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  • 1
    Online Resource
    Online Resource
    Feasibility of a 3D Surgical Guide Technique for Impacted Supernumerary Tooth Extraction: A Pilot Study with 3D Printed Simulation Models
    MDPI AG ; 2019
    In:  Applied Sciences Vol. 9, No. 18 ( 2019-09-18), p. 3905-
    Details
    In: Applied Sciences, MDPI AG, Vol. 9, No. 18 ( 2019-09-18), p. 3905-
    Abstract: This study aimed to evaluate the feasibility of a 3-dimensional (3D) planned surgical guide technique designed for impacted supernumerary teeth (STs) extraction using 3D printed simulation models. In total, 17 participants from two university hospitals were recruited. Each participant performed surgery with both the conventional and surgical guide techniques. The following parameters were evaluated: (1) The time required for ST extraction, (2) the area of the window opening, and (3) the volume of the material removed. Time required for ST extraction was 213.65 ± 167.45 sec and 114.76 ± 42.87 sec in the conventional and surgical guide techniques, respectively, with significant differences (p = 0.028). The required area of the window opening was 48.10 ± 9.44 mm2 and 45.90 ± 8.17 mm2, respectively, in the conventional and surgical guide techniques, with no significant differences (p 〉 0.05). The required volume of the material removed was 121.65 ± 43.69 mm3 and 99.12 ± 17.88 mm3 in the conventional and surgical guide techniques, respectively, with significant differences (p = 0.031). The 3D planned surgical guide technique was effective for impacted ST extraction. Within the limits of this study, the surgical guide technique allows us to accomplish minimally invasive surgery within a shorter duration.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    URL: Article
    DOI: 10.3390/app9183905
    Language: English
    Publisher: MDPI AG
    Publication Date: 2019
    detail.hit.zdb_id: 2704225-X
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  • 2
    Online Resource
    Online Resource
    Radiation dosimetry analyses of radiographic imaging systems used for orthodontic treatment: comparison among child, adolescent, and adult patients
    Springer Science and Business Media LLC ; 2021
    In:  Oral Radiology Vol. 37, No. 2 ( 2021-04), p. 245-250
    Details
    In: Oral Radiology, Springer Science and Business Media LLC, Vol. 37, No. 2 ( 2021-04), p. 245-250
    Type of Medium: Online Resource
    ISSN: 0911-6028 , 1613-9674
    URL: Article
    DOI: 10.1007/s11282-020-00439-w
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2157096-6
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  • 3
    Online Resource
    Online Resource
    Orodispersible hyaluronic acid film delivery for oral wound healing in rats
    Elsevier BV ; 2022
    In:  Journal of Dental Sciences Vol. 17, No. 4 ( 2022-10), p. 1595-1603
    Details
    In: Journal of Dental Sciences, Elsevier BV, Vol. 17, No. 4 ( 2022-10), p. 1595-1603
    Type of Medium: Online Resource
    ISSN: 1991-7902
    URL: Article
    DOI: 10.1016/j.jds.2022.04.004
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2502332-9
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  • 4
    Online Resource
    Online Resource
    A Digital Fabrication of Dental Prosthesis for Preventing Self-Injurious Behavior Related to Autism Spectrum Disorder: A Case Report
    MDPI AG ; 2021
    In:  International Journal of Environmental Research and Public Health Vol. 18, No. 17 ( 2021-09-02), p. 9249-
    Details
    In: International Journal of Environmental Research and Public Health, MDPI AG, Vol. 18, No. 17 ( 2021-09-02), p. 9249-
    Abstract: This case report aimed to demonstrate the prosthetic solution of an autism patient with self-injurious behavior using digital dentistry. A 24-year-old male visited our clinic with chief complaints of severe gingival recession associated with self-injurious behavior. Bilateral fixed prosthesis with denture flange were delivered using a digital workflow for the protection of the gingiva. The patient showed healed gingival tissue, behavioral modification, and acceptable oral hygiene during the follow-up period. Also, his caregivers reported no recurrence of the self-injurious behavior. Autism patients usually show self-injurious behavior, which can damage their oral tissue. With adoption of this prosthesis, behavior modification as well as healing of oral tissue was achieved.
