scholarly journals Retrospective study on three-dimensional characteristics of mesiodens using CBCT in pediatric dentistry

2021 ◽  
Vol 48 (1) ◽  
pp. 77-94
Author(s):  
GiYoun Ryu ◽  
Ji-Soo Song ◽  
Teo Jeon Shin ◽  
Hong-Keun Hyun ◽  
Jung-Wook Kim ◽  
...  
Keyword(s):  
Treatment Plan ◽  
Three Dimensional ◽  
Pediatric Dentistry ◽  
Horizontal Direction ◽  
Permanent Teeth ◽  
Vertical Position ◽  
Factors Affecting ◽  
Significant Difference ◽  
National University ◽  
Seoul National University

The purpose of this study was to investigate the three-dimensional characteristics of mesiodens using Cone-beam Computed Tomography(CBCT) and analyze the factors affecting complications and anesthetic methods of extraction. This study evaluated 602 mesiodens of 452 patients who underwent extraction of mesiodens at the department of Pediatric Dentistry in Seoul National University Dental Hospital between 2017 and 2019.The ratio of mesiodens patients over total patient per year was gradually increased over the past 20 years. Mesiodens with labio-palatally horizontal direction while root directing labial were the most common among the mesiodens with horizontal direction. Mesiodens were the most common at the cervical side of the adjacent teeth(37.0%) and mesiodens located in the near-palatal side were observed about 3.83 times higher than the far-palatal side. Most of the mesiodens(82.1%) were in contact with adjacent permanent teeth on all three sides of the CBCT and 46.2% of mesiodens had curved roots. The patient’s age, vertical position, presence of complications, and proximity showed a significant difference in the selection of general anesthesia among anesthetic methods. The direction and vertical position of mesiodens had a significant effect on complications.These results provide a better understanding of mesiodens for establishing an accurate diagnosis and treatment plan.

scholarly journals Association between Developmental Anomalies of Permanent Lateral Incisors and Tooth Eruption Disturbances

2020 ◽  
Vol 47 (2) ◽  
pp. 128-139
Author(s):  
Minji Kim ◽  
Jisoo Song ◽  
Teo Jeon Shin ◽  
Hong-Keun Hyun ◽  
Young-Jae Kim ◽  
...  
Keyword(s):  
Treatment Plan ◽  
Pediatric Dentistry ◽  
Lateral Incisor ◽  
Permanent Teeth ◽  
Optimal Time ◽  
Developmental Anomalies ◽  
Maxillary Central Incisor ◽  
National University ◽  
Seoul National University ◽  
Dens Invaginatus

The purpose of this study was to examine the prevalence of developmental anomalies of permanent lateral incisor and eruption disturbances and analyze the association between two components. Panoramic radiographs of 3984 patients (aged 5 to 13 years) who visited the Department of Pediatric Dentistry of Seoul National University Dental Hospital between November 2016 and October 2017 were screened.<br/>The prevalence of developmental anomalies of permanent lateral incisors was 10.2%. The most common developmental anomalies were congenitally missing teeth(66.1%), followed by peg lateralis(33.5%). The prevalence of eruption disturbances was 16.5%. Among the patient with developmental anomalies of permanent lateral incisors, associated eruption disturbances were appeared on 31.1% of patients. Peg lateralis(<i>p</i> < 0.001), underdeveloped lateral incisors(<i>p</i> < 0.001) and dens invaginatus(<i>p</i> = 0.004) were associated significantly with eruption disturbance of permanent teeth. Eruption disturbance in patients with peg lateralis and dens invaginatus was most prevalent in maxillary canine. For patients with underdeveloped lateral incisor, eruption disturbance of maxillary central incisor was most frequent.<br/>It is important for patients with developmental anomalies of lateral incisors to detect associated eruption disturbance early through regular checkup. Diagnosis and treatment plan in view of such relationships is important in order to treat appropriately at the optimal time.

