Dentition Stage Research Articles

Effects of Gender and Age in Mandibular Leeway Space for Taiwanese Children.

Purpose: Leeway space is clinically crucial in pediatric dentistry because it is utilized to resolve tooth crowding and allow the first molars to drift mesially to establish a Class I molar relationship in the later stages of mixed dentition. This study investigated leeway space in the mixed dentition of Taiwanese children of different sexes and ages. Materials and Methods: The digital panoramic dental films of 182 lower arches of 119 boys and 63 girls aged 5–10 years were analyzed in this retrospective study. The mesiodistal crown widths of the primary canines and first and second molars and the permanent canines and first and second premolars were measured using medical imaging software. Differences in leeway space were statistically analyzed. Results: The average leeway space was 1.29 ± 1.48 mm on each side of the lower arch. The leeway space of children aged 5–6 years was significantly greater than that of children aged 7–8 years. No gender difference in crown width was discovered, except with regard to the primary first molar. Although no gender difference in leeway space was observed, permanent teeth affected leeway space more for girls than for boys. Conclusion: In Taiwanese children, although leeway space does not differ by sex, age affects leeway space. However, permanent tooth size has an influence on the leeway space of girls.

Seven-year follow-up of a patient with hereditary gingival fibromatosis treated with a multidisciplinary approach: case report

BackgroundHereditary gingival fibromatosis (HGF) is rare in clinical practice, and the long-term results of the combined orthodontic-periodontal treatment of HGF are rarely reported.Case presentationThis study reports for the first time the results of seven years of follow-up in a seven-year-old girl with HGF. The diagnosis was confirmed by clinical signs, family history and histopathological examination. First, periodontal scaling and oral hygiene reinforcement were performed regularly in the mixed dentition stage. Next, gingivoplasty was performed on the permanent dentition. Two months after the surgery, treatment with fixed orthodontic appliances was conducted. The teeth were polished on a monthly basis, and oral hygiene was reinforced to control gingival enlargement. Gingival hypertrophy recurred slightly, and gingivectomies were performed in the months following the start of orthodontic treatment. Follow-up was performed for 24 months with orthodontic retention, and gingival enlargement remained stable after the combined treatment.ConclusionsThe risk of gingival hyperplasia recurrence during and after orthodontic treatment is high, but satisfying long-term outcomes can be achieved with gingivectomy, malocclusion correction, and regular follow-up maintenance.

Prevalência de mordida aberta anterior em escolares de Porto Alegre

It was studied the open bite prevalence at four different steps of human dentition by epidemiological research in the school population in Porto Alegre. The open bite prevalence was bigger in the temporary dentition (38,11%) than in permanent or mixed dentition. ln the young permanent dentition the prevalence was 8,09% and 4,35% in the permanent one. It was verified by comparative study of the four evolution stages of human dentition, the great reduction of open bite prevalence from temporary to permanent dentition.

Orthodontic treatment need and occlusal traits in the early mixed dentition among 8-9-year old Saudi children.

The present study aimed to assess the prevalence of occlusal traits and to evaluate the orthodontic treatment need among children aged 8-9 years in Al Ahsa, Eastern region of Saudi Arabia. A descriptive cross-sectional study was conducted among 282 Saudi children who were randomly selected from those visiting dental outpatient clinics at the College of dentistry in King Faisal University, AlAhsa. All the children were evaluated using the DHC and AC components of Index of Orthodontic Treatment Need (IOTN). Descriptive statistics, chisquare test and Fisher's Exact test were used for data analysis with statistical significance set at p< 0.05. The most prevalent malocclusal trait was crowding (39.7%) followed by increased overjet (28.4%). About 30.9% and 17% of the children were in definite need for orthodontic treatment according to DHC and AC of IOTN, respectively. There was no statistical difference in the distribution of DHC (p=0.116) and AC (p=0.177) scores between the gender. This study demonstrated high percentage of malocclusal traits and orthodontic treatment need in the mixed dentition period among 8-9-year-old children in the Eastern region. Emphasis should be placed on early orthodontic screening and treatment in the mixed dentition stage of dental development.

