Development Of Permanent Dentition Research Articles

The prevalence of different types of occlusal relationships based on the type of terminal plane in primary dentition: a study among 3- to 6-year old children in Tbilisi, Georgia.

Background. Primary dentition takes the most important role in the development of permanent dentition. Primary second molars determine the eruption and position of permanent first molars. Early diagnosis and treatment could prevent the establishment of occlusal anomalies and deformities, therefore this study aimed to collect data about the prevalence of malocclusions based on the deciduous second molar terminal planes among the Tbilisi preschoolers.Methods. A total of 396 children aged 3-6 years, with an equal number of male and female subjects, were examined in kindergartens drawn from ten districts of Tbilisi, using the PPS (probability proportional to size) method. The relationship between distal surfaces of primary second molars was evaluated and recorded according to Baume’s classification. The significance level is 0.05 for all statistical tests.Results. Out of investigated preschoolers, 52.7% showed the flush terminal plane, followed by the distal step in 21.2% and mesial step in 26.1% of cases. There were no significant differences in genders. The most prevalent relationship between deciduous second molars was the flush terminal plane, with equal distribution in all age groups. The frequency of distal step decreased with age, more frequently recorded in the 3 to 4 year age group. The mesial step was mostly recorded in 3-4 and 5-6 year groups.Conclusion. The flush terminal plane is the most frequent molar relationship, followed by mesial and distal step. Prevalence of distal mesial step significantly decreased with age, while mesial step relationship showed the tendency to increase. The flush terminal plane showed little change with age.

Developmental Dental Defects in Permanent Teeth Resulting from Trauma in Primary Dentition: A Systematic Review.

The objective was to determine whether trauma in primary dentition causes alterations in the development of permanent dentition. Searches were made in May 2020 using PubMed, MEDLINE, MEDES, Scopus, Lilacs, and Embase. Papers in English, German, and Spanish, without restrictions in the year of publication, were included. The quality of the studies was analyzed using the NOS Scale. The search retrieved 537 references, and seven studies were included for a qualitative analysis. The results showed that trauma to a deciduous tooth can damage the bud of the permanent tooth. Enamel discoloration and/or hypoplasia were the most common sequelae in the permanent teeth after trauma to the primary predecessor. The type and severity of sequelae in the permanent tooth are associated with the development phase of the bud. Children with trauma of their primary teeth should receive checkups until the eruption of the permanent teeth for the early diagnosis and treatment of possible sequelae. Intrusion of the primary tooth was the trauma that caused the most damage and enamel alterations the most frequent sequelae.

The Influence of Manufacturing and Material Quality on Space Maintainers Longevity

Premature loss of temporary teeth, both the lateral and the frontal area can have unfavorable consequences on the development of permanent dentition, the support serving to maintain space for permanent teeth eruption in the dental arches. The aim of the study was assessment of different types of fixed and removable space maintainers in terms of their longevity in the dental arches that were applied as interceptive orthodontic treatment for edentulous space management transiently due to premature loss of deciduous teeth. The study followed the evolution of space maintainers properly applied to clinical cases that required these therapeutic options, and appreciated the success rate and the failure of these devices, important being the time at which the assessments were made. Findings failure rate of applied space maintainers was reported to the main causes that could lead to remove the devices: loss of space maintainers, especially those removable, fracturing both fixed and removable devices, loosening orthodontic rings and of course, taking into account the absence of some subjects at periodic reassessment meetings. The space maintainer was considered a success when it fulfill the main role for which it was applied - transitional management of edentulous space, and then being removed when the permanent succession tooth eruption occurred.

Trainer system appliances in early treatment of malocclusions

Orthodontics is dental specialty focused on preventing and treating morphological and functional irregularities of orofacial system in order to establish adequate function of mastication apparatus, good occlusion and pleasant facial appearance. It has been shown that early treatment of orthodontic anomalies during the period of children?s growth is very important. The purpose of early orthodontic treatment is to eliminate or modify deviant skeletal growth and to stimulate adequate dentoalveolar and skeletal development. As known, the treatment of malocclusions should begin in primary or early mixed dentition, since the status of primary dentition has profound effect on the development of permanent dentition. Functional orthodontic appliances are most commonly used in early orthodontic treatment. The aim of this study was to describe a new prefabricated polyurethane myo-functional appliance clinically proved to be very effective.

Evaluation of spontaneous space closure and development of permanent dentition after extraction of hypomineralized permanent first molars

The aim of this study was to evaluate spontaneous space closure, development of the permanent dentition, and need for orthodontic treatment after extraction of permanent first molars due to severe molar-incisor hypomineralization (MIH). Twenty-seven children aged 5.6-12.7 (median 8.2) years had one to four permanent first molars extracted due to severe MIH. Each case was followed up on individual indications 3.8-8.3 (median 5.7) years after extractions. The eruption of the permanent dentition, and space closure were documented by orthopantomograms, casts, photographs, and/or bitewings. Fifteen children were judged to have a favourable spontaneous development of their permanent dentition without any orthodontic intervention. Seven children were or should be subjected to orthodontic treatment for other reasons registered prior to the extraction. Five children were judged to have a treatment at least caused by the extractions, but three of them abstained because of no subjective treatment need. Extraction of permanent first molars severely affected by MIH is a good treatment alternative. Favourable spontaneous space reduction and development of the permanent dentition positioning can be expected without any intervention in the majority of cases extracted prior to the eruption of the second molar.

Radiographic evaluation of the chronological development of permanent dentition in children infected with HIV

The objective of this study is to determine if there is an association between HIV infection in children and alterations in the chronological development of permanent dentition detectable by radiographic examination. The sample comprised two groups of children: (1) 50 children infected with HIV by vertical transmission and (2) 50 healthy children. The groups were paired according to age, sex, race, and socioeconomic level. After obtaining a panoramic radiograph, the stages of tooth calcification and the frequency of subjects showing alveolar eruption of the first and second mandibular permanent molars were determined. There was no significant difference in stages of tooth calcification and frequency of subjects showing alveolar eruption of the permanent molars between the groups (P > 0.05). Children infected with HIV by the vertical route showed upon radiographic examination stages of tooth calcification and alveolar eruption compatible with normal patterns. There is no association between HIV infection and alterations in the chronological development of the permanent teeth, detectable radiographically, in children infected by vertical transmission.

A Nine-year Follow-up of a Porcelain Laminate Veneer Restoration Applied to an Adolescent with Traumatized Dentition: A Clinical Report

Patients: A 9-year-old Japanese female patient with an unremarkable medical history was initially examined for the chief complaint of slight pain and discomfort in a traumatized maxillary central incisor. Four years after endodontic treatment, the patient complained of dark discoloration of the tooth. Among the treatments/restorations indicated, the patient and her parent consequently selected and approved of a porcelain laminate veneer restoration because of its advantage of minimal tooth reduction. The maxillary diastema was gradually closed after insertion of a porcelain laminate veneer, and 9 years of follow-up have revealed that the prosthodontic treatment successfully restored the tooth.Discussion: Many methods have been introduced as aesthetic solutions to discoloration. Although the patient was satisfied with the prosthodontic approach from a functional as well as an aesthetic point of view, direct composite restorations might be an alternative for younger patients in mixed dentition.Conclusion: The treatment in a growing individual should be carefully planned and performed, considering the development of permanent dentition.