Type Of Dentition Research Articles

Post-COVID-19 Trends in Dental Emergencies: A Two-Year Retrospective Study from Romania

Background/Objectives: Dental emergencies significantly impact public oral health, particularly in the post-COVID-19 context. This study aimed to analyze the patterns of dental emergencies presenting to the Emergency Dental Service in Bihor, Romania, during the years 2022 and 2023, focusing on demographic characteristics and the frequency of diagnoses. Methods: A retrospective analysis of medical records from the Emergency Dental Service at Oradea County Emergency Clinical Hospital was conducted. Inclusion criteria encompassed patients presenting with dental emergencies during the specified period. Data regarding demographics, diagnoses, and living environments were collected and statistically analyzed. Results: A total of 4769 patients were analyzed, with acute pulpitis (39.2%, n = 1869) and acute apical periodontitis (37.5%, n = 1788) identified as the most common diagnoses. The study population included 52.3% males and 47.7% females, with a larger proportion residing in urban areas (58.0%) compared with rural areas (42.0%). Significant age-related patterns were evident: pulpitis was more common among patients aged 10–39 years, trauma was associated with patients aged 0–9 years, and gingival infections were prevalent in the 70–79 age group. Diagnoses also varied by dentition type, with abscesses, caries, trauma, and rhizolysis occurring more frequently in deciduous teeth, while pulpitis and post-extraction alveolitis were predominant in permanent teeth. However, no statistically significant differences were found in diagnosis frequency between genders or between rural and urban patients, indicating equitable access to emergency services across environments. Conclusions: The findings underscore the need for targeted interventions in pediatric populations to address early childhood caries, which remains a significant burden. Enhanced public health strategies and preventive education are essential to mitigate the prevalence of dental emergencies, particularly in the aftermath of the COVID-19 pandemic.

Association of vitamin D receptor gene polymorphisms with caries risk in children: a systematic review and meta-analysis

BackgroundTo investigate the association of vitamin D receptor (VDR) gene polymorphism with caries risk in children(< 18 years).MethodsThe electronic databases PubMed, Cochrane, EMBASE, Web of Science, CNKI, Cqvip, and Wanfang were searched for observational studies on the relationship between VDR single nucleotide polymorphism(SNP) and caries, including cohort, case–control, and cross-sectional studies. Quality assessment of selected studies was conducted using the Newcastle Ottawa scale. Odds ratios (OR) with 95% confidence intervals (CI) values for associations of individual VDR SNP with dental caries were calculated based on four genetic models: allelic, recessive, dominant, and over-dominant.ResultsOf 79 studies considered, 10 (nine case–control and one cross-sectional) were selected for analysis; the studies involved seven VDR SNPs: ApaI(rs7975232),BsmI(rs1544410),FokI(rs2228570),TaqI(rs731236), TaqI/BglI(rs739837), FokI(rs10735810) and Cdx-2(rs11568820). Alleles C and T of FokI(rs10735810) were significantly differently distributed in the caries and caries-free groups (OR = 1.33, 95% CI: 1.30–2.30, P = 0.03), with CC + CT genotypes at this locus associated with greater risk of developing caries than the TT genotype (OR = 1.87, 95%CI: 1.15–3.04, P = 0.01). Further, TT + CC genotype at TaqI(rs731236) was associated with a 1.33-fold higher risk of caries development than the TC genotype (OR = 1.33, 95%CI: 1.06–1.67, P = 0.02). On subgroup analysis, the association between TaqI(rs731236) and caries risk was affected by dentition type, and ethnicity (permanent dentition: OR = 1.48, 95%CI: 1.07–2.03, P = 0.02; Asian: OR = 1.38, 95%CI: 1.02–1.87, P = 0.03;). Genotype distributions at BsmI(rs1544410), TaqI/BglI(rs739837), FokI(rs2228570), and ApaI(rs7975232) did not differ significantly between the caries and caries-free groups.ConclusionsCaries risk could be associated with TaqI(rs731236) and FokI(rs10735810) genotypes, and TaqI(rs731236) may be a risk factor for permanent teeth caries among Asian people.

