Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 6.015
Filtrar
1.
J Clin Pediatr Dent ; 44(3): 185-189, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32644898

RESUMEN

Infraocclusion occurs at an early age and becomes worse with age, causing increased damage in young children. Extraction of affected teeth is the preferred treatment modality for prevention of possible complications. It is rare for a primary molar to temporarily exhibit secondary failure of eruption, followed by regeneration of full eruptive capacity. This report was written to describe two patients who experienced spontaneous eruption of an infraoccluded primary molar at approximately 7 years of age. While watchful waiting is not always a suitable treatment option, we propose that extraction be deferred until the first permanent molar erupts, unless significant problems occur.


Asunto(s)
Diente Molar , Diente Primario , Niño , Preescolar , Arco Dental , Humanos , Erupción Dental
2.
Stomatologiia (Mosk) ; 99(4): 67-70, 2020.
Artículo en Ruso | MEDLINE | ID: mdl-32692523

RESUMEN

Odontoma make up about 22% of all odontogenic tumors. Diagnosis and treatment of odontoma in children has a number of features: the variability of the clinical and X-ray picture, the appearance of signs during the period of changing teeth, retention or the difficulty of the eruption of complete teeth in the affected area. In the process of growth odontoma can cause significant deformation of the jaw bones. The delay of the change of deciduous teeth can also be regarded as a risk factor for the formation of deviations from the normal formation of the dental system in children. This article analyzes the symptoms, clinical picture and complex treatment of a 13-year-old patient with this pathology. A clinical case demonstrates the need for regular check-ups at a pediatric dentist, an x-ray examination of the jaws in order to timely detect abnormalities in the development of the dentition of the child, diagnosis and treatment of malformations and tumors in children.


Asunto(s)
Odontoma/diagnóstico por imagen , Diente Impactado , Adolescente , Niño , Humanos , Radiografía , Factores de Riesgo , Erupción Dental
3.
Odontoestomatol ; 22(35): 4-11, jul. 2020.
Artículo en Español | LILACS | ID: biblio-1102984

RESUMEN

Objetivo: Determinar la prevalencia de infraoclusión en molares primarios de niños de 7 y 8 años, Valdivia, Chile. Materiales y métodos: Estudio descriptivo de corte transversal. Se examinaron niños de 7 y 8 años en establecimientos educacionales de Valdivia. Fue evaluada la presencia y severidad de infraoclusión en molares primarios utilizando la clasificación de Brearley & McKibben. Para establecer diferencias estadísticas entre sexo y presencia de infraoclusión fue realizada la prueba de chi-cuadrado. Además un análisis de ANOVA fue utilizado para establecer diferencias entre la localización de la infraoclusión y el grado de severidad. El nivel de significancia estadística se estableció con un valor de p<0,05. Resultados: Fueron evaluados 359 niños y un 41,78% presentó infraoclusión. Según grado de severidad, 82,06% fueron leves, 15,28% moderadas y 2,66% severas. No se encontraron diferencias significativas entre sexo y presencia de infraoclusión. Se evidenciaron diferencias estadísticamente significativas al evaluar localización y grado de severidad (p<0,05). Conclusión: Existe una alta prevalencia de infraoclusión en niños de 7 y 8 años en Valdivia, Chile.


Objective: To determine the prevalence of infraocclusion in primary molars of children aged 7 and 8 in Valdivia, Chile. Materials and methods: Descriptive cross-sectional study. Children aged 7 and 8 were examined in educational institutions in Valdivia. The presence and severity of infraocclusion in primary molars was evaluated using the Brearley & McKibben classification. The chisquare test was performed to establish statistical differences between sex and presence of infraocclusion. In addition, an ANOVA test was used to establish differences between infraocclusion location and degree of severity. The level of statistical significance was established at p <0.05. Results: Of 359 children evaluated, 41.78% had infraocclusion. As per degree of severity, 82.06% of cases were mild, 15.28% moderate and 2.66% severe. No significant differences were found between sex and presence of infraocclusion. Statistically significant differences appeared when assessing location and degree of severity (p <0.05). Conclusion: There is a high prevalence of infraocclusion in children aged 7 and 8 in Valdivia, Chile


