ABSTRACT
El objetivo de este estudio fue comparar el tiempo empleado al estimar la edad dental (ED) entre el método propuesto por Demirjian et al. y el cuadro integral del enfoque de Demirjian (DAEcc) utilizando radiografías panorámicas digitales de individuos peruanos de 5 a 13 años residentes en Lima. Se realizó un estudio no experimental, comparativo, transversal y retrospectivo. Se utilizaron 100 radiografías panorámicas digitales que presentaban siete dientes permanentes mandibulares izquierdos. Una odontóloga forense capacitada y calibrada determinó el tiempo utilizado en evaluar la maduración dental y la estimación de ED con dos métodos (Demirjian y DAEcc). La unidad de medida utilizada fue los minutos (min.). No hubo diferencias en el tiempo de evaluación del estadio de maduración dental entre ambos métodos (p<0,05). El tiempo para estimar ED fue estadísticamente inferior con DAEcc (2,09 min) que con Demirjian (4,19 min). La diferencia del tiempo total de evaluación resultó estadísticamente significativa entre ambos métodos (Δ2,1 min.; 2,05-2,11; p=0,000). La aplicación del DAEcc redujo en 50 % el tiempo empleado en estimar ED en comparación con los cuadros propuestos por Demirjian. Aunque la odontología forense se centra en el estudio de la eficacia de estimación de la edad, es necesario abordar también su uso práctico.
SUMMARY: The objective of this study was to compare the time used to estimate dental age (DA) between the method proposed by Demirjian et al., and the comprehensive chart for dental age estimation (DAEcc) using digital panoramic radiographs of Peruvian individuals aged 5 to 13 years residing in Lima. A non- experimental, comparative, cross-sectional and retrospective study was carried out. 100 digital panoramic radiographs showing seven mandibular left permanent teeth were used. A trained and calibrated forensic odontologist determined the time used to assess tooth maturation and DA estimation with two methods (Demirjian and DAEcc). The unit of measurement used was minutes (min.). There were no differences in the evaluation time of the dental maturation stage between both methods (p<0.05). The time spent to estimate DA was statistically less with DAEcc (2.09 min) than with Demirjian (4.19 min). The difference in total evaluation time was statistically significant between both methods (Δ2.1 min; 2.05-2.11; p=0.000).The application of DAEcc reduced by 50 % the time spent estimating DA compared to the method proposed by Demirjian. Although forensic odontology focuses on the study of the effectiveness of age estimation, its practical use needs to be addressed as well.
Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Tooth/diagnostic imaging , Age Determination by Teeth/methods , Forensic Dentistry , Peru , Time Factors , Tooth/growth & development , Radiography, Panoramic , Pilot Projects , Cross-Sectional Studies , Retrospective StudiesABSTRACT
ABSTRACT Objective: To explore the association between chronological, dental and skeletal ages and early diagnosis of third molars agenesis. Material and Methods: This retrospective radiographic study comprised a sample of 282 Portuguese patients (122 males and 160 females) who sought orthodontic treatment between 2007 and 2018. Each participant had panoramic and lateral cephalometric radiographs performed before and after the age of 14 years. The chronological age was categorized into three intervals between 11.0 and 13.11 years of age. The full eruption of the four-second molars was used as a criterion in determining dental age. Skeletal age was verified by the vertebral maturation method. The diagnosis of agenesis of third molars was initially performed by observation of the initial panoramic radiography undertaken before the age of 14 years. Subsequently, the diagnosis of agenesis of third molars was confirmed by visualizing the second panoramic radiography, obtained after the age of 14 years. The association between the accuracy of the diagnosis and the chronological, dental and skeletal ages was evaluated using the chi-square test, at a 5% significance level. Results: No significant association between chronological age and alterations in the diagnosis of third molar agenesis was identified. However, there was a significant association between third molar agenesis and both dental age (p<0.001) and skeletal age (p=0.006). Conclusion: The eruption of the four-second molars and the peak of growth could be considered as criteria for early diagnosis of third molar agenesis, whereas chronological age is not a reliable diagnostic indicator.
RESUMO Objetivo: Explorar a associação entre as idades cronológica, dentária e esquelética e o diagnóstico precoce da agenesia dos terceiros molares. Material e Métodos: Este estudo radiográfico retrospectivo compreendeu uma amostra de 282 pacientes portugueses (122 homens e 160 mulheres) que procuraram tratamento ortodôntico entre 2007 e 2018. Cada participante tinha radiografias panorâmicas e cefalométricas laterais realizadas antes e depois dos 14 anos de idade. A idade cronológica foi categorizada em três intervalos entre 11,0 e 13,11 anos de idade. A erupção completa dos quatro segundos molares foi usada como critério para determinar a idade dentária. A idade esquelética foi verificada pelo método de maturação das vértebras cervicais. O diagnóstico de agenesia de terceiros molares foi inicialmente realizado pela observação da radiografia panorâmica inicial, realizada antes dos 14 anos de idade. Posteriormente, o diagnóstico de agenesia de terceiros molares foi confirmado pela visualização da segunda radiografia panorâmica, obtida após os 14 anos de idade. A associação entre a acurácia do diagnóstico e as idades cronológica, dentária e esquelética foi avaliada por meio do teste qui-quadrado, com nível de significância de 5%. Resultados: Não foi identificada associação significativa entre idade cronológica e alterações no diagnóstico de agenesia de terceiros molares. No entanto, houve associação significativa entre agenesia de terceiro molar e idade dentária (p<0,001) e idade óssea (p=0,006). Conclusão: A erupção dos quatro segundos molares e o pico de crescimento podem ser considerados critérios para o diagnóstico precoce da agenesia do terceiro molar, enquanto a idade cronológica não é um indicador diagnóstico confiável.
