Tooth Transposition Research Articles

Tooth transposition prevalence and type among sub-Saharan Africans.

Although rare, tooth transposition-an exchange in location of two teeth-is a frequent topic of study. Clinical and, to a much lesser extent, dental anthropological research have focused predominantly on prevalence (0.03%-0.74% in several world populations) and case studies, albeit on a restricted spatiotemporal scale. Many regions have received little attention, including sub-Saharan Africa, while premodern data are few. Here, the aim is to supplement both fields of dental research by reviewing previous publications, and newly reporting transposition rates, types, and co-occurring abnormalities in time-successive samples across the subcontinent. Dental data in 51 sub-Saharan samples (>2500 individuals) dating >10 000 BC to 20th century were recorded. Of these, 36 are of modern and 15 premodern age, comprising males and females ≥12-years of age. Transposition presence, quadrant, and type were tabulated, cases described, and prevalence presented. In the latter case, Poisson 95% confidence intervals were calculated to better discern true population rates at various geographic levels. Overall, six of 1886 modern individuals (0.32%) and one of premodern age evidence Mx.C.P1, an exchange of the maxillary canine and first premolar. Various associated dental abnormalities are also evident, including retained deciduous teeth, reduced permanent crowns, and agenesis. This study provides additional insight into the geographic distribution, features, and time depth of transposition, along with hints supporting a genetic etiology and, potentially, some indications of diachronic change from an initial Mx.C.P1 to several types more recently based on premodern evidence. It is of clinical concern today, but is not just a modern anomaly.

Perawatan Ortodontik pada Kasus Distoversi Insisivus Sentral dan Transposisi Kaninus dan Insisivus Lateral Kanan Rahang Atas (Tahap Pertama)

<p><em><strong>Background:</strong> Tooth transposition is a rare and severe positional anomaly that may create many orthodontic problems from both esthetic and functional points of view. In this</em><em> case</em><em> report, the orthodontic management </em><em>of distoversion upper central incisor and</em><em> transposition of the upper right canine and lateral incisor. The patient was treated with a fixed appliance for 4 months. At this moment the central incisor</em><em> has</em><em> already corrected, </em><em>lateral incisor has also erupted and aligned. Patient management should be continued with phase two treatment to correct the transposition of canine</em><em>.</em></p><p><em><strong>Keywords</strong>: </em><em>Distoversion</em><em>, tooth transposition, orthodontic management.</em></p><p><em><strong>Correspondence :</strong> Departement of Pediatric Dentistry, College of Dentistry, University of Airlangga, Surabaya, East Java, Indonesia.</em></p><p><strong> </strong></p>

Maxillary tooth transpositions and pressure root resorption: a case report

Introduction: Tooth developmental disturbances may occur by anomalies in position, number, shape and tooth size [1], and is genetic-related [2–4]. Transposition is an unique and extreme form of ectopic eruption in which a permanent tooth develops and erupts in the position normally occupied by another [5]. Although transpositions are quite common in canines [6–8], this condition rarely occurs with incisors or premolars [6,9]. On the other hand, pathologic root resorption can be observed during eruption of permanent dentition [10], but is very unusual in maxillary first molar. Materials and methods: A 12-year-old male was referred to the Orthodontics Department of Egas Moniz Dental Clinic complaining with severe pain on the left side of the maxillary and premolars transposition on the right side. After clinical and radiographic examination, through orthopantomography and cone-beam computerized tomography (CBCT) severe root resorption of the left maxillary first molar caused by abnormal eruption of the second premolar was diagnosed. Futhermore, the transposition of the upper right premolars was confirmed and severe transversal collapses (Pont’s Premolar Index: -13,5 mm; Pont’s Molar Index: -14,4 mm), ectopic upper canines, maxillary compression, crossbite between 1.6 and 4.6, skeletal Class I and unilateral Angle Class II, diagnosed. Discussion and conclusions: According to the literature, the frequency of tooth transposition is less than 0.4% [7,8,11,12]. In most cases they are more common with unilateral occurrence [4,8,9], on the left side as opposed to the right side [7,8], and have been found more often in the maxilla [4,7]. Our case is significant because this patient is male and typically this has been found more often in females [4,6,7] and tooth transpositions in premolars and pressure root resorption of the maxillary first molar are extremely rare [6,9,10]. Figure 1. Intraoral view of transposition of maxillary permanent first and second premolars, bilateral ectopic of maxillary permanent canines, absence of the second premolar. Central image show a radiographic view that demonstrates impacted tooth pressure root resorption of maxillary first molar by an impacted second premolar. Right image show transposition of maxillary permanent first and second premolars.