Objetivo: Determinar a prevalência de infraoclusão em molares decíduos de crianças de 7 e 8 anos, Valdivia, Chile. Materiais e métodos: Estudo transversal descritivo. Crianças de 7 e 8 anos foram examinadas em estabelecimentos de ensino em Valdivia. A presença e gravidade da infraoclusão em molares decíduos foram avaliadas pela classificação de Brearley & McKibben. Para estabelecer diferenças estatísticas entre sexo e presença de infraoclusão, foi realizado o teste do qui-quadrado. Além disso, uma análise ANOVA foi usada para estabelecer diferenças entre a localização da infra-oclusão e o grau de gravidade. O nível de significância estatística foi estabelecido com um valor de p <0,05. Resultados: 359 crianças foram avaliadas e 41,78% apresentaram infra-oclusão. De acordo com o grau de gravidade, 82,06% eram leves, 15,28% moderados e 2,66% graves. Não foram encontradas diferenças significativas entre sexo e presença de infra-oclusão. Diferenças estatisticamente significantes foram evidenciadas na avaliação da localização e do grau de gravidade (p <0,05). Conclusão: Existe uma alta prevalência de infra-oclusão em crianças de 7 e 8 anos em Valdivia, Chile


Asunto(s)
Humanos , Niño , Erupción Dental , Niño , Chile , Diente Molar
4.
J Contemp Dent Pract ; 21(3): 326-336, 2020 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-32434983

RESUMEN

AIM: This study aimed to overview and collect the current trends and techniques in managing maxillary impacted canines by retrieving recent literature, in a chronological manner from the prevention to the very late stages of treatment in adults. BACKGROUND: We performed a review on the recent literature regarding the current trends on the management of impacted canines. We have researched various types of available articles such as clinical trials and case presentations, meta- and systematic analyses, and literature reviews focusing on clinical management of impacted canines and their outcome evaluations. We adhered to those articles published within the last decade with a focus on treatment planning for impacted and displaced canines. REVIEW RESULTS: Depending on the diagnosis and its timing of it, a maxillary impacted canine can be managed by either prevention or interception, surgical opening followed by autonomous eruption or orthodontically traction, autotransplantation, and at last by removal and space closure. These techniques are elaborated one by one according to the age and severity of the diagnosis. CONCLUSION: Impaction of the canines is a manageable abnormality which is highly dependent on the timing and localization of the displaced tooth. Early detection will give the upper hand to orthodontists to engage by either prevention through extraction of deciduous canines or intercepting via assistant devices to create more space. According to the clinical situation, open or closed surgical uncovering might be required to bond an attachment. However, generally, those techniques did not show any significant clinical distinction in the outcome assessments. CLINICAL SIGNIFICANCE: These approaches are highly technique sensitive and require collaborations with other specialties. Proper diagnosis and prognosis assessment are necessary before making any decision to bring an impacted canine in alignment.


Asunto(s)
Maxilar , Diente Impactado , Adulto , Diente Canino , Humanos , Ortodoncistas , Erupción Dental
5.
PLoS One ; 15(5): e0233059, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32433687

RESUMEN

Complex extracellular structures exist throughout phylogeny, but the dynamics of their formation and dissolution are often opaque. One example is the pharyngeal grinder of the nematode Caenorhabditis elegans, an extracellular structure that ruptures bacteria during feeding. During each larval transition stage, called lethargus, the grinder is replaced with one of a larger size. Here, we characterize at the ultrastructural level the deconstruction of the larval grinder and the construction of the adult grinder during the fourth larval stage (L4)-to-adult transition. Early in L4 lethargus, pharyngeal muscle cells trans-differentiate from contractile to secretory cells, as evidenced by the appearance of clear and dense core vesicles and disruptions in sarcomere organization. This is followed, within minutes, by the dissolution of the L4 grinder and the formation and maturation of the adult grinder. Components of the nascent adult grinder are deposited basally, and are separated from the dissolving larval grinder by a visible apical layer. The complete grinder is a lamellated extracellular matrix comprised of five layers. Following grinder formation, pharyngeal muscle cells regain ultrastructural contractile properties, and muscle contractions resume. Our findings add to our understanding of how complex extracellular structures assemble and dissemble.


