Tooth Transposition Research Articles

Dental transpositions: An update for clinicians.

Transposition of teeth may present to the general dental practitioner and in some circumstances transposed teeth may present with other dental anomalies. Although dental transpositions are rare anomalies, management of transposed teeth can often be complex, requiring multidisciplinary management. It is therefore important for dentists to be familiar with the clinical and radiographic presentation of transpositions and understand the aetiology to aid early diagnosis and appropriate management.Clinical relevance: Dentists are best placed to detect transposed teeth and should be familiar with the clinical and radiographic presentation, aetiology, and classification of transpositions in order to aid early diagnosis and their subsequent management.

A study of tooth agenesis in a sample of Malagasy orthodontic patient

The aim of this study was to describe the specific features of dental agenesis in Malagasy people. A retrospective cross-sectional study was conducted in two private orthodontic clinics in the city of Antananarivo, Madagascar. A total of 72 panoramic radiographs of patients aged more than 7 years old and undergoing orthodontic treatment between January 2008 and September 2022 were examined. Dental agenesis was declared in the absence of crown mineralization on the radiograph. Wisdom teeth agenesis was not considered in this study. Data were collected, coded, processed, and analyzed using SPSS 20.0 software. Statistical significance was set at p < 0.05. A significant predominance of females (72.2% vs. 27.8%) was observed among subjects with tooth agenesis (p < 0.000). The mandible was the most affected arch (57%). The mandibular lateral incisor (83%) was the most frequently absent tooth, followed by the maxillary lateral incisor (69.3%) and the mandibular second premolar (12.2%). Dental position anomalies associated with agenesis included impacted tooth (41.7%) and tooth transposition (4.2%). The general characteristics of tooth agenesis in our study population did not show any major differences compared to previous researches in other countries. However, a difference linked to ethnic origin was observed regarding the type of tooth most frequently affected by agenesis.

Successful treatment of an impacted maxillary canine using closed surgical exposure: A case report

Impaction of a maxillary canine is a common tooth transposition, being the second most frequently impacted tooth after third molars. Management of such cases typically require a multidisciplinary approach, combining surgery with orthodontics. Presented is a case involving a 12-year 7-month-old male patient with an impacted right maxillary canine, premature loss of the second deciduous right maxillary molar and hypoplasia of the maxilla. Treatment included extraction of the premolars with surgical exposure and subsequent guided eruption of the impacted canine into the tooth arch.

Diagnosis and orthodontic treatment strategy of complete canine transposition

Tooth transposition is a challenge for orthodontists, especially in correcting the order of teeth. At present, the literature on transposition canines mainly focuses on epidemiological studies and case reports, and no systematic treatment guidance has been formed. In this article, the definition and classification, epidemiology and etiology, imaging diagnosis, treatment and risk control of transposed canines are systematically described in order to provide reference for clinical practice.

Pseudo transposition of the mandibular lateral incisor to the first premolar space: A literature review and case series.

Tooth transposition is the positional interchange of two adjacent teeth, which may be incomplete or complete. The root apex may remain in a normal position despite a severely displaced crown. The aim of this paper is to provide a literature review on the incidence, aetiology and treatment options for pseudo-transposed mandibular incisors. A case series is also presented highlighting the various management techniques that have been utilised in treating five cases of pseudo-transposed mandibular lateral incisors.

Prevalence of Tooth Transposition among Orthodontic Patients in Spain.

The aim of this retrospective study was to analyze the prevalence of tooth transposition within an orthodontic population and explore its correlation with facial biotype, skeletal class and sex. This study examined a sample of 2,500 initial orthodontic records from consecutive orthodontic patients who received treatment at the Master Universitario de Orthodontia (Madrid, Spain) between 2014 and 2023. Patients exhibiting incomplete or poor-quality medical records were excluded from the study. The chi-square test was used to assess variations in distribution based on facial biotype, skeletal class and sex. A p-value of < 0.05 was considered statistically significant. The study findings revealed a tooth transposition prevalence rate of 0.28%. No significant differences in prevalence were observed based on sex or facial biotype, but the prevalence of transposition was found to be higher among class I patients (p < 0.05). The prevalence of tooth transposition among orthodontic patients is relatively low (0.28%). However, it is more commonly observed among patients with skeletal class I malocclusion.

Comparisons of Dental Anomalies in Orthodontic Patients with Impacted Maxillary and Mandibular Canines.