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SUMMARY: The objective of this review was to identify original studies describing radiographic methods for dental age estimation applied in Chilean children, considering that it is a country with a long history of natural disasters and it has shown an unprecedented increase in the number of migrants in recent years, with significant percentages of individuals under 18 years of age. A scoping review was carried out following the methodology for the Joanna Briggs Institute scoping reviews and PRISMA guidelines. A specific search strategy was implemented in PubMed/Medline database, with complementary use of the Google Scholar website searching for full articles in English and Spanish. Five documents responded to the search objective, of which only 3 were published in refereed journals. Two documents focused their study on the maturation of upper and lower third molars, one on the maturation of the second and lower third molars, and two documents on the maturation of the seven mandibular teeth according to classical methodologies. The scarce existing literature, the almost absence of validated methods for the Chilean population, as well as the reported mass immigration phenomenon make a new and profound scientific research approach necessary for the application of updated methods.
RESUMEN: El objetivo de esta revisión fue identificar estudios originales que describan métodos radiográficos para la estimación de la edad dental aplicados en niños chilenos, considerando que Chile es un país con una larga historia de desastres naturales y que ha mostrado un aumento sin precedentes en el número de inmigrantes en los últimos años, con porcentajes significativos de individuos menores de 18 años. Se llevó a cabo una revisión con búsqueda sistemática siguiendo la metodología del Instituto Joanna Briggs y las pautas PRISMA. Se implementó una estrategia de búsqueda específica en la base de datos PubMed/Medline, con uso complementario de Google Scholar, buscando artículos completos en inglés y español. Cinco documentos respondieron al objetivo de búsqueda, de los cuales solo 3 fueron publicados en revistas arbitradas. Dos documentos centraron su estudio en la maduración de los terceros molares superiores e inferiores, uno en la maduración de los segundos y terceros molares inferiores y dos documentos en la maduración de los siete dientes mandibulares según metodologías clásicas. La escasa literatura existente, la casi ausencia de métodos validados para la población chilena, así como el fenómeno de inmigración masiva reportado, hacen necesario un nuevo y profundo enfoque de investigación científica para la apli- cación de métodos actualizados.
Subject(s)
Humans , Age Determination by Teeth/methods , Radiography, Dental , Emigration and Immigration , Forensic Dentistry , ChileABSTRACT
Aim: The aim of this comparative study was to estimate the dental age using Willems method by assessing the developmental stages of left seven permanent mandibular teeth in 7–14 years of age groups with the help of digital orthopantomogram and comparing it with Demirjian's method to conclude which method was more appropriate and better in Indian population of Uttarakhand region. Materials and Methods: A total of 100 digital orthopantomogram films of patients in the age group of 7-14 years was collected over the study period of 3 years from July 2014 to January 2017 and was equally distributed by convenience sampling. Group I included 50 boys and Group II included 50 girls aging 7–14 years of age (as permanent 7 teeth in the 3rd quadrant were to be assessed and scored according to the Demirjian's table, the 7–14 age group was selected). The date of birth of the subject was documented against their allocated identification number. Dental age according to Willem's method was calculated using Willem's table and Demirjian and Goldstein's table scores were used to calculate dental age by Demirjian's method. Results: Willems method was more accurate and better than Demirjian's method as it showed less mean percentage error, i.e., 0.34% as compared to 15.94% obtained from Demirjian's method in Group II and 2.19% as compared to 8.05% obtained from Demirjian's method in Group I. Conclusion: The results suggested that Willems method of dental age estimation was an effective method of age estimation and was better and more accurate than Demirjian's method.