Asunto(s)
Caenorhabditis elegans/fisiología , Muda , Erupción Dental , Animales , Caenorhabditis elegans/ultraestructura , Proteínas de Caenorhabditis elegans/metabolismo , Larva , Metaloendopeptidasas/metabolismo , Microscopía Electrónica de Transmisión , Músculos Faríngeos/ultraestructura , Sueño , Imagen de Lapso de Tiempo
6.
Sci Total Environ ; 723: 138107, 2020 Jun 25.
Artículo en Inglés | MEDLINE | ID: mdl-32392674

RESUMEN

BACKGROUND: The influence of prenatal heavy metals exposure on primary tooth eruption in humans is rarely reported. AIM: Based on the cohort study design, we investigated the association of exposure to 12 heavy metals in the first trimester with primary tooth eruption, and the maternal metabolisms in the first trimester which might be related to the above relationship. METHODS: Maternal urine samples were collected in their first trimester, and 12 metals (Ti, V, Fe, Co, Cu, As, Se, Cd, Sn, Hg, Tl, U) were measured using the inductively coupled plasma mass spectrometry method. The maternal metabolome in the first trimester was analyzed by ultrahigh performance liquid chromatography coupled mass spectrometry based metabolomics using urine samples. The infant's first tooth eruption time and number of teeth at age one were recorded by oral examination and questionnaire. RESULTS: No significant associations were observed between heavy metals exposure in the first trimester and primary tooth eruption, except for Co. The level of Co was positively associated with time of infant's first tooth eruption, and was negatively associated with the number of teeth at age one. Based on metabolomic profiling, glycine was revealed as the key mediating metabolite, which showed negative correlation with Co and opposite effect of Co in the primary tooth eruption. CONCLUSIONS: Prenatal Co exposure in the first trimester might delay the primary tooth eruption in children through the decreased glycine-disrupted dentin formation, providing the first evidence and novel insights into the control of prenatal heavy metals exposure for ensuring normal (timely) primary tooth eruption.


Asunto(s)
Metales Pesados , Erupción Dental , Niño , Estudios de Cohortes , Femenino , Humanos , Lactante , Metabolómica , Embarazo , Diente Primario
7.
J Orofac Orthop ; 81(4): 249-257, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32435863

RESUMEN

PURPOSE: The aim of this study was to compare the mandibular posterior space in subjects with skeletal class II division 1 and division 2 malocclusions in two different age groups. METHODS: Pretreatment cephalometric radiographs of 160 patients from 9 to 13 years of age (n = 80) and 15 to 18 years of age (n = 80) with class II division 1 or division 2 malocclusion were used for the study. Equal numbers of male and female patients (n = 20) were included in the two age groups in each of the malocclusion groups. Eight linear and six angular measurements were taken for mandibular posterior space evaluation. The data obtained from the study were compared using the independent t-test. RESULTS: In the present study, the mandibular posterior space was greater in both malocclusion groups in subjects aged 15-18 years than in those aged 9-13 years (p < 0.05). The available posterior spaces behind the mandibular first molars were 4.4 mm and 6.3 mm in females (class II divisions 1 and 2, respectively) and 5.3 mm and 7 mm in males (class II divisions 1 and 2, respectively) in the 9­ to 13-year-old age group. This space increased significantly by 6.9 mm (p < 0.001) and 3.2 mm (p < 0.01) in females (class II division 1 and 2, respectively) and 3.8 mm (p < 0.01) and 3 mm (p < 0.01) in males (class II division 1 and 2, respectively) in the 15- to 18-year-old age group. CONCLUSION: Class II division 1 and division 2 malocclusions had similar and inadequate posterior space dimensions for the eruption of the third and an unknown portion of the second molars.


Asunto(s)
Maloclusión de Angle Clase II , Maloclusión , Adolescente , Cefalometría , Niño , Femenino , Humanos , Masculino , Mandíbula , Erupción Dental
8.
Int J Esthet Dent ; 15 Suppl 1: S88-S97, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32467939

RESUMEN

It is common knowledge that dental implants should not be inserted in adolescents, before completion of skeletal growth, because they behave as ankylosed teeth and remain in a fixed position while the surrounding bone and teeth are still developing, with consequential worsening esthetic damage. However, there is growing evidence that this phenomenon may continue throughout life in a large number of adult patients, although with a great variability in onset, progression, and extent. Infraocclusion and interproximal contact loss are the more common complications, and the majority of clinically significant cases are located in the anterior maxilla. The esthetic impact is mostly minimal, but in some cases the patient's smile may be severely compromised. Therefore, adult patients need to be informed when dental implants are considered to replace anterior missing teeth.


