ABSTRACTThe central sulcus region is an eloquent area situated between the frontal and parietal lobes. During neurosurgical procedures, it is sometimes difficult to understand the cortical anatomy of this region.Objective Find alternative ways to anatomically navigate in this region during neurosurgical procedures.Method We analyzed eighty two human hemispheres using a surgical microscope and completed a review of the literature about central sulcus region.Results In 68/82 hemispheres, the central sulcus did not reach the posterior ramus of the lateral sulcus. A knob on the second curve of the precentral gyrus was reliably identified in only 64/82 hemispheres.Conclusion The morphometric data presented in this article can be useful as supplementary method to identify the central sulcus region landmarks.

RESUMOA região do sulco central é uma área eloquente posicionada entre os lobos frontal e parietal. Durante procedimentos neurocirúrgicos, em algumas ocasiões, torna-se difícil compreender a anatomia cortical desta região.Objetivo Encontrar métodos alternativos para uma navegaçāo anatômica desta regiāo durante procedimentos neurocirúrgicos.Método Analisamos oitenta e dois hemisférios humanos usando um microscópio cirúrgico, além de fazer uma revisão da literatura.Resultados Em 68/82 hemisférios, o sulco central não atingiu o ramo posterior do sulco lateral. Uma dilatação na segunda curva do giro precentral foi encontrada em apenas 64/82 hemisférios.Conclusão Os dados morfométricos apresentados neste artigo podem ser úteis como método suplementar para identificação dos reparos anatômicos na região do sulco central.
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Id: lil-757874
Autor: López-Garrido, Jimena; Schulz-Rosales, Rolando; Cerda-Peralta, Bárbara; Rivera-Rothgaenger, Macarena; Martínez-Arriagada, Valentina; Mora-Figueroa, Natalia; Díaz-Guzmán, Walter; Romo-Ormazábal, Fernando.
Título: Paralelismo entre plano oclusal y plano de Camper / Parallelism between the occlusal plane and the Camper's line
Fuente: Rev. clín. periodoncia implantol. rehabil. oral (Impr.);8(2):106-110, ago. 2015. ilus.
Idioma: es.
Resumen: Objetivo: El propósito de este estudio fue verificar la relación de paralelismo entre el plano oclusal y 3 definiciones de plano de Camper en una población eugnásica chilena. Material y métodos Estudio transversal. Se seleccionaron 60 adultos jóvenes chilenos eugnásicos (32 hombres y 28 mujeres) entre 18 y 35 años. Se utilizaron telerradiografías de perfil digitales y fotografías faciales laterales estandarizadas. Se superpuso la cefalometría en las fotografías laterales con el programa Quick-Ceph®. Los planos de Camper se trazaron desde 3 diferentes puntos de inicio en el tragus (superior, medio e inferior) hacia el punto más inferior del ala de la nariz. Se midieron los ángulos formados entre el plano oclusal y los 3 planos de Camper resultantes con el programa Screen Protractor®. Resultados El análisis ANOVA muestra diferencias significativas entre los 3 ángulos. El ángulo promedio entre el plano de Camper medio y el plano oclusal fue -0,63°. En hombres, el plano de Camper medio fue más paralelo al plano oclusal (1,11°) y en mujeres el plano de Camper superior fue el más paralelo con el plano oclusal (1,39°). Conclusión El paralelismo fue verificado para el plano de Camper medio en hombres y para el plano de Camper superior en mujeres.

Objective: The aim of this study was to verify the parallelism between the occlusal plane and three different Camper's line definitions in a Chilean eugnathic population. Material and methods Cross-sectional study was conducted on 60 Chilean eugnathic young adults (32 males and 28 females) between 18 and 35 years old. Lateral digital standardised cephalometric radiographs and facial photographs were used. The cephalometric analysis was superimposed over the lateral photographs with Quick-Ceph® software. The Camper's line was traced from three different starting points at the Tragus (upper, middle and lower) to the lowest point below the nostrils. The angles obtained between the occlusal plane and the resulting Camper's lines were measured with Screen Protractor® software. Results The ANOVA test showed significant differences for the obtained angles. The mean parallelism between the medium Camper's line and the occlusal plane was -0.63°. In males, the medium Camper's line was more parallel to the occlusal plane (1.11°), and for females, the upper Camper's line was the most parallel to the occlusal plane (1.39°). Conclusion The parallelism was verified for the medium Camper's line in males, and for the upper Camper's line in females.
Responsable: CL1.1 - Biblioteca Central