ABSTRACT
Background: Age estimation through dental maturity indicators is relatively more accurate, reliable, and valid for living as well as dead individuals. It acts as an important tool in diagnosis and treatment planning in clinical as well as in forensic dentistry. There are various methods to estimate the dental age. Out of which, Demirjian's method has been widely used in various populations. However, there is a dearth of literature on Indian population comparing Demirjian's method to Cameriere's method. Aim: The purpose of this study was to evaluate the accuracy of Demirjian's and Cameriere's age estimation methods to chronological age in growing children using orthopantomograph (OPG). Setting and Design: The sample consisted of digital OPGs of 280 children in Navi Mumbai aged 5–16 years. Materials and Methods: Digital OPGs were used to assess the dental maturity of seven mandibular left teeth using Demirjian and Cameriere's method and were compared to the chronological age. Statistical Analysis Used: Data were analyzed using Student's t tests. Result: Irrespective of gender, dental age estimated by Cameriere's method (mean 10.23 ± 2.79 years), underestimated the chronological age (mean 11.74 ± 2.86 years) for overall population which showed statistically significant difference. Demirjian's method overestimated (mean 12.24 ± 3.06 years) the chronological age for the overall population but was statistically insignificant. Conclusion: Demirjian's method is more closely in correlation with the chronological age of growing children as compared to the Cameriere method when applied to children of age 5–16 years in Navi Mumbai.
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Dentists may encounter patients with numerical dental anomalies in clinical practice and understanding of these conditions would allow early detection as well as intervention. The absence of one or more teeth congenitally is referred as hypodontia. This dental anomaly is rarely reported in primary dentition and the most commonly affected teeth in the primary dentition are mandibular lateral incisors and primary canines are remarkably very rare and this entity has not been often reported. This case study was aimed to report a 3-year-old Indian girl with the absence of three canines primary dentition and also evaluate the overall dental development pattern of developing permanent teeth. Furthermore, a new finding for pediatric dentists that the development of permanent canines in case of missing primary canines.
ABSTRACT
El desarrollo de los dientes representa el criterio más utilizado para estimar la edad en niños y adultos jóvenes. El método de Cameriere et al., aceptado y validado internacionalmente, evalúa radiográficamente la edad dental a través de mediciones de dientes con el ápice abierto y la aplicación de ecuaciones de regresión específicas. En el presente estudio se analizaron 7 dientes mandibulares (excepto los terceros molares) en 122 radiografías panorámicas digitales mediante el programa ImageJ, de una muestra de ciudadanos argentinos de 5 a 19 años (63 masculinos y 54 femeninas) con el objetivo de evaluar la precisión del método propuesto por Cameriere et al. Se registraron los datos de sexo y edad de las ortopantomografías en forma ciega de la base de datos. Se desarrollaron modelos de regresión lineal para la estimación de la edad. Los resultados demostraron que el sistema es confiable para la estimación de la edad en la población estudiada, con un error absoluto medio de 0.014 años entre edades cronológicas y estimadas (p=0,603). Hubo una ligera tendencia a sobreestimar las edades de 5 a 10 años y a subestimar las edades de 11 a 16 años. Se considera apropiado efectuar nuevas investigaciones para obtener mayores conclusiones y contribuir a la estandarización del método Cameriere con fines forenses en Argentina (AU)
Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Adult , Age Determination by Teeth , Forensic Dentistry , Argentina/epidemiology , Reference Standards , Radiography, Panoramic , Logistic Models , Dental Service, Hospital , Age and Sex DistributionABSTRACT
El objetivo de este trabajo fue estudiar la maduración de dientes permanentes en niños venezolanos entre tres y seis años de edad y su aplicabilidad en la estimación de la edad dental (ED) con fines forenses. Se realizó un estudio descriptivo, retrospectivo, transversal y de campo. La muestra consistió en 107 radiografías panorámicas de individuos venezolanos (56 mujeres y 51 hombres). Se asignaron los estadios de maduración a los dientes permanentes de los cuatro cuadrantes de acuerdo al método de Demirjian et al. (1973) original, mientras que la ED fue calculada por el método de Demirjian et al. y sus modificaciones (Demirjian & Goldstein, 1976), Willems et al. (2001) y Chaillet et al. (2005). Las mujeres alcanzaron los estadios de maduración a edades más tempranas que los hombres. Se observó en el total de la muestra la sobre-estimación de la edad cronológica (EC) por todos los métodos, siendo el método de Chaillet et al. el más preciso. Al estudiar los sexos por separado, el método de Chaillet et al. presentó la menor diferencia EC-ED para los hombres y el de Chaillet et al. en las mujeres. El método de Demirjian et al., original mostró la mayor diferencia EC-ED para ambos sexos. Los métodos de Chaillet et al. y Willems et al., son aplicables con fines de determinación de la edad en la muestra estudiada, siendo su utilidad dependiente del sexo.
The objective of this work was to study the maturation of permanent teeth in Venezuelan children between three and six years, and its applicability in the estimation of dental age (DA) for forensic purposes. A descriptive, retrospective, cross-sectional and field study was carried out. The sample consisted of 107 panoramic radiographs of Venezuelan individuals (56 females and 51 males). The stages of maturation were assigned to the permanent teeth of the four quadrants according to the original Demirjian et al. (1973) method, while the DA was calculated by Demirjian´s et al. method and its modifications (Demirjian & Goldstein, 1976), Willems et al. (2001) and Chaillet et al. (2005). It was found that females reached the maturation stages at younger ages than males. The overestimation of the chronological age (CA) by all methods was observed in the total sample, being the method of Chaillet et al., the most accurate. When studying the sexes separately, the method of Chaillet et al., presented the lowest CA-DA difference for males and Chaillet et al., in females. The method of Demirjian et al., showed the greatest CA-DA difference for both sexes. The methods of Chaillet et al. and Willems et al. are applicable for age determination purposes in the studied sample, its utility being sex dependent.