Dental transposition of Mx.C.I2 and associated with supernumerary teeth

Tooth transposition is a reversal of position between two teeth in the same quadrant of the dental arch, which can be complete tooth transposition or incomplete tooth transposition, multifactorial causes, and may be associated with other dental anomalies; tooth transposition can be considered a rare phenomenon. Here, we present dental transposition of the central and lateral incisor and associated with supernumerary teeth.

Transposition of Teeth and its Management in Orthodontics

Transposition of Teeth and its Management in Orthodontics

Tooth transposition: two case-reports and literature review

Tooth transposition is a rare developmental disorder in which a normal tooth erupts in an inappropriate position. The change in position occurs between two adjacent teeth within the same quadrant. In this article, two cases of tooth transposition involving mandibular molars are described. Patient 1 presented with bilateral transposition between first and second mandibular molars. In addition, giroversion of the first molars was observed. Patient 2 presented with unilateral transposition between the mandibular left molars. Because this tooth disorder does not affect quality of life, both patients declined to seek dental treatment. Out of the 120 cases of tooth transposition found in the literature, 92,5% occurred in the maxilla and 15% were bilateral, 65,8% percent of these cases involved the canine and first premolar; 26.6% involved the canine and lateral incisor; 2,5% involved the canine and central incisor; and only 0.85% involved the first and second molar. The majority of tooth transposition cases occurred in women (66,6%). In literature, tooth transposition is a poorly-documented condition. Consequently, this report seeks to contribute to the existing information in the literature on this disorder.

Novel dental phenotype in non-syndromic Pierre Robin Sequence: A retrospective study

ObjectiveThe objective was to investigate dental phenotypes in individuals with non-syndromic Pierre Robin Sequence (ns-PRS) and compare the prevalence of these phenotypes with subjects with non-syndromic cleft palate (ns-CP) and a control group with subjects without any craniofacial anomalies. MethodsA total of 760 panoramic radiographs of 330 individuals (110 with ns-PRS; 110 with ns-CP and 110 without any malformations) were digitized and evaluated regarding the diagnosis of taurodontism, tooth agenesis, root dilaceration and tooth transposition. Chi-square test was applied to compare the occurrence of dental phenotypes between groups. A P value of less than 0.05 was considered statistically significant. ResultsTotal prevalence of dental phenotypes was 94.5% of ns-PRS; 54.5% of ns-CP and 59.1% of the control group subjects with a statistically significant difference for the ns-PRS when compared to the other two groups. Two dental phenotypes, taurodontism and dental agenesis were identified with statistically significant higher prevalences in subjects with ns-PRS when compared with the ns-CP group and the control group (p < 0.001). Taurodontism was the most prevalent dental phenotype, with 92.73% in the ns-PRS group, 40.91% for ns-CP and 44.55% in the control group. Tooth agenesis had a prevalence of 22.7% for ns-PRS, 4.5% for ns-CP and no case in the control group. For the prevalence of root dilaceration and tooth transposition, no statistically significant differences were observed between the three groups. ConclusionsDue to the high frequency of taurodontism in individuals with ns-PRS, we suggested that this novel phenotype would be important in the phenotypic screening of ns-PRS and could be considered as a phenotype associated with ns-PRS.

The applications of TADs in canine transpositions

Tooth transpositions are relatively rare, and unless x-rays are obtained, they may go unnoticed until teeth begin to erupt. The prevalence, possible etiologies, and clinical considerations for different treatment options are reviewed in various classifications of canine transpositions. A guideline of treatment strategies for canine transpositions is discussed. Although orthodontic correction to restore ideal tooth order is not always possible for canine transpositions, the advent of two new techniques, CBCT and TADs, offers better diagnosis and new treatment options.