АНАЛИЗ 3D-ЦЕФАЛОМЕТРИЧЕСКИХ ПАРАМЕТРОВ ЧЕРЕПА И 3D-БИОМЕТРИЧЕСКИХ ПАРАМЕТРОВ ВИРТУАЛЬНЫХ ЦЕЛОСТНЫХ ЗУБНЫХ ДУГ ПРИ ИХ ДИСТАЛЬНОМ СООТНОШЕНИИ ПО ДАННЫМ РАСШИРЕННОЙ КОНУСНО-ЛУЧЕВОЙ КОМПЬЮТЕРНОЙ ТОМОГРАФИИ

Objective. To improve technically the diagnostic analysis of 3D-cephalometric parameters of the skull and 3D-odontometric and 3D-biometric parameters of the complete dentition with distal occlusion during the period of permanent dentition according to extended cone-beam computed tomography. Methodology. 134 patients aged 17–35 years with a “distal occlusion” diagnosis were 3D-cephalometrically and 3D-biometrically examined.The parameters of the tragus width and diagonal of the skull on both sides were studied using virtual dynamic 3D-reformats of the skull. The gnathic skull index was calculated and the mesognathic, dolichognathic and brachygnathic skull types were determined. The width, thickness and height of permanent teeth crowns were measured using virtual dynamic 3D-reformats of diagnostic jaw models. Dental types (normodont, microdont, macrodont) of the complete dentition with distal occlusion were determined and abnormal forms (V-shaped, saddle-shaped, triangular, trapezoid, asymmetric) of dentition were pictured. The arcade index was calculated and gnathic types (mesognathic, dolichgnathic, brachiagnathic) of dentition were determined. Severity of the sagittal occlusal curve of Spee was determined on both sides. Results. Mesognathic and dolichognathic types of skull were diagnosed most often; the brachygnathic type was the least common. The combined dental type was in the lead, followed by the microdont and normodont types, the macrodont type was the least common among the dental types of dentition. Analysis of the abnormal shapes of dentition showed a trapezoidal shape predominance in both jaws. The dolichognathic type was most often to be found smong the gnathic types of dentition on both jaws. When analyzing the severity of sagittal occlusal Spee curves, the sharply concave curve was the leader on both sides. Conclusion. Individual 3D-cephalometric and 3D-biometric parameters obtained from extended cone-beam computed tomography can be used to simplify diagnosis, prognosis and to improve the effectiveness of orthodontic treatment.

Patterns and characteristics of traumatic dental injuries in children – a retrospective study in a dental hospital in Kolkata, India

Introduction and aim. Traumatic dental injuries (TDIs) in children can have aesthetic, functional, and psychological conse quences. This retrospective study aimed to investigate the epidemiology and patterns of TDIs in a hospital-based population. Material and methods. Patient records from the Department of pediatric and Preventive Dentistry in a dental college and hospital in Kolkata, India, were reviewed. A total of 381 patients, aged 1 to 12 years, who presented one or more traumatized an terior teeth between September 2018 and August 2022, were included. Data on age, sex, mechanism of injury, type of trauma, dentition type, and number of affected teeth were collected. The World Health Organization classification system was used to classify the type of dental trauma. Results. Among the study population, there were 235 males (61.7%) and 146 females (38.3%), with a mean age of 7.67±3.87 years. Falls were the most common cause of trauma (52.2%). The maxillary central incisors were the most frequently affected teeth in both primary and permanent dentitions. Conclusion. Falls were the most common cause of trauma and the maxillary central incisors were the most commonly affected teeth in children.

The role of atypical deglutition in children and adolescents with moderate to severe obstructive sleep apnea syndrome.

This cross-sectional study aimed to assess the prevalence of atypical deglutition (tongue thrust) in children diagnosed with moderate to severe obstructive sleep apnea syndrome (OSAS) and to explore its associations, particularly in relation to the type of dentition (mixed or permanent). The study was conducted over a 5 year period at a paediatric hospital in Paris, France. Children aged 6-18 years with moderate to severe OSAS (apnea-hypopnea index ≥5/h) underwent a comprehensive evaluation, including the recording of demographic data, symptoms of snoring and breathing issues, and otolaryngology examination. The swallowing pattern was assessed and orthodontic evaluations were performed. Cephalometric radiography and pharyngometry tests (pharyngeal collapsibility was computed) were conducted. The study found a high prevalence of atypical deglutition in children with mixed 74% [56-87] or permanent 38% [25-51] dentition. In children with mixed dentition and atypical deglutition, the pharyngeal compliance and lower facial dimensions were increased. In children with permanent dentition, atypical deglutition was associated with more severe OSAS and a lower hyoid bone position. Independent of the type of dentition, atypical deglutition was associated with an increase in the apnea-hypopnea index, an increase in the lower facial dimension, increased pharyngeal compliance, and a more caudal hyoid bone position. Atypical deglutition was strongly associated with increased pharyngeal collapsibility, more severe OSAS and altered facial measurements in children. The findings suggest that identifying atypical deglutition in children with OSAS could help to guide a personalised therapeutic approach, including myofunctional therapy.