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Id: lil-754982
Autor: Quieregatto, Paulo Rogério; Hochman, Bernardo; Furtado, Fabianne; Ferrara, Soraia Francisco; Machado, Aline Fernanda Perez; Sabino Neto, Miguel; Ferreira, Lydia Masako.
Título: Photographs for anthropometric measurements of the breast region. Are there limitations?
Fuente: Acta cir. bras;30(7):509-516, 07/2015. tab, graf.
Idioma: en.
Resumen: PURPOSE: To determine the limitations of the photographs used to obtain the anthropometric measurements of the breast region. METHODS: Five women, between the ages of 18 to 60 years, were evaluated. Photographs of the frontal and left and right profile views of their breasts were taken. Based on the current literature, the most commonly used anthropometric and anatomic landmarks for breast measurement were marked in their different positions. The different points were used to evaluate if the direct anthropometry was possible in a standardized way and determine how the points and the positions can to be used in any breast measurements. RESULTS: There were some limitations to the use of defining points of the breast fold, as well as of its lower portion and lateral extension positions in both profiles. CONCLUSION: The defining points of the breast fold and the profile photographs have some limitations and we suggested how the points and positions can be used for breasts measurements. .
Responsable: BR1.1 - BIREME


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Id: lil-742514
Autor: Shokri, Abbas; Falah-Kooshki, Sepideh; Poorolajal, Jalal; Karimi, Atena; Ostovarrad, Farzaneh.
Título: Evaluation of the location of mandibular foramen as an anatomic landmark using CBCT images: a pioneering study in an iranian population / Avaliação da localização do forame mandibular como referência anatômica, por meio de imagens CBCT: um estudopioneiro na população iraniana
Fuente: Braz. dent. sci;17(4):74-81, 2014. tab.
Idioma: en.
Resumen: Objective: Mandibular foramen (MF) is located on the internal surface of the ramus through which blood vessels and nerves pass. Determination of the anatomic position of the MF is very important in inferior alveolar nerve block anesthesia (IANBA), ramus osteotomy and surgical procedures of the posterior angle of mandibular ramus. The aim of this study was to determine anatomic position of the MF using anatomic landmarks on the three dimensional CBCT images. Material and Methods: A total of 103 CBCT images was evaluated. The NNT Viewer software program was used to measure the distances between the lines tangent on the MF periphery and the anterior border of the ramus, the posterior border of the ramus, the inferior border of the mandible, and the coronoid notch in mm by to age and gender. Results: The results showed a slight difference in anatomic dimensions between the right and left sides, with no significant differences. The anatomic dimensions of the MF on both sides were a little bigger in males than in females. There were no significant differences in the anatomic dimensions of superior inferior and anterior-posterior dimensions of the left and right sides in different age groups. Conclusion: No significant changes occur in the position of the MF with age. The anatomic differences between males and females should be taken into account during IANBA procedures. Males have bigger jaws than females; therefore, there is a longer distance between the MF and the anatomic landmarks evaluated...

Objetivo: O forame mandibular (FM) localiza-se na superfície interna do ramo mandíbula, onde passam vasos sanguíneos e nervos. A determinação da posição anatômica do FM é muito importante para anestesia por bloqueio do nervo alveolar inferior (ABNAI), durante osteotomiano ramo da mandíbula e para procedimentos cirúrgicos do ângulo posterior do ramo mandibular. O objetivo deste estudo foi determinar a posição anatômica do FM utilizando referências anatômicas em imagens tridimensionais de CBCT. Material e Métodos: Um total de 103 imagens de CBCTforam avaliadas. O programa de software NNT Viewer foi utilizado para medir as distâncias em milímetros entre as linhas tangentes na periferia do FM e borda anterior do ramo, borda posterior do ramo, borda inferior da mandíbula e processo coronóide, em relação à idade e o gênero. Resultados: Os resultados mostraram uma ligeira diferença de dimensões anatômicas entre os lados direito e esquerdo, sem diferenças significativas. As dimensões anatômicas do FM em ambos os lados foram um pouco maior no sexo masculino do que no feminino. Não houve diferenças significativas nas dimensões anatômicas superior-inferior e ânteroposterior, tanto do lado direito quanto esquerdo,em diferentes faixas etárias. Conclusão: Mudanças significativas na posição do FM não são observadas em função da faixa etária. As diferenças anatômicas entre homens e mulheres devem ser levadas em consideração durante procedimento ABNAI. Mandíbulas maiores são encontradas no gênero masculino, portanto, há uma maior distância entre o FM e as referências anatômicas avaliadas...
Responsable: BR243.1 - Serviço Técnico de Biblioteca e Documentação