Bilateral Transposition Of Maxillary Canines And First Premolars : Orthodontic Management. A Case Report

Introduction: Transposition is a rare dental anomaly in positional interchange between two adjacent teeth. Studies indicated that tooth transpositions are more frequent unilateral than bilateral (12:1). It is a very rare phenomenon when the anomaly is bilateral and affects same teeth on both sides. The case of a 17 year old girl, with class I incisor relationship on class 1 skeletal base with bilateral transposition of maxillary canines-first premolars, severe crowding and posterior crossbite, is presented. This case report demonstrates the orthodontic management of bilateral transposition of maxillary canines-first premolars and by the end of treatment, the transpositions were maintained while achieving a good functional and aesthetic result.

Dental anomalies: prevalence and associations between them in a large sample of non-orthodontic subjects, a cross-sectional study

BackgroundTo analyze the prevalence and associations between dental anomalies detectable on panoramic radiographs in a sample of non-orthodontic growing subjects.MethodsFor this cross-sectional study, digital panoramic radiographs of 5005 subjects were initially screened from a single radiographic center in Rome. Inclusion criteria were: subjects who were aged 8–12 years, Caucasian, and had good diagnostic quality radiographs. Syndromic subjects, those with craniofacial malformation, or orthodontic patients were excluded and this led to a sample of 4706 subjects [mean (SD) age = 9.6 (1.2) years, 2366 males and 2340 females]. Sample was subsequently divided into four subgroups (8, 9, 10, and 11–12 year-old groups). Two operators examined panoramic radiographs to observe the presence of common dental anomalies. The prevalence and associations between dental anomalies were also investigated.ResultsThe overall prevalence of dental anomalies was 20.9%. Approximately, 17.9% showed only one anomaly, 2.7% two anomalies, while only 0.3% had more than two anomalies. The most frequent anomalies were the displacement of maxillary canine (7.5%), hypodontia (7.1%), impacted teeth (3.9%), tooth ankylosis (2.8%), and tooth transposition (1.4%). The lower right second premolar was the most frequent missing teeth; 3.7% had only one tooth agenesis, and 0.08% had six or more missing tooth (Oligodontia). Mesiodens was the most common type of supernumerary tooth (0.66%). Two subjects had taurodontic tooth (0.04%). Tooth transpositions and displacement of maxillary canine were seen in 1.4 and 7.5%, retrospectively (approximately 69 and 58% were in the 8 and 9 year-old groups, retrospectively). Significant associations were detected between the different dental anomalies (P < .05).ConclusionsThe results of our study revealed significant associations among different dental anomalies and provide further evidences to support common etiological factors.

Camouflage treatment of a skeletal class III malocclusion with tooth transposition using a non-surgical approach: case report

Treatment of class III malocclusion in growing subjects is achallenging part of contemporary orthodontic practice. Many treatment approaches can be found in the literature regarding orthopedic, orthodontic treatment or even surgery for class III malocclusions. We present a case report of a 12-year-old male patient, skeletal class III who was treated with Edge-Wise appliances. Treatment was successful with the need of neither extractions nor surgery. There was a tooth transposition of a premolar and maxillary canine. We usedintermaxillary elastics to correct the anterior crossbite. The objective of this clinical case is to demonstrate the importance of knowledge in the management of the patient at appropriate ages, as well as of the apparatology and auxiliaries in orthodontics for each particular case.Favorable results were obtained, obtaining bilateral class I molar and canine, as well as complete uncrossing of the anterior bite assisted with dental camouflage.

Clinician's Corner Tooth Transposition : The Clinical Features and Management : A Case Report

Clinician's Corner Tooth Transposition : The Clinical Features and Management : A Case Report

Orthodontic Treatment of Unilateral Impacted Complete Transposed Maxillary Canine and Impacted Dilacerated Maxillary central incisor

Aims: The purpose of this article was to present a case of surgical exposure and orthodontic reposition of impacted dilacerated maxillary left central incisor. Also surgical exposure of impacted maxillary left canine followed by orthodontic treatment of canine-lateral incisor complete transposition. result : this article describe the treatment of a teenager girl who had impactions of the maxillary left central incisor and canine as well as canine-lateral incisor transposition. The dilacerated impacted central incisor was uncovered and orthodonticaly extruded into the dental arch. Then the impacted canine was surgically exposed and orthodonticaly moving the tooth palately then distally to brought it into its normal position. Conclusion : concurrent impaction and transposition of maxillary anterior teeth is uncommon and poses a challenge for the dentist. Early diagnosis and management of eruption disturbances give us both esthetic and functional outcome benefits.

