Evaluación del taurodontismo en radiografías panorámicas en una población peruana / Evaluation of taurodontism in panoramic radiographies in a Peruvian population

RESUMEN El taurodontismo es una alteración en la morfología dentaria, la cual tiene implicancias clínicas en diferentes áreas de la odontología. Objetivo: Evaluar el taurodontismo en radiografías panorámicas en una población peruana. Material y métodos: Se evaluaron 220 radiografías panorámicas digitales en las que se clasificó el tipo de taurodontismo en primeros molares permanentes según el método de Shifman y Chanannel. Las observaciones fueron registradas en una ficha de datos. Resultados: El 51% pertenecieron al sexo masculino y el 49 % al femenino. La frecuencia de taurodontismo según sexo, fue mayor en hombres en 24%, y en mujeres fue 20%. El tipo de taurodontismo más frecuente fue el hipotaurodontismo en un 80%. La localización y la primera molar más frecuente fue el maxilar superior con un 68% y la molar superior izquierda con un 37%, respectivamente. Conclusión: La evaluación de taurodontismo en radiografías panorámicas digitales se caracterizó por ser más frecuente en hombres, en cuanto al tipo y localización resultó ser más frecuente el hipotaurodontismo y maxilar superior respectivamente. Además, se caracterizó por ser más frecuente en los primeros molares superiores del lado izquierdo.

ABSTRACT Taurodontism is a dental anomaly, so it has clinical implications in different areas of dentistry. Objective: To evaluate taurodontism in panoramic radiographs in a Peruvian population. Material and methods: 220 digital panoramic radiographs were evaluated in which the type of taurodontism was classified in permanent first molars according to the Shifman and Chanannel method. Observations were recorded on a data sheet. Results: 51% belonged to males and 49% to females. The frequency of taurodontism, according to sex, was higher in men in 24%, and in women it was 20%. The most frequent type of taurodontism was hypotaurodontism in 80%. The most frequent location and first molar was the upper jaw with 68% and the upper left molar with 37%, respectively. Conclusion: The evaluation of taurodontism in digital panoramic radiographs was characterized by being more frequent in men, in terms of type and location, hypotaurodontism and maxilla, respectively, were more frequent. Furthermore, it was characterized by being more frequent in the upper first molars on the left side.

Bilateral taurodontism in permanent maxillary first molar

Taurodontism is a dental anomaly caused due to the failure of Hertwig's epithelial sheath to invaginate at the proper horizontal level. A huge pulp chamber, displacement of the pulpal floor apically, and no constriction at the level of the cementoenamel junction are the key features representing a taurodontic tooth. This condition is most commonly associated with permanent molars. This clinical entity occurs in the form of an isolated, singular trait in majority of the cases. However, seldom, it may be associated with syndromes or ectodermal anomalies. The large and deep pulp chamber makes instrumentation of canals difficult, thereby challenging an endodontist. This case report describes the endodontic challenge faced in cases of taurodontism as well as the clinical steps involved in its successful endodontic management. Furthermore, it shows the typical presence of bilateral hypertaurodontism with respect to the maxillary first molar.

Effective Debridement And Subsequent Obturation Of Tooth With Morphoanatomic Variations In Non Syndromic Patients– A Series Of 3 Case Reports

Taurodontism is a morphoanatomical anomaly of teeth characterised by enlarged pulp chamber with apically displaced pulp chamber floor and furcation.Endodontic treatment of a taurodont is challenging and requires special handling because of proximity and apical displacement of roots. In performing root canal treatment on such teeth, one should appreciate the complexity of the root canal system, canal obliteration and configuration, and the potential for additional root canal systems. Careful exploration of the grooves between all orifices particularly with magnification, use of ultrasonic irrigation; and a modified filling technique are of particular use. This paper presents three case reports on diagnosis and successful endodontic management of hypertaurodontic teeth, in non-syndromic patients

Dental Management in a Patient with Turner Syndrome with Dental Anomalies: A Case Report / 대한소아치과학회지

Turner syndrome (TS) is a chromosomal disorder caused by monosomy of the X chromosome, with complete or partial absence of the second sex chromosome. Anomalies of root morphology have been found to occur more often in patients with TS, which make endodontic treatment challenging and requires special handling. The patients with TS may also have systematic problems such as cardiac or renal malformations, so in treating these patients it is important for clinicians not only to be aware of the characteristic intraoral findings, but also to make the patients have regular dental check-ups to prevent oral complications in advance.An 12-year-old girl who had been diagnosed with TS at the age of 10 years was referred due to discomfort in the bilateral mandibular premolar regions. Dens evaginatus and taurodontism were detected in all the mandibular premolars characteristically. The bilateral mandibular first premolars had three roots and the bilateral mandibular second premolars had periapical lesion with two roots. Due to the complexity of the root canal anatomy, root canal treatment were completed with a dental microscope to ensure adequate visualization. After 2 years of regular follow-up examinations, there were no clinical sign or symptom associated with the teeth, and no periapical lesion, was found.This case report describes the characteristic oral features and dental management of TS patients.

