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At least 217 records · Page 12Linked to original sources
PubMed2000

Retention of permanent incisors by mesiodens: a family affair.

The term mesiodens refers to a supernumerary tooth that is present in the midline of the maxilla between the two central incisors. One or two mesiodentes may be present. We present a rare case of two sisters, in both of whom a pair of mesiodentes caused the retention of permanent incisors. They were referred to our hospital with asymptomatic delayed eruption of upper incisors. This article is written to point out genetic factors as the possible origin of supernumerary teeth.

Adolescent↗
PubMed1989

[Variations of dentition in raccoon dogs (Nyctereutes Procynoides Viverrinus T.) Anomalies in number of the teeth].

A study on the number of anomalous teeth was made by using gross and radiographic examinations on 179 skulls (male: 68, female: 53, unknown: 58) of raccoon dogs (Nyctereutes Procynoides Viverrinus T.) captured in the northern part of Kyushu. Results were as follows: 1. 8 skulls had 15 supernumerary teeth. They were in the upper incisor, the upper third premolar and the upper and lower first premolar regions. 2. 35 skulls had 58 congenitally missing teeth. Most of them were upper and lower first premolars or lower third molars. 3. One skull had one supernumerary tooth in the upper second incisor region and one congenitally missing tooth, a lower third molar. 4. The anomalous teeth were about 25%, the supernumerary teeth and congenitally missing teeth were about 4.5% and 20% respectively.

Animals↗
PubMed2000

A retrospective study of unerupted maxillary incisors associated with supernumerary teeth.

We retrospectively reviewed the clinical records and radiographs of 100 patients who had had supernumerary teeth removed. Their mean (SD) age was 9 years 3 months (2). The 100 patients had a total of 127 unerupted maxillary incisors associated with supernumerary teeth. The supernumerary tooth was removed without exposure of the permanent tooth more often among the 79 younger children (aged 10 years or less) (SND=3.52, P<0.01), and when the incisors were less mature (Cvek classification 1, 2, and 3) (SND=5.27, P<0.01). Of these incisors with immature roots that were treated conservatively, 60 (72%) erupted and 24 (28%) required further operation. Of the mature incisors treated conservatively, 10 (63%) required further operation. In this study, almost three-quarters of immature incisors erupted spontaneously after removal of the associated supernumerary teeth. Over half of the mature teeth required further operation. Mature teeth should be exposed with or without bonding at the time of removal of the supernumerary teeth.

Adolescent↗
PubMed1999

Uncommon mesiodens--a report of two cases.

Mesiodens is a supernumerary tooth with a cone shaped crown and a short root situated between the maxillary central incisors. Supernumerary teeth occur as isolated dental findings or as part of a syndrome. They are frequently discovered when a normal tooth is either delayed in its eruption or displaced often resulting in arch length inadequacy. An early diagnosis allows early intervention, more favourable prognosis and minimal complications. Presented here are two cases of unusual bilateral mesiodens.

Adolescent↗
PubMed1997

Hemisection and vital treatment of a fused tooth--literature review and case report.

Fusion and gemination of permanent teeth are developmental anomalies of the dental hard tissues which may require endodontic and surgical treatment for functional, orthodontic or aesthetic reasons. Following a review of the dental literature on tooth fusion and gemination, a case of fusion of a maxillary central incisor and a supernumerary tooth and its endodontic and surgical treatment is presented.

Child↗
PubMed2003

Supernumerary teeth "mesiodens". Case report.

The supernumerary tooth is an anomaly of dental eruption that is not rare to find in the clinical practice. Among the supernumerary teeth the "mesiodens" is most frequent. The mesiodens is found in the region of the superior central incisors and it can be the cause of many complications. The aim of this work is the description of a rare symptomatic case of mesiodens and the diagnostic and therapeutic strategies to adopt when this dental anomaly occurs. In particular the authors suggest making radiographic examinations only in the family of patients with dental anomalies of number, thinking that the incidence of such anomalies is too low to justify mass radiographic examinations.

Child↗
PubMedDate not supplied

Reshaping a mesiodens.