Prevalence of dental trauma in pediatric patients in Mexico: A retrospective study

Aim: Traumatic dental injuries (TDIs) are a neglected public health problem worldwide. In countries where caries prevalence has declined, TDIs are increasingly recognised as one of the main causes of tooth loss. This study determinated the prevalence of dental trauma in patients admitted to Pediatric Dentistry Clinic from 2016 to 2022. Materials and methods: A 7-year retrospective cross-sectional study was carried out through the analysis of 3,281 dental records of pediatric patients who consulted in the Pediatric Dentistry Specialty of a public university in Zacatecas, Mexico. The prevalence of dental trauma, age, sex, type of dentition, and trauma were analyzed. The statistical analysis was performed with the SPSS V-20 program, using the chi square test (p&lt;0.05). Results: The prevalence of dental trauma was 3.54%, with the 1 to 3-year-old group being the most affected. The male sex had a higher incidence of trauma with 65.76%. The primary dentition was the most affected with 75%. The most frequent trauma was concussion with 20.7%, followed by subluxation with 15.8% and uncomplicated crown fracture with 13.6%. When analyzing gender regarding the type of dental trauma, no statistically significant difference was found (p=0.434), regarding the analysis between the age group and the type of trauma, it was found that 2 and 3 years occurs with high frequency (p=0.0001). Conclusions: The prevalence of dental trauma was low. Younger patients presented more dental trauma than older ones. Males, temporary dentition and the upper central incisors of both dentitions were the most affected. Concussion and subluxation were the most frequent injuries.

Drivers of morphological evolution in the toothed whale jaw

Toothed whales (odontocetes) emit high-frequency underwater sounds (echolocate)-an extreme and unique innovation allowing them to sense their prey and environment. Their highly specialized mandible (lower jaw) allows high-frequency sounds to be transmitted back to the inner ear. Echolocation is evident in the earliest toothed whales, but little research has focused on the evolution of mandibular form regarding this unique adaptation. Here, we use a high-density, three-dimensional geometric morphometric analysis of 100 living and extinct cetacean species spanning their ∼50-million-year evolutionary history. Our analyses demonstrate that most shape variation is found in the relative length of the jaw and the mandibular symphysis. The greatest morphological diversity was obtained during two periods of rapid evolution: the initial evolution of archaeocetes (stem whales) in the early to mid-Eocene as they adapted to an aquatic lifestyle, representing one of the most extreme adaptive transitions known, and later on in the mid-Oligocene odontocetes as they became increasingly specialized for a range of diets facilitated by increasingly refined echolocation. Low disparity in the posterior mandible suggests the shape of the acoustic window, which receives sound, has remained conservative since the advent of directional hearing in the aquatic archaeocetes, even as the earliest odontocetes began to receive sounds from echolocation. Diet, echolocation, feeding method, and dentition type strongly influence mandible shape. Unlike in the toothed whale cranium, we found no significant asymmetry in the mandible. We suggest that a combination of refined echolocation and associated dietary specializations have driven morphology and disparity in the toothed whale mandible.

The Impact of COVID-19 Pandemic on the Pattern and Presentation of Traumatic Dental Injuries in Children in a Tertiary Health Institution.