Maxillary Inter-canine Width at Three Stages of Dentition– A Cross-Sectional Study

Objective: To determine the palatal intercanine width from deciduous dentition to permanent dentition in5years to 16 years old children.Materials and Methods: the study sample comprised of 168 children who fulfilled the inclusion andexclusion criteria were examined. Study models were constructed and maxillary intercanine width wasmeasured using Vernier digital caliper.Results: Statistically significant difference was found in upper intercanine width (UICW) between malesand females in primary dentition (p&lt;0.034). Statistically non-significant difference was found in upperintercanine width (UICW) in mixed and permanent dentition. Data were analysed using SPSS 22 (SPSSInc., Chicago, IL, USA). One-way ANOVA followed by Tukey’s post hoc test and t- test were applied toverify the existence of significant differences between the groups.Conclusion: The present study found that there is significant increase in intercanine width in upper dentalarch from primary dentition to permanent dentition.

QS2: The Underreporting Of Traumatic Brain Injuries In Pediatric Craniomaxillofacial Trauma - A 20 Year Retrospective Cohort Study

Purpose:Despite clinical concerns associated with traumatic brain injuries (TBIs), they remain grossly underreported: 46% of TBIs in adult craniomaxillofacial (CMF) trauma patients remained unrecorded at discharge. This has not been studied in the pediatric CMF trauma population. Consequently, this is the first retrospective study to characterize concomitant pediatric TBI and CMF trauma patients, including incidence, presentation, documentation, and outcomes. The authors hypothesize that TBI in pediatric CMF trauma is associated with worse prognosis and remains under-recorded.Methods:An IRB-approved retrospective cohort study was performed to identify all pediatric patients presenting with CMF fractures at a high volume, tertiary trauma center between January 1st, 1990 to December 31st, 2010. Patients were included if they were (1) age younger than 15 years and (2) confirmed presence of CMF injury by means of imaging, radiology report, and physical examination. Patient charts were reviewed for demographic information, dentition stage, CMF fracture patterns, mechanism of injury, presentation, need for operative management, length of stay, and mortality at 2 years. Charts were reviewed to identify concomitant TBIs, defined as intracranial injury, cerebral hemorrhage, brain concussion, epilepsy or seizures (post-traumatic), and traumatic brain injury (documented). Data was analyzed using two-tailed Student’s t-tests and chi square analysis. Point-biserial correlation coefficients were calculated between a continuous and dichotomous variable; Pearson correlation coefficients were calculated between continuous variables. A P value ≤ 0.05 was considered statistically significant.Results:Of the 2966 pediatric CMF trauma patients identified and included for analysis (mean age of 7 +/- 4.7 years old, predominantly white, 59.8%, and male, 64.0%), 809 had concomitant TBI (frequency of 27.3%). Only 13 of the 809 TBI cases were documented in charts (1.6%). Concomitant TBI with CMF trauma patients were more likely to be male (69.1% vs 62%, P < 0.05), and be caused by blunt injury (98.9% vs. 95.5%, P < 0.05), compared to CMF trauma patients without TBI. TBI patients had a higher mortality rate at two years (8.0% vs 4.8%, P < 0.05). Mortality at two years, length of stay in hospital, and time to follow up significantly increased from mild to severe TBIs. Concomitant TBI and CMF trauma patients were also more likely to present with skull & upper third fractures than CMF trauma without TBI (81.8% vs 61.1%, P < 0.05).Conclusion:In this 20-year retrospective review, concomitant TBI injuries were present in a significant number of pediatric CMF trauma cases (27.3%) but was not documented for most cases. Given the importance of initial management and long-term care in TBI patients, it is critical for clinicians to remain vigilant for and manage TBIs in pediatric CMF trauma patients in collaboration with appropriate neurology and/or neurosurgery teams. Future prospective studies are necessary to better characterize TBI patient injury patterns and outcomes to generate practice guiding recommendations for this patient population.

