Journal of Yeungnam Medical Science

Original article

Cytotoxicity of dental self-curing resin for a temporary crown: an in vitro study: Jae-wan Ko, Joon Sakong, Sohee Kang; J Yeungnam Med Sci. 2023;40(Suppl):S1-S8. Published online April 26, 2023; DOI: https://doi.org/10.12701/jyms.2023.00080

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Abstract PDF: Background
Residual monomer tests using high-performance liquid chromatography and cytotoxicity tests were performed to analyze the effect on the oral mucosa of a self-curing resin for provisional crown production.
Methods
A cytotoxicity test was performed to confirm whether leaked residual monomers directly affected oral mucosal cells. The cytotoxicity of the liquid and solid resin polymers was measured using a water-soluble tetrazolium (WST) test and microplate reader.
Results
In the WST assay using a microplate reader, 73.4% of the cells survived at a concentration of 0.2% liquid resin polymer. The cytotoxicity of the liquid resin polymer was low at ≤0.2%. For the solid resins, when 100% of the eluate was used from each specimen, the average cell viability was 91.3% for the solid resin polymer and 100% for the hand-mixed self-curing resin, which is higher than the cell viability standard of 70%. The cytotoxicity of the solid resin polymer was low.
Conclusion
Because the polymerization process of the self-curing resin may have harmful effects on the oral mucosa during the second and third stages, the solid resin should be manufactured indirectly using a dental model.

Case reports

Three-dimensional printing of temporary crowns with polylactic acid polymer using the fused deposition modeling technique: a case series: Eun-Kyong Kim, Eun Young Park, Sohee Kang; J Yeungnam Med Sci. 2023;40(3):302-307. Published online November 4, 2022; DOI: https://doi.org/10.12701/jyms.2022.00612

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With recent developments in digital dentistry, research on techniques and materials for three-dimensional (3D) printing is actively underway. We report the clinical applications and outcomes of 3D printing of temporary crowns fabricated with polylactic acid (PLA) using a fused deposition modeling (FDM) printer. Five participants were recruited from among patients scheduled to be treated with a single full-coverage crown at a dental clinic in a university medical center from June to August 2022. We used 3D-printed crowns fabricated with PLA using an FDM printer as temporary crowns and were assessed for discomfort, fracture, and dislodging. The 3D-printed temporary crowns were maintained without fracture, dislodging, or discomfort until the permanent prosthesis was ready. The average time required for printing the temporary crowns was approximately 7 minutes. The 3D printing of temporary crowns with PLA using an FDM printer is a convenient process for dentists. However, these crowns have some limitations, such as rough surface texture and translucency; therefore, the 3D printing process should be improved to produce better prostheses.

Citations

Citations to this article as recorded by

The Applications of 3D-Printing Technology in Prosthodontics: A Review of the Current Literature
Mohammed H Alyami
Cureus.2024;[Epub] CrossRef
Cytotoxicity of dental self-curing resin for a temporary crown: an in vitro study
Jae-wan Ko, Joon Sakong, Sohee Kang
Journal of Yeungnam Medical Science.2023; 40(Suppl): S1. CrossRef
Wear resistance of dental resin crowns in accordance with different additive manufacturing technologies and abrader types during chewing simulations
Myoung Ji Choi, Jae-Sung Kwon
Korean Journal of Dental Materials.2023; 50(4): 217. CrossRef

Oral chemical burns caused by topical application of policresulen: a case report: Hwa Suk Chae, Sohee Kang; J Yeungnam Med Sci. 2023;40(3):293-296. Published online October 20, 2022; DOI: https://doi.org/10.12701/jyms.2022.00472

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Abstract PDF: Oral mucosal burns can occur after contact with various chemical agents, and commonly manifest as areas of mucosal sloughing and ulceration. Policresulen (Albothyl, Celltrion Pharm Inc.) is an over-the-counter topical antiseptic that is frequently used to treat stomatitis. Policresulen solution is highly acidic, with an approximate pH of 0.6; it can thus cause mucosal injury when improperly applied in the oral cavity. Here, we present a rare case of an oral mucosal burn resulting from incorrect self-administration of policresulen and emphasize the importance of increasing understanding of this adverse drug event among consumers and health professionals.