    Type of Medium: Online Resource
    ISSN: 1660-4601
    URL: Article
    DOI: 10.3390/ijerph18179249
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2175195-X
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  • 5
    Online Resource
    Online Resource
    The perspective of undergraduate dental students on web-based learning in pediatric dentistry during the COVID-19 pandemic: a Korean multicenter cross-sectional survey
    Springer Science and Business Media LLC ; 2021
    In:  BMC Medical Education Vol. 21, No. 1 ( 2021-12)
    Details
    In: BMC Medical Education, Springer Science and Business Media LLC, Vol. 21, No. 1 ( 2021-12)
    Abstract: The COVID-19 pandemic changed the world and created a shift in the dental education program. This sudden change in the dental education program may have affected the academic standards of dental students. This study aimed to evaluate the overall satisfaction and effectiveness of online learning in pediatric dentistry of undergraduate dental students’ during the COVID-19 pandemic in South Korea. Methods An anonymous online survey was sent to three dental schools, and responses were collected from dental school students. Questions included the demographics, perspectives of online classes, comparison of online and offline pediatric dentistry classes and opinions on how dental schools are handling the pandemic. Students’ perspectives on online classes were evaluated based on satisfaction with online education. Data were analyzed using the Kruskal-Wallis test and the Mann-Whitney U test. Results Most students took online classes from home (80.9%) using Zoom (50.4%). The majority reported overall program satisfaction (74.1%) and agreed that universities implemented online classes well (55%). Students who were in favor of online classes responded more positively to questions on the effectiveness and safety of online learning ( p   〈  0.05). Regardless of satisfaction with online education, the students agreed that the online education shift was the right decision in pandemic outbreak. Conclusions Dental students in South Korea preferred and adapted well to the web-based learning program in pediatric dentistry during COVID-19 pandemic.
    Type of Medium: Online Resource
    ISSN: 1472-6920
    URL: Article
    DOI: 10.1186/s12909-021-02928-w
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2044473-4
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  • 6
    Online Resource
    Online Resource
    Evaluating Measurements: A Comparative Study of Digital and Plaster Models for Orthodontic Applications in Mixed Dentition
    Korean Academy of Pediatric Dentistry ; 2024
    In:  THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY Vol. 51, No. 1 ( 2024-02-28), p. 55-65
    Details
    In: THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, Korean Academy of Pediatric Dentistry, Vol. 51, No. 1 ( 2024-02-28), p. 55-65
    Abstract: This study aimed to assess the accuracy of tooth widths, intermolar widths, and arch lengths acquired through two intraoral scanners, including iTero Element Plus Series (Align Technology, Santa Clara, CA, USA) and Trios 4 (3Shape, Copenhagen, Denmark), specifically on mixed dentition. A total of 30 subjects were divided into 2 groups, each undergoing both alginate impressions and intraoral scanning using either the iTero or Trios scanner. The plaster models were measured with a caliper, while the digital models were measured virtually. In the iTero group, all tooth width measurements exhibited differences compared to the plaster values, except for maxillary left lateral incisors ( 〈 i 〉 p 〈 /i 〉 = 0.179), mandibular right ( 〈 i 〉 p 〈 /i 〉 = 0.285), and left ( 〈 i 〉 p 〈 /i 〉 = 0.073) central incisors. The Trios group did not display significant differences in any of the tooth width measurements. Intermolar width comparisons for both groups indicated differences, except for mandibular primary canine to primary canine values ( 〈 i 〉 p 〈 /i 〉 = 0.426) in the iTero group. Regarding arch length, the mandibular anterior, maxillary right, and left arch lengths in the iTero group demonstrated larger caliper values than those of iTero. Conversely, in the Trios group, all parameters showed smaller caliper values, especially in upper anterior, maxillary right, mandibular right, and mandibular left arch lengths with significance ( 〈 i 〉 p 〈 /i 〉 = 0.027, 0.007, 0.003, and 0.047, respectively). Despite the differences between the two groups, digital models might be clinically suitable alternatives for plaster models. Pediatric dentists should carefully assess these differences, as a comprehensive evaluation would result in precise orthodontic treatment planning and favorable outcomes for young patients with mixed dentition.