Association between sugary drinks consumption and dental caries incidence among Taiwanese schoolchildren with mixed dentition.

Dental caries is a multifactorial disease, and a sugary diet can generate an acidic plaque environment that advances its development. However, the specific effect of sugary drinks on the subsequent oral health of schoolchildren with mixed dentition is unclear. In this study, we investigated the association between the consumption of sugary drinks and 1year incidence rate of caries in permanent teeth among Taiwanese schoolchildren with mixed dentition. A longitudinal 1year follow-up study was conducted among Taiwanese schoolchildren aged 8-9years. A questionnaire collected information regarding the parents' oral health status and their children's demographic background, oral health-related behaviours and consumption habits of sugary drinks, including handmade drinks (specifically bubble tea and pearl milk tea) and carbonated drinks. Dental caries was recorded through standardized oral examinations. The number of dental services received was retrieved from the Taiwan National Health Insurance Research Database. Multivariate Cox proportional hazards models and zero-inflated negative binomial models were used to estimate the association between the consumption of sugary drinks and the incidence rate of caries in permanent teeth after 1year. The study involved 494 children. During the 1year follow-up period, 117 children developed new dental caries in their permanent teeth, yielding a caries incidence rate of 0.183 per person-year. After adjustments for confounding factors, children who preferred having sugar-rich beverages were associated with having a 4.3 times higher (95% confidence interval [CI]=1.2-15.7) risk of developing caries than did those who preferred nonsugary drinks (P<.05). Additionally, children who often consumed handmade drinks were associated with having a 1.7 times higher (95% CI=1.1-2.9) risk of developing caries than those who seldom consumed (P<.05). The findings suggest that the consumption of sugary drinks during the mixed dentition stage might be a major etiological factor for caries in permanent teeth. These findings could be valuable to paediatricians, dentists, nutritionists and policymakers.

The association of inadequate lip coverage and malocclusion with dental trauma in Brazilian children and adolescents - A systematic review and meta-analysis.

Dental trauma (DT) occurs frequently in children and adolescents. Therefore, understanding the factors associated with its occurrence in these age groups is important to establish specific preventive measures. The aim of this study was to investigate the relationships of lip coverage, overjet, and open bite to dental trauma in Brazilian children and adolescents. The review protocol was registered in the PROSPERO database (CRD42020156290) and the bibliographic search was performed in nine electronic databases until July 2020. The studies included were observational, performed in Brazil, with healthy children and adolescents (0-19years old), and without the restriction of date or language. Two reviewers assessed the individual risk of bias of the eligible studies with a standardized checklist. The meta-analyses were stratified by dentition stage and age range using fixed or random effects, odds ratio (OR) as the effect measure, and 95% confidence interval. The heterogeneity across studies was assessed with the I² test and the GRADE approach assessed the certainty of evidence. The search presented 2493 initial results, from which 55 met the eligibility criteria and were included. Most studies (67%) presented a low risk of bias and were published between 2000 and 2019. Children and adolescents with inadequate lip coverage are 1.86-2.36 times more likely to suffer from DT, while those with increased overjet are 1.94-3.11 times more likely. Children with primary dentitions and anterior open bites are 1.76 (95% CI: 1.20-2.59) times more likely to suffer from DT. The certainty of evidence varied from very low to moderate. Inadequate lip coverage, increased overjet, and anterior open bite are associated with the occurrence of dental trauma in Brazilian children and adolescents.