A useful method of using the healing abutments for interocclusal records in implant overdenture: a case report: Hyunsuk Choi, Sohee Kang; J Yeungnam Med Sci. 2022;39(4):341-343. Published online November 17, 2021; DOI: https://doi.org/10.12701/yujm.2021.01466

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Abstract PDF: To determine the vertical dimension and centric relation during the construction of implant overdentures, the record base and wax rim may need to be adjusted. The conventional method has several drawbacks, as it requires repeated tightening and loosening of the impression coping. Here, we report a useful and novel method for interocclusal records using the healing abutments in implant overdentures. Our case demonstrates that this method is easier and simpler and prevents gingival collapse.

Review article

Current aspects and prospects of glass ionomer cements for clinical dentistry: Eun Young Park, Sohee Kang; Yeungnam Univ J Med. 2020;37(3):169-178. Published online July 9, 2020; DOI: https://doi.org/10.12701/yujm.2020.00374

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30 Crossref

Abstract PDF

Glass ionomer cement (GIC) is a tailor-made material that is used as a filling material in dentistry. GIC is cured by an acid-base reaction consisting of a glass filler and ionic polymers. When the glass filler and ionic polymers are mixed, ionic bonds of the material itself are formed. In addition, the extra polymer anion reacts with calcium in enamel or dentin to increase adhesion to the tooth tissue. GICs are widely used as adhesives for artificial crowns or orthodontic brackets, and are also used as tooth repair material, cavity liner, and filling materials. In this review, the current status of GIC research and development and its prospects for the future have been discussed in detail.

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Gabriela Turcu, Oana Cucoveica , Alina Stefanache , Codrin Paul Fuioaga , Cosimo Caltabellotta , Norin Forna , Carmen Stadoleanu , Radu Mircea Sireteanu-Cucui
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Original article

Mineralization-inducing potentials of calcium silicate-based pulp capping materials in human dental pulp cells: Sohee Kang; Yeungnam Univ J Med. 2020;37(3):217-225. Published online May 22, 2020; DOI: https://doi.org/10.12701/yujm.2020.00248

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Abstract PDF

Background
To provide a long-term bacterial seal through the formation of reparative dentin bridge, calcium silicate-based pulp capping materials have been used at sites of pulpal exposure. The aim of this study was to evaluate the mineralization-inducing potentials of calcium silicate-based pulp capping materials (ProRoot MTA [PR], Biodentine [BD], and TheraCal LC [TC]) in human dental pulp cells (HDPCs).
Methods
Specimens of test materials were placed in deionized water for various incubation times to measure the pH variation and the concentration of calcium released. The morphology of HDPCs cultured on the specimens was examined using a confocal laser scanning microscope (CLSM). Alizarin red S staining and alkaline phosphatase assays were used to evaluate mineralization-inducing potentials of the capping materials.
Results
BD showed the highest calcium release in all test periods, followed by PR and TC. (p<0.05). All experimental groups showed high alkalinity after 1 day, except at 14 days. BD showed the highest cell viability compared with PR and TC after 1 and 3 days, while TC showed the lowest value (p<0.05). The CLSM analysis showed that cells were well adhered and expressed actin filaments for all pulp capping materials. Mineralization by PR and BD groups was higher than that by TC group based on alizarin red S staining. BD showed significantly higher alkaline phosphatase activity than PR and TC, while TC showed the lowest value (p<0.05).
Conclusion
Within the limitations of the in vitro study, BD had higher mineralization-inducing potential than PR and TC.

Citations

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Ex Vivo Osteogenesis Induced by Calcium Silicate-Based Cement Extracts
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Evaluation of the chemical, physical, and biological properties of a newly developed bioceramic cement derived from cockle shells: an in vitro study
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BMC Oral Health.2023;[Epub] CrossRef
Cytotoxicity of dental self-curing resin for a temporary crown: an in vitro study
Jae-wan Ko, Joon Sakong, Sohee Kang
Journal of Yeungnam Medical Science.2023; 40(Suppl): S1. CrossRef
Ion release, biocompatibility, and bioactivity of resin-modified calcium hydroxide cavity liners
Nastaran Taghvaei, Mehrsima Ghavami-Lahiji, Mehdi Evazalipour, Reza Tayefeh Davalloo, Ehsan Zamani
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