    Type of Medium: Online Resource
    ISSN: 1226-8496 , 2288-3819
    URL: Article
    DOI: 10.5933/JKAPD.2024.51.1.55
    Language: English
    Publisher: Korean Academy of Pediatric Dentistry
    Publication Date: 2024
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  • 7
    Online Resource
    Online Resource
    Void characteristics and tortuosity of calcium silicate-based cements for regenerative endodontics: a micro-computed tomography analysis
    Springer Science and Business Media LLC ; 2021
    In:  BMC Oral Health Vol. 21, No. 1 ( 2021-12)
    Details
    In: BMC Oral Health, Springer Science and Business Media LLC, Vol. 21, No. 1 ( 2021-12)
    Abstract: Internal voids of materials can serve a hub for microorganism and affect the sealing ability. This study aimed to evaluate the sealing performance of calcium silicate-based cements in immature teeth treated with regenerative endodontics. Methods Twenty single root canals from immature permanent premolars were prepared using regenerative endodontic protocols. The root canals were randomly divided into two groups and sealed with mineral trioxide aggregate (MTA) and Biodentine (BD). The teeth were kept in humid environment for 7 days and scanned using micro-computed tomography. The voids within the cements were segmented and visualized using image processing, incorporating the modified Otsu algorithm. The porosity of each sample was also calculated as the ratio between the number of voxels of voids and the volume of the cements. Tortuosity was also calculated using the A-star algorithm. Results Voids larger than 70 μm were predominantly observed in the top and interfacial surface of cements. The others were evenly distributed. MTA and BD showed the same level of porosity and tortuosity at interfacial surfaces. In inner surfaces, MTA showed more less porosity and tortuosity compared to BD ( p   〈  0.05). Conclusions There were no differences in sealing performance between MTA and BD.
    Type of Medium: Online Resource
    ISSN: 1472-6831
    URL: Article
    DOI: 10.1186/s12903-021-01940-2
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2021
    detail.hit.zdb_id: 2091511-1
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  • 8
    Online Resource
    Online Resource
    Stress distribution in pediatric zirconia crowns depending on different tooth preparation and cement type: a finite element analysis
    Springer Science and Business Media LLC ; 2022
    In:  BMC Oral Health Vol. 22, No. 1 ( 2022-12-01)
    Details
    In: BMC Oral Health, Springer Science and Business Media LLC, Vol. 22, No. 1 ( 2022-12-01)
    Abstract: In clinical settings, tooth preparation for prefabricated zirconia crowns (PZCs) in the primary dentition varies widely. However, knowledge about the biomechanical behavior of PZCs in various clinical settings is limited. This study was conducted to evaluate the biomechanical behavior of PZCs in different clinical settings using 3-dimensional finite element analysis. Methods 3-dimensional models of the PZC, cement, and tooth with six different conditions were simulated in primary molar teeth, incorporating cement thickness (100, 500, and 1000 μm) and cement type (resin-modified glass ionomer cement and resin cement). A total of 200 N of occlusal force was applied to the models, both vertically and obliquely as representative cases. A general linear model univariate analysis with partial eta-squared (ηp 2 ) was performed to evaluate the relative effects of the variables. Results The overall stress of tooth was increased as the cement space increases under oblique loading. The von Mises stress values of the resin cements were significantly higher than those of the resin-modified glass ionomer cements for all cement thicknesses ( p   〈  .05). The effect size of the cement type (η p 2  = .519) was more dominant than the cement thickness (η p 2  = .132) in the cement layer. Conclusions Within the limits of this study, cement type has a greater influence on the biomechanical behavior of PZCs than cement thickness.