Eruption pattern of the maxillary canines: features of natural eruption seen in PTG at the late mixed stage\u2014Part I

AimTo describe the variation of eruption pattern of maxillary canines in the late mixed stage of dentition seen in PTG when eruption was later natural.MethodsMaterial for this longitudinal and retrospective register-based study consisted of 1454 PTGs of children living in Eastern Finland (mean age 9.3 years, SD 0.6). Natural eruption of a canine consisted of 744 PTGs (336 girls and 408 boys) including 1488 maxillary canines. The variables examined were treatment/natural eruption, overlapping, inclination, dental age, developmental stage of the canine and lateral incisor.ResultsOnly 2.0% of maxillary canines had clear overlapping and 56.2% no overlapping was detected at the age of 8.5–10.5 years. Large inclination angle (≥ 25°) was found for 5.5% of examined canines. Overlapping of canine with lateral incisor root decreased as the development of canine root exceeded 1/3. Larger inclinations occurred at earlier stages but decreased significantly as the root developed from 1/3 to 1/2. Mean inclination was significantly larger at children with normal dental age and/or incomplete lateral incisors when overlapping occurred. Regardless overlapping mean inclination was larger if dental age was delayed and/or lateral incisors incomplete.ConclusionSome overlapping and larger inclination in maxillary canine are features of normal eruption pattern at an earlier stage of canine development and while lateral incisor is incomplete in PTG (8.5–10.5 years). In addition to the overlapping and inclination, stages of canine and lateral incisor root as well as dental age should be observed radiologically when evaluating erupting maxillary canine in children of this age.

Pediatric Mandibular Distraction Osteogenesis and Long-Term Dental Morbidity: A Clinical Evaluation and Review of the Literature

Objectives: Pediatric mandibular distraction osteogenesis (MDO) is an increasingly common surgical procedure used to lengthen the mandible. Little is known about the long-term effects of MDO on dental development. This retrospective study sought to identify dental abnormalities at mixed dentition and early permanent dentition stages in patients who had undergone MDO. Methods: All pediatric patients who underwent MDO with imaging and clinical exams at mixed dentition and early permanent dentition stages were evaluated identify pathology. Data included demographic information, medical and surgical history, complications, and dental exam information. Descriptive statistics were reported. Results: Twenty-two hemimandibles at mixed dentition stage and 24 at early permanent stage were included. Mean age at initial MDO was 7.95 years with a mean follow-up time of 15.1 years. Nine patients required more than 1 distraction. At the mixed dentition stage, all patients showed abnormalities. The most common abnormalities were absent, dysplastic, or ectopic molars. At early permanent dentition stage, 87.5% of patients had dental abnormalities. The most common abnormality was missing molars (third, second, and first), but dysplastic, impacted, and ectopic teeth were also noted. At both mixed and early permanent dentition stages, some patients were noted to have abnormal V-shaped sigmoid notching of the mandibular ramus of undetermined clinical significance. Buccal mucosal scarring that interfered with orthodontic treatment was observed in a subset of patients. Conclusions: This study provides long-term dental analyses of patients undergoing MDO for mandibular hypoplasia. Dental abnormalities were seen at both mixed and early permanent dentition stages. Molars were the most commonly affected with absence the most commonly seen abnormality. Dysplastic, ectopic, and impacted teeth were also seen in posterior and anterior dentition, and abnormalities in buccal soft tissue and the mandibular ramus were also seen. MDO remains a crucial tool for functional and aesthetic improvement in children with hypoplastic mandibles. Dental abnormalities as a consequence of MDO should be considered as part of surgical planning process.

Alveolar bone grafting and gingivoperiosteoplasty in bilateral cleft lip and palate.

Gingivoperiosteoplasty (GPP) and alveolar bone grafting (ABG) procedures have a vast history. There have been many publications regarding ABG and secondary ABG, with and without presurgical infant orthopedics (PSIO), in bilateral cleft lip and palate patients. There is little long-term data available describing results of both techniques. The interdisciplinary approach to primary and secondary surgical procedures has proven to be beneficial for patients with bilateral cleft lip and palate. In the neonates, naso-alveolar molding (NAM) has been found to optimize the aesthetic outcome as well as re-approximating the arches to facilitate GPP. During the mixed dentition stage, arch preparation/expansion before the secondary ABG procedure improves arch morphology, restores the functional interarch relationship, and facilitates surgery. This review aims to highlight the key points of both the procedures and why combining both procedures along with PSIO procedures such as NAM might be helpful for the patients in the long term.