Factors Affecting Self-Eruption of Displaced Permanent Maxillary Canines

Medicina ◽  
2011 ◽  
Vol 47 (3) ◽  
pp. 22
Author(s):  
Dalia Smailienė ◽  
Antanas Šidlauskas ◽  
Kristina Lopatienė ◽  
Vesta Guzevičienė ◽  
Gintaras Juodžbalys
Keyword(s):  
Characteristic Curve ◽  
Treatment Success ◽  
Vertical Position ◽  
Dental Arch ◽  
Factors Affecting ◽  
Significant Difference ◽  
One Year ◽  
Unerupted Teeth ◽  
The Impact

The aim of this study was to examine the possibility of the spontaneous eruption of displaced unerupted maxillary canines after the extraction of the deciduous canine and dental arch expansion and to determine the impact of initial canine position on treatment success rate. Materials and Methods. The study sample included 50 patients (mean age, 13.5 years [SD, 2.2]) with unilaterally displaced unerupted maxillary canines. Deciduous canines were extracted, and the space for displaced canine was created at the beginning of the study. The follow-up period for the spontaneous eruption was 12 months. The initial vertical, horizontal, labio-palatal position and angle of inclination to the midline of the displaced canine were assessed on panoramic radiographs. Results. Only 42% of displaced canines erupted spontaneously within one-year period (52.9% of labially displaced canines and 36.4% of palatally displaced canines). A significant difference of inclination was determined between spontaneously erupted and unerupted teeth in the labially displaced canine group (P<0.01), with no difference in the palatally displaced canine group. The receiver operating characteristic curve analysis showed that the critical angle of inclination for the spontaneous eruption of the retained canine was 20º (sensitivity 0.759; specificity 0.571; P<0.05). The majority of unerupted canines (75.9%) were inclined more than 20º. The initial height of canine was crucial for spontaneous eruption (sensitivity 0.966; specificity 0.81; P<0.001). This was true for both palatal and labial cases. Conclusions. The initial vertical position of the labially and palatally displaced canines and the inclination of the labially displaced canines were the most important predictors for spontaneous eruption of the cuspid.

scholarly journals Analysis of Composite Resin Treatment Pattern Changes After the Insurance Coverage

2021 ◽  
Vol 48 (2) ◽  
pp. 151-159
Author(s):  
Sangmi Jo ◽  
Koeun Lee ◽  
Okhyung Nam ◽  
Hyo-seol Lee ◽  
Sungchul Choi ◽  
...  
Keyword(s):  
Composite Resin ◽  
Insurance Coverage ◽  
Pediatric Dentistry ◽  
Permanent Tooth ◽  
Permanent Teeth ◽  
Permanent Molar ◽  
Caries Treatment ◽  
Significant Difference ◽  
Before And After ◽  
Composite Resin Restoration

Since January 2019, insurance coverage for caries treatment of permanent teeth using composite resin in children aged 12 and under has started in South Korea. The purpose of this study was to compare the pattern of permanent molar composite resin restoration aged 12 and under before and after the insurance coverage from January 2009 to March 2020 in the Department of Pediatric Dentistry at Kyung Hee University Dental Hospital at Gangdong.<br/>Since the insurance coverage was started in 2019, the frequency of permanent molar composite resin restoration aged 12 and under has increased more than twice. There was a significant change in frequency of resin restoration by shape of cavity comparing before and after the insurance coverage, whereas there was no significant difference in changes by patient age, gender and position of tooth.<br/>As accessibility to the permanent tooth composite resin restoration is increased by the insurance coverage, which shows a fair survival rate, it is expected that it could be able to secure oral health in the early permanent dentition aged 12 and under.

Rising of LOXHD1 as a signature causative gene of down-sloping hearing loss in people in their teens and 20s

2021 ◽  
pp. jmedgenet-2020-107594
Author(s):  
Bong Jik Kim ◽  
Hyoung Won Jeon ◽  
Woosung Jeon ◽  
Jin Hee Han ◽  
Jayoung Oh ◽  
...  
Keyword(s):  
Young Adults ◽  
Hearing Loss ◽  
Three Dimensional ◽  
Phenotype Correlation ◽  
Causative Gene ◽  
Genotype Phenotype Correlation ◽  
National University ◽  
Common Founder ◽  
Seoul National University ◽  
Efficient Learning