COVID-19 pandemic brought adaptive changes in lifestyle with possible impact on the incidence of traumatic dental injuries. This study compared the presentation and pattern of traumatic dental injuries in children during the pre-COVID-19 and COVID-19 pandemic periods. This was a retrospective study done using clinical records of children aged 16 years and below who presented at the paediatric dental clinic of the University of Port Harcourt Teaching Hospital. Information such as demographics, aetiology, type of injuries, and dentition type were elicited from the 1284 clinical records from March 2019 to February 2021. Data were analysed and the level of significance was set at P ≤ 0.05. One hundred (7.8%) patients presented with traumatic dental injuries (TDIs; 71 [8.5%] and 29 [6.5%] pre-pandemic [March 2019 to February 2020] and pandemic periods [March 2020 to February 2021], respectively) and their mean age was 7.0 (±4.2) years. The male-to-female ratio before and during the pandemic periods was 1.54:1 and 1.42:1, respectively. The commonest aetiology and type of TDI were falls 82 (82%) and injuries to tooth-supporting structures 45 (45%), respectively. There were no statistically significant differences in sex (P = 0.86), aetiology (P = 0.31), type of TDI (P = 0.16), and dentition affected (P = 0.97) between the pre-pandemic and pandemic periods but the difference in the age groups was significant (P = 0.02). The incidence of TDIs was higher in the pre-pandemic period. The younger age group had more dental injuries than the older ones at both periods. This may be due to difficulty in enforcing restrictions on young children even during COVID-19 restrictions.

Effect of lactoferrin on enamel characteristics of primary and permanent teeth: an in-vitro study

BackgroundLactoferrin, a glycoprotein naturally found in breast milk, is known for its bactericidal and antiviral properties, as well as its capacity to modulate the immune system; therefore, pediatricians routinely recommend it as dietary support. The objective of this study was to determine how lactoferrin oral suspension could affect the enamel surface characteristics of primary and permanent teeth.MethodsThis research was conducted on 40 unidentified extracted teeth, including primary and permanent teeth. Experimental teeth were free of cracks or enamel defects, as confirmed by careful examination using a dental operating microscope. The crowns were bisected into 80 specimens and assorted into two groups based on the type of dentition. Group DM included 40 specimens of second deciduous molars, while Group PM contained 40 samples of first premolars. Each of the DM and PM specimens was subsequently split based on the type of dispersion medium into two subgroups: a control subgroup (artificial saliva) and a test subgroup (lactoferrin suspension). The specimens were immersed in lactoferrin suspension for two minutes, then kept in artificial saliva for the rest of the 24 h for 30 successive days. This is a pioneering study about the effect of orally supplemented lactoferrin on teeth; therefore, we examined enamel hardness, ultra-morphology, and mineral contents.ResultsOur findings indicated a highly significant decrease (p < 0.01) in the microhardness of the lactoferrin subgroup in Group DM (second deciduous molars) and a significant reduction (p < 0.05) in the microhardness of the lactoferrin subgroup in Group PM (premolars). Calcium weight% was not statistically different (p > 0.05) compared with a significant decline (p < 0.05) in phosphorus weight% in lactoferrin subgroups in both DM and PM groups. The enamel surface of lactoferrin subgroups in both DM and PM groups was demineralized and porous, with the enamel of deciduous teeth being more affected by lactoferrin than permanent teeth.ConclusionLactoferrin suspension decreased the microhardness of enamel and both calcium and phosphorus weight percentages. Both dentitions exhibited erosions in the enamel surface, with primary teeth being more affected than the permanent teeth.

Mandibular Cortical Bone Evaluation in a Healthy Paediatric Population.

Changes in mandibular cortical bone have been documented in children with chronic diseases but not in healthy populations. We aimed to qualitatively and quantitatively evaluate the mandibular cortical bone of a healthy paediatric population using dental panoramic radiographs (DPTs). The secondary objective was to assess the effect of dental status on cortical bone. The DPTs of 660 individuals, aged 6-18 years, were evaluated by two blinded examiners. Bone was qualitatively categorized according to the Mandibular Cortical Index (MCI), and its width was calculated using the Mandibular Cortical Width Index (MCW). Differences between gender and age were tested using Fisher's exact and correlation with dental status with the chi-square test. A significant correlation was observed between bone morphology and gender, with girls having more frequent even and sharp endosteal margins than boys, who showed semilunar defects. The degree of erosion increased with age, as did bone thickness. A positive correlation between thickness and type of dentition was recorded, with normal bone predominating in children in the mixed dentition stage. Νο correlation was found between bone morphology or thickness and the factors associated with dental status. Bone quality and quantity vary significantly between different genders and age groups. Dental needs and treatment characteristics did not seem to affect the above parameters.