Evaluation of Growth and Development of Adolescents' Dental Arch Asymmetry with Normal Occlusion Using Three-Dimensional Digital Models.

Objective The purpose of this study was to observe the dental arch asymmetry in 12-year-olds with normal occlusion during the early permanent dentition stage. Methods Ninety-two 12-year-old students (46 males and 46 females) who had normal occlusion during early permanent dentition were selected from a junior high school in Tangshan, China. Once per year for three consecutive years, a dental cast was obtained from each subject, and the cast was scanned with a 3D digital scanner (R700 3D). The median palatal plane (MPP) and transverse palatal plane (TPP) were used as the reference plane for the transverse and anteroposterior measurements, respectively. Results Most of the dental arch asymmetry indicators decreased with age, but these differences were not statistically significant. The values of the midincisal edge of the upper central incisors (U1), midincisal edge of the upper lateral incisors (U2), upper canine cusp tip (U3), upper first premolar buccal cusp tip (U4), upper second premolar buccal cusp tip (U5), upper first molar mesiobuccal cusp tip (U6MB), and upper first molar distobuccal cusp tip (U6DB) to the TPP were 0.019 mm, 0.279 mm, 0.017 mm, 0.016 mm, 0.016 mm, 0.027 mm, and 0.200 mm, respectively; these values were larger in males than in females (P < 0.05). The values of 2–5, 6MB, and 6DB-TPP were 0.154 mm, 0.102 mm, 0.119 mm, 0.259 mm, 0.206 mm, and 0.123 mm, respectively, larger in the mandibular than in the maxillary dental arch (P < 0.05). The values of the midincisal edge of the lower central incisors (L1), midincisal edge of the lower lateral incisors (L2), lower canine cusp tip (L3), lower first premolar buccal cusp tip (L4), lower second premolar buccal cusp tip (L5), lower first molar mesiobuccal cusp tip (L6MB), and lower first molar distobuccal cusp tip (L6DB) to the MPP were 0.399 mm, 0.197 mm, 0.258 mm, 0.248 mm, 0.214 mm, 0.575 mm, and 0.531 mm, respectively, larger than L1-5, L6MB, and L6DB-TPP (P < 0.05). Conclusion The asymmetry of the dental arch in 12-to-15-year-olds with normal occlusion did not change significantly with age. The anteroposterior asymmetry of the maxillary dental arch is larger in males than in females. With the exception of the central incisor, the anteroposterior asymmetry of the mandibular dental arch is larger than that of the maxillary dental arch. The transverse asymmetry of the mandibular dental arch is larger than the anteroposterior asymmetry.

THEEFFICIENCY OF ORTHODONTIC TREATMENT OF CLASSII MALOCCLUSION IN CHILDREN WITH β -THALASSEMIA MAJO

Aims: Evaluation of the effectiveness of orthodontic treatment of Class II malocclusion with the Twin-block appliance in children withβ-thalassemia major. Methods: The study was conducted with 49 patients with Class II malocclusion aged 10-14 years. The control group included 23 healthy patients. The main group included 26 patients with β-thalassemia major. Patients had received orthodontic treatment with a Twin-block appliance. The duration of orthodontic treatment was 1.5–2 years. Results: In both groups, a statistically significant increase in the SNB angle was observed. Subsequently, the ANB angle was normalized. The effective length of the maxilla growing and mandibular length increasing was observed. Overjet distance is decreased due to favorable torque changes. Pretreatment assessment revealed that overbite was smaller in children with β-thalassemia major. As the effect of orthodontic treatment, statistically, significant changes were observed on both overjet and overbite distances (p &lt;0.001). Conclusions: Orthodontic treatment of β-thalassemia major of patients with Twin-block appliance in mixed dentition stage is effective in improving inter arch relationships and the orofacial functions.

