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Braz. j. oral sci ; 21: e226415, jan.-dez. 2022. tab
Article in English | LILACS, BBO | ID: biblio-1354995


Aim: Facial orthopaedic treatments based on the stimulation or restrictions of craniofacial bone growth are more effective when carried out during the pubertal growth spurt. The aim of this cross-sectional study was to evaluate the reproducibility of two cervical vertebrae methods (CVM) with manual tracing and direct visual inspection. Methods: A sample of 60 lateral cephalometric radiographs (10 of each of the 6 CVM stages) was randomly selected from 171 records. 5 orthodontists classified these radiographs according to the skeletal maturation stage in 2002 and 2005, and the application of both methods was conducted by direct visual inspection and evaluation through manual tracing. Results: The average reliability of the two methods determination and the two forms of evaluation was substantial. The direct visual inspection evaluation showed the highest reliability and agreement interexaminer values for both methods, as well as the intraexaminers evaluation. Conclusion: The reproducibility of CVM method was substantial, indicating its clinical use to determine the skeletal maturity and the ideal moment for treatment execution

Bone Development , Cervical Vertebrae , Reproducibility of Results
Actual. osteol ; 17(1): [18-34], 2021. ilus
Article in Spanish | LILACS, BINACIS, UNISALUD | ID: biblio-1292027


La osteología como práctica científica muestra, a través de su historia, los esfuerzos de los hombres de ciencia que pretendían explicar la entidad característica del hueso y sus procesos de formación. La extensión de esas investigaciones hace que se pierda el núcleo de lo que tiene la osteología de ciencia: las teorías osteológicas. Esta revisión historiográfica pretende ­con ayuda de la epistemología semántica­ presentar un esquema de red teórica que represente a algunos de esos modelos teóricos. (AU)

Osteology as a scientific practice shows through its history the efforts of scientists who tried to explain the characteristic entity of bone and its formation processes. The extension of these investigations causes that the nucleus of what the osteology of science has is lost: osteological theories. This historiographic review aims with the help of semantic epistemology to present a theoretical network scheme that represents some of these theoretical models. (AU)

Humans , Osteogenesis , Bone and Bones/anatomy & histology , Osteology/history , Models, Theoretical , Philosophy, Medical , Bone Development , Knowledge , History, 20th Century
Int. j. odontostomatol. (Print) ; 14(2): 141-143, June 2020. graf
Article in English | LILACS | ID: biblio-1090665


The aim of the study was to determine the possibility of using panoramic X-ray as an auxiliary tool for the identification of talent in young athletes using the physical body growth indicator. Thirty three radiographs were used of athletes aged 13 to 15 years. Analysis was performed using the Eklof and Ringertz method. Dental age (40 %) came the closest to chronological age. Dental age determined in this study proved to be the most effective radiographic method for the determination of bone maturity for use in the identification of talent through imaging exams. This method was also the simplest and can be performed by the dentist of a sports club without exposing athletes to unnecessary radiation.

El objetivo del estudio consistió en determinar la posibilidad de usar radiografía panorámica como herramienta auxiliar para la identificación de talentos en los atletas usando el indicador de crecimiento del cuerpo físico. Fueron utilizadas 33 radiografías de atletas, de entre 13 a 15 años. Se realizó un análisis de la aplicación utilizando el método de Eklof y Ringertz. Se encontró que la edad dentaria (40 %) se aproximó a la edad cronológica. La edad dental utilizada en este estudio demostró ser el método radiográfico más efectivo para la determinación de la madurez ósea para su uso en la identificación del talento a través de exámenes de imágenes. Este método también fue el más simple y puede ser realizado por el dentista de un club deportivo sin exponer a los atletas a radiaciones innecesarias.

Humans , Male , Adolescent , Aptitude , Soccer , Bone Development , Radiography, Panoramic/methods , Athletic Performance , Pilot Projects , Growth
Rev. cir. traumatol. buco-maxilo-fac ; 20(2): 35-39, abr.-jun. 2020. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-1253483


Introdução: O tórus palatino se caracteriza por um desenvolvimento ósseo não patológico que ocorre ao longo da linha média do palato duro. Possui etiologia relacionada a fatores genéticos e ambientais, sendo a exostose mais comum em cavidade oral. O tratamento cirúrgico só é necessário em casos específicos quando o tórus interfere nas funções do sistema estomatognático ou na instalação de prótese total no palato. O presente estudo teve como objetivo relatar um caso clínico de tratamento cirúrgico de extenso tórus palatino onde foi empregado um acesso cirúrgico modificado. Relato de caso: Esse trabalho descreve o caso de uma paciente com um tórus palatino de dimensões atípicas com queixas fonéticas e protéticas. Devido ao tamanho da exostose e para permitir uma abordagem mais simplificada, optou-se por um acesso cirúrgico modificado, que em conjunto com a confecção de placa em resina acrílica para instalação no pós-operatório, auxiliou na recuperação e conforto da paciente. Considerações Finais: A técnica cirúrgica utilizada preveniu possíveis desvantagens relacionadas à técnica tradicional, portanto, garantiu um pós-operatório confortável, podendo ser aplicada em tratamentos de tórus palatino quando bem indicada... (AU)

Introduction: Palatine torus is characterized by a non-pathological bone development that occurs along the midline of the hard palate. It`s etiology is related to genetic and environmental factors, being the most common exostoses in the oral cavity. Surgical treatment is only necessary in specific cases when the torus interferes in the functions of the stomatognathic system or in the installation of total prosthesis in the palate. The present study aimed to report a clinical case of surgical treatment of extensive palatine torus where a modified surgical approach was employed. Case report: This article describes the case of a patient with a palatine torus of atypical dimensions with phonetic and prosthetic complaints.Due to the size of the exostoses and to allow a more simplified approach, a modified surgical access was chosen, which together with the confection of acrylic resin plaque for postoperative installationaided in patient recovery and comfort. Final considerations: The surgical technique used prevented possible disadvantages related to the traditional technique, therefore, it guaranteed a comfortable postoperative period... (AU)

