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At least 19 recordsLinked to original sources
PubMed1997

Comparison of the pattern of agenesis in the primary and permanent dentitions in a population characterized by agenesis in the primary dentition.

The first aim of this study was to collect a large sample of radiographs from children with congenitally missing teeth (CMT) in the primary dentition and to analyse the local relationship between agenesis of a primary tooth and the presence/absence of its permanent successor. The second aim was to compare, in the same sample, the pattern of agenesis in the primary dentition with the developmental pattern seen in the permanent dentition. 124 dentists from 72 municipalities contributed to the investigation of a total of 213 children. The dentists were asked to lend existing radiographic material from patients with agenesis in the primary dentition. The analysis of the local occurrence of agenesis showed that agenesis of a primary incisor was often but not always followed by agenesis of the succedaneous tooth. In the molar region, agenesis of a primary tooth was in all cases but one followed by agenesis of the succedaneous tooth. Comparison of the pattern of CMT in the primary dentition with the pattern of tooth presence/absence in the permanent dentition in a group of 33 patients, for whom complete radiographic material was available showed that agenesis always occurred in the permanent dentition and that the pattern of agenesis in the permanent dentition differed from that in the primary dentition. Incisors were most frequently missing in the primary dentition and premolars in the permanent dentition. The number of congenitally missing teeth was substantially larger in the permanent dentition that in the primary dentition. Also, permanent teeth that are very rarely congenitally missing were missing in this sample, characterized by the occurrence of agenesis in the primary dentition.

Adolescent↗
PubMed1998

Influence of orthodontic treatment in the primary dentition upon development of the dentition and craniofacial growth.

UNLABELLED: Thirty patients who underwent orthodontic treatment of the primary dentition were examined in this retrospective follow-up study. The mean age at the beginning of treatment was 4.4 (+/= 1.1) years, and at follow-up 15.4 (+/- 1.7) years. Different kinds of malocclusion were present. RESULTS: The early treatment lasted on average 12.3 (+/- 7.2) months. Treatment time of Class III malocclusion and lateral crossbite was significantly shorter than that of Class II, 1 malocclusion, functional Class II, 2 malocclusion or anterior open bite (p < 0.05). A Class I occlusion was achieved in 90% of the patients during treatment of the primary dentition. No patient treated successfully in the primary dentition showed any relapse to initial malocclusion. CONCLUSION: These results suggest that changes in occlusion and mandibular position during treatment in the primary dentition are maintained in the mixed and permanent dentition. It can be concluded that a Class I occlusion following orthodontic treatment in the primary dentition serves as a basis for physiological development of the dentition and craniofacial growth.

Child, Preschool↗
PubMedDate not supplied

Interrelation between fusions in the primary dentition and agenesis in the succedaneous permanent dentition seen from an embryological point of view.

The purpose of the present study was to elucidate the relationship between fusions in the primary dentition and the occurrence of agenesis in the succedaneous permanent dentition in a Danish child population and to elucidate this relationship from the recently described normal embryological development of the anterior parts of the human maxilla and mandible. The material included radiographs, either as intraoral film or as orthopantomograms from a total of 19 primary dentitions with a total of 21 fusions. Radiographs of the permanent dentition in the fusion regions were available for all 19 dentitions. Of 21 fusions, a total of 20 were in the mandible and one in the maxilla. In 15 cases, the fusions were between primary incisors and in six cases between lateral incisors and canines. Agenesis of a permanent lateral incisor always occurred when there had been fusion of a primary lateral incisor and a canine in the primary dentition. When fusion had been between primary incisors, there was only agenesis of an incisor in the permanent dentition in a few cases. The degree of fusion between the involved teeth was not related to the occurrence of agenesis. It is suggested that the intra-jaw differences are related to the recently reported prenatal developmental patterns of the alveoli of the incisors and canines. Moreover, it is suggested that neural crest developmental field differences between the developing maxilla and mandible may explain the inter-jaw differences in phenotypic abnormalities.

Aging↗
PubMed1996

Dental anomalies in the primary dentition: distribution and correlation with the permanent dentition.

