Successor Permanent Teeth Research Articles

Prevalence and local causes for retention of primary teeth and the associated delayed permanent tooth eruption.

This study aimed to evaluate the prevalence of retained primary teeth (RPT) associated with delayed permanent tooth eruption and the factors associated with this condition in German children. This is across-sectional retrospective study that evaluated panoramic radiographs from orthodontic patients. The diagnosis of RPT was established according to Nolla developmental stage. The primary tooth was considered retained when its successor permanent tooth was in Nolla stage8, 9, or10. Statistical analysis was performed with an α of 5% (p < 0.05). Atotal of 102children (48girls and 54boys), and 574 primary teeth and their respective permanent successor teeth were evaluated. We classified 192 teeth as RPT. Sixty-one (59.8%) children presented one or more RPT. Gender was not significantly different between RPT and control teeth (p = 0.838; odds ratio 0.95, confidence interval 95% 0.44-2.16). In the majority of the RPT cases (68.7%), no clear cause to explain the prolonged retention was identified. The pathological problems most commonly observed with RPT were dental fillings (19.3%), followed by dental caries (4.6%), and ectopic tooth eruption (2.1%). The incidence of RPT associated with delayed permanent tooth eruption in German children was high and the most common pathological condition associated with RPT was dental caries.

Impacted Deciduous Second Mandibular Molar Tooth

A 9-years-old boy presented to the Department of Oral and Maxillofacial Surgery with pain in the posterior region of the left mandible. The child was healthy with an unremarkable medical history. There was no family history of the same condition. Intra-oral clinical examination showed the absence of lower left deciduous molar and multiple carious deciduous teeth at both dental arches. Orthopantogram (OPG) confirmed the complete impaction of the lower-left deciduous 2nd molar with inferior retention of the lower 2nd permanent premolar close to the lower border of the mandible [Panel A]. Under local anesthesia, a two-sided flap was raised, surgical removal of the impacted deciduous 2nd molar and extraction of adjacent 1st deciduous molar, the flap was sutured with 3/0 silk suture [Panel B and C]. Failure of eruption or impaction of deciduous molar was linked to the disturbance of the development of the successor's permanent teeth. Deciduous tooth failure of eruption or impaction is rare in comparison with permanent teeth. Among deciduous dentitions, the 2nd molar was the most commonly affected tooth, followed by central incisors. Impaction can cause many serious problems to underlying tooth buds of the permanent dentition including their delayed eruption or even ectopic eruption. Therefore, proper history and clinical examination, and precise treatment are mandatory. After one month, OPG showed complete healing [Panel D] and the patient was satisfied with the aesthetic and functional outcomes.

Single Nucleotide Polymorphisms in COX2 Is Associated with Persistent Primary Tooth and Delayed Permanent Tooth Eruption.

Persistent primary tooth (PPT) is a prevalent clinical condition that occurs when a primary tooth is over-retained beyond the established period of its normal exfoliation time, remaining in the oral cavity. Many factors could be involved in the risk of PPT; therefore, the aim of this study was to evaluate if single nucleotide polymorphisms (SNPs) in the COX2 gene are associated with PPT. Children undergoing orthodontic treatment were screened. Orthopantomographs were assessed to evaluate PPT according to the Nolla stage of its permanent successor. The primary tooth was considered retained when its successor permanent tooth was in Nolla stage 8 and below the alveolar crypt, Nolla stage 9, or Nolla stage 10. A saliva sample from each child was collected and used for DNA extraction. A real-time PCR of two SNPs, rs689466 (−1195 G/A) and rs5275 (+665 T/C), was performed. A chi-square test was used to compare the allele and genotype distribution. Haplotype analysis was also performed. A total of 100 children were included in the study. Fifty-one had at least one PPT, while 49 children were classified as a control. The number of teeth persistent in the oral cavity ranged from 1 to 8. The genotype distribution was associated with PPT in the co-dominant model (p = 0.006) for SNP rs5275. The individuals that carry two T alleles (TT) compared with the individuals that carry at least one C allele (C + TC) had an almost three times higher chance of presenting with PPT (p = 0.012; OR = 2.99, CI95% 1.28 to 6.95–recessive model). The haplotype C-A for the SNPs rs5275 and rs689466, respectively, was significantly associated (p = 0.042). In conclusion, single nucleotide polymorphisms in the gene encoding for COX2 are associated with persistent primary tooth and may delay permanent tooth eruption.