Humans , Female , Middle Aged , Surgery, Oral , Stomatognathic System , Exostoses , Palate, Hard , Mouth , Postoperative Period , Prostheses and Implants , Bone Development
J. oral res. (Impresa) ; 9(1): 7-13, feb. 28, 2020. ilus, graf, tab
Article in English | LILACS | ID: biblio-1151386


Objective: This study was conducted to investigate the relationship between dental development and cervical vertebral maturation stages in a group of Yemeni children and adolescents. Materials an Methods: The study included digital panoramic radiographs and lateral skull cephalograms obtained from 207 Yemeni subjects­122 females and 85 males aged between 8 to 18 years. Dental maturity was evaluated according to the method of Demirijian et al., calcification stages of the left mandibular canines, first and second premolars and second molars were assessed. Skeletal maturity was assessed by the cervical vertebral maturation (CVM) stages according to the method of Baccetti et al. Correlation between CVM and dental maturation was evaluated by Spearman rank-order correlation coefficient (SROCC). Results: CVM and dental calcification stages were highly correlated (p<0.001) in both genders, ranging from 0.686 to 0.873 for females and 0.787 to 0.871 for males. Calcification stages of the second molars showed the strongest correlation with CVM. Conclusion: Calcification stages of the second molar may be used as a reliable maturation indicator. Dental maturation may be applied to determine the skeletal maturity status of Yemeni children and adolescents.

Objetivo: Este estudio se realizó para investigar la relación entre el desarrollo dental y las etapas de maduración vertebral cervical en un grupo de niños y adolescentes yemeníes. Material y Métodos: El estudio incluyó radiografías panorámicas digitales y cefalogramas laterales del cráneo obtenidos de 207 sujetos yemeníes: 122 mujeres y 85 hombres de entre 8 y 18 años. La madurez dental se evaluó de acuerdo con el método de Demirijian et al. Se evaluaron las etapas de calcificación de los caninos mandibulares izquierdos, primer y segundo premolares y segundos molares. La madurez esquelética se evaluó mediante las etapas de maduración vertebral cervical (CVM) de acuerdo con el método de Baccetti et al. La correlación entre la CVM y la maduración dental se evaluó mediante el coeficiente de correlación de orden de rango de Spearman (SROCC). Resultado: Las etapas de CVM y calcificación dental estuvieron altamente correlacionadas (p<0.001) en ambos sexos, con un rango de 0.686 a 0.873 para las mujeres y 0.787 a 0.871 para los hombres. Las etapas de calcificación de los segundos molares mostraron la correlación más fuerte con CVM. Conclusión: las etapas de calcificación del segundo molar pueden usarse como un indicador de maduración confiable. La maduración dental puede aplicarse para determinar el estado de madurez esquelética de los niños y adolescentes yemeníes.

Humans , Male , Female , Child , Adolescent , Tooth Calcification/physiology , Cervical Vertebrae/growth & development , Yemen , Bicuspid/physiology , Bone Development , Radiography, Panoramic , Cephalometry , Epidemiology, Descriptive , Cross-Sectional Studies , Cuspid/physiology , Incisor/physiology , Molar/physiology
Article in Chinese | WPRIM | ID: wpr-828497


To evaluate the efficacy and safety of aromatase inhibitor letrozole in treatment of male adolescents with idiopathic short stature (ISS). Seventy five boys with height less than 2 standard deviation (SD) below the mean who had entered puberty were enrolled in our study from 2004 to 2017, in the Pediatric Department of the First Affiliated Hospital, Sun Yat-Sen University. Among 75 patients, 28 in letrozole group received letrozole and spironolactone, 30 in gonadotrophin releasing hormone analogue (GnRHa) group received GnRHa injection and 17 had no intervention. Height velocity (HV), increment of bone age/chronological age (ΔBA/ΔCA), the final adult height (FAH) were compared among groups and the safety of letrozole treatment was evaluated. HV maintained faster during letrozole treatment when compared with other groups. HV during GnRHa treatment showed slightly decline in the first 6 months, but decreased remarkably after 6 months, and was significantly lower than that in letrozole group ( < 0.05). The maturation of BA slowed down in both letrozole and GnRHa groups. But the ΔBA/ΔCA in letrozole group during the first and the second year of treatment were significantly higher (0.67±0.09, 0.50±0.15, respectively) when compared with GnRHa group (0.59±0.16, 0.44±0.13, respectively) ( =2.78 and 2.20, all < 0.05). FAH in letrozole group and GnRHa group were (170±4) cm and (170±6)cm, there was no significant differences between the two groups ( >0.05), and both were higher than that in no intervention group (162±4 cm, < 0.01). After 6 months of letrozole treatment, testicular volumes and serum testerone levels increased; 39.2% (11/28) boys had clinical manifestations of hyperandrogenemia, and 82.1% (23/28) boys had decreased serum high-density lipoprotein (HDL) levels. Serum levels of HDL and testerone returned normal and the hyperandrogenemia disappeared after the cessation of letrozole treatment. No significant changes in serum triglyceride, serum low-density lipoprotein (LDL), fating serum levels of insulin and glucose, HOMA-IR were observed. No abnormal liver function, myalgia, scoliosis or aggravations of scoliosis was found. Long term letrozole therapy during puberty in boys with ISS can delay bone maturation without significant decrease of linear growth, and thus can improve the final adult height. No severe adverse reactions were found.