Subject(s)
Humans , Male , Female , Child, Preschool , Child , Age Determination by Teeth/methods , Dentition, Permanent , Forensic Dentistry , Venezuela , Radiography, Panoramic , Cross-Sectional Studies , Retrospective StudiesABSTRACT
OBJECTIVE@#To investigate the correlation between morphological stages of midpalatal suture (MPS) and Demirjian dental age.@*METHODS@#In this retrospective study, 1 076 cone-beam CT (CBCT) images (female: 675, male: 401; age range: 6.0 to 21.0 years) were included. Horizontal view of each sample's CBCT images was observed, each sample's MPS stage was recorded, and dental age. MPS stage and dental age were ordered with categorical variables. Therefore, their correlation was investigated through Spearman correlation coefficient analysis and diagnostic test analysis.@*RESULTS@#(1) For left lower second premolar: 95.2% of those in dental age stage B-D were in MPS 1-2, accounting for the largest proportion. 85.3% of those in dental age stage E were in MPS 1-2, still accounting for the largest proportion. Another 14.7% were in MPS 3.45.1% of those in dental age stage F were in MPS 3, 46.1% in MPS 1-2, and another 8.8% in MPS 4s1.49.8% of those in dental age stage G were in MPS 3.24.9% in MPS 4s1, and 18.9% in MPS 1-2.80.1% of those in dental age stage H were in MPS 4-5. Another 16.3% were in MPS 3. (2) For left lower second molar: 89.7% of those in dental age stage B-D were in MPS 1-2, accounting for the largest proportion. 67.4% of those in dental age stage E were in MPS 1-2, still accounting for the largest proportion. Another 26.1% were in MPS 3.55.3% of those in dental age stage F were in MPS 3, 34.2% in MPS 1-2, and another 10.5% in MPS 4s1.50.7% of those in dental age stage G were in MPS 3, 24.3% in MPS 4s1, and 16.8% in MPS 1-2.83.8% of those in dental age stage H were in MPS 4-5, another 14.2% were in MPS 3. (3) To diagnose MPS stage with dental age, diagnostic pairs with good performance included: Dental age of left lower second molar-MPS: H-4s2, H-5, D-1; Dental age of left lower second premolar-MPS: H-4s2, H-5, G-3. Other diagnostic pairs were of ordinary diagnostic efficiency. (4) For dental age-MPS Spearman correlation analysis, dental age of left lower second molar-MPS had the highest Spearman coefficient (0.68), dental age of left lower second premolar-MPS was the second high (0.64). (5) Dental age stage H of left lower second molar or left lower second premolar indicated that the individual was later than MPS 4s2.@*CONCLUSION@#Dental age's diagnostic efficiency for MPS stage is ordinary on the whole, except for some pairs with good performance. Therefore, pre-treatment CBCT examination should be considered as assistance for evaluating maturation and fusion status of midpalatal suture.
Subject(s)
Adolescent , Adult , Child , Female , Humans , Male , Young Adult , China , Cone-Beam Computed Tomography , Cranial Sutures/diagnostic imaging , Retrospective Studies , SuturesABSTRACT
El uso de un método rápido y efectivo para la estimación de la maduración esquelética de los pacientes pediátricos es fundamental para la aplicación oportuna de tratamientos ortopédicos/ortodónticos. En Odontología Pediátrica, la toma de una radiografía panorámica, como método diagnóstico de rutina, puede servir para estimar con precisión el estadio de maduración en estos pacientes, mediante el cálculo de la edad dental. El objetivo del presente trabajo fue determinar la correlación entre las edades cronológica y dental con los estadios de maduración esquelética de las vértebras cervicales, a través del método estadístico no paramétrico con Rho de Spearman. Se utilizó un diseño observacional, transversal y analítico. La muestra consistió en 516 expedientes de pacientes entre los 5 y 15 años de edad, sistémicamente sanos, con radiografías panorámica y lateral de cráneo, tomadas en la misma fecha. Se determinó la edad cronológica de cada paciente según su historia clínica. Se realizó el cálculo de la edad dental de cada paciente con el método de Demirjian, y se determinó el estadio de maduración de vértebras cervicales con el método de Lamparski. Se determinó una correlación de 72 % entre la edad cronológica y la maduración ósea vertebral; una correlación del 66 % entre la edad dental y la maduración ósea, y una correlación del 86 % entre la edad cronológica y la dental. De acuerdo con estos resultados, tanto la edad cronológica y dental presentan una alta correlación con la edad de maduración vertebral. Se concluye así que la edad dental y cronológica son indicadores apropiados para estimar el estadio de maduración esquelética de los pacientes pediátricos.