To assess the presence and possible associations between the type of dental anomalies and maxillary and mandibular canine impactions in orthodontic patients treated for canine impaction, panoramic radiographs of orthodontic patients treated for canine impaction were assessed for the presence of associated dental anomalies. A random sample of orthodontic patients without canine impaction matched for age and gender served as controls. Descriptive and exact inferential statistics were implemented in order to assess potential associations between canine impaction and dental anomalies. A total of 102 orthodontic patients with 70 maxillary (MaxCI) and 32 mandibular (ManCI) canine impactions were assessed. The control group included 117 orthodontic patients. Dental anomalies were present in more than 50% of patients with impacted canines and in 20% of the controls. Tooth agenesis was significantly more common in the MaxCI group when compared to the ManCI group, while supernumerary teeth and canine transmigration were registered more often in the ManCI group. When compared to the control group, peg-shaped maxillary lateral incisors and tooth agenesis were significantly more prevalent in the MaxCI group, while canine transmigration, supernumerary teeth, the agenesis of mandibular incisors and tooth transpositions were significantly more prevalent in the ManCI group. The impaction of other teeth was significantly more common in both canine impaction groups when compared to the controls. The prevalence of dental anomalies in orthodontic patients with impacted canines was higher than in orthodontic patients without canine impaction. Different types of tooth anomalies were found in the MaxCI and ManCI groups.

Supernumerary Maxillary Canine along with Transposition: A Case Report

Introduction: Tooth transposition is considered as the anomaly of tooth position in two adjacent teeth; the most frequent locations include canine and first maxillary premolar. Transposition may happen along with hypodontia, supernumerary teeth, or the persistence of a deciduous predecessor. Supernumerary teeth are considered as the teeth in excess of the normal dentition. Supernumerary teeth can happen in any region of the dental arch. Nevertheless, having supernumerary tooth accompanied by transpositions in the canine area is a rare condition. The aim of this report was introducing a patient with supernumerary maxillary canine along with transposition. A 14-year-old boy without any skeletal, systemic, metabolic and mental problems was referred to the Orthodontic Department of Yazd Dental School, Yazd, Iran. In the clinical study of displacement of the upper canine in the anterior region of the upper jaw, which has led to crowding and buccal protrusion of the main canine of the upper jaw. This supernumerary canine tooth with displacement was discovered based on routine radiological examinations.&#x0D; Conclusion: The presence of a supernumerary tooth with transposition usually causes occlusion and functional problems in patients. In these cases, a complete clinical and radiographic examination along with a detailed history should be done in order to plan the appropriate surgical, orthodontic, and restorative treatment plan. Early detection is essential to prevent these problems.

Common dental anomalies affecting patients with cleft lip and palate

Patients with cleft lip and/or palate (CLP) have increased experience of dental anomalies compared to unaffected individuals. This article describes the common dental anomalies, namely, enamel defects, hypodontia, anomalies in tooth shape or form, supernumerary teeth, ectopic and impacted teeth, and tooth transposition. The respective prevalence and potential implications on dental health are also discussed alongside the role of the general dental practitioner. CPD/Clinical Relevance: This article highlights the common dental anomalies for those with cleft lip and/or palate, and identifies clinical presentations that require GDPs' contribution to patients' dental care.

Prevalence of dental anomalies in a sample of growing subjects: a retrospective study.

dental anomalies are a group of disorders characterized by alterations in tooth number, shape, size, structure, development, and timing of eruption due to genetic and environmental factors. to identify the prevalence of dental anomalies in a large sample of non-orthodontic subjects. a retrospective chart review was conducted based on digital panoramic radiographs by two examiners who assessed the presence of displacement of the maxillary canines (DMC), impacted teeth (IT), tooth agenesis (TA), supernumerary/supplementary teeth (ST), and tooth transpositions (TT). radiographs of subjects aged between 8 and 18 years were analysed. A chi2 test was employed to assess possible associations between the number and type of dental anomalies and patients' gender. When an association was present, a binary logistic regression was conducted to calculate the odds ratio between the variables. The significance level was set at p<0.05. a total of 1,124 subjects (25.7%) showed at least one dental anomaly. DMC (12.1%) and IT (12%) were the most frequent dental anomalies. The most represented impacted teeth were the upper canine (9.2%) and the upper central incisor (1.3%). TA was detected in 296 radiographs (6.8%), with 134 showing two or more TA. The prevalence of ST and TT in the total sample was 2.2% and 0.7%, respectively. Associations were found between ST and IT, between TA and DMC, and between TA and IT. the results obtained encourage the radiographic investigation of dental anomalies at an early stage.