Utilização dos mantenedores e recuperadores de espaço na ortodontia interceptativa: Revisão dos conceitos atuais

A dentição decídua é fundamental para que ocorra um bom desempenho nas funções mastigatórias, deglutição, fonação e oclusão. Existem vários fatores que podem interferir no equilíbrio do desenvolvimento da dentição decídua e/ou mista, dentre esses fatores destacam-se a perda prematura dos decíduos. O objetivo desse estudo foi realizar uma revisão de literatura abordando a utilização de mantenedores e recuperadores de espaço na odontologia. De acordo com a literatura foi observado que os mantenedores de espaço são dispositivos ortodônticos utilizados a fim de substituírem um ou mais dentes decíduos, preservando o espaço destinado ao dente permanente sucessor. Eles são classificados em, funcionais e não funcionais e fixos e removíveis, sendo selecionados de acordo com a idade do paciente e número de dentes perdidos. Já os recuperadores são dispositivos ortodônticos dinâmicos, e a sua finalidade é recuperar espaços que foram perdidos após a exodontia dos dentes decíduos. É fundamental que o cirurgião-dentista realize um diagnóstico precoce dos problemas decorrentes do espaço nas dentições decíduas ou mistas, conhecendo os fatores etiológicos envolvidos na perda prematura, bem como, as opções de tratamento ortodôntico disponíveis.

Maternal Behavior of Child Malocclusion Dental Treatment in Gayungan Health Center Surabaya

Context: based on Gayungan Health Center Surabaya’s patient visit data obtained from April-June 2018 primary teeth persistence is the most common dental case, with percentage 42.6% in April, 20.8% in May and 48.6% in June. The most common cause of primary teeth persistence is the absence of successor permanent teeth. It has connection with the physiological process of primary tooth shed and change to permanent teeth, which occurs to the school-age children, and requires more attention from parents to take care of their children’s dental health. Aims: To determine the effect of maternal behavior and sociodemographic factors on child malocclusion dental treatment in area of Gayungan Health Center Surabaya. Methods and Material: This research is an analytic-observational study. Using instruments in the form of questionnaire that developed from the Theory of Planned Behavior. Results: poor maternal knowledge of dental health may results to not to bring the child to get malocclusion treatment. Results: poor maternal knowledge of dental health may results to not to bring the child to get malocclusion treatment Conclusions: perceived control of orthodontic treatment history (perceived control that characterized by history of orthodontic treatment?), maternal’s level of knowledge, usage of health insurance, and maternal’s perceptions of the child’s dental condition have the opportunity to influence the maternal behavior to make dental visit to get malocclusion treatment.

Clinical and radiographic analysis of traumatized primary teeth and permanent successors: Longitudinal study

Dental trauma can determine the occurrence of sequelae in the deciduous tooth and due to the anatomical proximity to the germ of the successor permanent tooth, it frequently causes changes to the developing teeth. The objective of this study was to analyze clinically and radiographically traumatized primary teeth and permanent successors in children aged 0-8 years. Initially, a sample selection of medical records was made, designating the patients who fit the requirements; 247 patients were analyzed, totaling 379 traumatized primary teeth and 162 successive permanent teeth. The results were developed using the Proportion Test and the Chi-square test at the 5% significance level. Injuries to hard tissue prevailed (57%), with emphasis on coronary enamel fracture (49.1%). After clinical and radiographic examinations, 78% of traumatized primary teeth maintained pulpal vitality. At the clinical evaluation, the frequency of the developmental disorders observed in permanent successors was 10.5%, with enamel hypocalcification being the most common sequela. 17.3% of the clinical changes in the successor permanent teeth were caused by trauma to the supporting tissue, with the intrusive dislocation being responsible for the largest number of damages (37.5%). Based on the results found, it was concluded that the trauma occurring in the primary dentition were recorded and monitored more precisely and about the evaluated successive permanent teeth, except for the prevalence of sequelae found, the other factors are in agreement with the findings in the literature.