The use of fast and effective methods for estimating the skeletal maturity for pediatric patients, is fundamental for the opportune application of orthopedic/orthodontic treatments. In pediatric dentistry, the panoramic radiography as a routine diagnostic method, can be used to estimate the stage of maturation in these patients, through the calculation of dental age. The aim of the present study is to determine the correlation between the chronological and dental ages, with the cervical vertebrae stages of skeletal maturity, through the non-parametric Spearman statistical method. An observational, transversal, and analytical design was employed. The sample consisted of 516 records from patients between 5 and 15 years of age, systemically healthy, with panoramic and lateral skull radiographs taken on the same date. The chronological age of each patient was determined according to the clinical history. Dental age of each patient was calculated with the Demirjian approach, and the stage of maturation of cervical vertebrae was determined by means of the Lamparski method. The results showed a correlation of 72 % between chronological age and bone maturation, a correlation of 66 % between dental age and bone maturation, and a correlation of 86 % between chronological and dental age. It is concluded that both chronological and dental age exhibit a high correlation with the correspondent stage of vertebral maturity. Thus, dental and chronological age are appropriate indicators to estimate, with high precision the stage of skeletal maturation in pediatric patients.
Subject(s)
Humans , Male , Female , Child , Adolescent , Tooth/growth & development , Age Determination by Skeleton/methods , Age Determination by Teeth/methods , Cervical Vertebrae/growth & development , Tooth/diagnostic imaging , Cervical Vertebrae/diagnostic imaging , Cross-Sectional Studies , Statistics, NonparametricABSTRACT
The aim of this study was to investigate development of third molars in 18 year old North Indian male population by means of CT scans and 3D software imaging. Methods: A retrospective analysis of CT scans of 50 patients aged 18 years at the time of their scan was conducted, and the developmental stages of the left third molars were evaluated using Demirjian's classification. Demirjian's classification system distinguished eight stages of crown and root development (Stages A-H). Results: The percentile distributions were recorded for each stage of development and variations for different stages were noted. The developmental and physiological changes of the tooth can be correlated to chronological age. Conclusion: The present investigation could provide reference data for third molar development in the North Indian population and maybe used in wider studies of tooth development and age prediction using dental radiographs for forensic and medico- legal purposes.
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RESUMEN: En la práctica forense un dato de gran importancia es la edad cronológica de los pacientes, este puede obtenerse de múltiples formas, algunas son complejas, costosas y tardadas, el cálculo de la edad dental (ED) por vía radiográfica es sencillo y de bajo costo, ha mostrado ser concordante con la edad cronológica (EC), presentando variaciones por sexo y raza. El objetivo de este estudio es establecer la concordancia de la ED y la EC en población mexicana. Este es un estudio transversal, observacional en el que un residente estandarizado evaluó 88 Ortopantomografías (44 femeninos y 44 masculinos) de manera cegada respecto a la EC, del archivo de la clínica de Ortodoncia de la Facultad de Odontología de la Universidad Autónoma de Sinaloa, con edades desde los 3 a los 16 años. Existe una diferencia en meses de 3,36 entre los valores ED y EC en el total de la población (p=0,384) con una concordancia de 94 % entre los valores. Al analizarlos por sexo los masculinos muestran una diferencia de 5,16 (P=0,785) con una concordancia de 96 % y los femeninos de 7,32 (P=0,095) con una concordancia de 92 %. La ED según Demirjian es un método confiable para estimar la EC en esta población.
ABSTRACT: In forensic practice knowledge of chronological age (CA) is an important factor, and it can be estimated by several methods. Some are complex, expensive and time consuming. Dental Age (DA) estimation by radiographic methods is easy and inexpensive, it has shown to be consistent with chronological age (CA), with variations according to sex and race. The objective of this study was to estimate the concordance between DA and CA in Mexicans. This is a cross sectional, observational study, in which a standardized dental resident reviewed 88 Orthopantomographies (44 female, 44 male), blinded to CA, of the Orthodontics School Files of the Universidad Autónoma de Sinaloa, the population was 3 to 16 years of age. The main difference in months between DA and CA was 3.36 (p=0.384) and 94 % of concordance, the analysis by sex for males showed a main difference of 5.16 (P=0.785) and 96 % concordance; for females it showed 7.32 (P=0.095) and concordance of 92 %. In conclusion the DA according to Demirjian is a reliable method to estimate CA in these patients.
Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Tooth/growth & development , Age Determination by Teeth/methods , Dentition , Tooth/diagnostic imaging , Radiography, Panoramic , Cross-Sectional Studies , Reproducibility of Results , Models, Statistical , Age Factors , MexicoABSTRACT
Aim and Objective: To assess the developmental stages of seven mandibular left teeth for estimation of dental age (DA )in children aged 8-16 years of south Kerala origin and to evaluate the possible correlation between DA and chronological age (CA) using Willems method. Materials and methods: Digital OPGs of 60 subjects (30 males and 30 females) who fit the study criteria were obtained .Assessment of mandibular teeth (31-37) development was undertaken and DA was assessed using Willems method. Results and Conclusion: There was significant correlation between DA and CA in both males (r=0.847) and females (r=0.801).The overall mean differences between DA and CA was 0.5 ± 1.2 with a gender variability as 0.330 ± 1.045 for males and 0.603 ± 1.417 for females.