Asunto(s)
Pérdida de Hueso Alveolar , Implantes Dentales de Diente Único , Adolescente , Adulto , Implantación Dental Endoósea , Estética Dental , Humanos , Incisivo , Maxilar , Erupción Dental
9.
Orthod Craniofac Res ; 23(3): 351-356, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32248634

RESUMEN

OBJECTS: Palatally displaced canines (PDC) might represent condition causing several clinical problems, such as roots resorption and malocclusion, and can develop palatal canine impaction. Some interceptive treatments such as rapid maxillary expansion were suggested in order to foster maxillary canine eruption. Among expansion protocols, no data are available about differences between rapid and slow maxillary expansion on maxillary canine eruption. The aim of this study was therefore to evaluate α-angle changes in palatally displaced canines using rapid and slow maxillary expansion compared to untreated control patients. SETTING AND SAMPLE POPULATION: The final sample comprised 19 patients treated with rapid maxillary expansion (RME group), 17 treated with slow maxillary expansion (SME group) and 22 control patients (Control group). MATERIALS AND METHODS: α-angle was measured on panoramic films to detect canine inclination at the beginning, and at the end of maxillary expansion treatment or observation, time and changes over time were compared. RESULTS: In the comparisons among groups, RME group was the only group showing a decrease in α-angle measurements that was statistically significant also when compared to the other groups, except for the left side when compared to SME group. CONCLUSION: RME treatment significantly and positively affected canine position when compared to SME treatment and control group.


Asunto(s)
Arco Dental , Técnica de Expansión Palatina , Diente Canino , Humanos , Maxilar , Erupción Dental
10.
Rev. cient. odontol ; 8(1): e009-e009, ene.-abr. 2020. ilus.
Artículo en Español | LILACS, LIPECS | ID: biblio-1095507

RESUMEN

La erupción dental es un proceso dinámico que se inicia cuando se forma el germen dentario en su cripta de desarrollo hasta que el diente hace su aparición en boca. El folículo dental tiene un papel importante en la formación coronal y radicular del diente, y es esencial para la erupción dentaria. Para que un diente entre en erupción es necesario que exista resorción del hueso alveolar que cubre la corona del diente, de modo que se forme un camino a través del cual el diente se moverá. Para esto, se producen una serie de procesos moleculares y celulares localizados y programados genéticamente que permiten la osteogénesis y la osteoclastogénesis del hueso alveolar a fin de formar la vía de erupción. El objetivo de esta revisión es dar a conocer los posibles eventos celulares y moleculares que influyen en el proceso de erupción dentaria, ya que el mecanismo exacto aún es desconocido. (AU)


Dental eruption is a dynamic process, which begins when the dentary germ forms in the developmental crypt and finally appears in the mouth. The dental follicle has an important role in the coronal and root formation of the tooth and is essential for tooth eruption, without which the tooth could not erupt. Tooth eruption requires resorption of the alveolar bone that covers the crown of the tooth to form a path to the eruption and biological processes by which the tooth can move through this eruption path. Tooth eruption needs localized and genetically programmed molecular and cellular processes that allow osteogenesis and osteoclastogenesis of the alveolar bone to form the eruption path. The objective of this review was to describe the possible cellular and molecular events that influence the tooth eruption process, since the exact mechanism remains unknown. (AU)


Asunto(s)
Humanos , Erupción Dental , Moléculas de Adhesión Celular
11.
Wiad Lek ; 73(2): 342-351, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32248172

RESUMEN

OBJECTIVE: The aim: The article deals with analyzing the influence of polymorphic variants of CYP19A1 [rs2414096, rs936306], ESR1 [rs2234693, rs9340799], IL1 [rs1143627], IL6 [rs1800796], IL10 [rs1800896] and RANKL [rs959389] genes on deciduous tooth eruption terms in individuals born macrosomic. PATIENTS AND METHODS: Materials and methods: 171 individuals participated in the multi-stage study (144 macosomic-at-birth individuals and 27 normosomic-at-birth persons). This study included only persons who have preserved information about the timing of deciduous tooth eruption - 159 persons (aged from 4 to 55 years), male and female (male / female ratio was 1.5 / 1). RESULTS: Results and conclusions: The presence of the G allele in CYP19A1 [rs2414096] gene and the -351 A allele in ESR1 [rs9340799] gene were found to be risk factors for fetal macrosomia formation. The research revealed an association of RANKL [rs9594759] gene variants which is a multiplicative model of inheritance and IL-10 [rs1800896], an overdominant model of inheritance, with an increased risk of tooth delay. Besides the variants of RANKL [rs9594759] and IL-10 [rs1800896] genes a multidirectional modifying effect on the timing of tooth eruption in macrosomic-at-birth individuals made the variant of CYP19A1 [rs2414096] gene - a significant dominant and over-dominant model of inheritance. Further analysis of intergenic interactions will facilitate the application of the obtained results in clinical practice by creating a molecular profile of individuals with deviations in the tooth eruption timing.