Second premolar agenesis as a subclinical phenotype of isolated cleft palate.

To compare the prevalence of dental anomalies in patients with isolated cleft palate with or without hypodontia of the second premolar. A total of 653 patients with isolated cleft palate aged 8-12 years were divided into two groups: G1-subjects without hypodontia of second premolar (n = 546) and G2-subjects with hypodontia of at least one-second premolar (n = 107). The control group consisted of 107 non-cleft orthodontic patients. Panoramic and periapical radiographs and dental casts were used to analyze the presence of dental anomalies. Intergroup comparisons were performed using the chi-square test complemented by Proportion test and Bonferroni test. G2 presented higher prevalence of hypodontia of other permanent teeth compared to G1 and control. Ectopic eruption of the maxillary canine and tooth transposition were more frequent in patients with a cleft compared to patients without a cleft, without statistical differences. Deciduous molar infra-occlusion and second premolar disto-angulation were less prevalent in G1 and G2 compared to the control group. G2 showed a higher prevalence of complete cleft palate than G1. Patients with cleft palate and second premolar agenesis showed increased prevalence of tooth agenesis and palatally displaced canines.

Transposition revisited: New classification and notation system

Introduction: Dental transposition is a rare and severe anomaly of eruptive position with varied expression. Previously, tooth transpositions have been classified according to the teeth and jaw involved, or by designating specific terms to the different types of transposition (e.g., complete/incomplete, true/false, partial, simple, coronal, and pseudotransposition). However, there is no comprehensive classification-notation system for transposition in literature that systematically discriminates the condition and presents utmost facts for the same. Materials and Methods: To know all the possible types of tooth transposition, literature was searched in PubMed and Medline library, with the keyword “tooth transposition.” A total of 494 articles were obtained. These articles were read, and all possible types of transposition were noted. The obtained data were analyzed systematically and comparatively to design a new classification-notation system. Result and Conclusion: This classification-notation system is outlined to avoid confusion, to ease communication, and to provide a better understanding of the prevailing anomaly. It is easy to remember and convey maximum information. Further, to make it easy for computer archiving, some abbreviations and symbols are added to this classification-notation system.

Taurodontism, Root Dilaceration, and Tooth Transposition: A Radiographic Study of a Population With Nonsyndromic Cleft Lip and/or Palate.

In an effort to contribute to proper dental planning and define possible dental phenotypes of nonsyndromic cleft lip and/or palate (CL/P), this study aimed to investigate the occurrence of taurodontism, root dilaceration, and tooth transposition in persons with nonsyndromic CL/P, specifically analyzing the differences among gender, cleft types, and the most affected teeth. This retrospective study analyzed 974 panoramic x-rays from nonsyndromic Brazilians older than 16 years and categorized into the following four groups: group 1, 250 persons with unilateral cleft lip and palate; group 2, 250 persons with unilateral cleft lip; group 3, 224 persons with cleft palate; and a control group of 250 persons without clefts. Radiographs were digitalized with a scanner and analyzed. In the Brazilian population studied, the prevalence of taurodontism was 60.4% in group 1, 62.4% in group 2, 67.0% in group 3, and 42.8% in the control group. Root dilacerations had a prevalence of 31.2% in group 1, 29.6% in group 2, 26.3% in group 3, and 27.2% in the control group. The teeth most affected by taurodontism were 17 and 27; whereas root dilacerations were most common in teeth 38 and 48. No tooth transpositions were found in any radiograph analyzed. Taurodontism is significantly more prevalent in Brazilians with nonsyndromic CL/P than in persons without clefts; whereas the prevalence of root dilaceration no different from that in the control group. However, root dilacerations in anterior teeth were increased in groups 1 and 2 when compared to the control group.