Adolescent , Body Height , Bone Development , Child , Gonadotropin-Releasing Hormone , Growth Disorders , Humans , Letrozole , Therapeutic Uses , Male
J. pediatr. (Rio J.) ; 95(5): 607-613, Sept.-Oct. 2019. tab, graf
Article in English | LILACS | ID: biblio-1040351


Abstract Objective: To analyze the effect of height catch-up at school age on the bone mass of adolescents of a Brazilian birth cohort. Methods: A cohort study using data obtained from the three moments (birth, 7/9 years and 18/19 years of age) of the Cohorts-RPS study. Height catch-up was defined based on the difference between the schoolchild's z-score and birth z-score. The adolescents' bone mineral mass was analyzed using the z-score index for the lumbar spine measured by dual emission X-ray absorptiometry. A theoretical model was developed for the proposed analysis using directed acyclic graphs paired through the nearest-neighbor matching propensity score using the STATA software, version 14.0. The level of significance was set at 5%. Results: Of the 297 studied children, 24.5% achieved height catch-up. The bone mass below the expected for age was observed in 5.39% of the subjects. The mean lumbar spine z-score was −0.34 (±1.01). After the adjustment, no effect was observed between height catch-up at school age and bone mass in adolescents (Coeff = 0.598; 95% CI −0.117 to 1.313; p = 0.101). Conclusion: Even using the directed acyclic graphs and the causal inference method by adjusting the propensity score, the height catch-up did not seem to affect bone mass in adolescents, a result perhaps related to the sample size.

Resumo: Objetivo: Analisar o efeito do catch-up de estatura na idade escolar na massa óssea em adolescentes em uma coorte brasileira de nascimento. Métodos: Estudo de coorte, utilizando dados dos três momentos (nascimento, aos 7/9 anos e 18/19 anos) da pesquisa Coortes-RPS. Catch-up de estatura foi definida a partir da diferença entre o Z-score do escolar e Z-score do nascimento. Para a análise da massa óssea em adolescentes foi utilizado o índice Z-score da coluna lombar medido pela densitometria por dupla emissão de raio X. Para análise proposta, foi construído modelo teórico usando os gráficos acíclicos direcionados e pareado por escore de propensão do tipo vizinho mais próximo utilizando o software STATA versão 14.0. O nível de significância adotado foi de 5%. Resultados: Das 297 crianças, 24,58% realizaram o catch-up estatural. Massa óssea abaixo do esperado para a idade foi de 5,39%. O Z-score médio da coluna lombar foi −0,34 (± 1,01). Após ajuste, não foi observado efeito entre catch-up de estatura na idade escolar e massa óssea no adolescente (Coef = 0,598; IC 95% −0,117-1,313; p = 0,101). Conclusão: Mesmo com os gráficos acíclicos direcionados e o método de inferência causal por ajuste do escore de propensão, o catch-up de estatura parece não afetar a massa óssea em adolescentes, resultado talvez relacionado ao tamanho da amostra.

Humans , Male , Female , Infant, Newborn , Child , Adolescent , Body Height/physiology , Bone Development/physiology , Bone Density/physiology , Reference Values , Brazil , Absorptiometry, Photon/methods , Sex Factors , Cohort Studies , Age Factors , Propensity Score , Lumbar Vertebrae/physiology , Lumbar Vertebrae/diagnostic imaging , Models, Theoretical
Arq. bras. med. vet. zootec. (Online) ; 71(2): 594-602, mar.-abr. 2019. tab
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1011288


O objetivo deste trabalho foi avaliar a concentração sérica de cálcio, cloretos, ferro, fósforo e magnésio, as características morfométricas ósseas e a deposição de cálcio e fósforo nas tíbias de frangos de corte recebendo dieta com zero, 0,25 ou 0,50% de bentonita. Um ensaio foi conduzido com 288 frangos de corte de 14 a 21 dias de idade, submetidos a três dietas experimentais: sem inclusão (0,0); com inclusão de 0,25 e com inclusão de 0,50% do adsorvente bentonita. Não foram observadas diferenças (P>0,05) no desempenho das aves, nos níveis séricos de cálcio, cloretos, ferro e magnésio, no entanto os níveis de fósforo foram reduzidos (P<0,05) nas aves que ingeriram dieta com 0,50% de bentonita. Em relação às tíbias, observou-se redução (P<0,05) na matéria mineral (g e %) e no teor de cálcio com a inclusão de 0,50% de bentonita. Houve redução (P<0,05) nos níveis de fósforo das tíbias com a inclusão de 0,25 e 0,50% de bentonita. Conclui-se que a inclusão de até 0,50% do adsorvente de micotoxinas bentonita na dieta de frangos de corte não altera o desempenho zootécnico das aves. A inclusão de 0,25% de bentonita, na dieta de frangos de corte, não altera a concentração dos minerais séricos e a deposição de minerais nas tíbias, entretanto a inclusão de 0,5% reduz os níveis séricos de fósforo, o teor de matéria mineral e a concentração de cálcio e fósforo ósseos, sem afetar as características morfométricas ósseas.(AU)