Examining the Relationship between Social and School Environment and Children’s Caries Experience Using Primary and Secondary Data: A Cluster Analysis

Dental caries is still prevalent worldwide, even with advances in preventive and curative measures. The aim was to examine clustering patterns of socioeconomic and environmental characteristics of schools and their associations with caries experience of schoolchildren. An epidemiological survey with cross-sectional design was conducted in 2014/2015 and included 5,213 students (aged 2–11 years) from 38 public schools of Carapicuíba (SP, Brazil). Primary data consisted of dental examinations performed at schools by 6 calibrated examiners to evaluate caries experience (dmf/DMFT index). Secondary data were extracted from the last official Demographic Census (2010) and School Census (2014 and 2015) to assess the socioeconomic and environmental characteristics of the territorial units and infrastructure of each school, respectively. Cluster analysis and ANOVA were applied to identify schools with similar social and environmental aspects and children’s caries experience. A logistic regression model was used to ascertain the effects of cluster variables on the likelihood that participants have caries experience, controlling for the stage of dentition and sex. Two valid and reliable clusters were identified: cluster 1 (“advantaged group”), characterized by 33 schools with the highest percentages of children without caries experience and located in regions with better socioenvironmental indicators, and cluster 2 (“least advantaged group”), characterized by 5 schools with higher percentages of children with caries experience, lower percentages of households with sanitary sewer and water supply, higher residents/household ratio and higher percentages of families living with up to 1 minimum wage. An increase in the odds of having caries experience for each percent of houses with well water and families which live with up to 1 minimum wage was observed. By using primary and secondary data, the study draws attention to the relationship between socioeconomic and environmental indicators and caries experience, identifying least advantaged regions and helping to design strategic health plans for this target population.

Maxillary arch development with Invisalign system.

To evaluate tooth movements during maxillary arch expansion with clear aligner treatment. The study group included 28 subjects (16 females, 12 males, mean age 31.9 ± 5.4 years) collected prospectively from January 2018 to May 2019. Inclusion criteria were European ancestry, posterior transverse discrepancy of 3-6 mm, permanent dentition stage, presence of second permanent molars, mild or moderate crowding, and good compliance with aligners. Treatment protocol included nonextraction strategies, application of Invisalign clear aligner system, and no auxiliaries other than Invisalign attachments. Linear and angular measurements were performed before treatment (T1), at the end of treatment (T2), and on final virtual models (T2 ClinCheck). A paired t-test was used to compare T2-T1 and T2-T2 ClinCheck changes. The level of significance was set at 5%. Statistically significant differences were found for all measurements, except for ones at the upper second molars. The greatest increase in maxillary width was detected at the upper first and second premolars: +3.5 mm for the first premolar and +3.8 mm for the second premolar at T2. Comparison of T2-T1 angular outcomes showed statistically significant changes in the inclinations of all teeth except for the second permanent molars. T2-T2 ClinCheck showed significant differences for both linear and angular measurements for maxillary canines, resulting in poor predictability. Maxillary arch development revealed a progressive reduction of the expansion rate and buccal tipping in the anterior, lateral, and posterior regions, with the greatest net increase at the first and second premolars. Clinical attention should be paid to maxillary canine movements, and overcorrection should be planned for them during dentoalveolar expansion.