The study consisted of analysis of all cases of anomalies in the primary dentition that were seen or treated by the authors in the Department of Children's Dentistry and Orthodontics. A total of 79 occurrences of anomalies was seen in 65 children. The anomalies detected were double teeth, hypodontia and supernumerary teeth. Radiographic examinations of the affected children showed that over 60% of the cases with anomalies in the primary dentition are associated with anomalies of the succadeneous permanent dentition. All subjects with hypodontia of the primary dentition presented with hypodontia of the permanent dentition. However, anomalies of the permanent dentition were seen in 59% of subjects with primary double tooth and 50% of subjects with primary supernumerary tooth.

Anodontia↗
PubMed1991

[The development of dysgnathia from the primary dentition to the mixed dentition].

We investigated the fully developed deciduous dentition in 408 children, and re-examined the situation four years later. The nature of the milk teeth (spaced, unspaced, crowded) has a considerable influence on subsequent development. Orthodontic treatment of the mixed dentition is most likely (76,7%) if there has been crowding of the milk teeth. Frontal crowding, distal occlusion, increased overjet, lateral cross-bite and prognathism of the lower jaw are most frequently retained in the mixed dentition. However, individual development follows this trend to a varying degree. On the basis of the situation in the primary dentition it is not possible to make a definitive prediction of the vertical relationships of the upper and lower front teeth in the permanent dentition.

Child↗
PubMed1975

The effects of variations in the opposing dentition on changes in the partially edentulous mandible. Part III. Tooth mobility and chewing efficiency with various maxillary dentitions.

Tests were conducted using a mobilometer to determine the effects of the opposing dentition on mobility of selected teeth in the partially edentulous mandible. In addition, the effect of the opposing dentition and the presence or absence of a lower removable partial denture on chewing efficiency was evaluated. Results indicated an increase in mobility of abutment teeth following placement of removable partial dentures. The mobility decreased as the teeth became stabilized by the removable partial dentures. The amount of mucosal and bone-contour change was directly related to the degree of mobility of the abutment teeth. Comparisons in chewing efficiency indicated no particular difference between subjects with unilateral or bilateral distal-extension removable partial dentures or in the type of opposing dentition. However, the use of a lower removable partial denture does increase chewing efficiency to a level of about 50 per cent of that found for subjects with all of their natural teeth.

Alveolar Process↗
PubMed1996

Enamel defects in the deciduous dentition as a potential predictor of defects in the permanent dentition of 8- and 9-year-old children in fluoridated Cheshire, England.

It is claimed that dental fluorosis in both deciduous and permanent teeth is increasing in fluoridated and non-fluoridated communities. What is unclear is whether fluoride-induced enamel opacities in the deciduous dentition are associated with the subsequent appearance of enamel defects in the permanent dentition. The aim of this study was to establish whether a relationship existed between the presence of diffuse enamel defects on the deciduous molars and permanent incisors of schoolchildren who were lifetime residents in an optimally fluoridated community in Cheshire, England. The dentitions of eight-and nine-year-old children were examined by two examiners, each unaware of the findings of the other. There was a significant increased risk of diffuse enamel defects in the permanent incisors for those children who presented with diffuse defects on their first deciduous molars (Relative Risk, 1.45; 95% confidence interval, 1.05 to 2.0) or second deciduous molars (Relative Risk, 1.86; 95% confidence interval, 1.36 to 2.54). In light of these findings, it is worth considering the potential of the presence of enamel defects in deciduous molars in children aged 1 to 3 years as a predictor of the future appearance of similar lesions in their permanent incisors.

Case-Control Studies↗
PubMed2001

Localization of first permanent molars in lateral cephalometric and panoramic radiographs from early mixed dentition to early permanent dentition.

Changes in position and mesiodistal angulations of maxillary and mandibular first permanent molars from early mixed dentition to early permanent dentition were measured on panoramic radiographs and compared with the values measured on lateral cephalometric radiographs. It was found that the maxillary and mandibular first permanent molars were uprighted gradually, drifted mesially and vertically, and that the changes in mesiodistal angulations were clearly on the panoramic radiographs in comparison with the cephalometric radiographs.

Analysis of Variance↗
PubMed1990

Caries experience in the deciduous dentition as predictor for caries in the permanent dentition.