The aim of this study was to evaluate performance, serum concentration of calcium, chloride, iron, magnesium, phosphorus, and bone characteristics, ash, calcium, and phosphorus in tibias of broilers receiving diet with zero, 0.25 or 0.50% of bentonite. No differences were found on performance of poultry, on serum mineral calcium, chloride, iron, magnesium, however phosphorus levels of broilers fed on diets containing 0.5% bentonite was reduced. With respect to tibia, reduction was observed on mineral matter (g and %) and calcium levels with inclusion of 0.50% bentonite, and reduction on phosphorus levels with inclusion of 0.25 or 0.50% of bentonite on diet. We conclude that the inclusion of up to 0.50% of mycotoxin adsorbent bentonite in diet of broiler does not change broiler performance. The inclusion of 0.25% of bentonite in diet of broiler does not change serum mineral concentration and mineral deposition; however, the inclusion of 0.5% decrease serum levels of phosphorus, the content of bone mineral matter, with not effects on bone morphometric characteristics.(AU)

Animals , Male , Bentonite/administration & dosage , Bentonite/therapeutic use , Bone Development , Antitoxins/administration & dosage , Chickens/growth & development , Diet/veterinary , Food Additives/therapeutic use , Animal Feed , Minerals/analysis , Minerals/blood , Chickens/microbiology
Saude e pesqui. (Impr.) ; 12(1): 203-213, jan.-abr. 2019. ilus, tab
Article in Portuguese | LILACS | ID: biblio-987891


Este trabalho teve como objetivo realizar uma avaliação fisioterapêutica em um voluntário com malformação congênita do membro inferior direito, a fim de conhecer seus aspectos motores e funcionais, devido ao fato de ser um caso peculiar com incidência de 1 a cada 100.000 nascidos vivos. Tratou-se de um relato de caso, realizado na clínica escola de fisioterapia de uma universidade do interior do Estado de São Paulo. Os procedimentos consistiram em: anamnese, exame físico, escalas e instrumentos de avaliação do controle, índice de Barthel modificado, plataforma de força e avaliação postural. Pode-se observar através da avaliação fisioterapêutica alterações posturais relevantes com assimetrias entre os hemicorpos, déficit de equilíbrio e diminuição de força muscular no membro inferior direito, o que acarreta uma alteração biomecânica importante no participante avaliado. Essas informações coletadas durante as avaliações são essenciais para conhecer as alterações físicas decorrentes da malformação congênita para promover um melhor direcionamento em seu tratamento.

A physiotherapy evaluation has been undertaken with a voluntary subject with congenital malformation of the right lower limber to understand motor and functional aspects of the issue. The fact has an occurrence of 1/100000 live births. The case study has been undertaken in a physiotherapy school at a university clinical in the interior of the state of São Paulo, Brazil. Procedures included anamnesis, physical examination, scales and instruments for control assessment, modified Barthel Index, force platform and posture evaluation. Physiotherapeutic evaluation revealed significant posture changes with asymmetry between the hemibodies, deficit in equilibrium and lessening of muscular force in the right lower member, with subsequent important biomechanical changes in the patient. Information collected during evaluations is essential to understand the physical alternations due to congenital malformation for better results through treatment.

Child , Artificial Limbs , Bone Development , Child , Physical Therapy Specialty , Musculoskeletal Abnormalities
Rev. colomb. radiol ; 30(2): 5158-5163, Jun. 2019. ilus, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1290883


El dedo (falange) pélvico es una alteración benigna resultante de una anomalía en el desarrollo óseo, donde se encuentra una estructura ósea con apariencia radiológica característica en los tejidos blandos, especialmente en relación con la articulación coxofemoral, aunque puede tener otras localizaciones. Se trata de una entidad benigna que usualmente es asintomática y se encuentra como hallazgo incidental. Conocer su origen y características imaginológicas es de gran importancia para poderla diferenciar de otras lesiones como osificaciones postraumáticas o lesiones por avulsión, que son frecuentes en esta misma localización. Se presentan seis casos con hallazgo incidental de dedo pélvico en diferentes modalidades diagnósticas

The pelvic digit is a benign entity resulting from an abnormality in bone development, where a bony structure with a characteristic radiological appearance is found in the soft tissues, especially in relation to the hip joint, although it may be found at other locations. It is usually asymptomatic and is found as an incidental finding. Knowing its origin and imaging characteristics is of great importance to differentiate it from other injuries such as post-traumatic ossification or avulsion injuries, which are frequent in this same location. Six cases, from the institution, with incidental finding of pelvic digit in different diagnostic modalities are presented.

Bone Development , Pelvic Bones , Calcification, Physiologic , Hip Joint
Rev. Fac. Odontol. (B.Aires) ; 34(77): 35-42, 2019. ilus
Article in Spanish | LILACS | ID: biblio-1104093


En la odontología es frecuente que se describa la peculiaridad de los huesos maxilares en cuanto a la resistencia a las infecciones en comparación con otros huesos de la economía. O que se plantée un desafío cuando es necesario tomar una decisión acerca de aplicar diferentes conductas terapéuticas en pacientes con patologías óseas sistémicas. Por ello, esta actualización tuvo como objetivo realizar una revisión de la bibliografía para integrar y evidenciar las diferencias y similitudes entre los diferentes huesos de la economía haciendo hincapié en los huesos maxilares. Si bien éstos poseen una gran cantidad de similitudes con el resto de los huesos, también presentan diferencias que los hacen entidades únicas dentro del sistema esquelético como el origen embriológico en las células de las crestas neurales, su alta tasa de remodelación, sin olvidar que estos huesos alojan a órganos que poseen una parte de su estructura en el medio interno y otra porción en medio externo de la cavidad bucal: las piezas dentarias (AU)

Humans , Bone Development/physiology , Bone Remodeling/physiology , Jaw/embryology , Jaw/physiology , Osteogenesis , Phenotype , Skeleton , Extracellular Matrix/physiology , Neural Crest/anatomy & histology , Neural Crest/growth & development
Rio de janeiro; s.n; 2019. 78 p. ilus.
Thesis in Portuguese | LILACS, BBO | ID: biblio-1022977