ORTHODONTIC CORRECTION OF COMPLETE TRANSPOSITION BETWEEN MAXILLARY CANINE & LATERAL INCISOR : A CASE REPORT

Transposition of maxillary teeth is not very uncommon nding in clinical practice and poses a challenge to the clinician. Maxillary canine is the most commonly involved tooth in transposition exchanging its place with either lateral incisor or rst premolar. This case report describes successful management of a case of transposition between maxillary canine and lateral incisor involving right side st only with an insight into etiology, treatment alternatives and treatment procedure. This case had been treated with extraction of all four 1 premolars and involved teeth were successfully moved to their clinically normal position without any signicant damage to supporting structures or roots.

Multidisciplinary Treatment of a Patient with Dilacerated and Transposed Teeth

Tooth transposition can be described as interchange in position of two adjacent permanent teeth in the same quadrant. A case with a maxillary permanent dilacerated central and tranposition of canine-lateral incisor, treated with forced eruption and piezosurgical technique to shorter treatment time. Treatment is challenging for both orthodontists and oral surgeons. Using cone-beam computed tomography is necessary to correct localization and treatment planning. In this case report, successful eruption of the high vestibule dilacerated central incisor and canine transposition was performed so that the lateral incisor could be preserved in canine position. After orthodontic treatment, the patient smile esthetics and occlusion were significantly improved.

Long term radiographic evaluation of a potentially impacted and dilacerated tooth into complete transposition

Background: Anomalies such as ectopic tooth eruption and transposition are challenging situations that may complicate the orthodontic treatment. Some of these anomalies can only be diagnosed and managed by accurate long-term radiographic examination. Delayed diagnosis could impede simple preventive orthodontic measurements and cause more costly and consuming future complicated orthodontic treatment.Case Description: We described in detail the long term follow-up of a young female patient referring with a unilateral ectopic eruption. The patient was under close observation and regular orthodontic treatment to guide a unilateral ectopic eruption into a complete transposition of an upper left canine and first premolar. The long term follow-up revealed stables results.Practical Implications: Early diagnosis and preventive measurements in patients suffering from anomalies such as ectopic eruption is crucial in order to avoid further complications such as tooth impaction and dilaceration formation and adopting the best choice of treatment.

Two-phase orthodontic treatment of two different types of tooth transposition in the same patient.

Orthodontic treatment is thoroughly planned considering the patient's facial and dental characteristics, the main complaint, treatment time and the orthodontist's experience. Transposition is a form of ectopia, in which two adjacent teeth exchange positions in the dental arch. Transposition can be partial or complete. This article reports the treatment of a female patient with two kinds of tooth transposition managed in the mixed and permanent dentitions. A girl, aged eight years and three months, came to routine paediatric consultation with an ectopic permanent mandibular left lateral incisor in the mixed dentition. Radiographic analysis indicated partial transposition of the permanent mandibular left lateral incisor and canine (Md.L2.C), and development of a complete tooth transposition between the permanent maxillary right first pre-molar and canine (Mx.C.P1). The patient was treated in two phases. The first, in the mixed dentition, and the second, in the permanent dentition with a three-year follow-up between them. These challenging treatment approaches are described in detail, including the mechanics used. The key points of this treatment were early diagnosis of the ectopic mandibular lateral incisor, use of light forces and interphase patient follow-up. These determined the best time to start the second treatment phase, enabling achievement of aesthetic and functional outcomes, and the results remained stable one year after the end of orthodontic treatment.

Sella turcica bridging and ponticulus posticus calcification in subjects with different dental anomalies

This study aimed to evaluate and compare the bridging and dimensions of the sella turcica and calcification of the ponticulus posticus in subjects with different dental anomalies. Pretreatment recordsof orthodontic patients with palatally impacted canines (n=95), mandibular second premolar agenesis (n=45), maxillary lateral incisor agenesis (n=75), tooth transpositions (TT, n=25), peg-shaped maxillary lateral incisors (n=30), and third molar agenesis (TMA, n=145) were analyzed and compared with the control group (CG) consisting of 145 subjects with skeletal Class I malocclusion and no dental anomalies. The length, diameter, and depth of the sella turcica were calculated for each patient. The degree of sella turcica bridging was scored as type I, II, and III, whereas the extent of ponticulus posticus was classified as Class I, II, and III. Only decreases in the length and diameter of the sella turcica in subjects with TT were found to be statistically significant. Although type II bridging frequency was found to be significantly lower in subjects with mandibular second premolar agenesis, maxillary lateral incisor agenesis, TT, and TMA, type III bridging frequency was found to be significantly higher only in subjects with TMA. The decrease in Class I calcificationfrequencies and the increase in Class II calcification frequencies were found to be significant in subjects with palatally impacted canines, TT, and TMA compared with the CG. In addition, the presence of Class III calcification was found to be significantly more frequent in subjects with TMA than in the CG. Although type II and type III bridging frequencies were found to be higher than in previous studies because of the higher type II bridging frequency in the CG, type II bridging frequency was found to be insignificant. Furthermore, an increased frequency of ponticulus posticus calcification was observed in subjects with palatally impacted canines, TT, and TMA.