PREVALENCE OF CARIES AND THE NEED FOR URGENT DENTAL TREATMENT AMONG CHILDREN WITH NEUROLOGICAL IMPAIRMENT IN NORTHEASTERN BULGARIA

Introduction: Oral health is extremely important for the quality of life and well-being. Findings reveal that people with special needs have difficulties in getting dental care, which increases their risk of oral diseases. The recommendations for dental examination are identical for patients with and without neurological impairment. This study aimed to assess the prevalence of caries and overall dental health among children with motor and mental disabilities in Northeastern Bulgaria. Methods: A total of 53 children with neurological impairment under the age of 18 were selected from Varna and Ruse from April to October 2017. Data on age, gender, height, weight, caregiver education level were collected. Information on oral hygiene behavior and diet was gathered as well. The 2013 World Health Organization standards for dental caries were used to assess the oral health status. The data were analyzed with the statistical package Jamovi v.2.2.2.0. Results: Children were divided into two groups – with predominantly motor or mental impairment. Both groups had high rates of caries and need for urgent dental treatment with no significant difference observed. The CPITN correlated positively with motor impairment (Spearman's rho= 0.393; p= 0.043). It was discovered that children with motor impairment had a higher prevalence of malocclusion than children with mental impairment (rho= -0.331; p= 0.016). The number of caries correlated as well with the type of occlusion (Spearman's rho=0.378; p=0.005), the dentition type (rho=0.343; p=0.012) and the age (rho= 0.372; p= 0.006). Conclusion: The study findings indicate that both types of neurological impairments were associated with a high frequency of caries and a significant need for urgent dental care. More frequent dental examination is thought to improve oral health. Nevertheless, more studies are required to substantiate this theory.

Deep learning for sex determination: Analyzing over 200,000 panoramic radiographs.

The objective of this study is to assess the performance of an innovative AI-powered tool for sex determination using panoramic radiographs (PR) and to explore factors affecting the performance of the convolutional neural network (CNN). The study involved 207,946 panoramic dental X-rays and their corresponding reports from 15 clinical centers in São Paulo, Brazil. The PRs were acquired with four different devices, and 58% of the patients were female. Data preprocessing included anonymizing the exams, extracting pertinent information from the reports, such as sex, age, type of dentition, and number of missing teeth, and organizing the data into a PostgreSQL database. Two neural network architectures, a standard CNN and a ResNet, were utilized for sex classification, with both undergoing hyperparameter tuning and cross-validation to ensure optimal performance. The CNN model achieved 95.02% accuracy in sex estimation, with image resolution being a significant influencing factor. The ResNet model attained over 86% accuracy in subjects older than 6 years and over 96% in those over 16 years. The algorithm performed better on female images, and the area under the curve (AUC) exceeded 96% for most age groups, except the youngest. Accuracy values were also assessed for different dentition types (deciduous, mixed, and permanent) and missing teeth. This study demonstrates the effectiveness of an AI-driven tool for sex determination using PR and emphasizes the role of image resolution, age, and sex in determining the algorithm's performance.

Reported prevalence of dental caries in Mexican children and teenagers

Dental caries is a serious multifactorial oral disease that causes demineralization of the tooth's hard tissues and affects more than half of the world's population. The objective of this exploratory systematic review was to determine the prevalence of dental caries in Mexican children and adolescents, as well as related factors such as sex, nutritional status, type of dentition, education, living conditions, socioeconomic level, and the type of demographic area. The eligibility criteria to be considered were observational studies whose sample included Mexicans 0-15 years of age in which the prevalence or an index of dental caries had been evaluated. Eligible studies were identified through the search carried out in 6 databases and manual search, without publication time restriction. Fifty-four studies were found that met the eligibility criteria. In these included studies it was observed that, in the last decades, the prevalence of caries in Mexican children and adolescents exhibits a tendency to decrease this disease. In the 1980s, caries prevalences of up to 92.8% were reported; between 1990-1999, the highest reported prevalence was 97%; from 2000-2009, the highest reported prevalence was 95%; from 2010 to 2019 the highest prevalence was 94.6%; and from 2020 and 2021, prevalences of up to 88.5% were reported. Although there has been a decrease in the prevalence of caries in Mexican children, this disease continues to be linked to biological, behavioral and socioeconomic determinants.