    Type of Medium: Online Resource
    ISSN: 1472-6831
    URL: Article
    DOI: 10.1186/s12903-022-02596-2
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2091511-1
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  • 9
    Online Resource
    Online Resource
    Evaluation of delphinidin as a storage medium for avulsed teeth
    Springer Science and Business Media LLC ; 2023
    In:  BMC Oral Health Vol. 23, No. 1 ( 2023-01-14)
    Details
    In: BMC Oral Health, Springer Science and Business Media LLC, Vol. 23, No. 1 ( 2023-01-14)
    Abstract: Delphinidin (DP), an anthocyanidin found in blueberries, has antioxidant and anti-inflammatory effects. This study aimed to investigate the efficacy of DP as a storage medium for avulsed teeth. Methods Human periodontal ligament cells were cultured and exposed to DP solution (10, 50, and 100 μM), Dulbecco’s modified Eagle’s medium, Hank’s balanced salt solution and tap water. Cell counting kit-8 assays were performed after 0.5, 1, 6, and 24 h to measure the cell viability. Nitric oxide assays and gelatin zymography were performed to evaluate the anti-inflammatory effects of DP. Reverse transcription-polymerase chain reaction was used to determine the expression levels of inflammatory cytokines. Results The viability of periodontal ligament cells was greatest at 100 μM DP. At 1 h, 100 μM DP decreased nitric oxide synthesis ( p   〈  .0167). Matrix metallopeptidase-9 activity was inhibited by DP in a dose-dependent manner ( p   〈  .0167). Moreover, treatment with 100 μM DP decreased the expression levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-8 in periodontal ligament cells ( p   〈  .0167). Conclusions Within the limits of this study, DP preserved the viability and suppressed the inflammatory response of periodontal ligament cells. These findings suggest that DP could be promising for preservation of avulsed teeth.
    Type of Medium: Online Resource
    ISSN: 1472-6831
    URL: Article
    DOI: 10.1186/s12903-023-02713-9
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2091511-1
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  • 10
    Online Resource
    Online Resource
    Three-Dimensional Digitalized Surface and Volumetric Analysis of Posterior Prefabricated Zirconia Crowns for Children
    MRE Press ; 2019
    In:  Journal of Clinical Pediatric Dentistry Vol. 43, No. 4 ( 2019-01-01), p. 231-238
    Details
    In: Journal of Clinical Pediatric Dentistry, MRE Press, Vol. 43, No. 4 ( 2019-01-01), p. 231-238
    Abstract: Objectives: This study was designed to compare the surface morphologies and volumes of posterior prefabricated zirconia crowns and posterior stainless steel crowns (SSCs) using digitalized three-dimensional (3D) reconstructed images. Study design: We tested prefabricated zirconia crowns (NuSmile ZR; Orthodontic Technologies, Houston, TX, USA) and SSCs (Kids Crown; Shinhung, Seoul, Korea) used to restore left maxillary and mandibular molars. A Rainbow scanner (Dentium, Seoul, Korea) was used to digitise the inner and outer surface morphologies of all crowns. The data were superimposed and evaluated using 3D software. The differences between the outer and inner surfaces and inner volume were measured. Results: The differences between the two types of crowns differed by tooth surface. At the occlusal surface, the differences were greater at the cusp tip than the fossa. At the axial level, the differences decreased toward the gingival margins. Also, relative volumetric ratios varied. Conclusions: Tooth preparation prior to placement of prefabricated zirconia crowns requires special consideration. Greater amounts of tooth reduction are necessary for posterior zirconia crowns than for SSCs. The occlusal surface requires more tooth reduction than the axial surface and the gingival margin.
    Type of Medium: Online Resource
    ISSN: 1053-4628 , 1557-5268
    URL: Article
    DOI: 10.17796/1053-4625-43.4.2
    Language: English
    Publisher: MRE Press
    Publication Date: 2019
    detail.hit.zdb_id: 2109214-X
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