The present study aims at determining a reliable screening test for the prediction of caries. In order to identify children at risk of caries, individual classifications were recorded for 268 children at the age of 7 years, according to different screening criteria of the caries experience in the deciduous dentition and according to caries increment as validation criterion. In order to determine the best screening criterion, ratios of sensitivity, specificity and false-positive and false-negative ratios were computed and plotted in receiver operating characteristic curves. The best screening criterion at less than or equal to 4 dmft resulted in a sensitivity ratio of 0.69, specificity of 0.72 and diagnostic power of 0.78 for caries increment in the permanent dentition at the age of 7-11 years. The potential of the screening is elucidated with an example, showing that 48% of the expenses needed for a preventive treatment for all children could be saved by selecting children at risk with the aid of a screening test. The disadvantage of this decision making is that 19% of the children who develop caries would not benefit from the preventive treatment.

Child↗
PubMed2003

Deciduous dentition-anchored rapid maxillary expansion in crossbite and non-crossbite mixed dentition patients: reaction of the permanent first molar.

This preliminary report describes our evaluation of the behavior of permanent maxillary first molars subsequent to rapid maxillary expansion (RME) in the mixed dentition in crossbite and non-crossbite cases; maxillary deciduous canines and second molars were used as anchorage. The RME appliance was cemented on the maxillary deciduous second molars and canines in 19 (13 females, six males) patients with unilateral or bilateral permanent molar crossbites (Group A) and in 13 (10 females, three males) patients who had no crossbites (Group B). After a mean appliance activation period of 15 days for 4-8 mm expansion, the appliance was stabilized and kept in place as retention for 5-10 months. Neither active nor passive retention was applied on first permanent molars. Impressions of dental arches were made before insertion of the appliance (T1), at stabilization (T2), and at debanding (T3). Dental measurements were registered at T1, T2, and T3. In Group A, the mean maxillary permanent intermolar width was 40.6 mm at T1, 46.0 mm at T2, and 46.3 mm at T3. In Group B, 42.4 mm at T1, 46.3 mm at T2, and 45.4 mm at T3. In all subjects, the intermolar width increased during the active phase, and in Group A the crossbite was corrected and the correction was spontaneously stable. In these patients, deciduous teeth could support the heavy forces produced by the RME appliance. The maxillary intermolar distance was spontaneously increased and then maintained with no retention in Group A. The mean spontaneous expansion of permanent maxillary molars was approximately half of the mean expansion of the screw and the anchor deciduous teeth.

Child↗
PubMed2002

Panoramic radiographic findings of the mandibular growth from deciduous dentition to early permanent dentition.

The outlines of mandibular rami, condyles, coronoid process, and corpus in panoramic radiographs of normal children from deciduous to early permanent dentition were traced and digitized. Nine linear and four angular measurements were measured. During the observation period, the lengths for all the linear measurements increased, however, the angles for all the angular measurements decreased. The shape of condyle and gonion significantly correlated with the growth of ramus and corpus.

Analysis of Variance↗
PubMed2001

[Birth weight and state of dentition in children with transitional dentition with regard to oral hygiene].

The aim of the present study was to determine the dependency between the state of dentition and the birth weight of the pupils of the third grade of primary schools in Lublin. The subjects of the examination were 150 aged 9 year and 8 months +/- 3.9 months (76 girls and 74 boys). Clinical and questionnaire tests and a statistical analysis were carried out. The obtained results and literature review seem to allow for the following conclusions: there is a relationship between the sum of dmfs and DMFs indexes and the advancement of the carious process and OHI--S--with increment of birth weight and decrement of OHI--S index the sum of dmfs and DMFs indexes decreased; there was no correlation between disturbances of teeth mineralization and the birth weight.

Birth Weight↗
PubMedDate not supplied

[From the mixed dentition to the permanent dentition: how to manage space while guiding eruption?].

In the mixed dentition, when there is a discrepancy between the bony structures and the teeth, in certain cases, serial extractions are performed in order to guide the eruption of permanent teeth and obtain a correct occlusal function. The treatment consists in the extraction of primary teeth and then of first bicuspids. The choice of the first tooth to be extracted is based upon the position of the crowns of the permanent teeth and their degree of root maturation. Then the first bicuspid is extracted as soon as or prior to its eruption. This interceptive treatment has limited indications which need to be respected in order to preserve the child's future dental health. This treatment is indicated for Class I malocclusions with severe crowding or moderate crowding associated with bi-maxillary protrusion.

Child↗