Results of orthodontic treatment of a child with asymmetrical micrognathia and the congenital mandibular condylar hyperplasia

Aim. To analyze the results of orthodontic treatment of a child with asymmetrical micrognathia and mandiblar condylar hyperplasia.&#x0D; Methods. The configuration of a face in the photos was evaluated and diagnostic models of the jaws were analyzed by using the Ponts and Korkhaus methods in treatment dynamics. The physiological status of bone tissue, temporomandibular joints and teeth was studied by using orthopantomography and computed tomography. Functional disorders were detected by using special tests, including EschlerBittner's test and Ilyina-Markosyans test. Orthodontic treatment and stimulation of mandibular growth in the mixed dentition stage were undertaken with the single jaw removable appliances and the appliance improved by us for correction of the distal occlusion. The Damon Q bracket system with archwires was used in permanent dentition period.&#x0D; Results. The child's convex facial profile was typical for distal occlusion and micrognathia. The facial asymmetry, increasing with mouth opening, and a decrease in mandibular range of motion indicated lesion of the right temporomandibular joint. The right condyle was enlarged on the orthopantomogram. The computed tomography showed that it was asymmetrically enlarged and had a cellular structure. There was detected asymmetric micrognathia. The comprehensive rehabilitation plan included orthodontic treatment, myotherapy, speech therapy, mechanotherapy. The use of removable orthodontic appliances led to the normal size of the dentition and their relation, significantly reduced functional disorders and improved facial aesthetics. Five years after completion of orthodontic treatment, the physiological occlusion and amplitude of the mandibular movements remained, but the right mandibular angle was flattened.&#x0D; Conclusion. The comprehensive rehabilitation of a child with asymmetrical micrognathia and mandibular condylar hyperplasia started in mixed dentition stage provided conditions for the formation of normal permanent dentition and the improvement of functional disorders and facial aesthetics; our results allow us to suggest the positive effect of our tactics for treatment of the patient.

Prevalensi Persistensi Gigi Sulung Pada Anak Usia 6-12 Tahun : Kajian pada Rekam Medik di RSGM FKG USAKTI (Penelitian)

Background: Tooth growth and development disturbances often occur in children. One such disorder is persistent primary teeth. This condition occurs in children aged 6 to 12 y.o, during mixed dentition stage. Persistent primary teeth is a condition when primary teeth is retained beyond the time of normal exfoliation, which can later induce teeth crowding. Objective: To determine the prevalence of persistent primary teeth in children aged 6 to 12 y.o at RSGM FKG Usakti. Method: This type of research is an observational descriptive study with a cross-sectional design. Sampels were obtained with consecutive sampling method. Sample used in this study was 215 medical records of patients aged 6 to 12 y.o at RSGM FKG Usakti during the period 1 May 2018 to 1 May 2019. Results: The results showed total of 215 samples consists of 50 (23.26%) with persistent primary teeth and 165 (76.74%) without persistent primary teeth. Persistent mostly occurs in girls aged 7 y.o (26%). Persistent primary teeth is most common in one tooth (52%) in the anterior region (57.4%) both in the maxilla (50%) and mandible (50%). Persistent primary teeth are most commonly found in maxillary central incisors (43.48%). Conclusion: The prevalence of persistent primary teeth in children aged 6 to 12 y.o at RSGM FKG Usakti was 23.26%.

Management of anterior open-bite in the deciduous, mixed and permanent dentition stage: a descriptive review.

Anterior open bite is one of the most complex malocclusions to manage. The interaction of skeletal, dental, and soft tissue effects can contribute to develop an anterior open bite. The skeletal open bite requires a more complex approach of treatment to reach function, aesthetics, and stability. The approaches vary depending on the causative factors and the age of patients. Treatment approaches for open bite patients differ when dealing with adults and growing patients. The aim of this descriptive review was to summarize the main existing treatment strategies for anterior open bite, from the noninvasive behavioural shaping to the orthodontic intrusion with skeletal anchorage.