Asunto(s)
Interleucina-10/genética , Ligando RANK/genética , Erupción Dental , Adolescente , Adulto , Niño , Preescolar , Femenino , Macrosomía Fetal , Humanos , Masculino , Persona de Mediana Edad , Polimorfismo Genético , Embarazo , Diente Primario , Adulto Joven
12.
J Clin Pediatr Dent ; 44(2): 127-129, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32271660

RESUMEN

Migration describes the movement of an unerupted tooth within the bone when normal eruption is prevented and the tooth leaves its normal site of development. This report describes a case of distal migration and ectopic eruption of the mandibular first premolar in an 8.5-year-old boy. Following early extraction of the primary second molar, the first premolar migrated distally through the extraction site of the primary second molar and erupted into occlusion just mesial of the permanent first molar.


Asunto(s)
Erupción Ectópica de Dientes , Diente no Erupcionado , Diente Premolar , Niño , Humanos , Masculino , Diente Molar , Erupción Dental , Diente Primario
13.
Int Dent J ; 70(3): 155-160, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32149398

RESUMEN

INTRODUCTION: Dental trauma and congenital anodontia are common causes of anodontia in the anterior maxilla. The proposed restorative treatment constitutes a challenge for many dentists, particularly if it is a question of a young patient who has not yet completed skeletal and dental development. Current treatments for anterior maxillary anodontia include: fixed or removable partial dentures; orthodontic closure of interdental spaces; and dental implants. Dental implants do not move with the dento-alveolar complex during the growth period of the maxilla. Therefore, many researchers maintain that implants should be postponed until after adolescence, in order to prevent complications, such as infra-occlusion, that would require the replacement of the abutment and crown-implant restoration, or even invasive treatments, such as the removal of the implant in the future. The objective of this literature review is to investigate the aetiology of the phenomenon, and outcome. RESULTS: Continuous tooth eruption is not affected by age, so considerable changes may occur due to eruption of adjacent teeth. In addition, both women and men are affected by this phenomenon and, usually, there is no significant difference in the amount of growth between the short face and the long face. CONCLUSION: It can be concluded that continuous facial skeletal growth and teeth eruption are evident in the second and third decades. Where possible, it is advisable to delay placement of an anterior maxillary implant in the adolescent patient.


Asunto(s)
Implantación Dental Endoósea , Maxilar , Adolescente , Coronas , Femenino , Humanos , Incisivo , Masculino , Erupción Dental
14.
Stomatologiia (Mosk) ; 99(1): 66-69, 2020.
Artículo en Ruso | MEDLINE | ID: mdl-32125305

RESUMEN

INTRODUCTION: The global objectives of WHO in the field of oral health by 2020 include the average intensity of caries among 12-year-old children no more than 1.5 by the DMFT index. In Samara the value of the DMFT among the adolescents at age 12 is 3.5. AIM: To identify the appropriate timing for a launching of community-based schemes of dental caries prevention of permanent teeth for children of Samara. MATERIAL AND METHODS: In a cross-sectoral multisample research from March to May 2017, the time of eruption and intensity of caries of the first permanent molars among children in Samara were studied. A total of 405 children aged 5 to 8, attending preschool and school educational institutions were examined. The quantity and the stage of eruption of the first permanent molars were assessed; the initial and manifest forms of caries were considered during the calculation of indexes of caries intensity of teeth and surfaces. RESULTS: One to four first permanent molars were erupted among 26.3% of children aged 5, at an average 0.6±0.14 per one surveyed, the prevalence of caries of the first permanent molars was equal to 1.3%, including 1.3% of the initial carious defeats. In 6-year-old children - 65% had the first permanent molars, at an average of 2.38±0.199, and the prevalence of caries in these teeth was 29.63%, including initial forms of caries 27.16%. The results among 7-year-old children - 87.18% and 3.12±0.156, 60.3% and 51.28%, respectively. In 8-year-old children these figures were equal: 97.26%, 3.79±0.091, 68.49% and 60.27%, respectively. The rate of eruption of the first permanent molars and the prevalence of their carious lesions among girls was significantly higher than among boys. CONCLUSION: The optimal age of children of Samara for inclusion in the regional programs of dental caries prevention is the age of 4 years - the age of the beginning of the first permanent molar eruption.