A mesiodens is a supernumerary tooth that is found in the midline of the maxilla. Fifteen percent erupt usually between the ages of 3 and 7. The standard treatment is extraction of the supernumerary to allow the permanent incisors to erupt properly. This case report describes an instance where the primary incisor was prematurely exfoliated due to the eruption of the mesiodens. Because of the favorable position of the mesiodens in the dental arch, it was decided to reshape the supernumerary to resemble a primary incisor. This was accomplished successfully, and the mesiodens is being monitored to assess any need to trim or add to the bonding material as the child grows.

Child, Preschool↗
PubMed1981

Eruption of impacted permanent upper incisors after removal of of supernumerary teeth.

In a retrospective study of 63 patients, an attempt is made to determine in how many cases retained permanent upper incisors erupt after the removal of supernumerary teeth, and what predisposing and etiological factors are of importance. It proved that the eruption of a supernumerary tooth positively contributed to the chance of a spontaneous eruption of the permanent incisors. No relationship could be demonstrated between the age of a patient from whom supernumeraries were extracted, the number of supernumeraries, the extent of root formation, marked apical displacement and the chance of spontaneous eruption of the permanent incisors. It also proved that only in 1 out of 2 children did spontaneous eruption occur after removal of the supernumeraries. It therefore seems advisable to provide all impacted upper incisors with a cervical ligature of bracket with twined wire sling during the first operation in order to create the possibility for orthodontic traction if spontaneous eruption of the incisor does not occur, and thus to prevent a second operation for the child.

Adolescent↗
PubMed1984

Treatment of triple tooth: report of case.

A case of a young girl with a triple primary tooth that retarded normal development of the maxillary left lateral incisor is described. The primary tooth was extracted to encourage normal development of the permanent tooth. Subsequent examination of the extracted triple tooth suggests that it was composed of the primary left lateral incisor fused either to a geminated central incisor or to a fused central incisor and supernumerary tooth.

Child↗
PubMed1998

Mesiodens in the primary dentition--a case report.

Supernumerary teeth are among the most significant dental anomalies affecting the primary and the permanent dentitions. Mesiodens is a supernumerary tooth with a cone shaped crown and a short root. Though it occurs frequently in the permanent dentition, it is extremely rare in the primary dentition. The exact etiology is still obscure and not well understood. Supernumerary teeth occur as isolated dental findings or as part of a syndrome. The frequency with which supernumerary teeth occur and the effects they have on development of normal occlusion justify the radiographic examination of preschool children. Early removal of such teeth is recommended if they impede the eruption of adjacent permanent teeth, appear inverted or rudimentary, associated with certain pathologic conditions or are symptomatic.

Child, Preschool↗
PubMed1999

Multiple supernumerary teeth in the mixed dentition.

Supernumerary or extra teeth result from disturbances during the initiation and proliferation stages of dental development. Teeth formed in excess of the normal number are termed supernumerary teeth. A supernumerary tooth may closely resemble the teeth of the group to which it belongs i.e. molars, premolars or anterior teeth or it may bear little resemblance in size or shape to the teeth with which it is associated. Discussed here are reports of three cases with multiple supernumerary teeth in the mixed dentition and its management.

Child↗
PubMed1979

[A case contribution to the Gardner syndrome].

As to its course the Gardner syndrome is similar to a chronic disease and has the following symptoms: 1. Fibro-epithelial tumours of the skin with first symptoms in early childhood. 2. Osteomes, osteofibromas, desmoids mainly located in the cranial region. 3. Disturbances of the dental development in the form of tooth retentions, persistence of milk teeth and supernumerary tooth germs. 4. Intra- and retroperitoneal or intramesenteric fibromatoses which scarcely become clinically manifest. 5. Intestinal polyposis occurring in most cases only in the third decade of life. The tumours of the skin, of the connective tissue and of the bone are always benign, whereas the intestinal polypi show a considerable tendency toward malignant degeneration. For this reason, the prognosis of the Gardner syndrome must be considered unfavourable. On the basis of a case report, the clinical symptoms and findings in the maxillofacial region are outlined.

Adult↗
PubMed2006

Eruption of supernumerary permanent teeth in a sample of urban primary school population in Genoa, Italy.