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La edad es un indicador de maduración somática dental, de importancia clínica en Odontología para la planificación del tratamiento de pacientes en crecimiento. El método de Demirjian es el más ampliamente difundido para estimar la edad dental. Con este método se han realizado numerosos estudios en diferentes grupos étnicos, analizándose niños europeos, asiáticos y americanos, entre otros. Estos resultados sugieren posibles diferencias en los patrones de maduración dental entre las diferentes poblaciones. El objetivo del presente estudio fue correlacionar la edad dental, utilizando el método de Demirjian, con la edad cronológica de acuerdo al género en un grupo de niños que acudieron al Centro Radiológico "Innova" ubicado en Cuenca - Ecuador en el período 2012 2014, siendo este estudio de tipo descriptivo, retrospectivo y analítico, en donde se seleccionó una muestra estratificada por edad y genero incluyendo 362 radiografías, de las cuales 205 son de género femenino y 157 de género masculino. Se obtuvo un coeficiente de correlación inter- clase, como medida de correlación entre edad dental y cronológica, de 0,830 en el género femenino y 0,801 en el género masculino. En general el método de Demirjian tendió a subestimar la edad dental en niñas y en niños de manera similar. En conclusión, los resultados obtenidos en el presente trabajo no coinciden con numerosos lugares del mundo, es decir la edad dental en este grupo fue levemente menor tanto en las niñas como en los niños que la muestra original franco canadiense. El rango obtenido, de la edad dental no es similar a la edad cronológica pero el grado de correlación entre ambas es el adecuado para aplicar en nuestra población, presentándose de igual manera de acuerdo al género por lo que se elaboró una tabla estándar para la población Cuencana. Consideramos que el método de Demirjian es aplicable a esta muestra de niños utilizando la base de datos planteada en la presente investigación
Age is an indicator of dental somatic maturation, of clinical importance in dentistry for planning the treatment of growing patients. The Demirjian method is the most widely disseminated to estimate dental age. With this method, numerous studies have been carried out in different ethnic groups, analyzing European, Asian and American children, among others. These results suggest possible differences in dental maturation patterns between different populations. The aim of the present study was to correlate the dental age, using the Demirjian method, with the chronological age according to gender in a group of children who attended the Radiological Center "Innova" located in Cuenca-Ecuador in the period 2012 - 2014, This study was descriptive, retrospective and analytical, in which a sample stratified by age and gender was selected, including 362 radiographs, of which 205 are female and 157 male. An inter-class correlation coefficient was obtained, as a measure of correlation between dental and chronological age, of 0.830 in the female gender and 0.801 in the male gender. In general, Demirjian's method tended to underestimate dental age in girls and boys in a similar way. In conclusion, the results obtained in the present work do not coincide with many places in the world, that is, the dental age in this group was slightly lower in both girls and boys than the original Franco - Canadian sample. The obtained range of dental age is not similar to the chronological age but the degree of correlation between both is adequate to apply in our population, presenting itself in the same way according to gender, so a standard table for the population was elaborated Cuencana. We consider that the Demirjian method is applicable to this sample of children using the database proposed in the present investigation.
Subject(s)
Humans , Child , Adolescent , Tooth/growth & development , Age Determination by Teeth/methods , Radiography, Panoramic , Epidemiology, Descriptive , Retrospective Studies , Ecuador/epidemiology , Age and Sex DistributionABSTRACT
RESUMEN: Objetivo: El propósito de este estudio fue comparar tres métodos de estimación de la edad dental (ED) con fines forenses. Material y métodos: Se seleccionaron 512 radiografías panorámicas de sujetos de Maracaibo, estado Zulia, Venezuela, de ambos sexos (272 hembras y 240 varones), con edades cronológicas (EC) entre 6-18 años. Se asignaron los estadios de maduración propuestos por Nolla, Moorrees et al y Demirjian et al a siete dientes mandibulares permanentes del lado izquierdo, la ED fue calculada de acuerdo con la metodología de cada autor. Se obtuvo la EC en la cual se observaron los diferentes estadios de maduración, así como las diferencias de media entre la EC y la ED estimada por cada método mediante un test de Student para muestras relacionadas. Resultados: En general, las hembras alcanzaron los estadios de maduración a edades más tempranas que los varones. Se evidenció en el total de la muestra, una sobreestimación de la edad para el método de Demirjian et al (-0.14 ± 1.45), mientras que para el de Nolla y Moorrees et al se observó una subestimación, esta subestimación fue mayor para el método de Moorrees et al (2.63 ± 2.09) que para el de Nolla (0.42 ± 1.38), siendo que las diferencias encontradas entre la EC y la ED fueron estadísticamente significativas. Conclusión: Se determinó que para el total de la muestra, el método de Demirjian et al fue el más preciso.