The Association Between Maternal Nutritional Status During Pregnancy and Caries Experience in Their Offspring: A Literature Review

Previous studies have discovered intergenerational linkage between maternal nutritional status and the subsequent health of their offspring. This literature review aimed to explore the connection between the nutritional status of mothers during pregnancy and the occurrence of dental caries in their children. PubMed and Scopus were used for searching articles, adhering to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) protocol. The process involved eliminating duplicate articles, and further refinement included articles published within the timeframe of 2013-2023 and those published in the English language. Review articles, studies involving animals, letters to the editor, book sections, and conference proceedings were excluded. Articles that did not provide information on the variables of interest and sample details were also excluded. Data extraction included author names, article titles, publication years, study designs, indicators of maternal nutritional status, type of dentition under consideration, and the reported outcomes. After meticulous removal of duplicate articles and careful application of the inclusion and exclusion criteria, 7 articles met the study's eligibility criteria. The study results collectively indicated that lower levels and intake of maternal plasma vitamin D, reduced maternal plasma folate levels, inadequate gestational weight gain, and overall poor maternal nutritional status were associated with an increased risk of dental caries in their children. It is crucial for mothers to maintain a diet that guarantees the adequate nutrition of the developing fetus.

Comparative Evaluation of Dental Caries Score Between Teledentistry Examination and Clinical Examination: A Systematic Review and Meta-Analysis.

Dental caries is a common dental health problem affecting all age groups across the globe. Accurate detection and assessment of dental caries are crucial for effective treatment and preventive measures. Teledentistry, which involves remote dental assessment using digital technologies, has shown promise as a potential tool for caries screening. This systematic review and meta-analysis aims to compare the dental caries scores obtained from clinical examinations and teledentistry assessments. Literature searches were conducted across databases such as PubMed, Embase, the Cochrane Library, Scopus, the Web of Science, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), and PsycINFO by using predefined search terms and inclusion criteria. Two reviewers separately extracted the data. The study designs, evaluation techniques, dentition types, mean scores, and follow-up times of the included studies were examined. The New Castle-Ottawa Scale was used to assess the risk of bias. Review Manager (RevMan) (computer program) Version 5.4, The Cochrane Collaboration 2020, was used for the quantitative assessment of the data. Eight studies met the inclusion criteria and were included in the review. The findings revealed that teledentistry assessments (based on intraoral photographs captured using smartphones or intraoral cameras) demonstrated comparable accuracy to traditional clinical examinations in detecting and assessing dental caries. Among the four studies that were quantitatively analysed, no significant difference was noted at p = 0.09. A mean difference of 0.64 (95% confidence interval (CI): -0.10; 1.38) suggested that clinical examination and teledentistry-based checkup were on par with each other for the detection of dental caries. The New Castle-Ottawa scale (NOS) grading indicated that the studies were of good quality. Teledentistry may be an effective approach for identifying and evaluating dental caries. However, further research is required to substantiate the findings observed in the present review.

Amelogenesis Imperfecta Restorations Survival Rate: A Retrospective Study

Introduction: Amelogenesis imperfecta (AI) is a rare genetic disease affecting both dentitions. Factors such as age, socioeconomic status, dentition and AI type and severity should be taken into consideration in treatment planning. Aim: This retrospective study aimed to assess the survival rate of AI main restorative options and the effects of gender and dentition type. Methods: The study sample comprised 28 dental records of patients aged 5-17 years affected by AI (15 females, 13 males) and with anterior and/or posterior restoration in primary and/or permanent tooth/teeth. The fate of each restoration was classified into three categories: failed, withdrawn and censored and analyzed by the life table method of survival analysis. Results: Out of 233 restorations performed, the most frequently used restoration was preformed metal crowns (PMCs), followed by anterior composite, posterior composite, adhesive casting, Ketac fill and amalgam respectively. The two main restorations, PMCs and anterior composite were included in the statistical analysis. The survival rate of PMCs was significantly higher than anterior composite (p&lt;0.001). The anterior composite restorations survived significantly longer in males (p&lt;0.05). Females had significantly better survival rate of PMCs (p&lt;0.05). There was no statistically significant effect of the operator group of restoration survival. Conclusion: The anterior composite restorations survived significantly longer in males and females had significantly better survival rate of PMCs than males.

