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1.
Braz Oral Res ; 34: e051, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32578761

RESUMEN

The aim of this study was to verify the precision and applicability of two methods of age estimation, Kvaal's and Cameriere's methods, among Brazilian adults. A sample composed of periapical radiographs of canine teeth belonging to 320 Brazilian adults was analyzed, divided into groups according to sex (male and female) and age group (20-29 years, 30-39 years, 40-49 years and 50-59 years). Kvaal's method presented better results when compared to the results of Cameriere's method in the general evaluation of each canine tooth, except for the upper left canine (tooth 23), which presented a mean error (ME) with no statistically significant difference between the methods (Kvaal: ME = 7.43, p = 0.4991, Cameriere: ME = 7.55, p = 0.6982). In the evaluation by age groups, Kvaal's method presented a lower variation between the real age and estimated age when applied to the age groups of 20-29 years and 30-39 years compared to the results provided by Cameriere's method. With respect to the groups aged 40 to 49 years and 50 to 59 years, Cameriere's method presented better performance than the results provided by Kvaal's method. The methods of estimating age proposed by Kvaal and Cameriere are simple and nondestructive and have demonstrated reproducibility and reliability. The Kvaal method was more accurate for the age groups of 20-29 and 30-39 years, and for those over 40 years, the Cameriere method was the most accurate.


Asunto(s)
Determinación de la Edad por los Dientes/métodos , Adulto , Factores de Edad , Brasil , Diente Canino/anatomía & histología , Diente Canino/diagnóstico por imagen , Femenino , Odontología Forense/métodos , Humanos , Masculino , Persona de Mediana Edad , Radiografía Dental Digital/métodos , Estándares de Referencia , Reproducibilidad de los Resultados
2.
J Med Life ; 13(1): 56-63, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32341702

RESUMEN

Our aim was to evaluate the location of impacted canines and their proximity to the lateral and central incisor to assess the prognosis of the impacted canine and compare the reliability of 2D versus 3D imaging solutions. We carried a prospective study on 17 subjects with impacted maxillary canines. Later, the patients underwent radiologic examination, i.e., sectional computed tomography and orthopantomography. The obtained records were compared regarding the location of the impacted maxillary canine, the proximity and resorption of the impacted canine to the lateral and central incisors, the prognosis of the impacted canine, and the linear distance of the canine from the vertical and horizontal reference lines drawn. Eleven males (45.8%) and 13 females (54.1%), 11 (45.8%) impacted canines on the right side, and 13 (54.1%) on the left side, as well as 2 (8.3%) transpositions, were noted. Buccally impacted teeth caused less resorption of the adjacent teeth. Among the 24 teeth examined using orthopantomography with the sector method, 3 (12.5%) teeth were found in sector 1. There were 8 (33.33%) teeth in sector 2, and 11 (45.8%) of the impacted canines were in sector 3. In localizing impacted maxillary canines, computed tomography revealed an increased accuracy of 31% compared to orthopantomography. Even though both computed tomography and orthopantomography revealed similar records, computed tomography showed more accuracy, also having an added advantage of its 3D viewing capabilities in precise localization of the impacted maxillary canine.


Asunto(s)
Incisivo/diagnóstico por imagen , Radiografía Panorámica , Tomografía Computarizada por Rayos X , Diente Impactado/diagnóstico por imagen , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Imagenología Tridimensional , Masculino , Estudios Prospectivos , Reproducibilidad de los Resultados
3.
Cient. dent. (Ed. impr.) ; 17(1): 7-14, ene.-abr. 2020. tab, graf, ilus
Artículo en Español | IBECS | ID: ibc-189744

RESUMEN

INTRODUCCIÓN: La inclusión de caninos tiene una alta incidencia y plantea varias complicaciones clínicas, siendo de vital importancia el diagnóstico precoz y exacto para minimizar los riesgos y complicaciones derivadas. El objetivo de este trabajo es analizar, utilizando como referencia las líneas planteadas por Alqerban, la efectividad de las dos dimensiones en el diagnóstico volumétrico de la inclusión de los caninos maxilares. MÉTODOS: Seleccionamos 27 pacientes con 36 caninos maxilares incluidos que se realizaron estudio de ortodoncia con ortopantomografía y tomografía computarizada de haz cónico (Cone Beam Computed Tomography, CBCT) del maxilar en la Clínica Universitaria de la Universidad Europea. Se trazaron tres líneas de referencia basándose en la distancia de la cúspide del canino al plano oclusal (L1), a la línea media (L2) y a su lugar ideal de erupción (L3), tanto en la ortopantomografía como en el CBCT. Como valores de referencia ideales seleccionamos un grupo control de 36 caninos maxilares erupcionados. RESULTADOS: Se compararon los resulta-dos en dos y tres dimensiones mediante la prueba T de Student, tras comprobar su distribución normal mediante la prueba de contraste de Anderson-Darling. No se obtuvo significación estadística (p > 0.05) para ninguna de las variables estudiadas. CONCLUSIONES: El uso del CBCT es vi-tal para asegurar un buen diagnóstico en cuanto a la posición del canino y su relación con estructuras adyacentes y así establecer un plan de tratamiento adecuado. Aun así, la ortopantomografía aporta información suficiente para la planificación inicial