ABSTRACT: Objective: The purpose of the present study was to compare three methods for calculation of dental age (DA) to be used for forensic purposes. Material and methods: 512 panoramic X-rays of subjects of both genders living in Maracaibo, State of Zulia, Venezuela were selected (272 females, 240 males). Selected subjects were in the 6-18 years chronological age (CA) range. Maturation stages of Nolla, Moorrees et al and Demirjian et al were assigned to seven permanent teeth of the left side, and DA was calculated according to methodology of each author. CA was obtained where different stages of maturation were observed, as well as mean difference between DA and CA as calculated with each method were obtained with a t student test for related samples. Results: In general, females reached maturation stages at earlier ages than males. The total sample revealed age over-estimation for the Demirjian method (-0.14 ± 1.45), whereas, a sub-calculation was observed for the Nolla and Moorrees et al method. This under-estimation was greater for the Moorrees at al method (2.63 ± 2.09) when compared to Nolla method (0.42 ± 1.38) and differences between DA and CA were found to be statistically significant. Conclusion: In the total studied sample, it was determined that Demirjian et al method was the most accurate.
ABSTRACT
Estimation of age-at-death is an integral part of the identification process of individuals in many forensic odontology cases where their identity cannot be determined by visualization or other ways. Dental age estimation in the adult is more challenging as most of the dentition is completely developed by 18 years of age. This study employs a mesio-distal (MD) pulp-to-tooth ratio taken at the neck of lower third molars (LM3) to provide an estimation of age at the time of radiographic imaging based on the well-known fact that pulp volume tends to decrease with advancing age due to continued apposition of secondary dentine throughout adulthood. A total of 155 Cone-beam computed tomography (CBCT) radiographs of LM3s for a random sample of 155 Jordanian Arabs (80 females, 75 males; age range= 18-58 years, mean age= 28.2 years, SD =10.0 years) were used. Both pulp and tooth MD diameters were measured at the neck. MD pulp-to-tooth ratios for LM3s were linearly regressed against age. Statistically significant negative association was found between an individual's age at the time of imaging and the MD pulp-to-tooth ratio taken at the neck. Specifically, the strength of the association is r= -0.361, which means only 13.0 % of the variation in age can be explained by the MD pulp-to-tooth ratio taken at the neck. Therefore, it was concluded that MD pulp-to-tooth ratio taken at the neck of LM3s is not a reliable predictor of chronological age in adults, possibly due to the large variation in the timing of LM3 development.
La estimación de la edad es una parte integral del proceso de identificación de los individuos, en muchos casos en odontología forense donde la identidad no puede ser determinada por visualización u otras formas. La estimación de la edad dental en el adulto es aún más difícil ya que la mayor parte de la dentición se desarrolla completamente a los 18 años de edad. Este estudio emplea una relación mesio-distal (MD) de pulpa a diente tomada a nivel del cuello de los terceros molares inferiores (LM3) para proporcionar una estimación de la edad en el momento de la imagen radiográfica basada en que el volumen de pulpa tiende a disminuir con el avance de la edad debido a la continua posición de la dentina secundaria a lo largo de la edad adulta. Se examinaron un total de 155 radiografías de LM3 en una muestra aleatoria de 155 árabes jordanos (80 mujeres, 75 varones), rango de edad = 18-58 años, edad media = 28,2 años, DE = 10,0 años. Específicamente, la fuerza de la asociación es r=0,361, lo que significa que sólo el 13,0 % de la variación en la edad puede explicarse por la proporción pulpa-a-diente.
Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Age Determination by Teeth , Dental Pulp Cavity/diagnostic imaging , Molar, Third/diagnostic imaging , Cone-Beam Computed Tomography , Dental Pulp Cavity/anatomy & histology , Forensic Dentistry , Jordan , Molar, Third/anatomy & histologyABSTRACT
Introducción: La erupción cronológica de los dientes deciduos y permanentes implica una serie de procesos sucedáneos que van desde la morfogénesis de cada diente hasta el establecimiento fisiológico de la oclusión dental. Sin embargo, se ha identificado que diferentes factores genéticos y medioambientales locales y regionales pueden alterar el proceso secuencial de erupción de los dientes respecto a la edad cronológica de los seres humanos. Objetivo: Caracterizar la cronología de la erupción dentaria en un grupo de mestizos caucasoides de Cali (Colombia). Materiales y Métodos: Estudio descriptivo observacional de corte transversal que determinó el dimorfismo sexual, la simetría de arco y la simetría bilateral a partir de la observación y análisis de la cronología de la erupción dentaria en 355 radiografías panorámicas pertenecientes a un grupo de mestizos caucasoides (181 de individuos femeninos y 174 de masculinos) de la ciudad de Cali (Colombia) a través del método de Schour y Massler. Resultados: Al correlacionar la edad cronológica con la edad radiográfica, no se evidenciaron diferencias entre sexo, arco y lado en la cronología de erupción de los dientes deciduos y permanentes. Conclusiones: El método de Schour y Massler permitió evidenciar una alta correlación entre la edad dental y la edad cronológica, lo cual es de gran utilidad en el contexto clínico odontológico para hacer seguimiento de la salud buco-dento-maxilo- facial en armonía con el crecimiento y desarrollo postnatal, y en el contexto antropológico y forense para para la estimación de la edad como parte de la cuarteta básica de identificación y para la documentación de los dictámenes médicolegales de edad.