AIM: The aim of this epidemiological study was to describe the incidence and distribution of hyperdontia in the primary school population in Genoa (Italy) and to check its influence on the development of orthodontic problems in children. The collected data should also help to find out what is the best age range among children to direct a program for early diagnosis and prevention of malocclusion and oral diseases related to hyperdontia. METHODS: The participating children (total number 1577, 814 males and 763 females, between 6 and 10 years of age) chosen in 19 public primary schools in Genoa have been examined by the same specialist through year 2004. Erupted permanent teeth, presence, position and form of supernumerary teeth, malocclusion presence and class, presence of orthodontic devices, age and sex have been noted down for each child. RESULTS: The global percentage of hyperdontia was 0.38%, more frequent in males (0.49%) than in females (0.26%). The most common kind of supernumerary tooth was mesiodens (83%). A significant increase of hyperdontia prevalence (from 0.64% to 1.06%) was noticed in children 9 years old. The incidence of malocclusion among children presenting hyperdontia was 83.3%, while the global incidence of malocclusion was 40%. An orthodontic treatment had been planned and started for 20% of children presenting malocclusion. CONCLUSION: The study has revealed an incidence of hyperdontia much more frequent in males than in females (2:1). The most common site of eruption of supernumerary teeth is maxillary anterior region. Hyperdontia is strictly related with dental malocclusion. The best age range to direct a program of early diagnosis and prevention of malocclusion and hyperdontia is 9 years old children.

Child↗
PubMed1996

Survey of anomalies in primary teeth and their correlation with the permanent dentition.

The purpose of the study was to investigate primary and permanent tooth anomalies of 5-year-old children in Taranaki; 1,680 children were examined by school dental therapists, and the presence of hypodontia, hyperdontia, and double teeth recorded. Panoramic radiographs were taken of those children with anomalies of the primary teeth. Anomalies of the primary teeth were detected in 23 children (1.4 percent). Six children (3 boys and 3 girls) had hypodontia, 3 children (2 boys and 1 girl) had a supernumerary tooth, and 14 children (9 boys and 5 girls) had double teeth. Six of the affected teeth (in 4 boys and 2 girls) were diagnosed as fusion, and 8 (5 boys and 3 girls) as gemination. The panoramic radiographs of the 23 children with anomalies of the primary teeth revealed that 14 (60.9 percent) also had anomalies of the succedaneous permanent teeth. Children with hypodontia in the primary dentition all had corresponding permanent teeth missing. In all but three children, only one tooth was involved. Nineteen of the 30 primary teeth (63 percent) and 12 of the 15 permanent teeth (80 percent) affected by hypodontia, gemination, or fusion were lateral incisors. For each type of anomaly, boys were affected more often than girls. The results of the study confirm that, when there is hypodontia, hyperdontia, gemination, or fusion of teeth in the primary dentition, there is an increased likelihood of anomalies of the succedaneous permanent teeth. Because of this close relationship between the dentitions, early identification of anomalies of the primary teeth can allow the dentist to investigate further and plan for treatment at the appropriate time.

Anodontia↗
PubMed1995

Crown dilaceration of permanent incisors following trauma to their primary predecessors.

Crown dilaceration of a permanent tooth constitutes 3% of traumatic injuries to developing teeth. It usually involves the maxillary incisors and less frequently their mandibular counterparts. This report concerns a patient, whose primary mandibular central incisors, following a fall at the age of 14 months, sustained partial avulsion with displacement. The teeth were repositioned by the father, with the aid of a pediatrician, and without the assistance of a dentist. The patient presented at the age of 8 years, and, following clinical and radiographic examination, a diagnosis was made of crown dilaceration with lingual displacement of the incisal third of the permanent mandibular central incisors, and hypoplastic enamel on all but the gingival third of their crowns. In addition to this, a supernumerary tooth was discovered labial to and between the mandibular right permanent central incisor and the mandibular right primary lateral incisor. After a brief review of the literature, the treatment of this patient is described and the restoration of the dilacerated teeth, followed by a discussion on crown dilaceration and issues concerning the restoration of such teeth.

Child↗
PubMed1984

Supernumerary teeth in anthropoid primates and models of tooth development.

Supernumerary teeth are usually regarded as de-novo structures that result from abnormal development by the splitting of a tooth germ. The notions of abnormal and de novo appear to be applicable in only one instance, the morphological dental twin. All other types of supernumerary deciduous teeth can be explained by either a progress zone or an interstitial budding model of tooth differentiation. The development of extra structures as well as the loss of normally-present teeth can be explained by differences in potential within the context of normal development.

Animals↗