Doenças sistêmicas como as cardiopatias, podem interferir no processo de crescimento da criança, podendo levar a uma diminuição da oxigenação dos tecidos e prejudicar o seu desenvolvimento normal. A avaliação da idade e maturação óssea de cardiopatas é de grande utilidade para o planejamento ortodôntico, principalmente para determinação do início do tratamento e emprego de recursos mecânicos ortopédicos. O objetivo deste estudo foi avaliar o grau de correlação entre as idades cronológica, óssea e dentária de pacientes com e sem cardiopatia congênita. A amostra foi composta por 113 crianças e adolescentes, com idades entre 4,6 e 14,6 anos, sendo 74 portadores de cardiopatia congênita e 39 sem qualquer doença sistêmica ou local que pudesse afetar o desenvolvimento sistêmico ou o crescimento craniofacial. Todos foram atendidos no Ambulatório de Pediatria do Hospital Universitário Pedro Ernesto da Universidade do Estado do Rio de Janeiro. A idade óssea foi obtida por meio de radiografias de mão e punho, analisadas de acordo com método de Greulich e Pyle. A idade dentária foi calculadaobservando os estágios de calcificação, em radiografias panorâmicas, pelo método de Demirjian. As idades óssea e dentária foram superiores no grupo de não cardiopatas, porém sem diferença significativa, (p=0,88) e (p=0,6119), respectivamente.A idade óssea foi significativamente menor do que a cronológica, para os cardiopatas (p<0,0001). No grupo de não cardiopatas, a idade óssea foi maior, mas sem diferença significativa (p=0,3471). Em ambos os grupos, cardiopatas e não cardiopatas, a idade dentária foi significativamente maior do que a cronológica (p<0,0001).Houve diferença significativa para os dois grupos, cardiopatas e não cardiopatas, com valor maior para a idade dentária, na comparação com a idade óssea.Quanto à idade dentária, ninguém apresentou atraso, nem do grupo de cardiopatas, nem de não cardiopatas. O mesmo resultado foi observado na estratificação por sexo. Em relação à idade óssea, houve maior atraso no grupo de cardiopatas, sem diferença significativa (p=1). Essa tendência também ocorreu para os meninos e meninas cardiopatas (p=0,680) e (p=0,534), respectivamente.

Systemic diseases such as heart disease can interfere with the child's growth process, which can lead to a decrease in tissue oxygenation and impair normal development. The evaluation of the age and bone maturation of cardiac patients is of great use for orthodontic planning, mainly for determination of the beginning of the treatment and the use of orthopedic mechanical resources. The objective of this study was to evaluate the degree of correlation between the chronological, bone and dental ages of patients with and without congenital heart disease. The sample consisted of 113 children and adolescents, aged between 4.6 and 14.6 years, of whom 74 had congenital heart disease and 39 without any systemic or local disease that could affect systemic development or craniofacial growth. All were attended at the pediatric outpatient clinic of the Pedro Ernesto University Hospital of the State University of Rio de Janeiro. Bone age was obtained by hand and wrist radiographs, analyzed according to the method of Greulich and Pyle. Dental age was calculated by observing the calcification stages on panoramic radiographs by the Demirjian method. Bone and dental ages were higher in the non-cardiopathic group, but with no significant difference (p = 0.88) and (p = 0.6119), respectively. Bone age was significantly shorter than chronological age for cardiac patients (p <0.0001). In the non-cardiopathic group, bone age was higher, but without significant difference (p = 0.3471). In both groups, with and without congenital heart disease patients, dental age was significantly higher than chronological age (p <0.0001). There was a significant difference for the two groups, with and without heart disease, with a higher value for dental age compared to bone age. Regarding the dental age, no one presented delay, neither of the group of cardiac patients nor of non-cardiac patients. The same result was observed in the stratification by sex. In relation to bone age, there was a greater delay in the group of patients with heart disease, without significant difference (p = 1). This trend also occurred for the boys (p = 0.680)and girls (p = 0.534)with heart disease

Humans , Male , Female , Child, Preschool , Child , Adolescent , Age Determination by Skeleton , Age Determination by Teeth , Heart Defects, Congenital/physiopathology , Bone Development
Article in English | WPRIM | ID: wpr-761927


BACKGROUND: For the bone-specific imaging, a structure-inherent targeting of bone tissue recently has been reported a new strategy based on incorporation of targeting moieties into the chemical structure of near-infrared (NIR) contrast agents, while conventional methods require covalent conjugation of bone-targeting ligands to NIR contrast agents. This will be a new approach for bone-targeted imaging by using the bifunctional NIR contrast agents. METHODS: The goal of this review is to provide an overview of the recent advances in optical imaging of bone tissue, highlighting the structure-inherent targeting by developing NIR contrast agents without the need for a bone-targeting ligand such as bisphosphonates. RESULTS: A series of iminodiacetated and phosphonated NIR contrast agents for the structure-inherent targeting of bone tissue showed excellent bone-targeting ability in vivo without non-specific binding. Additionally, the phosphonated NIR contrast agents could be useful in the diagnosis of bone metastasis. CONCLUSION: By developing bone-targeted NIR contrast agents, optical imaging of bone tissue makes it very attractive for preclinical studies of bone growth or real-time fluorescence guided surgery resulting in high potential to shift the clinical paradigms.

