• Restorative Dentistry and Endodontics
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• 제27권6호
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• pp.622-631
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• 2002

To understand the recent characteristics of the papers published in the Journal of Korean Academy of Conservative Dentistry(JKACD), All the papers in the JKACD of 1992 to 2001 were analyzed. A total of 513 papers were classified according to its type, fold and subject of the study, school and the number of authors, references, and written language. The results were as follows ; 1 According to the type of the paper, 506(98.6%) were original articles, 3(0.6%) were review articles, and 4(0.8%) were case reports. 2. Anual proportion of papers in the fold of operative dentistry was similar to that of endodontics 3. In the field of operative dentistry, esthetic restorative materials and bonding to tooth constituted major subjects of the studies. In the field of endodotics, pulp biology was prominent and canal shaping, endodontic microbiology and canal obturation were steadily reported. 4. According to author's school, similar number of papers were published in the field of operative den tistry and endodontics in general. However, some schools showed preponderances. 5. Most studies were done by two or more authors. Studies published by two authors were most 6. Fifty(9.7%) papers were done in collaboration with workers of the other field. 7. Average number of references cited in the papers was 41.2, including domestic references of 1.8. 40.7% of the papers was shown to cite no domestic papers at all. 8. Twenty-eight(5.5%) papers were written in English, with increasing ratio.

• Restorative Dentistry and Endodontics
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• 제35권3호
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• pp.149-151
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• 2010

Since its introduction in 1993, Mineral Trioxide Aggregate (MTA) has been shown to be superior to others in sealing, biocompatibility, and many other aspects of clinical endodontics. MTA is primarily Portland cement with bismuth oxide as a radiopacitifier. Although some studies suggested that the reasonable-priced Portland cement could be used instead of MTA, but MTAs are different from Portland cement in its composition, especially in heavy metal contents. Therefore, clinicians should be meticulous adapting the Portland cement as a MTA substitute.

• Restorative Dentistry and Endodontics
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• 제35권4호
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• pp.302-305
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• 2010

하악소구치의 근관형태는 매우 다양하다. 특히, 근단공까지 분리주행하는 세 개의 근관을 갖는 하악 제2소구치는 매우 드물다. 본 증례는 하악 제2소구치의 드문 근관형태를 기술하고, 상기 치아들에서 본 증례와 같이 세 개의 근관이 존재한다는 이전의 연구들을 뒷받침하고 있다.

• Restorative Dentistry and Endodontics
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• 제36권6호
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• pp.506-509
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• 2011

피하기종은 치과치료 시 나타날 수 있는 합병증의 하나로서, 발치, 근관치료, 수복치료 등과 연관되어 발생할 수 있다. 피하로 유입된 공기는 부종과 염발음을 일으키며 일반적으로는 주변 결합조직에 의해 그 범위가 한정되나 많은 양의 압축공기가 유입될 경우 근막공간을 통해 중격동, 흉막공간, 심지어 후복막에까지 영향을 미칠 수 있어 생명을 위협하는 합병증으로 발생할 수도 있다. 이번 증례는 파절선을 관찰하던 도중에 피하기종이 발생한 환자에 대한 증례로서 그 원인과 관리, 예방법에 관해 고찰해보고자 한다.

• Restorative Dentistry and Endodontics
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• 제36권6호
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• pp.510-514
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• 2011

Mineral trioxide aggregate (MTA)는 치근 천공을 수복하기 위한 생체적합성이 우수한 재료로 소개되었으며 현재 근관 치료의 다양한 분야에서 사용되고 있다. MTA는 전통적인 수복재료와는 달리 수분이 있는 환경에서 경화되는 특징이 있다. 임상에서 흔치는 않지만 경화되지 않은 MTA가 관찰되는 경우가 있으나 이의 원인은 불명확하며 관련된 연구도 많지 않다. 본 증례는 정 방향 MTA 충전 6년 후 MTA가 소실(wash-out)된 환자에 대한 증례로서 그 원인에 대해 고찰해보고자 한다.

• Restorative Dentistry and Endodontics
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• 제36권1호
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• pp.66-71
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• 2011

현 증례보고는 백색 병소의 치료에 있어 Icon (DMG)을 사용한 레진 침투법과 Opalustre (Ultradent Products, Inc.)를 사용한 미세연마술의 효과를 비교하였다. 현 연구의 결과는 비록 두 치료 방법 모두가 백색 병소를 완전히 제거하지는 못하였으나, 레진 침투법이 좀 더 효과적임을 보여주었다. 따라서 레진 침투법은 백색 병소의 치료에 우선적으로 선택될 수 있으며, 이 때 증례 선택에 주의를 기울여야 할 것이다.