Background: The chronological eruption of the deciduous and permanent teeth involves a sequential process that go from the morphogenesis of each tooth to the physiological establishment of the dental occlusion. However, it has been identified that different local and regional genetic and environmental factors can alter the sequential process of eruption of the teeth with respect to the chronological age of human beings. Objective: Characterize the chronology of tooth eruption in a group of Caucasoid mestizos from Cali (Colombia). Materials and Methods: Cross-sectional study that determined sexual dimorphism, arch symmetry and bilateral symmetry from the observation and analysis of the chronology of tooth eruption in 355 panoramic radiographs belonging to a group of Caucasoid mestizos (181 female and 174 men individuals) from the city of Cali (Colombia) through the method of Schour and Massler. Results: When correlating chronological age with radiographic age, no differences between sex, arch and side in the chronology of eruption of the deciduous and permanent teeth were found. Conclusions: The Schour and Massler method showed a high correlation between dental age and chronological age, which is very useful in the dental clinical context to monitor the oral-maxillofacial health in harmony with postnatal growth and development, and in the anthropological and forensic context for the estimation of age as part of the basic identification proceedings and for the documentation of medical-legal age opinion.
Subject(s)
Humans , Child Development , Cross-Sectional Studies , Dentistry , Tooth Eruption , Tooth, Deciduous , Natal TeethABSTRACT
@#This study aims to determine which age assessment data using the third molar development values (local or international) is suitable for estimating the age of Malays or Chinese in Malaysia. A sample of 60 panoramic images of Malays and Chinese aged between 13.58 to 21.25 years were selected. Different assessment surveys which included the studies by Yusof et al. (2015), Wilson (2005), Johan et al. (2012), Mincer et al. (1993), AlQahtani et al. (2010) and Gunst et al. (2003) were employed to estimate the age from the developing third molar on the panoramic images studied. The estimated ages were compared to the chronological age of the selected Malaysians. All the datas were then recorded on Microsoft Excel sheet. The two observers were then subjected to the Intraclass Correlation Coeffecient (ICC) inter-observer reliability test.The highest number of correspondence (65%) between the chronological and estimated age (within one year) was for the survey conducted by Wilson. With regards to ethnicities, 70% of Chinese matched the mean estimated age by Wilson while Malays showed a high correspondence for the study by Mincer et al. (63.3%). Furthermore the ICC reliability test showed strong agreement between the two observers. There were similarities between the Malay and Chinese population in the correspondence of the estimated age to the chronological age employing the different dental estimation surveys; in addition the study by Wilson and Mincer et al. yielded best matching for these Malaysians.
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Objective To explore the relationship between cervical bone age and male juvenile mandibular second molar (Msm) root growth ,and to provide evidence for the development of bone and teeth in patients with orthodontic treatment . Methods The CBCT and lateral cephalometric radiographs of 114 cases of 9 .5 to 15 .5 years old children in Chongqing city and ad‐olescents cervical vertebral bone and MSM root length were measured ,using statistical analysis to explore the relationship between cervical vertebral bone ,tooth root length change of age and Msm .Results By Pearson correlation analysis ,Msm root length chan‐ges and cervical vertebral bone were positively correlated(r= 0 .737 ,P< 0 .01) .Msm root length changes showed a positive correla‐tion with age(r= 0 .681 ,P< 0 .01) .Msm root length changes was positively related with dental age(r = 0 .795 ,P< 0 .01) .Conclu‐sion The root growth of the mandibular second molar was highly correlated with cervical vertebral bone in male children .When the growth and development of patients were judged by orthodontic treatment ,we can adopt the mandibular second molar root length forecast growth level of male adolescents .
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[Abstract ]Objective:To estimate dental maturation norms of permanent dentition in a group of Nanjing children using Nolla's tech-nique.Methods:549 cases of panoramic radiographs (279 males and 270 females)of Nanjing children at the age range of 3 to 16 years were collected for the study.All permanent mandibular teeth on the left side (except for the third molars)were scored according to Nolla's method,and data were presented in tables and used to plot dental maturation curves for the Nanjing boys and girls.Results:Females were found to be more advanced in the degrees of dental development.Dental maturation is significantly associated with chron-ological age (for males and females:r =0.959,P <0.001 and r =0.953,P <0.001,respectively).The mathematical model of them was established,and then the fitting equation was obtained.Conclusion:The dental maturation curve and chronology of permanent dentition can provide the growth norms of permanent teeth for Nanjing children and facilitate the way for dentists to assess the growing children during diagnosis and treatment planning.