Bone and Bones , Bone Development , Contrast Media , Diagnosis , Diphosphonates , Fluorescence , Ligands , Neoplasm Metastasis , Optical Imaging , Surgery, Computer-Assisted
Article in English | WPRIM | ID: wpr-786136


PURPOSE: The modified minimally invasive surgical technique (M-MIST) has been successfully employed to achieve periodontal regeneration. Platelet-rich fibrin (PRF) is known to enhance wound healing through the release of growth factors. This study aimed to observe the outcomes of periodontal surgery when M-MIST was used with or without PRF for the treatment of isolated intrabony defects.METHODS: This randomized clinical trial was conducted on 36 systemically healthy patients, who had chronic periodontitis associated with a single-site buccal probing pocket depth (PPD) and clinical attachment level of ≥5 mm. Patients were randomly divided into 2 groups: the test group treated with M-MIST and PRF, and the control group treated with M-MIST alone. The primary periodontal parameters analyzed were PPD, relative attachment level (RAL), and relative gingival margin level. The radiographic parameters analyzed were change in alveolar crest position (C-ACP), linear bone growth (LBG), and percentage bone fill (%BF). Patients were followed up to 6 months post-surgery.RESULTS: Intragroup comparisons at 3 and 6 months showed consistently significant improvements in PPD and RAL in both the groups. In intergroup comparisons, the improvement in PPD reduction, gain in RAL, and the level of the gingival margin was similar in both groups at 3 and 6 months of follow-up. Furthermore, an intergroup comparison of radiographic parameters also demonstrated similar improvements in C-ACP, LBG, and %BF at 6 months of follow-up.CONCLUSIONS: M-MIST with or without PRF yielded comparable periodontal tissue healing in terms of improvements in periodontal and radiographic parameters. Further investigation is required to confirm the beneficial effects of PRF with M-MIST.TRIAL REGISTRATION: Identifier: NCT03169920

Bone Development , Chronic Periodontitis , Fibrin , Follow-Up Studies , Humans , Intercellular Signaling Peptides and Proteins , Microsurgery , Minimally Invasive Surgical Procedures , Regeneration , Wound Healing
Int. j. morphol ; 36(2): 391-394, jun. 2018. tab, graf
Article in English | LILACS | ID: biblio-954126


Resveratrol in cell culture media increases osteoblastic markers. Also results from previous studies provide evidence for resveratrol positive effects on bone healing and bone production. In this preclinical study we investigated bone healing in rats by resveratrol systemic application. 30 Wistar male rats were divided into two groups (study group and control group). At first, maxillary second molars of rats were extracted. The rats were kept in laboratory for next 28 days. Study group received resveratrol 20 mg/kg by abdominal injection every day. The control group received placebo in the same manner that study group. Rats were sacrificed after 28 days and bone samples were collected from center of maxillary second molar socket. Samples were evaluated histologically for new bone formation, inflammation, necrosis, fibrosis and foreign body reaction. The mean difference of new bone formation in control group (28.30 %) and study group (45 %) were statistically significant (P=0.014). There were no significant differences in inflammation, fibrosis, necrosis and foreign body reaction (P>0.05). Resveratrol has positive effects on bone healing but more evidence needed from more clinical and animal studies.

El resveratrol en los medios de cultivo celular aumenta los marcadores osteoblásticos. Los resultados de estudios anteriores proporcionan evidencia de efectos positivos del resveratrol sobre la curación ósea y la producción ósea. En este estudio preclínico, investigamos la curación ósea en ratas mediante la aplicación sistémica de resveratrol. Se dividieron 30 ratas macho Wistar en dos grupos (estudio y control). Inicialmente se extrajeron los segundos molares maxilares de las ratas y los animales se mantuvieron en el laboratorio durante los siguientes 28 días. El grupo de estudio recibió todos los días resveratrol 20 mg/kg por inyección abdominal . El grupo control recibió placebo de la misma manera que el grupo estudio. Las ratas fueron sacrificadas después de 28 días y se recogieron muestras de hueso del centro del segundo molar maxilar. Las muestras se evaluaron histológicamente para la formación de hueso nuevo, inflamación, necrosis, fibrosis y reacción de cuerpo extraño. La media de formación de hueso nuevo en el grupo control (28,30 %) y en el grupo estudio (45 %) fueron estadísticamente significativas (P=0,014). No hubo diferencias significativas en la inflamación, fibrosis, necrosis y reacción al cuerpo extraño (P>0,05). El resveratrol tiene efectos positivos sobre la curación de los huesos, pero aún es necesario realizar más pruebas de estudios clínicos, como también en animales.

Animals , Rats , Osteoblasts/drug effects , Osteoclasts/drug effects , Stilbenes/pharmacology , Bone Development/drug effects , Osteogenesis/drug effects , Rats, Wistar , Dietary Supplements
Rev. biol. trop ; 66(2): 765-775, abr.-jun. 2018. tab, graf
Article in Spanish | LILACS, SaludCR | ID: biblio-977343


Resumen El conocimiento de la dinámica de poblaciones provee información sobre la historia reciente, el estado actual y la tendencia futura de una población. Physalaemus biligonigerus es un anuro con una amplia distribución en el Neotrópico, presenta una actividad reproductiva elevada y explosiva, pero sus poblaciones parecen estar compuestas por individuos jóvenes. El objetivo de este estudio fue analizar la demografía poblacional de P. biligonigerus en una charca semipermanente en Río Cuarto, Córdoba, Argentina y realizar una proyección poblacional a 30 generaciones. Se determinó la estructura de edad utilizando esqueletocronología, y posteriormente se construyó una tabla de vida estática. Se calculo la fecundidad y las tasas de supervivencia para cada estadío con los que se construyó una Matriz de Leslie y se realizó la proyección poblacional. La proyección muestra oscilaciones en el número de individuos pero a pesar de esto, la tendencia final de la población es a un aumento en su tamaño. La mayor proporción de supervivientes se da en las fases de huevos a larvas, y la fuerza de mortalidad actúa con intensidad sobre la fase de larvas. La tasa neta reproductiva indica que la población de P. biligonigerus de la charca en estudio está en incremento.

