• The Journal of the Korean dental association
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• v.25 no.8 s.219
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• pp.744-745
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• 1987

• Journal of Technologic Dentistry
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• v.14 no.1
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• pp.15-21
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• 1992

• The Journal of the Korean dental association
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• v.13 no.4
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• pp.319-328
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• 1975

• Journal of Dental Rehabilitation and Applied Science
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• v.31 no.4
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• pp.329-339
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• 2015

Purpose: To investigate the information acquisition, selection criteria and selection methods of Mongolian dentists regarding adhesive agents for bonded restorations, and to provide future direction for continuing education. Materials and Methods: One hundred Mongolian dentists were interviewed and asked to complete a questionnaire containing 7 questions on general information about the responder, 8 questions on information acquisition and selection of bonded restoration agents, and 10 questions on continuing education. Results: Objective and credible information regarding bonded restoration materials were not being acquired, and logical material selection was not being made. The extent of continuing education was inadequate and not enough information regarding education was being acquired. The participants responded positively to online supplementary education. Conclusion: A systemized approach needs to be established in Mongolian dentistry to enable organized delivery of evidence-based guidelines and information, and logical selection of the numerous and various bonded restoration agents. Furthermore, the education of dentists, through various means, is required to enable proper use of the selected materials.

• The Journal of the Korean dental association
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• v.24 no.8 s.207
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• pp.675-683
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• 1986

• The Journal of the Korean dental association
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• v.29 no.12 s.271
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• pp.956-959
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• 1991

연세대학교 치과대학 치과재료학교실에서는 최근 문제가 되고 있는 NPG 동합금에 대하여 시험한 내용과 아울러 지난 11월 1일에 있었던 대한치과의사협회 종합학술대회에서 가진 본 교실 주최의 특강 내용을 정리하여 게재하오니 임상에 많은 참고가 있으시기 바랍니다.

• Journal of the korean academy of Pediatric Dentistry
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• v.48 no.2
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• pp.168-175
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• 2021

This study compared the microleakages and compressive strengths of various base materials. To evaluate microleakages, 50 extracted permanent premolars were prepared. The teeth divided into 5 groups of 10 each according to the base materials. Cavities with a 5.0 mm width, 3.0 mm length, and 3.0 mm depth were formed on the buccal surfaces of the teeth. After filling the cavities with different base materials, a composite resin was used for final restoration. Each specimen was immersed in 2% methylene blue solution and then observed under a stereoscopic microscope (× 30). To evaluate the compressive strength, 5 cylindrical specimens were prepared for each base material. A universal testing machine was used to measure the compressive strength. The microleakage was highest in the Riva light cure^TM group and lowest in the Biodentine^TM and Well-Root^TM PT groups. For the compressive strengths, in all groups, acceptable strength values for base materials were found. The highest compressive strength was observed in the Fuji II LC^TM group and the lowest strength in the Well-Root^TM PT group.

• The Journal of the Korean dental association
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• v.47 no.12
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• pp.817-822
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• 2009

치과보철학 분야에서 컴퓨터를 이용한 기술의 발달로 치료 계획, 수술, 보철물 수복에 이르기까지 CAD-CAM의 광범위한 적용이 가능해지고 있으며, 비용과 시간의 절약으로 효율적인 진료가 가능하다는 점을 인지한 많은 회사들의 투자로 다양한 프로그램과 기계들이 소개되고 있다. 그러나, 이렇게 활발한 제품 개발에도 불구하고 아직 실제 임상으로의 적용은 보편화되었다고 보기는 어려운데, 가장 큰 이유는 정확도에 대한 의심과 복잡하다고 느껴지는 초기의 숙련 과정에 있다고 하겠다. 제작회사들의 보고에 따르면 컴퓨터를 이용하여 디자인하고 절삭하는 것이 기존의 주조 기술보다 더 정교하다고 하였으나, 실제 임상에서는 미세한 오차를 간과한 데서 오는 최종 결과물과의 차이를 얘기하는 임상가들이 있는 것이 현실이다. 또, 그 사용 재료에 있어서도 초기 티타늄 금속 재료에 이어 심미적 요구를 위한 알루미나, 보다 향상된 강도를 가진 지르코니아에 이르기까지 다양한 재료들이 쏟아져 나오고 있다. 이에 본 논문에서는 다양한 CAD-CAM 시스템 중 대표적인 것 중의 하나인 Nobel Biocare사의 $Procera^{(R)}$ 시스템을 중심으로 지르코니아 수복물에 관한 최신 정보를 제공하며, 그 다양한 치과적 적용을 누구나 쉽고 정확하게 사용할 수 있는 임상 증례와 함께 소개함으로써 실제 임상 적용에 도움이 되고자 한다.

• Journal of Dental Rehabilitation and Applied Science
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• v.34 no.4
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• pp.290-296
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• 2018

Purpose: The aim of this study was to evaluate the polymerization ability of resin-based materials used for teeth splinting according to the thickness of cure. Materials and Methods: For this study, the Light-Fix and G-FIX developed for resinous splinting materials and the G-aenial Universal Flo, the high-flowable composite resin available as restorative and splinting material, were used. Ten specimens of the thickness of 2, 3, 4 and 5 mm and 5 mm in diameter for each composite resin (total 120) were prepared. The microhardness of top and bottom surfaces for each specimen was measured by the Vickers hardness testing machine. The polymerization ability of the composite resin for each thickness was statistically analyzed using independent T-test at a 0.05 level of significance. Results: There was no difference of polymerization ability regardless of the thickness in the Light-Fix and G-FIX. The G-aenial Universal Flo showed significantly low polymerization ability from the thickness of the 3 mm (P < 0.05). Conclusion: The Light-Fix and G-FIX, which are resin-based materials used for teeth splinting, are expected to be suitable for light curing up to 5 mm in thickness.

• Korean Journal of Dental Materials
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• v.44 no.1
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• pp.21-31
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• 2017

The purpose of this study was to fabricate a biocompatible fluoride varnish with sustained fluoride release, and to compare it with commercial fluoride varnishes. For the experimental fluoride varnish, bis-GMA (BG) or two types of rosin (KR-610: K0, KR-612: K2) were used as bases. Either ethyl acetate or ethanol was added as solvent and 5 wt% NaF was used. 5 mg of experimental F- varnishes and 2 commercial products, Cavity shield (CS) and Flor-opal (FO), were applied on a labial surface of bovine teeth ($10mm{\times}7mm$). The amount of fluoride release was measured at 1 hr, 2 hrs, 3 hrs, 4 hrs, 8 hrs, 12 hrs, 1 day, 3 days, 5 days, 10 days, 15 days, 20 days and 30 days. MTT test was done with diluted F- varnishes using ethanol. Statistical analysis was done with one-way ANOVA and Duncan multiple range test (${\alpha}=0.05$). BG showed the highest fluoride release at 1 hr (P<0.05), while that of K0 was highest at 2 hrs (P<0.05). From 1 day to 5 days, experimental fluoride varnishes showed higher fluoride release than the commercial products (P<0.05), and there were no significant differences after 5 days (P>0.05). For MTT test, K0 and FO showed higher cell viability than other experimental groups (P<0.05), with no significant differences with K2 (P>0.05). Considering the sustained fluoride release and cell viability of the experimental rosin-based fluoride varnishes compared with commercial products, it will be appropriate for clinical application.