New species of Philobryidae (Bivalvia: Pteriomorphia) from Patagonian and Antarctic waters

Despite being one of the most diversified families of mollusks in sub-Antarctic and Antarctic waters, Philobryidae Bernard, 1897 still appears as a poorly studied family of bivalves. The aim of this study is to contribute to a better understanding of this family, by redescribing Philobrya wandelensis Lamy, 1906 and describing three new species from Patagonia and the adjacent Antarctic waters. Two new species here described closely resemble P. wandelensis, and in fact, at least one of them was previously reported in the literature under that name. The hinges of these species are compared with that of Bryophila setosa Carpenter, 1864, the type species of Philobrya J.G. Cooper, 1867, for which the ontogenetic variation is described for the first time. Furthermore, Hochstetteria Vélain, 1877 is removed from the synonymy of Philobrya, as regarded by several recent authors. The remaining new species described belongs to Verticipronus Hedley, 1904 (type species: Verticipronus mytilus Hedley 1904; lectotype here designated), a genus here reported for the first time in Patagonian waters. New arguments supporting the placement of Verticipronus in Philobryidae are provided. The new species here described presents transposition of hinge teeth. The frequency of this phenomenon in that species proved to be higher than that reported for any other bivalve.

Surgical Management of Multiple Dental Anomalies in an Adolescent: A Case Report

Introduction: Unerupted or impacted teeth are commonly seen in young adolescents, whilst transposition of teeth is fairly uncommon. Paediatric patients presenting with an impacted or missing permanent tooth can complicate what may otherwise be a straightforward transition to the permanent dentition. In patients with multiple impacted teeth or transposition of teeth, the complexity of the case is increased further. Case Report: We present a case of impaction and transposition in an adolescent, managed by surgical technique only, using autotransplantation and corticotomy. This technique permitted rapid positional changes of the teeth to give an immediate aesthetic and functional improvement, with less reliance on longterm patient compliance. Conclusion: This report discusses the complexity of different treatment options that could have been undertaken. A multidisciplinary approach gave more treatment options to the patient, and total surgical management had many clinical advantages, along with a huge reduction in overall treatment time.

Mandibular premolar transposition: A rare case report

Tooth transposition is one of the most difficult dental anomalies to treat in the dental clinic. The etiology of tooth transposition has been the subject of much controversy and is still not completely understood. Multifactorial genetic factors, an interchange in the position of the developing dental lamina of the involved teeth, and even trauma to the deciduous teeth in which dilacerations of the permanent incisor root was found have all been suggested as causes for transposition of teeth. The management of posterior tooth transposition is purely subjective until and unless the patient reported with some unstable occlusal patterns or functional insufficiency. This present case report with complete transposition of mandibular left second premolar erupted in the site of mandibular left first molar in a 42-year-old female patient is a rare case entity for clinical consideration.

Canine Transposition - Prevalence, Distribution and Treatment Considerations among Orthodontic Patients.

To determine the prevalence and distribution of canine transposition in a sample of orthodontic patients and present treatment alternatives and outcome. The records of 3000 consecutively treated orthodontic patients from a university clinic were surveyed to detect canine transposition in both dental arches. The data was recorded according to gender, age, number and location. Canine transpositions were detected in 15 subjects, 3 (20%) males and 12 (80%) females presenting a prevalence of 0.5%. Of them, 6 were between the maxillary canine and first premolar, 7 between the maxillary canine and lateral incisor, 2 transpositions were between the mandibular canine and the lateral incisor. A female to male ratio of 4:1 with left side predominance was found. Treatment options include extracting the transposed teeth, maintaining them in their transposed position, or repositioning them in their normal place within the dental arch. The prevalence of canine transposition in the present sample was found to be 0.5% with a greater frequency in the maxilla. Treatment options include extraction of one of the transposed teeth, alignment of the teeth in their transposed position or correction of the anomaly. The latter gives the best esthetic outcome.

A Unique Treatment Approach for Orthodontic Correction of a Unilateral Maxillary Canine-Lateral Incisor Transposition with Contralateral Impacted Maxillary Second Premolar

Tooth transposition is an unusual form of positional interchange of two adjacent teeth. The maxillary canine is the most frequently involved tooth. This is a case report of a complete left maxillary canine transposition with lateral incisor and impacted right maxillary 2nd premolar. Careful planning of the orthodontic transposition correction was done, and teeth were followed meticulously to their normal positions.