Nfic regulates tooth root patterning and growth / 대한해부학회지

Molecular interactions between epithelium and mesenchyme are important for root formation. Nuclear factor I-C (Nfic) has been identified as a key regulator of root formation. However, the mechanisms of root formation and their interactions between Hertwig's epithelial root sheath (HERS) and mesenchyme remain unclear. In this study, we investigated the role of Nfic in root patterning and growth during molar root development. The molars of Nfic knockout mice exhibited an enlarged pulp chamber and apical displacement of the pulpal floor, characteristic features of taurodontism, due to delayed furcation formation. In developing molar roots of mutant mice at P14, BrdU positive cells decreased in the apical mesenchyme of the elongation region whereas those cells increased in the dental papilla of the furcation region. Whereas cytokeratin 14 and laminin were localized in HERS cells of mutant molars, Smoothened (Smo) and Gli1 were downregulated in preodontoblasts. In contrast, cytokeratin 14 and Smo were localized in the cells of the furcation region of mutant molars. These results indicate that Nfic regulates cell proliferation in the dental mesenchyme and affects the fate of HERS cells in a site-specific manner. From the results, it is suggested that Nfic is required for root patterning and growth during root morphogenesis.

Prevalence of dental anomalies on panoramic radiographs in a population of the state of Pará, Brazil.

Introduction: Dental anomalies (DAs) are the result of disorders that are able to modify the shape, number, size, and structure of teeth. This study aimed to evaluate the prevalence of DAs using panoramic radiographs in a population of the City of Belém, northern Brazil. Materials and Methods: In this study, 487 panoramic radiographs were evaluated searching for DAs. Dental records were reviewed for diagnostic confirmation. DAs related to the shape, number, size, and structure of teeth were investigated. Results: Our results showed a DA prevalence of 56.9%. The most prevalent DA was taurodontism, which was present in 27.19% of cases. Root dilaceration was the second most prevalent DA in adults, whereas hypodontia was the second most prevalent DA in children. A total of 13 DAs were found. Conclusions: Dental anomalies were present in over half of the sample, and most of them were related to the shape of the teeth. Although there was a high prevalence of shape-related DAs, these alterations are generally of lower severity, and most do not require specific treatment. However, in 19.25% of cases, DAs were found involving the number, size and structure of the teeth. These DAs should be diagnosed and treated early, avoiding thus more serious complications.

Interradicular dentin dysplasia associated with amelogenesis imperfecta with taurodontism or trichodentoosseous syndrome: A diagnostic dilemma.

Amelogenesis imperfecta is a hereditary disorder with diverse clinical presentation, where enamel is the tissue that is primarily affected either quantitatively or qualitatively. Hypomaturation/hypoplastic amelogenesis imperfecta with taurodontism is a rare variant of amelogenesis imperfecta which is often confused with trichodentoosseous syndrome. We report a rare case of hereditary enamel defect with taurodontism associated with interradicular dentin dysplasia.

Endodontic treatment in primary molars with taurodontism.

Dental morphological traits are of particular importance in the study of phylogenetic relationships and population affinities. One of the most important abnormalities in tooth morphology is Taurodontism. Taurodontism can be defined as a change in tooth shape caused by the failure of Hertwig’s epithelial sheath diaphragm to invaginate at the proper horizontal level. An enlarged pulp chamber, apical displacement of the pulpal floor, and no constriction at the level of the cementoenamel junction are the characteristic features. Although permanent molar teeth are most commonly affected, this change is very rarely seen in primary dentition. Taurodontism has a very low incidence in primary dentition and very few cases have been reported in the literature. Endodontic treatment of a taurodont tooth is challenging, because it requires special care in handling and identifying the canal obliteration and configuration and the potential for additional root canal systems. This paper highlights a case report of taurodontism in primary molars of a five year old male child with endodontic treatment.

An unusual case of non-syndromic occurrence of multiple dental anomalies.

Dental anomalies have been known to occur in humans due to a variety of genetic and environmental factors. Combinations of dental anomalies are known to be associated with specific syndromes. A few cases of multiple dental anomalies have been reported in patients with no generalized abnormalities. This case report describes an unusual occurrence of a combination of dental anomalies in an apparently normal healthy 12-year-old female patient. The dental anomalies in this patient were multiple dens invaginatus, generalized enamel hypoplasia, generalized microdontia, root resorption and multiple periapical lesions, shovel shaped incisors, cup shaped premolars, taurodontism, hypodontia and supernumerary teeth.