• Restorative Dentistry and Endodontics
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• 제29권3호
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• pp.233-238
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• 2004

The purpose of this study was to evaluate the effect of immediate or delayed composite resin filling on dentinal microtensile bond strength (${\mu}TBS$) after applied the adhesive. The coronal dentin of human third molars was exposed. Single-Bond or One-Step was applied on the dentin surfaces. and composite resin were constructed immediately (group 1) or 5min., 10min., 15min., 20min. and 30min. (groups 2-6) after an adhesive was applied. The specimens were sectioned and made bar-shaped. Each surface area of them was about $1\textrm{mm}^2$. The ${\mu}TBS$ test was performed by EZ test. The results were analysed by One-way ANOVA and Tukey's test at 95% significance level. The results suggested that the ${\mu}TBS$ of Single-Bond to dentin was decreased when the composite resin was constructed 20min. and 30min. after Single-Bond was applied. But the ${\mu}TBS$ of One-Step was not affected by delayed composite resin filling.

• Restorative Dentistry and Endodontics
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• 제29권3호
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• pp.205-211
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• 2004

This study evaluated the microleakage and interfacial gap between enamel and composite resin under the dry and wet condition of the enamel surface. V shaped class 5 cavities were prepared on the occlusal portion of extracted human molars. Samples were divided into three groups：D group (air dry for 10-15s), BD group (blot dry with moist cotton pellet), and DR group (air dry for 10-15s and rewet with Aqua-Prep F for 20s), Cavities were filled using Aelitefil composite resin after applied One-Step. Microleakage was tested by 2% methylene blue dye solution and the data were statistically analysed by Kruskal-Wallis test and Mann-Whitney test. Also Enamel-resin interface was observed under SEM. Group BD showed statistically lower microleakage than group D (p < 0.05). but there was no statistically significant difference between group BD and DR (p > 0.05). At the enamel-resin interface, group D showed the gap of $2{\;}{\mu}m$ thickness, but group BD and DR showed close adaptation. In conclusion, the use of blot dry and rewetting agent (Aqua-Prep F) resulted in decreased microleakage and improved adhesion between enamel and resin when using One-Step.

• Restorative Dentistry and Endodontics
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• 제29권2호
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• pp.153-161
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• 2004

This study investigated that the effect of rewetting agent on dentinal microtensile bond strength(${\mu}TBS$). Human molars were sectioned to expose the superficial dentin surfaces. Samples were divided into two groups according to type of adhesives-Single Bond (S) and One-Step (0)], and again subdivided into five groups by different dentin surface treatment-dry for 15s (D), blot dry (BD) or dry for 15s, and rewet with different rewetting agents [distilled water (DW), Gluma Desensitizer (GD) and Aqua-Prep (AP)] for 30s. After application of adhesive, composite resin was built up on the bonding surface. Each tooth was sectioned to obtain stick with $1\textrm{mm}^2$ cross sectional area and the ${\mu}TBS$ was determined by EZ test. In the S group, the mean ${\mu}TBS$ of GD, AP, and BD group was significantly higher than that of DW and D group (p < 0.05), In the O group, the mean, ${\mu}TBS$ of AP, GD, BD and DW group was significantly higher than that of D group (p < 0.05). The data suggested that Gluma Desensitizer and Aqua-Prep could be successfully used as rewetting agents, and Distilled water could be acceptable in aceton based adhesive system only.

• Restorative Dentistry and Endodontics
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• 제29권3호
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• pp.212-218
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• 2004

The purpose of this study was to quantify the amount of remaining gutta-percha/sealer on the walls of root canals when three types of nickel-titanium rotary instruments (Profile. ProTaper and $K^3$) and a hand instrument(Hedstrom file) used to remove these materials. The results of this study were as follows: 1. In the total time for gutta-percha removal. Profile group was the fastest and followed by $K^3$, Protaper, Hedstrom file group. 2. In case of the evaluation of the volume of remained gutta-percha from radiograph. $K^3$ group got the highest score and followed by Protaper. Hedstrom file. Profile group in the apical 1/3. 3. In case of the evaluation of the volume of gutta-percha remained from stereomicroscope, $K^3$ group got the highest score and followed by Protaper. Hedstrom file. Profile group in the apical 1/3. These results showed that instrumentation using nickel-titanium rotary instrument groups was faster than that using hand instrument group. The effect of gutta-percha removal using Profile group was better than that using Protaper and $K^3$ group in the nickel-titanium rotary instrument groups.