Prevalence of oro-dental anomalies among schoolchildren in Sana'a city, Yemen

Practitioners and policy-makers need information about the relative frequency of dental anomalies among children in their region. This study investigated the prevalence of different oral anomalies among schoolchildren in Sana'a city, Yemen. A sample of 1000 private and public schoolchildren aged 4-12 years were examined by the same examiner using disposable tongue blades. The total prevalence of oral anomalies was 15.1%, most commonly in boys (male:female ratio 3.2:1) aged 7-12 years. The most prevalent dental anomaly related to hard tissues was tooth hypoplasia (2.8%), followed by hypocalcification (2.6%), then microdontia (0.5%), macrodontia (0.4%), hypodontia (0.4%), supernumerary teeth (0.3%), tooth transposition (0.3%), dental fusion (0.2%) and gemination (0.2%). The most prevalent soft tissues anomaly was fissured tongue (4.0%), followed by ankyloglossia (1.8%), geographic tongue (0.9%), macroglossia (0.4%) and hairy tongue (0.3%). Appropriate measures need to be taken early to mitigate the negative impact and later costs of treatment of anomalies.

Ectopic eruption: Management of a partial mandibular lateral incisor transposition in a case report

Introduction: tooth transposition is a rare condition especially in the mandibular arch. Management of this condition is so hard, complicated and unknown for most of the clinicians. Case report: In this report we describe a case of orthodontic management of a partial mandibular left lateral incisor and canine transposition. We used a modified lingual arch appliance for initial correction of tooth transposition, more detailing was achieved by fix treatment. Discussion: Early detection of this anomaly is very important. Providing panoramic radiography to assess the developing dentition during the age of 6 to 8 years is an apropos forethought.

Evaluation of developmental dental anomalies in digital panoramic radiographs in Southeast Iranian Population.

Objectives:The objective of this study was to evaluate the prevalence of dental developmental anomalies in digital panoramic radiographs of the patients referred to the Zahedan medical imaging center and to evaluate the frequency of anomalies regarding the disorders in shape, position and number in the Southeast of Iran.Materials and Methods:A total of 1172 panoramic radiographs from 581 males and 586 females aged over 16 years were obtained from the files of the Zahedan medical imaging center between the years of 2014 and 2015. The selected radiographs were evaluated in terms of the anomalies such as dilacerations, taurodontism, supernumerary teeth, congenitally missing teeth, fusion, gemination, tooth impaction, tooth transposition, dens invagination, and peg lateral. Then, the anomalies were compared to each other regarding the frequency of the anomaly type (morphological, positional and numerical). Data were evaluated using descriptive statistics such as frequency and percent, and statistical tests such as X2 at 0.05 significant level using the Statistical Package for the Social Sciences version 16.5.Results:The prevalence of dental anomaly was 213 (18.17%), which was higher in females (9.90) than male, (8.28), however, this difference was not statistically significant (P > 0.05). The prevalence of dilacerated teeth was 62 (5.29%), taurodontism 63 (5.38%), supernumerary teeth 6 (0.51%), congenitally missing teeth 13 (1.11%), fusion 1 (0.09%), gemination 1 (0.09%), impaction 40 (3.41%), transposition 2 (0.18%), dens invagination 16 (1.37) and peg lateral was 9 (0.77%). The prevalence of morphological anomaly was 152 (71.36%), malposition 42 (19.72%) and numerous anomaly was 19 (8.92%).Conclusions:Dental anomalies are relatively common; although their occurrence is not symptomatic, they can lead to several clinical problems in patients. Detailed clinical and radiographic assessment and counseling during patient visits is a critical factor in assessing the patient's degree of difficulty to help the dentist for better preparedness for the treatment.

Spec Rekindled-A Simple Torque Correction Mechanics for Transposed Teeth in Conjunction with Pre-adjusted Edgewise Appliance System.

Complete transposition of teeth is a rather rare phenomenon. After correction of transposed and malaligned lateral incisor and canine, attainment of appropriate individual antagonistic tooth torque is indispensable, which many orthodontists consider to be a herculean task. Here, a novel method is proposed which demonstrates the use of Spec reverse torquing auxillary as an effective adjunctive aid in conjunction with pre-adjusted edgewise brackets.