A saw-toothed eel †Serrivomer glehni sp. nov. from the Miocene of Sakhalin Island, north-western Pacific

ABSTRACT †Serrivomer glehni, a new species of the Neogene saw-toothed eel (Anguilliformes, Serrivomeridae) is described based on the 55 specimens from the Middle–Upper Miocene Kurasi Formation of Sakhalin Island, Russia. This is the third record of fossil saw-toothed eels since the recovery of partial skeletons from the Miocene of Japan and Italy. The new species demonstrates close similarity to the extant Serrivomer species in overall body form and shape of separate bones and their complexes. The new species is characterized by the “longidentatus” type of vomerine dentition and by a single branchiostegal ray protruding beyond the hyoid bar, which suggests a close affinity to the modern S. sector. It can be reliably distinguished from all other species of Serrivomer by its lower number of vertebrae (134 vs. 140–172) and its larger cleithrum, which is positioned under the seventh instead of the eighth vertebral centrum. http://zoobank.org/urn:lsid:zoobank.org:pub:50673E06-602C-4CA1-8CFF-AD992BCAEBED

Benign Pediatric Jawbone Lesions: A 10-Year Clinical and Radiological Pilot Study

This study aimed at presenting a retrospective longitudinal analysis of the pediatric jaw lesions treated at the Oral and Maxillofacial Surgery Clinic in Cluj-Napoca, Romania, over a timeframe of ten years (2012 to 2022). The clinical and radiological characteristics of the jawbone lesions, the treatment outcome, and the recurrence incidence were described. All consecutive patients aged below 18 years, with histologically diagnosed odontogenic tumors (OTs), nonodontogenic tumors (non-OTs), or odontogenic cysts (OCs) were included. Age, dentition type, clinical symptoms, preoperative and postoperative radiological tests, histological diagnosis, treatment, and follow-up information one year following the diagnoses were all examined. Eighty-two cases were included. The ratio of men to women was 1.15:1, with the mandible predominating by 64.4%. Inflammatory radicular cysts predominated in 31.7% of cases. A total of 42.68% of the patients were asymptomatic. Enucleation was the most frequent surgical technique (45.1%), followed by cystectomies (28%) and marsupialization (14.6%). The overall recurrence rate was 7.3%; the most recurrent histopathological lesion was the odontogenic keratocyst. This study sheds new light on the clinical and radiological characteristics, treatment outcomes, and recurrence rate of juvenile jawbone lesions in children and adolescents. The diagnosis and treatment of jawbone lesions in children and adolescents can be enhanced with the use of epidemiological, clinical, and imagistic information.

Prevalence of dental anomalies of size and shape, in pediatric patients aged 6 to 17 years of the city of huánuco 2019-2022

To determine the prevalence of dental anomalies of size and shape in patients aged 6 to 17 years, treated in Huánuco from 2019 to 2022. The study was descriptive, retrospective cross-sectional with a sample of 362 Panoramic radiographs of patients 6 to 17 years of age. I make detailed observations for each observation sheet, the patient's age, sex, dental shape and size alterations, the type of dentition presented, the affected quadrant and the type of dental piece. A higher prevalence of dental anomaly of shape was found with 85.10% (308) and of size with 14.9% (54). In relation to the quadrant, the tooth with rhizomycorrhexis presented the highest prevalence with 18.5% (10) in quadrant II while macrodontia presented 13.0% (7) in quadrant I and II, while the shape alteration of the shovel tooth presented the highest prevalence in quadrant II with 24.5% (76). There is a higher prevalence of shape anomalies as opposed to size anomalies that were less prevalent in the research work, being the female sex and the age group 11 to 17 years the most prevalent.

Panorametric study in a paediatric population in Madrid.

The aim of the study was to establish the normality ranges of the linear and angular measurements that can be carried out in orthopantomographies (OPGs) of a paediatric sample from Madrid, according to sex and dentition. OPGs performed in the Radiology Service of the Faculty of Dentistry of the Complutense University of Madrid (UCM) from caucasic children between 4-14 years old were selected. A total of 44 measurements were made in the OPGs, and the sex and type of dentition of each child were recorded. Panoramic Mandibular Index and Antegonial Index were also calculated. Statistical tests were performed with a confidence level of 95% (p < 0.05) and bilateral significance to analyse the differences between sex and type of dentition, and the correlation between the measurements of the right and left sides. A total sample of 160 OPGs (50% boys, 50% girls) were analysed. 16.25% of the sample was in primary dentition, 50% in first phase mixed dentition, 17.5% in second phase mixed dentition and 16.25% in permanent dentition. Statistically significant differences were found with respect to the sex of the subjects in 11 of the measurements; and 44 in relation to the dentition stages of the subjects. A strong correlation is found between the measurements on the right and left sides. The application of panoramic measurements as indicators of normality can help in the detection of craniofacial alterations in growth and development of the lower facial third.