BackgroundDown-sloping sensorineural hearing loss (SNHL) in people in their teens and 20s hampers efficient learning and communication and in-depth social interactions. Nonetheless, its aetiology remains largely unclear, with the exception of some potential causative genes, none of which stands out especially in people in their teens and 20s. Here, we examined the role and genotype–phenotype correlation of lipoxygenase homology domain 1 (LOXHD1) in down-sloping SNHL through a cohort study.MethodsBased on the Seoul National University Bundang Hospital (SNUBH) genetic deafness cohort, in which the patients show varying degrees of deafness and different onset ages (n=1055), we have established the ‘SNUBH Teenager–Young Adult Down-sloping SNHL’ cohort (10–35 years old) (n=47), all of whom underwent exome sequencing. Three-dimensional molecular modelling, minigene splicing assay and short tandem repeat marker genotyping were performed, and medical records were reviewed.ResultsLOXHD1 accounted for 33.3% of all genetically diagnosed cases of down-sloping SNHL (n=18) and 12.8% of cases in the whole down-sloping SNHL cohort (n=47) of young adults. We identified a potential common founder allele, as well as an interesting genotype–phenotype correlation. We also showed that transcript 6 is necessary and probably sufficient for normal hearing.ConclusionsLOXHD1 exceeds other genes in its contribution to down-sloping SNHL in young adults, rising as a signature causative gene, and shows a potential but interesting genotype–phenotype correlation.

scholarly journals Bilateral Mesiodens in Monozygotic Twins: 3D Diagnostic and Management

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Carla Vecchione Gurgel ◽  
Ana Lídia Soares Cota ◽  
Tatiana Yuriko Kobayashi ◽  
Salete Moura Bonifácio Silva ◽  
Maria Aparecida Andrade Moreira Machado ◽  
...  
Keyword(s):  
High Resolution ◽  
Treatment Plan ◽  
Three Dimensional ◽  
Monozygotic Twins ◽  
Monozygotic Twin ◽  
Permanent Teeth ◽  
Supernumerary Teeth ◽  
Supernumerary Tooth ◽  
3D Images ◽  
Frequent Type

Mesiodens is the most frequent type of supernumerary tooth and may occur in several forms, causing different local disorders, such as impaction of the anterior permanent teeth. High-resolution three-dimensional (3D) images have improved the diagnosis and treatment plan of patients with impacted and supernumerary teeth. The purpose of this paper was to report a case of two mesiodens in monozygotic twin boys with appropriate 3D diagnostic and treatment plan.

scholarly journals The Impact of Writing on Academic Performance for Medical Students

2020 ◽  
Author(s):  
Songeui Kim ◽  
Ji Won Yang ◽  
Jaeseo Lim ◽  
Seunghee Lee ◽  
Jungjoon Ihm ◽  
...  
Keyword(s):  
Medical Education ◽  
Academic Performance ◽  
Medical Students ◽  
Transfer Of Knowledge ◽  
Educational Benefits ◽  
Significant Difference ◽  
National University ◽  
Seoul National University ◽  
The Impact ◽  
The Given

Abstract Background Since the 1970s, writing has been widely used in classroom settings. Writing enhances learning, but there are limited studies that prove its effectiveness, especially in the medical education setting. The purpose of this study, therefore, is to investigate the effect of writing on medical students’ academic performance. Methods An experiment was conducted with 139 medical students from Seoul National University College of Medicine. They were randomly assigned to three study conditions: self-study (SS), expository writing (EW), and argumentative writing (AW). Each group studied the given material by the method they were assigned, and they were tested on their understanding and transfer of knowledge. Results The results showed that the two writing groups displayed better performance than the SS group in transfer type items, while there was no difference in scores between the EW and AW group. However, the three groups showed no significant difference in their scores for rote-memory type items . Also, there was a positive correlation between writing score and transfer type items in the AW group. Conclusions This study provides empirical evidence for writing to be adopted in medical education for greater educational benefits. Our findings indicate that writing can enhance learning and higher-order thinking, which are critical for medical students.

scholarly journals A Study on Treatment under General Anesthesia in Pediatric Dentistry at Seoul National University Dental Hospital

2018 ◽  
Vol 45 (2) ◽  
pp. 170-178 ◽  
Author(s):  
Jeong-Hwa Han ◽  
Ji-Soo Song ◽  
Teo Jeon Shin ◽  
Hong-Keun Hyun ◽  
Young-Jae Kim ◽  
...  
Keyword(s):  
General Anesthesia ◽  
Pediatric Dentistry ◽  
Dental Hospital ◽  
National University ◽  
Seoul National University

scholarly journals Dental Anxiety among Undergraduate Students of a National University in Brunei Darussalam