The effect of pulp inflammation and premature extraction of primary molars on the successor permanent teeth. A retrospective study

BackgroundUntreated caries on primary molars often leads to pulp inflammation and extraction.AimTo retrospectively investigate the effect of pulp inflammation and extraction of primary molars on their successors regarding alignment in the dental arch and developmental enamel defects (DED).DesignThe participants in this study were children at public schools in Petropolis (Brazil), who participated in a 3‐year longitudinal clinical trial. Children (N = 44) were selected for the present study if they had at least one erupted premolar of which the predecessor primary molar presented pulp inflammation at baseline or during any of the 6‐month follow‐up assessments. All premolars were examined for DED and misalignment. Distinction was made between extraction performed before (E <8) or after the age of 8 years (E ≥8). Distinction was also made between pulp inflammation occurred before (P < 7) or after the age of 7 years (P ≥ 7). A logistic regression analysis was performed, and the odds ratio was calculated.Results and conclusionsMisalignment occurred more frequently in E <8 as compared to E ≥8 (OR = 2.85; P = .03). There was no significant difference in DED between P < 7 and P ≥ 7.ConclusionMisalignment of premolars occurs more frequently when the predecessor primary molars are extracted before the age of 8 years.

The Hall Technique 10 years on: its effect and influence.

Dental caries in early childhood can have a very significant effect not only on the oral health of young children but on their quality of life and that of their families. Added to this are the long-term infective risks to the host of untreated caries in primary teeth but also the risk of damage to successor permanent teeth. Traditional restoration of damaged primary teeth has been shown to have only moderate outcomes depending on the techniques and materials used and the ability of children to cooperate because of age or other factors. The Hall technique has outperformed other techniques in randomised clinical trials. In this Opinion Article I will take a look back at the Innes et al. paper, first published in this Journal in 2006, that introduced the Hall Technique and the subsequent scientific literature which provided us with high quality scientific evidence of the efficacy of the technique. I will evaluate how this new technique has affected the management of early childhood caries and hence its influence on wider oral and general health.

Dental Anomalies in Permanent Teeth after Trauma in Primary Dentition.

This retrospective study aims to evaluate the prevalence of dental anomalies in permanent teeth as a result of a trauma concerning the predecessor primary teeth. A total of 241 records of children (118 males and 123 females, mean age 3.62 &plusmn; 1.40) affected by trauma on primary teeth were analyzed. All patients were recalled to evaluate the status of the permanent successor teeth by clinical and radiographic investigations. Out of 241 patients, 106 patients (for a total of 179 traumatized primary teeth) presented at the recall. Dental anomalies on successor permanent teeth were detected in 21 patients (19.8%), for a total of 26 teeth (14.5%) and 28 anomalies. Anomalies of the eruptive process were the most observed disturbances (60.7%), followed by enamel hypoplasia (25%) and white spots (14.3%). A higher percentage of anomalies on permanent teeth was observed when trauma occurred at an age less than 36 months (38.5% of cases). Intrusive and extrusive luxation were related with the most cases of clinical disturbances in the successor permanent teeth. The results of this study highlight the risk of dental anomalies after a trauma in primary dentition, especially in early-aged children and in case of intrusive luxation.

Endodontic treatment of chronically infected primary teeth using triple antibiotic paste: An in vivo study.

Aim:Maintenance of primary dentition is imperative for the development of arch form, esthetics, function, mastication, and normal eruption of permanent teeth. Premature loss can cause various problems such as ectopic eruption, space loss for the successor permanent teeth, alterations in speech, and impairment of function. Hence, decayed primary teeth should not be extracted and treated whenever possible. Pulpectomy is generally recommended as a treatment of choice in such cases. The purpose of this study was to evaluate the clinical and radiographic success of pulpectomized primary teeth with chronic infection using a mixture of metronidazole, ciprofloxacin, and minocycline (3MIX)-MP as an intracanal medicament before the obturation.Methodology:Sixty primary teeth were selected, which were randomly divided into two groups (Group A and Group B) with thirty teeth in each group. In Group A, 3MIX-MP was used as intracanal medicament whereas in Group B, conventional pulpectomy was performed. Resolution of clinical signs and symptoms were evaluated within 2 weeks after the treatment and at recalled 3rd, 6th, and 12th month intervals. The treated teeth were evaluated clinically and radiographically.Results:High success rate was observed in Group A samples both clinically and radiographically. Although the difference in clinical success was not statistically significant, the difference in radiographic success was statistically significant.Conclusion:All the primary teeth with chronic infection which were treated using 3MIX-MP, followed by the instrumentation and obturation provided excellent clinical and radiographic success when compared to conventional pulpectomy and noninstrumentational lesion sterilization tissue repair therapy.