Abstract Knowledge of population dynamics provides information on the recent history, current status, and future trends of a population. Physalaemus biligonigerus is widely distributed in the Neotropics, this anuran has a high and explosive reproductive activity, but its populations seem to be composed of young individuals. The objective of this study was to analyze the population demography of P. biligonigerus in a semipermanent pond in Río Cuarto, Córdoba, Argentina and to carry out a population projection through 30 generations. The age structure was determined from the use of skeletochronology, and a static life table was later made. Fertility and survival rates were calculated for each stage, by which a Leslie Matrix was constructed and the population projection was performed. The projection shows oscillations in the number of individuals but in spite of this, the final tendency of the population is an increase in its size. The highest proportion of survivors occurs in the egg-to-larval stages and the mortality force acts intensively on the larval phase. The net reproductive rate indicates that the population of P. biligonigerus of the study pond is increasing. Rev. Biol. Trop. 66(2): 765-775. Epub 2018 June 01.

Animals , Anura/anatomy & histology , Bone Development/physiology , Amphibians/growth & development , Argentina
An. venez. nutr ; 31(1): 27-36, 2018.
Article in Spanish | LILACS, LIVECS | ID: biblio-1021823


La variabilidad del crecimiento y la maduración física de los venezolanos entre 1939 y 2016 es el producto de una revisión histórica-antropológica, no-sistemática ni exhaustiva, que se focaliza en la auxología epidemiológica. Como marco conceptual, se presentan los aspectos fundamentales de la variabilidad genética-biológica del crecimiento: dimorfismo sexual, variabilidad de acuerdo al ritmo de maduración y los grupos étnicos en Venezuela, país de mestizaje. En el aspecto fundamental de la variabilidad ambiental se incluye el crecimiento y desarrollo en las alturas, pero la visión se focaliza en las diferencias urbano-rurales, de acuerdo al estrato social y en los procesos dinámicos poblacionales tal como la tendencia secular en crecimiento y maduración, indicador del progreso o retroceso de una población y la transición alimentaria y nutricional y sus consecuencias, tal como la doble carga nutricional. El mestizaje, de amerindio, descendientes de africanos y de europeos, no es homogéneo, existen diferencias significativas entre regiones y entre estratos sociales. El área metropolitana de Caracas resultó diferente al resto del país, debido a: composición genética distinta, estructura demográfica y social urbana y predominio de estratos altos y medio altos. Las diferencias urbano rurales en crecimiento fueron menores que entre estratos sociales, debido a ritmos de maduración distintas. La crisis alimentaria actual puede modificar la tendencia secular, disminuir la obesidad y aumentar el déficit nutricional. Se recomienda sistematizar la información documental la cual se encuentra dispersa y no digitalizada y utilizar cualquier estudio de población para realizar proyecciones y analizar tendencias con métodos estadísticos apropiados(AU)

Variability in growth and development in Venezuela between 1939 and 2016 is the result of an historic-anthropological non-systematic, non-exhaustive review, with a focus on auxologic epidemiology. As a conceptual framework, the fundamental aspects of biological and genetic variability of growth are discussed: sexual dimorphism, variability according to the tempo of growth, the worldwide variation according to the different ethnic groups and their admixture in Venezuela. The fundamental aspects of the environment include growth differences according to altitude, yet the focus lies in auxologic epidemiology : urban-rural differences, differences according to social strata, as well as the dynamic processes such as the secular trend in growth and maturation-an indicator of the progress or recession of a population--and the Food and Nutrition Transition and its consequences, specially the double burden of nutrition. The latter could be modified by the actual food crisis: diminishing overweight and obesity and increasing current and past malnutrition, eventually affecting negatively the secular trend. Documents and sources of information should be systematized and made available in digital formats and any growth and development survey could be used in analyzing trends and outcomes if the proper statistical methods are used(AU)

Humans , Male , Female , Child , Adolescent , Adult , Social Change , Bone Development , Growth and Development , Obesity/etiology , Health Statistics , Diet, Food, and Nutrition
Acta odontol. latinoam ; 31(3): 125-130, 2018. tab, graf
Article in English | LILACS | ID: biblio-987027


In maxillary orthopedics and related areas, it is essential to determine patient growth peak in order to provide timely diagnosis and treatments. This requires the use of biological indicators that enable children and adolescents to be assigned to maturation stages. The aim of this study was to determine the correlation between cervical vertebrae maturation stages and chronological age in children and adolescents. In this study were evaluated 93 lateral cranium radiographs of 6to 17yearold patients who visited the Postgraduate Maxillary Orthopedics Clinic at the School of Dentistry at Universidad del Zulia. Two examiners made independent assessments of cervical vertebrae maturation stage using the method described by Baccetti et al. For each stage, descriptive statistics for chronological age were evaluated, classified according to sex. In addition, parametric and nonparametric tests were performed in which p <0.05 was considered significant. Mean age of the children and adolescents studied was 9.6 years, with standard deviation 2.5 years. The correlation coefficient (r=0.771) certified a high positive correlation between bone maturation and chronological age. This correlation coefficient was highly positive for girls (r=0.858) and moderately positive for boys (r=0.688). The model obtained explains 59.4 % of the variation between bone maturation and chronological age, evidencing an average age increase of three years when maturation stage increases by approximately 1 year. The results suggest that although the degree of covariance between chronological age and matu ration stages was highly positive in this study, chronological age does not allow bone maturation to be determined precisely, since it may be influenced by genetic and/or environmental factors (AU)