Asunto(s)
Caries Dental , Adolescente , Niño , Preescolar , Dentición Permanente , Femenino , Humanos , Masculino , Diente Molar , Salud Bucal , Erupción Dental
15.
J Dent Child (Chic) ; 87(1): 26-30, 2020 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-32151307

RESUMEN

Purpose: To evaluate parental knowledge of the importance of the permanent first molar (PFM).
Methods: Three hundred and eighty parents filled a 22-item questionnaire assisted by a trained investigator. They were asked to indicate the correct answer from the given list of options in order to assess their awareness about the eruption sequence of primary and permanent teeth and the importance of PFMs. Assessment of parental attitude toward preventive management and treatment of carious or infected permanent teeth was done, together with their willingness to comply with the treatment options suggested for such teeth. The sequelae of caries in PFM and their effect on the growth and development of the face and jaws were assessed as well.
Results: Seventy-five percent and 72.4 percent of parents responded correctly about the number of primary and permanent teeth. When parents were asked about the chronology of tooth eruption, 53.9 percent of parents thought that the PFM erupted between 10 and 12 years of age. Almost 65 percent of the parents said they would start brushing their child's teeth after all the primary teeth erupt. Forty-five percent agreed to the extraction of PFMs, considering them to be primary teeth, as they felt unnecessary to treat a carious tooth that was going to exfoliate.
Conclusion: Parents often based their decision for dental treatment choices for their children on lack of information as they were unaware about the eruption and importance of PFM. There is a need to emphasize the importance of PFM during interaction with parents.


Asunto(s)
Caries Dental , Diente Molar , Niño , Dentición Permanente , Humanos , Padres , Erupción Dental , Diente Primario
16.
J Dent Child (Chic) ; 87(1): 44-47, 2020 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-32151310

RESUMEN

Ameloblastic fibro-odontoma (AFO) is a rare, benign, and mixed odontogenic tumor that consists of both ectodermal and mesenchymal elements. AFO is more prevalent in young children and adolescents than in adults and is usually found in the molar area associated with a failure of tooth eruption. The purpose of this report is to discuss the differential diagnosis and treatment of a three-year-old girl diagnosed with an AFO around a primary canine. The manifestations of the lesion resembled localized periodontal disease caused by an enamel pearl. Excision and curettage were done and the separated dental hard tissue was confirmed from the enamel structure of the primary canine. In addition to the hard tissue, pulpy and soft tissues were removed together and were histologically examined, confirming the diagnosis of AFO.


Asunto(s)
Neoplasias Mandibulares , Tumores Odontogénicos , Odontoma , Adolescente , Niño , Preescolar , Esmalte Dental , Femenino , Humanos , Diente Molar , Erupción Dental
17.
J Dent Child (Chic) ; 87(1): 53-57, 2020 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-32151312

RESUMEN

Burkitt lymphoma (BL) is a rare and aggressive malignant neoplasm frequently involving the jawbones in children. The main purpose of this article is to report the case of a nine-year-old boy with widespread BL diagnosed through oral findings. The patient was referred after complaining of dental mobility for two weeks. The physical examination revealed premature eruption of permanent teeth. The periapical radiographic examination showed a diffuse bone rarefaction in the involved area. An incisional biopsy was performed, leading to the diagnosis of BL. The patient was then treated with chemotherapy and is free of disease after an 18-month follow-up. The main signs and symptoms of an oral BL could mimic a dental problem, thus it is extremely important to be knowledgeable about this disease, which can be fatal without early diagnosis and treatment.