Effects on permanent teeth after luxation injuries to the primary predecessors: a study in children assisted at an emergency service

The purpose of this study is to evaluate the developmental disturbances in permanent teeth as a result of luxation injuries in the primary teeth predecessors. A total of 5330 records, corresponding to 10 years attendance at the Emergency Center of Baby Clinic, Londrina State University, Brazil, were analyzed. Three hundred and eighty nine children were involved in this study, totaling 620 traumatized primary teeth. Clinical and radiographic examinations were carried out in the permanent successor teeth. In total, 623 permanent teeth were examined and developmental disturbances were detected in 126 teeth (20.2%). The white or yellow-brown discoloration of enamel was the clinical disturbance most observed (78.0%) and the crown alteration most detected through radiographic analysis was hypoplasia (86.0%). Root alterations were rare; root dilaceration was observed in only one case. The age of the children when their primary teeth received damage varied between 6 and 36 months (P = 0.000325). Intrusive luxation and avulsion were related with most of the cases of sequelae in the successor permanent teeth (P = 0.000001). The results of the present investigation emphasize the special attention required for children who suffered dental trauma at an early age, especially in cases of intrusive luxation and avulsion.

Traumatic intrusion of primary tooth: follow up until eruption of permanent successor tooth

This paper presents a clinical case of a 2(1/2)-year-old boy who suffered dental trauma because of a fall from a bike. His father thought that the boy's central upper left incisor had been fractured. The clinical exam showed laceration of the upper maxillary frenum and a possible intrusion of the tooth, as the area was swollen. An upper maxillary occlusal X-ray confirmed the intrusion of the incisor. The procedure adopted was to wait for the re-eruption of the tooth. It was recommended that the boy stop using a pacifier and feeding bottle. The necessity of keeping the affected area clean was also emphasized. The patient was observed and, within 6 months, the central upper left incisor was found in occlusion. The successor permanent tooth was normal after 6 years.

Endodontic treatment of primary teeth using a combination of antibacterial drugs.

To evaluate the clinical outcome of 'Lesion Sterilization and Tissue Repair' (LSTR) therapy for endodontic treatment of primary teeth. A mixture of metronidazole, ciprofloxacin, and minocycline (3Mix) in ointment (macrogol mixed with propylene glycol: MP) or in a root canal sealer was used to disinfect infected root canals of 56 patients aged 4-18 years. Out of a total of 87 primary teeth, 81 cases had physiologic root resorption. A total of 54 radiolucent periradicular lesions were present. The root canals were not prepared before or after disinfection. 3Mix medicament (3Mix-MP/3Mix-sealer) was placed at orifices of root canals or on the bottom of pulp chambers, and then sealed with glass-ionomer cement and further reinforced by a composite resin inlay prepared using a direct method and cemented with resin. In all cases, clinical symptoms such as gingival swelling (52 cases), sinus tracts (22 cases), induced dull pain (3 cases), spontaneous dull pain (26 cases), and pain on biting (46 cases) disappeared after treatment, although in four cases clinical signs and symptoms were finally resolved only after retreatment using the same procedures. Thus, gingival abscesses and fistulae, if present, disappeared after a few days. Successor permanent teeth erupted without any disorders, or were found radiographically to be normal and in the process of eruption. All the cases were evaluated as successful. The mean function time of the primary teeth was 680 days (range: 68-2390 days), except for one case in which the successor permanent tooth was congenitally missing. Primary teeth with periradicular lesions with or without physiologic root resorption were treated successfully by the LSTR endodontic therapy.