En ortopedia maxilar y áreas afines resulta esencial determinar el pico de crecimiento de los pacientes para establecer diagnósticos y tratamientos oportunos para lo cual es necesario utilizar indicadores biológicos, que permiten ubicar a los niños y adolescentes en estadios de maduración. El objetivo de este estudio fue determinar la correlación de los estadios de maduración de las vértebras cervicales según la edad cronológica en niños y adolescentes. Se evaluaron 93 imágenes de radiografías lateral de cráneo, de pacientes entre 6 y 17 años de edad que asistieron a la clínica del Posgrado de Ortopedia Maxilar de la Facultad de Odontología de La Universidad del Zulia, dos examinadores estimaron de forma independiente el estadio de maduración de las vértebras cervicales, utilizando el método descrito por Baccetti et al. y para cada estadio se evaluaron los estadísticos descriptivos de la edad cronológica categorizando según sexo, además se realizaron pruebas paramétricas y no paramétricas donde un p <0,05 fue considerado como significativo. La edad media de los niños y adolescentes estudiados resultó de 9,6 años y una desviación típica de 2,5 años. El coeficiente de correlación (r=0,771) certificó una correlación positiva alta entre maduración ósea y edad cronológica, igual producto se obtuvo en el caso de las niños y adolescentes del sexo femenino (r=0,858), mientras los del sexo masculino obtuvieron una correlación positiva moderada (r= 0,688). El modelo obtenido explica el 59,4 % de la variación entre maduración ósea y edad cronológica, lo cual evidencia el aumento de la edad promedio en tres años, cuando el estadio de maduración aumenta 1 año aproximadamente. Los resultados registrados sugieren que, aunque el grado de covarianza entre edad cronológica y estadios de maduración en esta investigación fue positiva alta, la edad cronológica no permite determinar con exactitud la maduración ósea, pudiendo estar influenciada por factores genéticos y/o ambientales (AU)

Humans , Male , Female , Child , Adolescent , Bone Development , Age Determination by Skeleton , Cervical Vertebrae/growth & development , Schools, Dental , Venezuela , Cross-Sectional Studies , Statistical Analysis , Age and Sex Distribution
Article in English | WPRIM | ID: wpr-719065


BACKGROUND: In this prospective cohort study, we investigated the association between fatty acid ethyl esters (FAEEs) in meconium as biomarkers of prenatal ethanol exposure and growth deficits, as birth outcomes, that constitute several of the key cardinal features of fetal alcohol syndrome. METHODS: A total of 157 meconium samples were collected from enrolled infants within 24 hours of birth, and nine FAEEs were quantified using liquid chromatography/tandem mass spectrometry. The relationships between cumulative concentrations of nine species of FAEEs in meconium and birth parameters of growth (age-sex-specific centiles of head circumference [HC], weight, and length) and respective and combined birth outcomes of growth deficits (HC ≤ 10th centile, weight ≤ 10th centile, and length ≤ 10th centile) were determined. RESULTS: Multivariate logistic regression analysis demonstrated that higher cumulative concentrations of meconium FAEEs correlated with elevated risks for HC and length, both, 10th percentile or less (adjusted odds ratio [aOR], 2.94; 95% confidence interval [CI], 1.12–7.74; P = 0.029) and HC and weight and length, all of them, 10th percentile or less (aOR, 3.27; 95% CI, 1.12–9.59; P = 0.031). CONCLUSION: The elevated cumulative FAEEs in meconium were associated with combined growth deficits at birth, specifically HC and length, both, 10th percentile or less, which might be correlated with detrimental alcohol effects on fetal brain and bone development, suggesting a plausible alcohol-specific pattern of intrauterine growth restriction.

Biomarkers , Bone Development , Brain , Cohort Studies , Esters , Ethanol , Fetal Alcohol Spectrum Disorders , Head , Humans , Infant , Infant, Newborn , Logistic Models , Mass Spectrometry , Meconium , Odds Ratio , Parturition , Prospective Studies
Article in English | WPRIM | ID: wpr-716973


Wnt/β-catenin signaling plays a critical role in the achievement of peak bone mass, affecting the commitment of mesenchymal progenitors to the osteoblast lineage and the anabolic capacity of osteoblasts depositing bone matrix. Recent studies suggest that this evolutionarily-conserved, developmental pathway exerts its anabolic effects in part by coordinating osteoblast activity with intermediary metabolism. These findings are compatible with the cloning of the gene encoding the low-density lipoprotein related receptor-5 (LRP5) Wnt co-receptor from a diabetes-susceptibility locus and the now well-established linkage between Wnt signaling and metabolism. In this article, we provide an overview of the role of Wnt signaling in whole-body metabolism and review the literature regarding the impact of Wnt signaling on the osteoblast's utilization of three different energy sources: fatty acids, glucose, and glutamine. Special attention is devoted to the net effect of nutrient utilization and the mode of regulation by Wnt signaling. Mechanistic studies indicate that the utilization of each substrate is governed by a unique mechanism of control with β-catenin-dependent signaling regulating fatty acid β-oxidation, while glucose and glutamine utilization are β-catenin-independent and downstream of mammalian target of rapamycin complex 2 (mTORC2) and mammalian target of rapamycin complex 1 (mTORC1) activation, respectively. The emergence of these data has provided a new context for the mechanisms by which Wnt signaling influences bone development.

Anabolic Agents , beta Catenin , Bone Development , Bone Matrix , Clone Cells , Cloning, Organism , Fatty Acids , Glucose , Glutamine , Lipoproteins , Metabolism , Osteoblasts , Sirolimus