INTRODUCTION: Impacted canines have a high incidence and pose several clinical complications, with early and exact diagnosis being of vital importance to minimise the risks and derived complications. The objective of this study is to analyse the effectiveness of the two dimensions in the volumetric diagnosis of impacted maxillary canines, using the lines proposed by Alqerban as a reference. METHODS: We selected 27 patients with 36 maxillary canines who underwent an orthodontic study with orthopantomography and cone beam computed tomography (CBCT) of the maxilla at the Madrid European University Dental Clinic. Three reference lines were drawn based on the distance from the cusp of the canine to the occlusal plane (L1), to the midline (L2) and to its ideal eruption site (L3), both in the orthopantomography and in the CBCT. As ideal reference values, we selected a control group of 36 erupted maxillary canines. RESULTS: The results were compared in 2 and 3 dimensions using the Student's t-test, after verifying their normal distribution using the Anderson-Darling test. Statistical significance (p > 0.05) was not obtained for any of the variables studied. CONCLUSIONS: The use of CBCT is vital to ensure a good diagnosis for the position of the canine and its relationship with adjacent structures, thus establishing an adequate treatment plan. However, orthopantomography provides enough information for initial planning


Asunto(s)
Niño , Adolescente , Adulto Joven , Adulto , Persona de Mediana Edad , Diente Canino/diagnóstico por imagen , Diagnóstico Precoz , Maxilar/diagnóstico por imagen , Ortodoncia/métodos , Tomografía Computarizada de Haz Cónico , Diente Impactado/diagnóstico por imagen , Intervalos de Confianza , Radiografía Panorámica/métodos
4.
Int J Legal Med ; 133(6): 1967-1976, 2019 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-31471652

RESUMEN

Secondary dentine deposition is responsible for the decrease in the volume of the pulp cavity with age. Therefore, the volume of the pulp cavity can be considered as a predictor for estimating age. The aims of this study were to investigate the relationship strength between canine pulp volumes and chronological age from homogenous (approximately equal numbers of individuals in each age range) age distribution and to assess the effect of sex as predictor in age estimation. This study was performed on 719 subjects of Pakistani origin. Cone beam computed tomography images of 521 left maxillary and 681 left mandibular canines were collected from 368 females and 349 males aged from 15 to 65 years. Planmeca Romexis® software was used to trace the outline of the pulp cavity and to calculate pulp volumes. Regression analysis was performed to assess the correlation between pulp volumes considering with and without sex as a predictor with chronological age. The obtained results showed that mandibular canine pulp volume and sex have the highest predictive power (R2 = 0.33). The relationship between mandibular canine pulp volume and sex with chronological age demonstrates an odd S-shaped non-linear relationship. A statistically significant difference in volumes of pulp was found (p = 0.000) between males and females. The conclusion was that predictions using the pulp volume of the mandibular canine and sex produced the best estimates of chronological age.


Asunto(s)
Determinación de la Edad por los Dientes/métodos , Tomografía Computarizada de Haz Cónico , Diente Canino/diagnóstico por imagen , Pulpa Dental/diagnóstico por imagen , Pulpa Dental/crecimiento & desarrollo , Adolescente , Adulto , Anciano , Femenino , Odontología Forense , Humanos , Procesamiento de Imagen Asistido por Computador , Masculino , Persona de Mediana Edad , Pakistán , Adulto Joven
5.
Am J Orthod Dentofacial Orthop ; 156(3): 391-400, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31474269

RESUMEN

INTRODUCTION: Orthodontic traction of a maxillary impacted canine (MIC) increases the orthodontic treatment time. Therefore, the objective of this study was to evaluate the influence of MIC characteristics and factors associated with orthodontic treatment on the duration of active orthodontic traction. METHODS: This follow-up and retrospective study included 45 MICs orthodontically tractioned into the occlusal plane with the use of a standardized protocol. MIC characteristics, including type, sector, side, location, height, and complexity of impaction, as well as α and ß angles and canine root length and area were measured. Likewise, factors associated with orthodontic treatment, including sex, age, malocclusion, premolar extractions, previous incisor root resorption, ANB, APDI, and SNA angles, and PNS-ANS distance were also evaluated. The statistical analysis included multiple linear regressions to estimate the influence of all variables on the duration of traction (α = 0.05). RESULTS: Sex had significant influence (P = 0.027) on the time of traction; in female patients, the time was 2.05 months more than in male patients. Bilateral impaction treatment increased the time by 2.74 months compared with unilateral cases (P = 0.001). Traction of bicortically centered impacted canines increased the duration of traction by 2.85 months (P = 0.001). Finally, the traction time increased in 2.35 months (P = 0.046) when the impaction sectors were 4 or 5 (close to the midline). CONCLUSIONS: The duration of active orthodontic traction of MIC is mainly influenced by sex, bilateral type, bicortically centered location, or when MIC is located in sector 4 or 5 close to midline, increasing the traction time by some months.


Asunto(s)
Diente Canino/cirugía , Maxilar/cirugía , Ortodoncia Correctiva/métodos , Diente Impactado/complicaciones , Diente Impactado/terapia , Adolescente , Diente Canino/diagnóstico por imagen , Femenino , Estudios de Seguimiento , Humanos , Incisivo , Masculino , Maloclusión/clasificación , Maloclusión/terapia , Maxilar/diagnóstico por imagen , Procedimientos Quirúrgicos Orales , Métodos de Anclaje en Ortodoncia/instrumentación , Métodos de Anclaje en Ortodoncia/métodos , Aparatos Ortodóncicos Fijos , Ortodoncia Correctiva/instrumentación , Evaluación de Procesos y Resultados en Atención de Salud , Planificación de Atención al Paciente , Radiografía Dental , Estudios Retrospectivos , Resorción Radicular/complicaciones , Factores Sexuales , Factores de Tiempo , Erupción Dental , Raíz del Diente/anatomía & histología , Raíz del Diente/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen , Diente Impactado/cirugía , Tracción , Resultado del Tratamiento
6.
Forensic Sci Int ; 303: 109920, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31442711

RESUMEN

Sex estimation has a vital role in the solution of forensic cases when the identification of a large number of victims is needed. Considering the sexual dimorphism of the human teeth, the objective of this study was to estimate human sex by means of cone beam computed tomography (CBCT)-based volumetric assessment of the dental crown. A total of 78 CBCT images of the upper central incisors, upper and lower canines, and lower lateral incisors were equally selected from a Brazilian population aged between 8 and 36 years old. The dental crowns were subjected to image-based volumetric assessment by manual segmentation using the 3D slicer software, and the outcomes were compared by the Mann-Whitney test, unpaired t-test, Pearson correlation test, conditional backward stepwise logistic regression and intraclass correlation coefficient (α=0.05). The volumetric accuracy of the upper central incisor, upper canine and lower canine for sex estimation were 64.1%, 74.4% and 79.5%, respectively. The combined analysis of the upper and lower canines allowed an average accuracy of 83.7%. In conclusion, the combined volumetric analysis of the crown of the upper and lower canines can be applied for sex estimation in the studied population.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Caracteres Sexuales , Corona del Diente/diagnóstico por imagen , Adolescente , Adulto , Niño , Diente Canino/diagnóstico por imagen , Femenino , Odontología Forense/métodos , Humanos , Imagenología Tridimensional , Incisivo/diagnóstico por imagen , Modelos Logísticos , Masculino , Adulto Joven
7.
J Appl Oral Sci ; 27: e20180722, 2019 Aug 12.
Artículo en Inglés | MEDLINE | ID: mdl-31411266

RESUMEN

OBJECTIVES: Age estimation is one of the most important factors in forensic medicine. Measuring secondary dentin deposition using cone-beam computed tomography images is an easy and noninvasive method. The aim of this study was to evaluate cone-beam computed tomography images as a reliable method to estimate chronological age by pulp/teeth ratio in anterior teeth in Iranian population. METHODOLOGY: A total of 649 CBCT images from 377 Iranian patients aged between 20 and 69 years were evaluated. Pulp/teeth ratio (PTR) in maxillary and mandibular canine and central incisor teeth was measured in the axial and sagittal sections using OnDemand 3D Dental software. The Pearson correlation coefficient was determined to evaluate the correlation between the variables. Linear regression analysis, as well as age estimation formula, was used for each tooth separately. RESULTS: The regression analyses indicated that maxillary central incisors were more reliable for age estimation (R2=0.586 and standard error of estimate=7.045) compared with the other anterior teeth studied. Maxillary canine teeth had the lowest predictive power (R2=0.392 and standard error of estimate=8.387). Also, comparison of the axial and sagittal sections showed that the axial sections had a higher predictive power. (R2=0.48 for axial plans and R2=0.328 for sagittal plans). CONCLUSION: The use of cone-beam computed tomography in age estimation by pulp/teeth ratio of anterior teeth is useful and a reliable method for age estimation in Iranian population.


Asunto(s)
Determinación de la Edad por los Dientes/métodos , Tomografía Computarizada de Haz Cónico/métodos , Pulpa Dental/anatomía & histología , Pulpa Dental/diagnóstico por imagen , Diente/anatomía & histología , Diente/diagnóstico por imagen , Adulto , Factores de Edad , Anciano , Diente Canino/anatomía & histología , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Imagenología Tridimensional , Incisivo/anatomía & histología , Incisivo/diagnóstico por imagen , Modelos Lineales , Masculino , Persona de Mediana Edad , Tamaño de los Órganos , Valores de Referencia , Reproducibilidad de los Resultados , Factores Sexuales , Adulto Joven
8.
J Forensic Odontostomatol ; 37(1): 63-65, 2019 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-31187744

RESUMEN

Dental information is one of the three scientific methods of identifying a deceased person. However, when an investigator is faced with dental ante-mortem information that indicates the deceased has had all his teeth extracted, it may be assumed that the dental information will not be useful, especially if no retained roots are visible in the post-mortem triage. The following case report highlights that careful examination including radiography, may reveal specific detailed information which was useful for identification to be established. Two small radiopaque objects were located in the apical area where the upper left canine root apex would have been. The radiopacities size, location, positioning to both each other and to the left maxillary sinus corresponded to ante-mortem radiographs. This case reveals an unusual use of extruded root canal material being of evidential value even though the tooth was extracted.


Asunto(s)
Diente Canino/diagnóstico por imagen , Odontología Forense/métodos , Materiales de Obturación del Conducto Radicular , Obturación del Conducto Radicular , Ápice del Diente/diagnóstico por imagen , Adulto , Humanos , Masculino , Cambios Post Mortem , Radiografía Panorámica
9.
Technol Health Care ; 27(S1): 195-204, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31045539

RESUMEN

BACKGROUND: In orthodontics, the tooth movement is a biologic reaction to applied force systems, brackets, archwires, and periodontium tissue. OBJECTIVE: To investigate the effects of the various archwire characteristics like the friction coebetween bracket and archwire, the cross-section shape, and the cross-section dimension, on the displacement and the periodontal ligament (PDL) stresses of canine's movement in a self-ligating treatment using the finite element (FE) analysis method. METHODS: Models of teeth and their supporting tissues, brackets and archwires were constructed. Ten kinds of archwires were used for the simulation. RESULTS: Considering the translation movement, the maximum displacement, highest stress, and Rc⁢r increased with an increase in the cross-section area. The maximum displacement and highest stress increased with an increase in the friction coefficient. The Rc⁢r values increased with an increase in the friction coefficient in the round archwires, while decreased with an increase in the rectangular archwires. However, these change tends were different in rotation and inclination movement. CONCLUSION: The archwire characteristics (round archwire, rectangular archwire, cross-section area, and friction coefficient) exhibited different effects on the tooth translation, rotation, and inclination. Our results can assist in the improvement of the self-ligating orthodontic treatment.


Asunto(s)
Diente Canino , Análisis de Elementos Finitos , Estrés Mecánico , Técnicas de Movimiento Dental , Diente Canino/diagnóstico por imagen , Análisis del Estrés Dental , Humanos , Imagenología Tridimensional , Tomografía Computarizada por Rayos X
10.
Am J Orthod Dentofacial Orthop ; 155(3): 380-387, 2019 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30826041

RESUMEN

OBJECTIVES: The early interceptive treatment of palatally displaced canines (PDCs) has for decades been based on their position in panoramic radiographs. In the 1990s, cone-beam computed tomography (CBCT) started to become popular in cases with PDCs. The aims of this prospective study were to evaluate the agreement of PDC sector position and angle to midline between panoramic radiographs and CBCT scans. METHODS: PDC sector and angle to midline were measured in panoramic radiographs and CBCT scans in 58 consecutive patients with 64 PDCs. Kappa with linear weighting was used to assess the agreement between the measurements of PDC sector position and Bland-Altman limits of agreement to assess the agreement between the PDC angular measurements in the 2 methods. RESULTS: PDC sector position and angle to midline had systematically higher values in panoramic radiographs compared with those in the CBCT scans. The agreement of sector position between the methods was fair: weighted kappa 0.36 (95% CI 0.24-0.49). The mean difference in angle was almost 7° (95% CI 5.9°-7.9°) higher in panoramic radiographs compared with CBCT. CONCLUSIONS: Panoramic radiographs overestimate PDC sector and angle to midline position, compared with the use of CBCT scans, but clinically the differences are quite modest. Panoramic radiographs could be considered good enough for rendering PDC position when the need for 3D information is not crucial for treatment planning.


Asunto(s)
Diente Canino/anomalías , Diente Canino/diagnóstico por imagen , Radiografía Panorámica , Erupción Ectópica de Dientes/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen , Adolescente , Tomografía Computarizada de Haz Cónico , Femenino , Humanos , Masculino , Maxilar/diagnóstico por imagen , Ortodoncia Interceptiva , Suecia , Erupción Ectópica de Dientes/terapia , Diente Impactado/terapia
11.
J Orofac Orthop ; 80(1): 17-24, 2019 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-30306188

RESUMEN

AIM: The purpose of this study is to compare the effects of different wire size reverse closing loop and retraction forces in canine tooth distalization using the finite element analysis method. MATERIALS AND METHODS: Maxillary alveolar bone, maxillary first molar, second premolar and canine teeth were constructed in three dimensions along with their periodontal ligaments and standard edgewise brackets of 0.022 inch and stainless-steel reverse closing loop of 0.016â€¯× 0.022 inch and 0.019â€¯× 0.025 inch were designed. Force of 0.98 N and 1.96 N were applied to the arch wire from the posterior region of the molar tooth in the distal direction for activating the reverse closing loop. The stress distribution and displacement of the maxillary canine tooth were performed using the three-dimensional finite element analysis method. RESULTS: The maximum deformation on the canine tooth was higher in the x­, y­, and z­axes in both arch wires with 1.96 N force activation. Moreover, 1.96 N caused more stress on the canine tooth in both arch wires compared to the application of 0.98 N. In terms of von Mises stress distribution on alveolar bones, the amount of stress was higher during the application of 1.96 N than the application of 0.98 N. CONCLUSION: The finite element method is a reliable instrument which allows the effects of biomechanics applied in orthodontics to be evaluated. The finite element analysis method precisely predicted the mechanical effects of reverse closing loop of different wire sizes and different retraction forces.


Asunto(s)
Diente Canino , Alambres para Ortodoncia , Técnicas de Movimiento Dental/instrumentación , Proceso Alveolar/diagnóstico por imagen , Tomografía Computarizada de Haz Cónico , Diente Canino/diagnóstico por imagen , Análisis del Estrés Dental , Análisis de Elementos Finitos , Humanos , Imagenología Tridimensional , Radiografía Dental
12.
Clin Oral Investig ; 23(1): 81-86, 2019 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29564557

RESUMEN

OBJECTIVES: To analyze the incidence and distribution of branch canals in mandibular anterior teeth. MATERIALS AND METHODS: Three hundred mandibular anterior teeth, comprising 100 central incisors, 100 lateral incisors, and 100 canines, were scanned using a micro-computed tomography (micro-CT) system. Three-dimensional (3-D) visualization reconstruction of the root canal system and its branch canals was performed on each specimen. Data regarding the number of branch canals, the distance from the anatomical apex to the branch canal, and the orientation of each branch orifice were collected and analyzed. RESULTS: One hundred and fifty-three primary branch canals and 35 secondary branch canals were detected in the specimens overall. The incidence of branch canals in mandibular anterior teeth was 34%, with the highest incidence (50%) exhibited in mandibular canines, followed by lateral incisors (29%). Of the 153 primary branch canals found in the mandibular anterior tooth samples investigated, 82.35% appeared within 3 mm of the apical region, while 71.90% were labial and lingual canals. CONCLUSIONS: There was regularity in the distribution and orientation of branch canals in mandibular anterior teeth. CLINICAL RELEVANCE: This knowledge may be employed as a guide in clinical endodontic therapy.


Asunto(s)
Diente Canino/anatomía & histología , Diente Canino/diagnóstico por imagen , Incisivo/anatomía & histología , Incisivo/diagnóstico por imagen , Mandíbula/anatomía & histología , Mandíbula/diagnóstico por imagen , Odontometría/métodos , Raíz del Diente/anatomía & histología , Raíz del Diente/diagnóstico por imagen , Microtomografía por Rayos X/métodos , China , Humanos , Imagenología Tridimensional , Técnicas In Vitro
13.
Am J Phys Anthropol ; 168(1): 25-44, 2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-30431648

RESUMEN

OBJECTIVES: Adult age at death estimation continues to challenge physical anthropologists. One estimation method involves counting tooth cementum annulations (TCA). Non-destructively accessing TCA is a critical step to approaching fossil teeth of unknown age and to verifying life history profiles of human ancestors. This pilot study aims to (a) non-destructively image TCA in teeth from a known age archeological human population by propagation phase contrast X-ray synchrotron µCT (PPC-SR-µCT) (b) test the correlation between real and estimated ages, and the accuracy, precision and bias of age estimates. MATERIALS AND METHODS: We examine 20 permanent human canines (aged 20-81 years), from a 18th to 19th century known age collection from St. Luke's Church (London, England). We scanned transverse segments of acellular cementum in the apical portion of the middle root third using PPC-SR-µCT. We generated virtual transverse sections on which two observers perform two sessions of blind TCA counts. We calculate the estimated ages at death by adding 10 years to the TCA counts. RESULTS: A moderately strong positive linear relationship exists between real and estimated ages (r = 0.76, p < .001), with an average inaccuracy of 16.1 years and an average bias towards underestimation of 15.7 years. This difference is lower in individuals <50 years (6.8 and 6.5 years, respectively, n = 10) compared with those >50 years (24.9 years, n = 10). DISCUSSION: We reliably imaged and identified TCA in individuals <50 years from a known-age archeological sample. Scanning refinement will yield a promising alternative to current destructive methods of TCA analyses and to aid access to life history events in adult fossil hominins.


Asunto(s)
Determinación de la Edad por los Dientes/métodos , Cemento Dental/diagnóstico por imagen , Microtomografía por Rayos X/métodos , Adulto , Anciano , Anciano de 80 o más Años , Antropología Física , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Masculino , Persona de Mediana Edad , Proyectos Piloto , Sincrotrones , Microtomografía por Rayos X/instrumentación , Adulto Joven
14.
Eur J Paediatr Dent ; 19(4): 300-302, 2018 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-30567447

RESUMEN

BACKGROUND: The palatal impaction of maxillary canine is a quite common yet challenging clinical condition that orthodontists have to face in the everyday practice. The purpose of this report is to describe and discuss a case involving the uncovering of an upper canine and it subsequent spontaneous eruption. CASE REPORT: The diagnostic and therapeutic protocol of a case with a palatally impacted canine is presented. The upper right canine was uncovered with an open surgical approach. Removal of the attached gingiva and bone covering the crown enhanced the tooth spontaneous eruption, while the first levelling and aligning phase of the treatment was performed. This approach results in a shorter overall treatment time. This protocol produced an aesthetic, healthy and functional result, which was stable at the two-year post-treatment follow-up.


Asunto(s)
Diente Canino/cirugía , Ortodoncia Correctiva/métodos , Diente Impactado/cirugía , Adolescente , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Maxilar/diagnóstico por imagen , Maxilar/cirugía , Radiografía Panorámica , Colgajos Quirúrgicos , Erupción Dental , Diente Impactado/diagnóstico por imagen
15.
Eur J Orthod ; 40(6): 575-582, 2018 11 30.
Artículo en Inglés | MEDLINE | ID: mdl-30500916

RESUMEN

Objectives: To compare parameters related to impacted canines at the cleft versus the normal contralateral side and with non-impacted canines at the cleft side in unilateral cleft lip and palate (UCLP) patients. We also aim to search for possible associated parameters enabling prediction of canine impaction in these patients. Materials and methods: Ninety-five non-syndromic UCLP patients were included and divided into group A (n = 41 patients) with unilateral impacted canines at the cleft side (A1) and spontaneously erupted canines at the non-cleft side (A2) and group B with spontaneously erupted canines at the cleft side (n = 54 patients). Clinical information and radiographic parameters on panoramic radiographs were collected and compared between groups using a generalized linear mixed model, a Mann-Whitney U-test, a Fisher's exact test, and receiver operating characteristic tests. Results: Impaction of the maxillary canine at the cleft side in UCLP patients can be suspected in case of delayed canine root development, a higher vertical position and sector score (P < 0.05) and higher angles between the canine and the midline, as well as between canine and lateral incisor and between first premolar (P < 0.001). Results clearly indicate that the erupting canine position at the cleft side, even when not impacted, is different from the non-cleft side. Conclusion: There is a great risk for canine impaction at the cleft side in UCLP patients when the canine position is more apical than one-third of the root of the adjacent lateral incisor and when the angles between canine and midline and between canine and first premolar are higher than 23.82 and 16.1 degrees, respectively. These associated parameters should have to be studied in a prospective setting to confirm their predictive value.


Asunto(s)
Injerto de Hueso Alveolar/métodos , Labio Leporino/complicaciones , Fisura del Paladar/complicaciones , Diente Impactado/etiología , Diente Premolar/diagnóstico por imagen , Diente Premolar/patología , Labio Leporino/patología , Labio Leporino/cirugía , Fisura del Paladar/patología , Fisura del Paladar/cirugía , Diente Canino/diagnóstico por imagen , Diente Canino/crecimiento & desarrollo , Diente Canino/patología , Femenino , Humanos , Incisivo/diagnóstico por imagen , Incisivo/patología , Lactante , Masculino , Radiografía Panorámica , Estudios Retrospectivos , Erupción Dental , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología
16.
Oral Radiol ; 34(1): 66-72, 2018 01.
Artículo en Inglés | MEDLINE | ID: mdl-30484094

RESUMEN

OBJECTIVES: The aim of this study was to evaluate the localization, angulation, and resorption features of maxillary impacted canines on cone-beam computed tomography (CBCT). METHODS: This retrospective study examined the CBCT scans of 140 maxillary impacted canines in 102 patients (43 males, 59 females; mean age: 16.25 ± 6.31 years). The following impacted canine-related parameters were analyzed on the CBCT images: impaction side; location; root resorption levels of adjacent teeth; occlusal plane and midline distances of impacted canines; and angulations of impacted canines to midline, lateral incisor, and occlusal plane. RESULTS: Bilateral canine impaction was found in 38 subjects, and unilateral canine impaction was present in 64 subjects. Severe resorption was found in 14 canines. There were no significant differences between the occlusal plane and midline distances to the impacted canine cusp tip and root apex (p > 0.05). The midline angulation of right maxillary impacted canines was significantly higher than that of left maxillary impacted canines (p < 0.05), while the occlusal plane angulation of left maxillary impacted canines was significantly higher than that of right maxillary impacted canines (p < 0.05). CONCLUSIONS: Maxillary canine impaction was more frequently seen in female subjects than in male subjects. Lateral incisors were more frequently affected than first premolars, and slight resorption was more frequently seen in adjacent teeth. CBCT assessment of maxillary impacted canines can provide accurate measurements of angular, linear, and resorption parameters.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Maxilar , Diente Impactado , Adolescente , Adulto , Niño , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Masculino , Maxilar/diagnóstico por imagen , Estudios Retrospectivos , Diente Impactado/diagnóstico por imagen , Adulto Joven
17.
Am J Orthod Dentofacial Orthop ; 154(5): 645-656, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30384935

RESUMEN

INTRODUCTION: The aim of this study was to compare the root resorption (RR) of maxillary incisors after traction of unilateral vs bilateral impacted canines with reinforced anchorage. METHODS: This retrospective longitudinal study included 60 cone-beam computed tomography scans of patients with maxillary impacted canines: 30 scans taken before and 30 taken after orthodontic traction with nickel-titanium coil springs. Two groups were formed according to the impaction condition: 15 with unilateral maxillary impacted canines and 15 with bilateral maxillary impacted canines. Three trained orthodontists made the measurements. Demographic variables, occlusal characteristics, skeletal class, and measurements related to canine impaction were collected from the clinical history, dental models, and radiographs of each patient. RR (mm and mm2) for each maxillary incisor was measured in 3 dimensions. Independent t or Mann-Whitney U tests were used, depending on data normality. Multiple linear regression analyses were used to evaluate the influence of all variables (predictors) on RR (α = 0.05). RESULTS: RR did not show significant differences between groups in any section (P > 0.05). No subject had RR greater than 2 mm or 5 mm2. The specific influence of some predictor variables varied depending on the type of maxillary incisor. CONCLUSIONS: RR of maxillary incisors after traction of unilateral vs bilateral impacted canines with reinforced anchorage was similar and is not a risk to the integrity of the maxillary incisor root.


Asunto(s)
Diente Canino , Incisivo/fisiopatología , Métodos de Anclaje en Ortodoncia/métodos , Resorción Radicular , Diente Impactado/fisiopatología , Diente Impactado/terapia , Tomografía Computarizada de Haz Cónico , Diente Canino/diagnóstico por imagen , Femenino , Humanos , Imagenología Tridimensional , Estudios Longitudinales , Masculino , Maxilar , Níquel , Métodos de Anclaje en Ortodoncia/instrumentación , Estudios Retrospectivos , Factores de Riesgo , Titanio , Diente Impactado/diagnóstico por imagen , Tracción , Adulto Joven
18.
Am J Orthod Dentofacial Orthop ; 154(5): 657-663, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30384936

RESUMEN

INTRODUCTION: The aims of this study were to investigate the eruption pattern of maxillary permanent canines in the alveolar cleft area after secondary alveolar bone grafting and to assess the risk indicators for canine impaction. METHODS: The sample consisted of 75 patients with unilateral cleft lip and palate who underwent secondary alveolar bone grafting with rhBMP-2 with a mean age of 9.8 years of age at 1 center. A split-mouth study design was used, with the noncleft hemiarch comprising the control group. Panoramic radiographs taken before, immediately after, and 1 year after secondary alveolar bone grafting were used to assess the following parameters in both cleft side (CS) and noncleft side: canine mesiodistal angulation, canine height relative to the occlusal plane, canine mesial displacement, and superimposition with the neighboring maxillary incisors. The frequency of associated dental anomalies was compared between patients with and without CS canine impaction. Data were evaluated using analysis of variance, t tests, Fisher tests, and multiple logistic regression analysis (P <0.05). RESULTS: On the CS, maxillary canines were usually more mesially angulated and more distant from the occlusal plane compared with the noncleft side. The prevalences of canine impaction on the CS and noncleft side were 24% and 1.3%, respectively. Maxillary impacted canines on the CS demonstrated increased mesiodistal angulation and height at all time points. No association between CS canine impaction and mesial displacement (sectors) was found. An increased prevalence of lateral incisor agenesis on the CS was observed in the subgroup with canine impaction. CONCLUSIONS: Increased mesial angulation and lateral incisor agenesis on the CS are early risk indicators for maxillary canine impaction in patients with unilateral cleft lip and palate.


Asunto(s)
Injerto de Hueso Alveolar/efectos adversos , Labio Leporino/cirugía , Fisura del Paladar/cirugía , Diente Canino/fisiología , Complicaciones Posoperatorias , Erupción Dental , Diente Impactado/etiología , Injerto de Hueso Alveolar/métodos , Anodoncia/patología , Proteína Morfogenética Ósea 2/administración & dosificación , Niño , Diente Canino/diagnóstico por imagen , Diente Canino/patología , Femenino , Humanos , Incisivo/patología , Masculino , Radiografía Panorámica , Proteínas Recombinantes/administración & dosificación , Estudios Retrospectivos , Factores de Riesgo , Diente Impactado/diagnóstico por imagen , Factor de Crecimiento Transformador beta/administración & dosificación
19.
J Dent Child (Chic) ; 85(2): 45-50, 2018 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-30345953

RESUMEN

Purpose: To compare the accuracy of dental age (DA) estimates in children using the Demirjian method and the proportion of root resorption in primary teeth.Methods: Panoramic images from 497 children aged three to 11.99 years were evaluated. Individuals were classified in five groups of two-year age intervals. Seven permanent teeth in the left mandible were scored based on diagrams developed by Demirjian. The proportion of root resorption was determined in the primary mandibular left canine and primary second molar, and age was estimated according to the length of root resorption (one quarter, one half, three quarters).Results: The Demirjian method tended to overestimate DA, except for the 10- to 11.99 year-old category in girls. The greatest overestimation was in four- to 5.99 year-old children. Except for the youngest category, the difference between DA and chronological age, according to the Demirjian method, decreased with increasing age in both sexes. The root resorption method tended to underestimate age, except for canine root resorption in boys.Conclusion: Estimated DA was closest to chronological age when the former was based on canine root resorption. Both the Demirjian and root resorption methods were effective and can be used to determine age in children.


Asunto(s)
Determinación de la Edad por los Dientes/métodos , Radiografía Panorámica , Resorción Radicular , Diente Primario/diagnóstico por imagen , Diente Primario/fisiología , Niño , Preescolar , Estudios Transversales , Diente Canino/diagnóstico por imagen , Diente Canino/fisiología , Femenino , Humanos , Masculino , Diente Molar/diagnóstico por imagen , Diente Molar/fisiología
20.
J Med Case Rep ; 12(1): 305, 2018 Oct 10.
Artículo en Inglés | MEDLINE | ID: mdl-30301465

RESUMEN

BACKGROUND: Dentigerous cysts are common odontogenic cysts associated with unerupted teeth. We describe a previously unreported case of a multidisciplinary approach using surgical, orthodontic, and implant treatment to establish the occlusion for a patient with a maxillary dentigerous cyst. CASE PRESENTATION: An 18-year-old Japanese woman visited our hospital with a chief complaint of gingival swelling in her anterior maxillary region, midline diastema, and tooth crowding. Her main symptom was this gingival swelling. A panoramic radiograph revealed a radiolucent area, 30 mm in diameter, round in shape, and with well-demarcated margins including the maxillary canine. Computed tomography revealed a cystic cavity filled with homogeneous fluid of the same density as water, and a distolingually inclined canine. Our clinical diagnosis was maxillary dentigerous cyst with an unerupted distolingually inclined canine. The selected treatment was marsupialization of the dentigerous cyst, followed by orthodontic traction of the unerupted canine, and simultaneous orthodontic treatment of the midline diastema and tooth crowding. The orthodontic traction failed because the canine did not erupt completely, and the canine was extracted. The treatment plan was then changed to implant treatment after the tooth crowding and midline diastema had been improved. Because the alveolar ridge width was inadequate, the implant was placed after a two-stage implant treatment; therefore, a satisfactory occlusion could be achieved. Our patient did not experience any complications, and the cyst has not recurred. A radiograph taken 7 years after marsupialization of the dentigerous cyst revealed that the cystic cavity had been replaced by new bone. CONCLUSIONS: In general, orthodontic traction of an unerupted tooth after marsupialization should be the best option. However, if orthodontic traction fails, a multidisciplinary approach involving implant treatment may be necessary. We describe a case in which a multidisciplinary approach involving surgical, orthodontic, and implant treatment was used to establish a satisfactory occlusion for a patient with a dentigerous cyst.


Asunto(s)
Diente Canino , Implantación Dental/métodos , Quiste Dentígero , Maxilar , Ortodoncia/métodos , Adolescente , Diente Canino/diagnóstico por imagen , Diente Canino/patología , Quiste Dentígero/diagnóstico por imagen , Quiste Dentígero/patología , Quiste Dentígero/cirugía , Femenino , Humanos , Maloclusión/diagnóstico por imagen , Maxilar/diagnóstico por imagen , Maxilar/cirugía , Radiografía Panorámica/métodos , Tomografía Computarizada por Rayos X/métodos , Diente no Erupcionado/diagnóstico por imagen , Diente no Erupcionado/terapia , Resultado del Tratamiento
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