Ortodoncia interceptiva durante la pandemia COVID-19: Urgencias y tratamientos prioritarios

A la presente fecha, los diferentes organismos de salud internacionales y locales han publicado recomendaciones, regulaciones y protocolos para atención odontológica durante de la pandemia COVID-19, ajustados a las diferentes etapas de la misma. La Asociación Latinoamericana de Odontopediatría, en su misión apoyar y llevar la mejor información disponible a todos los colegas latinos, ha publicado guías prácticas y documentos de apoyo fáciles de utilizar y compartir con todo el personal odontológico que trabaje en ambiente hospitalario, clínicas gubernamentales, instituciones educativas y clínicas privadas, que presten atención a niños, adolescentes y pacientes en situación de discapacidad.1-3 Diferentes países se encuentran en diferentes etapas de la pandemia por lo que las recomendaciones pueden incluir limitar el tratamiento odontológico a los casos de urgencia o con necesidad de tratamiento prioritario. Esto puede implicar la suspensión temporal de los controles periódicos de ortodoncia interceptiva. El objetivo de esta revisión es proporcionar directrices en el manejo de la atención de pacientes con tratamiento de ortodoncia interceptiva el periodo de Pandemia por COVID-19, utilizando la literatura disponible y la opinión de los expertos. Son muchos los pacientes pediátricos que utilizan aparatos o que necesitan terapia a corto plazo, situaciones que requieren de planificación de tratamiento según la etapa de la pandemia en la cual se encuentre cada localidad. Aunque los procedimientos de ortodoncia generalmente se consideran optativos, hay situaciones en cuales son prioritarios. Siendo así en este documento se busca definir el término de urgencias ortodóncicas durante el confinamiento COVID-19, determinando cuáles situaciones pueden ser manejadas en el hogar a través de la teleodontología y cuáles requieren la asistencia personal a la consulta odontológica. Igualmente, busca describir las maloclusiones que requieren tratamiento prioritario luego del confinamiento COVID-19, realizando algunas recomendaciones terapéuticas basadas en diferentes niveles de evidencia, para la etapa de dentición primaria o mixta temprana. Las recomendaciones que a continuación se proponen están vinculadas a la situación excepcional de pandemia y pueden diferir de las prácticas clínicas habituales. No constituyen un protocolo clínico exhaustivo de todos los tratamientos posibles, sino una guía de orientación, sin sustituir regulaciones locales, protocolos específicos, ni leyes vigentes en cada país y son susceptibles a evolucionar y cambiar en función de la situación sanitaria. Se insta a los profesionales a realizar seguimiento a las actualizaciones que puede haber sobre este documento.

Oral Health, Caries Risk Profiles, and Oral Microbiome of Pediatric Patients with Leukemia Submitted to Chemotherapy.

Background Chemotherapy is the primary treatment modality used for patients with acute lymphoblastic leukemia (ALL), but inevitably causes microbiota-related oral complications. This study is aimed at investigating the effects of chemotherapy on oral health status, caries risk, and oral microbiome in pediatric patients with ALL. Methods Thirty-nine children with ALL receiving chemotherapy were enrolled, and a gender-, age-, dentition stage, and socioeconomic class matched healthy counterpart were recruited. Demographic information and overall health condition were obtained through the questionnaire and medical records. Oral examination was performed to assess caries and salivary status, plaque index, and other oral manifestations. Cariogram was used to assess the overall caries risk. Supragingival samples of thirteen ALL subjects and their counterparts were randomly selected to perform a 16S ribosomal RNA gene 454 pyrosequencing. Raw sequence data were screened, trimmed, and filtered using Seqcln and MOTHUR. Results The prevalence of dental caries, gingivitis, oral mucositis, xerostomia, and candidiasis in ALL groups was higher than that of the control group (p < 0.05). Children with ALL demonstrated higher caries risk compared to healthy controls (HC) based upon Cariogram (p < 0.05). The oral microbial structure of ALL patients receiving chemotherapy is different from that of healthy controls. Oral microbiota of ALL groups showed less alpha diversity and significant differences in the composition of the oral microbiome compared to healthy controls. Conclusions ALL patients receiving chemotherapy demonstrated compromised oral health, high caries risk, alteration of caries-related factors, and dysbiosis of oral microbiota. These findings may be of clinical importance in developing better strategies for personalized preventive management of oral diseases for pediatric children with ALL.