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Id: lil-741592
Autor: FERNANDES, Thais Maria Freire; ADAMCZYK, Julie; POLETI, Marcelo Lupion; HENRIQUES, José Fernando Castanha; FRIEDLAND, Bernard; GARIB, Daniela Gamba.
Título: Comparison between 3D volumetric rendering and multiplanar slices on the reliability of linear measurements on CBCT images: an in vitro study
Fuente: J. appl. oral sci;23(1):56-63, Jan-Feb/2015. tab, graf.
Idioma: en.
Resumen: OBJECTIVE: The purpose of this study was to determine the accuracy and reliability of two methods of measurements of linear distances (multiplanar 2D and tridimensional reconstruction 3D) obtained from cone-beam computed tomography (CBCT) with different voxel sizes. MATERIAL AND METHODS: Ten dry human mandibles were scanned at voxel sizes of 0.2 and 0.4 mm. Craniometric anatomical landmarks were identified twice by two independent operators on the multiplanar reconstructed and on volume rendering images that were generated by the software Dolphin®. Subsequently, physical measurements were performed using a digital caliper. Analysis of variance (ANOVA), intraclass correlation coefficient (ICC) and Bland-Altman were used for evaluating accuracy and reliability (p<0.05). RESULTS: Excellent intraobserver reliability and good to high precision interobserver reliability values were found for linear measurements from CBCT 3D and multiplanar images. Measurements performed on multiplanar reconstructed images were more accurate than measurements in volume rendering compared with the gold standard. No statistically significant difference was found between voxel protocols, independently of the measurement method. CONCLUSIONS: Linear measurements on multiplanar images of 0.2 and 0.4 voxel are reliable and accurate when compared with direct caliper measurements. Caution should be taken in the volume rendering measurements, because the measurements were reliable, but not accurate for all variables. An increased voxel resolution did not result in greater accuracy of mandible measurements and would potentially provide increased patient radiation exposure. .
Responsable: BR1.1 - BIREME


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Aguiar, José Lamartine de Andrade
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Id: lil-741041
Autor: Coelho Junior, Elísio Rodrigues; Costa, Laura Olinda Bregieiro Fernandes; Alencar, Arinaldo Vasconcelos; Barbosa, Ana Paula Guimarães; Pinto, Flávia Crisina Morone; Aguiar, José Lamartine de Andrade.
Título: Prevention of peritoneal adhesion using a bacterial cellulose hydrogel, in experimental study
Fuente: Acta cir. bras;30(3):194-198, 03/2015. tab.
Idioma: en.
Resumen: PURPOSE: To analyze the effectiveness of bacterial cellulose hydrogel as a barrier in preventing postoperative peritoneal adhesion in rat model. METHODS: Experimental study with 45 Wistar rats (Rattus norvegicus) that were divided into three groups for the following treatments: A. Saline, B. Oxidized Regenerated Cellulose (ORC) barrier, and C Bacterial Cellulose Hydrogel (BCH) barrier. After 45 days of the surgery the adhesions were classified and graded according to the qualitative score. The histological parameters were evaluated using a modified semi-quantitative scale to rate the extent of fibrosis, inflammatory reaction and vascular proliferation. RESULTS: Compared with the saline group (A), the treatments with ORC barrier (B) and BHC barrier (C) resulted in a smaller number of adhesions (p=0.019 and p=0.003 on Fisher's exact test, respectively). Data from inflammation and neovascularization showed no statistically significant difference between the groups BHC and ORC (p=0.426 and 0.446 on chi-square test, respectively). CONCLUSION: Bacterial cellulose hydrogel is effective as a bio-re-absorbable barrier for preventing postoperative peritoneal adhesions. .
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