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Zhi Qi Tan ◽  
Ishak Nurul Sa'idah ◽  
Hanif Abdul Rahman ◽  
Jagjit Singh Dhaliwal
Keyword(s):  
Undergraduate Students ◽  
Treatment Plan ◽  
Dental Anxiety ◽  
Population Group ◽  
Cross Sectional ◽  
Dental Visits ◽  
Brunei Darussalam ◽  
Significant Difference ◽  
National University ◽  
The Mean

This study aimed to investigate the nature of dental anxiety among undergraduate students of a national university in Brunei Darussalam. Participants were undergraduate students from different faculties of a national university. It was a cross-sectional study using a questionnaire that included their personal demographics, the Modified Dental Anxiety Scale (MDAS) questions and questions regarding their last dental visit. The degree of anxiety was compared in relation to different factors as mentioned above. Data collected was analyzed using independent t-test and one-way ANOVA. Results showed that the frequency of dental anxiety among the undergraduate students was 70.8%. The mean total MDAS score was 12.3 ± 4.28. Females (13.5±5.12) were more dentally anxious than males (12.2±4.73) (p=0.027). There was a significant difference in the mean MDAS score (p < 0.001) when comparing patterns of dental visits with dental anxiety. More students were fearful of local anesthetic injection than getting tooth drilled. (4) Conclusion: Dental anxiety still remains as one of the obstacles that clinicians face. More studies need to be done to provide a better understanding on how dental anxiety can affect the pattern of dental visits. Future studies should explore the etiology of dental anxiety. This study helps to create awareness on the presence of dental anxiety amongst the existent population group and also to aid clinicians in identifying areas of dentistry where patients are most anxious about in order to come up with a suitable treatment plan.

scholarly journals Three-dimensional semi-automated volumetric assessment of the pulp space of teeth following regenerative dental procedures

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Heeresh Shetty ◽  
Shishir Shetty ◽  
Adesh Kakade ◽  
Aditya Shetty ◽  
Mohmed Isaqali Karobari ◽  
...  
Keyword(s):  
Medical Imaging ◽  
Open Source ◽  
Three Dimensional ◽  
Volume Estimation ◽  
Permanent Teeth ◽  
3D Slicer ◽  
Link Type ◽  
Volumetric Assessment ◽  
Critical Measure ◽  
Significant Difference

AbstractThe volumetric change that occurs in the pulp space over time represents a critical measure when it comes to determining the secondary outcomes of regenerative endodontic procedures (REPs). However, to date, only a few studies have investigated the accuracy of the available domain-specialized medical imaging tools with regard to three-dimensional (3D) volumetric assessment. This study sought to compare the accuracy of two different artificial intelligence-based medical imaging programs namely OsiriX MD (v 9.0, Pixmeo SARL, Bernex Switzerland, https://www.osirix-viewer.com) and 3D Slicer (http://www.slicer.org), in terms of estimating the volume of the pulp space following a REP. An Invitro assessment was performed to check the reliability and sensitivity of the two medical imaging programs in use. For the subsequent clinical application, pre- and post-procedure cone beam computed tomography scans of 35 immature permanent teeth with necrotic pulp and periradicular pathosis that had been treated with a cell-homing concept-based REP were processed using the two biomedical DICOM software programs (OsiriX MD and 3D Slicer). The volumetric changes in the teeth’s pulp spaces were assessed using semi-automated techniques in both programs. The data were statistically analyzed using t-tests and paired t-tests (P = 0.05). The pulp space volumes measured using both programs revealed a statistically significant decrease in the pulp space volume following the REP (P < 0.05), with no significant difference being found between the two programs (P > 0.05). The mean decreases in the pulp space volumes measured using OsiriX MD and 3D Slicer were 25.06% ± 19.45% and 26.10% ± 18.90%, respectively. The open-source software (3D Slicer) was found to be as accurate as the commercially available software with regard to the volumetric assessment of the post-REP pulp space. This study was the first to demonstrate the step-by-step application of 3D Slicer, a user-friendly and easily accessible open-source multiplatform software program for the segmentation and volume estimation of the pulp spaces of teeth treated with REPs.

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