Asunto(s)
Linfoma de Burkitt , Biopsia , Niño , Dentición Permanente , Humanos , Masculino , Erupción Dental
18.
Zhonghua Er Ke Za Zhi ; 58(3): 206-212, 2020 Mar 02.
Artículo en Chino | MEDLINE | ID: mdl-32135592

RESUMEN

Objective: To investigate the timing of permanent tooth emergence and its association with physical growth among children aged 4-7 years in 9 cities of China, and to analyze the trend of permanent teeth development. Methods: According to a stratified cluster sampling design, a cross-sectional survey on the timing of permanent tooth emergence children aged 4-7 years was carried out in 9 cities (Beijing, Harbin and Xi'an in northern China; Shanghai, Nanjing and Wuhan in central China; Guangzhou, Fuzhou and Kunming in southern China) from June to October in 2015. A total of 37 973 children (19 035 boys and 18 938 girls) were recruited and were divided into different age groups (4.0-<4.5, 4.5-5.0, 5.0-5.5 and 6.0-<7.0 years of age). The situation of the exfoliation of primary teeth and the eruption of permanent teeth were investigated. Height and weight were measured using the standardized methods. Z-scores of physical growth indicators were calculated using the growth standards for Chinese children in 2009. Probit regression analysis was used to determine the median and percentile age of transition from deciduous to permanent teeth. Chi-square test was used for comparison of categorical data and t test was used for comparison of measurement data between boys and girls, urban and suburban as well as among different ages and regions. Meanwhile, the data from the national survey on physical growth and development of children under 7 years of age in 9 cities of China in 1995 were used to analyze the trends of the permanent teeth development. Results: The rate of transition from deciduous to permanent teeth in 37 973 children aged 4-7 years was higher with age, which was 0.6% (42/7 568) in 4.0-<4.5 years of age group, 30.3% (2 295/7 583) in 5.5-<6.0 years of age group, and 74.5% (5 680/7 627) in 6.0-<7.0 years of age group. The rates of transition from deciduous to permanent teeth in boys were all lower than those of girls except for children aged 4.0-<4.5 years (all P<0.01). The rate of transition from deciduous to permanent teeth in urban children was higher than that in suburban children for older than 5.5-6.0 years of age group in boys and older than 4.5-5.0 years of age group in girls, which was 74.2% (1 427/1 924) in urban boys aged 6.0-<7.0 years and 69.2% (1 305/1 885) in suburban boys aged 6.0-<7.0 years (χ(2)=11.446, P<0.01). The age of transition from deciduous to permanent teeth was 6.00 (95%CI: 5.98-6.01) years and the range of the 3-97 percentile was 4.88-7.11 years of age. The median permanent tooth emergence age of girls was lower than that of boys (5.94 vs. 6.06 years) and the median age of urban children was lower than that of suburban children (5.94 vs. 6.05 years). The median permanent tooth emergence age of southern Chinese children (6.05 years) was higher than that of northern (5.97 years) and central Chinese children (5.97 years). The weight for age Z-scores (WAZ), height for age Z-scores (HAZ) and body mass index for age Z-scores (BMIZ) of children with transition from deciduous to permanent teeth (0.35±1.17, 0.32±1.00, 0.23±1.16) were significantly higher than those of children without transition from deciduous to permanent teeth (0.03±1.13, 0.03±1.02, 0.04±1.13, t=20.81,21.67,12.09, all P<0.05). In comparison with the data in 1995, data in 2015 showed that the rate of transition from deciduous to permanent teeth was higher, for example, the rate of urban boys aged 6.0-<7.0 years group was 63.8% (1 146/1 796) in 1995, and increased to 74.2% (1 427/1 924) in 2015 (χ(2)=46.748, P<0.01). The median permanent tooth emergence age decreased by 0.24 years in 2015 as compared with that in 1995. Conclusions: The development of permanent teeth is earlier in girls than in boys, earlier in urban children than in suburban children and slightly delay in southern children than in central and northern Chinese children. In addition, the development of permanent teeth, which is related to the physical growth, slightly accelerate in China during the past 20 years.


Asunto(s)
Estatura/fisiología , Erupción Dental , Diente Primario , Peso Corporal , Niño , Preescolar , China , Ciudades , Estudios Transversales , Femenino , Humanos , Masculino , Encuestas y Cuestionarios
20.
Am J Orthod Dentofacial Orthop ; 157(3): 287, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-32115105
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA