ABSTRACT
RESUMEN Las anomalías dentarias son producidas por alteraciones en la odontogénesis que se refleja en la variación de tamaño, número y forma de los dientes. Dentro de estas alteraciones se encuentra la fusión dentaria que se considera como la unión de dos gérmenes dentarios que forman una estructura dentaria grande y única. La fusión de las molares es poco habitual tiene una prevalencia muy baja. En el presente caso el diagnóstico fue tercera molar fusionada a cuarta molar retenida en posición vertical. El tratamiento quirúrgico fue la exodoncia a colgajo; para el éxito de la misma se tuvo en cuenta: 1) visualización completa de la corona y 2) eliminación de trabas que impidan la luxación y la avulsión de las piezas fusionadas. Finalmente, la exodoncia se llevó a cabo de manera exitosa.
ABSTRACT Dental anomalies are produced by alterations in odontogenesis which is reflected in the variation in size, number and shape of the teeth. Among these alterations is dental fusion, which is considered as the union of two dental germs that form a large and unique dental structure. The fusion of the molars is rare and has a very low prevalence. In the present case, the diagnosis was that the third molar fused to the fourth retained molar in an upright position. The surgical treatment was flap extraction. For a successful extraction, the following was considered: 1) full visibility of the crown and 2) elimination of obstacles that prevent dislocation and avulsion of the fused pieces. At last, the extraction was carried out successfully.
ABSTRACT
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
ABSTRACT The atrophy of the periodontal ligament places the tooth very close to the bone or another tooth, as occurs in unerupted teeth. The absent interdental bone and the lack of functional periodontal stimulus may lead to the fusion of the appositional layers of cement between the roots of the teeth. Concrescence almost always occurs in the region of the maxillary molars. Asymptomatic, it should always be remembered when the proper response to orthodontic movement is not obtained, and there is no apparent explanation. When surgically extracting a tooth and there is resistance, insisting will not be the best strategy. Moving the teeth with concrescence is not convenient, as it requires very intense forces. Once separated, these teeth can be considered normal for movement. It is possible to separate two teeth presenting concrescence, but it depends on the extension of the area, the surgical access and, especially, the clinical convenience. The tooth to be extracted will be repaired with new cement deposited in the sectioned area. The simple separation with the maintenance of the proximity and the lack of function of one of the teeth will cause a new concrescence. After a period of 1 to 3 months, the separated teeth are biologically prepared to be moved. The most important detail in this separation of teeth presenting concrescence is that the diagnosis should be made in advance, and not at the time of the intervention.
RESUMO A atrofia do ligamento periodontal coloca o dente muito próximo do osso e/ou de outro dente, como ocorre em dentes não irrompidos. O osso interdentário ausente e a falta de estímulo funcional periodontal podem levar à fusão das camadas aposicionais de cemento entre as raízes dos dentes. A concrescência ocorre quase sempre na região dos molares superiores. Assintomática, ela deve sempre ser lembrada quando não se obtém a resposta adequada a uma movimentação ortodôntica, sem uma explicação aparente. Cirurgicamente, quando se está extraindo o dente e ele oferece resistência, insistir não será a melhor estratégia. Movimentar os dentes com concrescência não é conveniente, pois requer forças muito intensas. Depois de separados, esses dentes podem ser considerados normais para a movimentação. É possível separar dois dentes em concrescência, mas depende da extensão da área, do acesso cirúrgico e, em especial, da conveniência clínica. O dente a ser extraído vai reparar-se, com novo cemento depositado na região seccionada. A simples separação, com manutenção da proximidade e da falta de função de um dos dentes, fará com que uma nova concrescência se estabeleça. Transcorrido o período de 1 a 3 meses, os dentes separados poderão, biologicamente, ser movimentados. O detalhe mais importante nessa separação de dentes com concrescência é que o diagnóstico deve ser feito com antecedência, e não no momento da intervenção.
Subject(s)
Humans , Tooth, Unerupted , Molar , Tooth Movement Techniques , Dental CementumABSTRACT
SUMMARY: Paramolar tubercle (PT) is an additional cusp occuring on buccal surface of both upper and lower permanent molars. PT is also known as parastyle when tubercle is present in upper molars, as protostylid when tubercle is present in lower molars. The aim of this study was to evaluate prevalence of PTs in Turkish population with cone beam computed tomography (CBCT). Presence of PT in molar teeth were evaluated retrospectively using CBCT images of 210 patients (102 male, 108 female) between 18-77 years old. A total of 909 teeth were analyzed. Because of various reasons some teeth were excluded and final analyze was done with 653 teeth. Prevalence of PT was found as 2.76 % (18 out of 653). Highest frequency of PT was detected 5 in #27, 4 in #17, 2 in #48 among all molar teeth respectively. In two cases; 2 PTs were on the same tooth, bilateral PT was found only in one case. PT was undetected on upper first molars. Prevalence of PTs on permanent molars is a rare phenomenon in the studied population. Use of CBCT in such anatomic variations will provide valuable and detailed information during treatment modalities. Since this pilot study represents Turkish subpopulation, comprehensive studies with increased number of cases should be undertaken to clarify the prevalence of paramolars in Turkish population. Advanced imaging techniques like CBCT will be more helpful in understanding and detecting exact morphological and anatomical variations of PTs during treatment modalities.
RESUMEN: El tubérculo paramolar (TP) es una cúspide adicional que está en la superficie vestibular de los molares permanentes superiores e inferiores. El objetivo de este estudio fue evaluar la predisposición de TP en la población turca con tomografía computarizada de haz cónico (TCHC). Presencia de TP en dientes molares se evaluaron retrospectivamente utilizando imágenes de tomografia de 210 pacientes (102 hombres, 108 mujeres) entre 18-77 años de edad. Se analizó un total de 909 dientes. Por varias razones, algunos dientes fueron excluídos y el análisis final se realizó con 653 dientes. Prevalencia de PTP se encontró en el 2,76 % (18 dientes de 653). La frecuencia más alta de TP se detectó: 5 en # 27, 4 en # 17, 2 en # 48, entre todos los dientes molares, respectivamente. En dos casos, 2 de los TP fueron observados en el mismo diente; TP bilateral sólo se encontró en un caso. El TP no fue detectado en los primeros molares superiores. La prevalencia de TP en los molares permanentes es un fenómeno poco frecuente en la población estudiada. El uso de la TCHC en tales variaciones anatómicas, proporcionará información valiosa y detallada para definir la aplicación de diferentes modalidades de tratamiento. Dado que este estudio piloto representa a una subpoblación turca, estudios exhaustivos con un mayor número de casos deben llevarse a cabo para determinar la prevalencia en la población turca total. Técnicas avanzadas de imagen como TCHC serán más útiles para detectar variaciones morfológicas y anatómicas exactas de TP durante diversas modalidades de tratamiento.
Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Aged , Cone-Beam Computed Tomography , Molar/abnormalities , Molar/diagnostic imaging , TurkeyABSTRACT
Fusion is a rare developmental anomaly. Th e prevalence ranges from 0.5% to 5% based on geographic, racial, or genetic factors, which occur as a result of physical force or pressure leading to prolonged contact of the adjacent tooth follicles thus resulting in the fusion of tooth buds. Bilateral fusion of teeth has been reported to be very rare as compared to unilateral fusion which is around 0.05%. Although asymptomatic, they can be a predisposing factor for caries and cause periodontal problems due to malalignment in the arch. Th e aim of this article is to present a rare case of bilateral fusion of mandibular anterior teeth and discuss the possible histogenetic mechanism and future treatment prospectives.
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La transposición dental es una alteración de la posición de dos o más dientes en el arco dentario. Su etiología, aún desconocida, se asocia entre otros factores, a la herencia, al trauma dentario y a la persistencia del diente deciduo. El diente donde más se observa es en el canino superior, transposicionado con el primer premolar. Puede ser unilateral o bilateral, y completa o parcial. Esta anomalía puede provocar diversas complicaciones de la estética y la función del aparto estomatognático; por lo que requiere de diagnóstico precoz y en muchas ocasiones, de un enfoque multidisciplinario que permita la evaluación individual de cada caso para su correcto tratamiento. Se presentó un caso clínico de transposición bilateral de caninos superiores, en un paciente con antecedentes de traumatismo dentario no tratado, se tornó complejo su tratamiento debido a las características individuales del paciente.
The dental transposition is an alteration of the position of two or more teeth in the dental arch. Its etiology, still unknown, is associated to heritage, dental trauma and the persistence of the deciduous tooth, among other factors. The tooth where it is observed the most is the upper canine, transposed with the first pre molar. It may be unilateral or bilateral, and complete or partial. This anomaly could cause different complications of the stomatognathic system esthetics and function; therefore, the precocious diagnosis and, in many cases, a multidisciplinary approach are needed to allow the individual evaluation of each case for its correct treatment. It was presented a clinical case of upper canine bilateral transposition in a patient with antecedents of non-treated dental trauma. The treatment became complex due to the patient´s individual characteristics.
ABSTRACT
Dens invaginatus is a developmental malformation that causes changes in the internal anatomy of the tooth. Fusion and twinning are terms commonly used to describe the clinical presentation of double teeth. The presence of double dens invaginatus is extremely rare. Therefore understanding the complex morphology, type and extension of dens invaginatus are very essential. To establish the diagnostic hypothesis based on a periapical radiograph is a challenge for all different dentistry specialties. With cone-beam computed tomography (CBCT), the diagnostic dilemma is minimized because of the accurate visualization of the anatomy. The visualization of three-dimensional structures is very helpful in the diagnosis of these complex anatomic variations as it favors precise definition of the problem and treatment planning. With this case report, we would like to highlight how CBCT helped in the evaluation and treatment planning of Double dens invaginatus of a fused supernumerary tooth and maxillary central incisor, which could not be done using the intraoral periapical method.
ABSTRACT
Objetivos: conocer la prevalencia de Hipomineralización Molar Incisiva (MIH) en Montevideo, Uruguay; relacionar la prevalencia de MIH con: edad, género, año de nacimiento y diferente cobertura asistencial (pública y privada). Se diseñó un estudio transversal, observacional y descriptivo con el total de niños asistidos entre julio-diciembre 2010 en la Cátedra de Odontopediatría, Facultad de Odontología, Universidad de la República y en dos consultorios privados en Montevideo (626), nacidos entre 1993-2003 y con los 4 primeros molares e incisivos permanentes erupcionados. El diagnóstico clínico lo realizaron examinadores calibrados (Kappa intra 100%; inter 0.99, 0.98 y 0.90). La prevalencia de MIH fue de 11.8%, con una diferencia significativa entre sector público y privado y con una alta correlación positiva entre presencia de MIH y año de nacimiento (p<0.0001). Los resultados confirmaron que: 1) MIH es una patología frecuente 2) la prevalencia de MIH a nivel privado es superior 3) es necesario estudios con muestras de mayor tamaño.
Objectives: To know the prevalence of Molar-Incisor Hipomineralization (MIH) in Montevideo, Uruguay; to study the relationship between the prevalence of MIH and: age, gender, year of birth and different health care coverage (private and public). A transversal, observational and descriptive study was designed with the total of the children that were assisted between July and December 2010 in the Pediatric Department, School of Dentistry, Universidad de la República and in two private dentist offices in Montevideo (626), born between 1993 - 2003 and with the first four molars and permanent incisives erupted. The clinical diagnosis was done by calibrated examiners (100% kappa intra, 0.99, 0.98 and 0.90 inter). MIH prevalence was 11.8%, with a significant difference between public and private sector and with a high positive correlation between the presence of MIH and year of birth (p<0.0001). The results confirmed that: 1) MIH is a frequent pathology 2) The prevalence of MIH is higher in the private sector 3) Studies with bigger samples are necessary.
Subject(s)
Tooth Abnormalities , Tooth Demineralization/epidemiology , Child , UruguayABSTRACT
Tooth transposition is a rare developmental anomalyaffecting less than 1% of the population. Thepermanent maxillary canine and 1st premolar are themost commonly affected teeth. Bilateral maxillarycanine-1st premolar transpositions are extremely rarewith only a handful of cases being reported in theliterature. We report one such case of bilateralmaxillary canine-1st premolar transposition in a 28year old Malaysian female which was associated withother dental anomalies.
ABSTRACT
El diente invaginado es una malformación que resulta probablemente de un desdoblamientode la papila dental durante el desarrollo dentario. Los dens invaginatus son dientes clínicamentesignificativos, debido a la gran facilidad de afección de la pulpa. La profundidaddel defecto estructural varía de una leve ampliación del cíngulo a una invaginación quese extiende al ápice. El presente artículo relata el caso de una mujer de veintitrés años deedad, quien refiere una fístula de diez años de evolución en la mucosa en el fondo de sacoa la altura del diente lateral superior izquierdo (diente 22). Luego de la exploración clínica yradiográfica se diagnostica un dens in dente unilateral con necrosis pulpar y absceso apicalcrónico, para lo cual se realizó terapia de conductos y cirugía apical con éxito radiográficode dos años de evolución...
Invaginated tooth is a malformation likely resulting from a splitting of dental papilla duringtooth development. Dens invaginatus are clinically important teeth due to the easy affectionof the dental pulp. Invagination depth varies from a slight enlargement of the cingulum untoan extended invagination to the apex. This article reports the case of a female patient aged23, who referred fistula with ten years of evolution in tooth 22. The clinical and radiographicdiagnosis was dens in dent with necrosis and chronic suppurative periapical periodontitis.The root canal therapy and apical surgery were performed showing successfully radiographicevolution within a two-year follow-up period...
Subject(s)
Tooth Abnormalities , Surgery, Oral , Endodontics , Oroantral Fistula , Tooth Movement TechniquesABSTRACT
The dental gemination is a morphological alteration that can occur during the development of the dental germ, resulting in a total or partial formation of two teeth which are not completely separate. The aim of this work was to relate an unusual case of gemination by the periapical radiography of superior central incisive in the permanent dentition.
La geminación dental es una alteración morfológica que puede suceder durante el desarrollo dental del embrión, dando por resultado la formación parcial o total de dos dientes que no estén separados totalmente. El objetivo de este trabajo fue describir un caso infrecuente de geminación, a través de la radiografía periapical en incisivos centrales superiores en la dentición permanente.