• 대한기관식도과학회지
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• 제5권1호
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• pp.14-21
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• 1999

Perforating injury of the thoracic esophagus leads to an almost Immediate exposure of the mediastinum to both oral secretions and refluxed gastric contents. And necrotizing inflammatory response developed inevitably. So, without proper managements, mediastinitis results in severe dehydration or septic conditions, and consequently the life of the patient can be threaten. We experienced recently 4 cases of esophageal perforation. Three cases were Boerhaave's syndromes and the other one was instrumental perforation in patient with corrosive esophageal stricture. Curative surgical procedures were done in 3 cases and the drainage procedure was only possible in the other one due to hepatic failure. And the patient with the drainage management was dead.

• 영어어문교육
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• 제7권1호
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• pp.179-208
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• 2001

Using literary materials as resources for English learning rather than an object of literary study can be a genuine tool for the students to learn English in the form of oral and written communication. This case study treated the applications of a whole text to the overall course divided into pre-reading activities, while-reading activities, and post-reading activities and the applications of some partial passages extracted from various texts to teaching objectives with many levels of difficulty. This study found that literary texts could be good materials to teach the target language in EFL setting. The English-speaking students with little linguistic competence as a foreign language may be limited in learning English at first, but soon they can accelerate their linguistic competence by reinforcing the literary competence through the literary texts. To achieve effectively a desired goal through the use of literary texts as resources for language development several concrete techniques should be introduced: teacher-guided question strategies laying a central emphasis on the text itself, a problem-solving ability through student-centered activities, process-based and open-ended activities should be presented in a variety of ways using many appropriate activities according to teaching procedure with a careful selection of the texts.

• 대한치과마취과학회지
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• 제13권3호
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• pp.103-110
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• 2013

Background: Recently the use of sedation by pediatric dentists in Korea is increased. This study describes training programs about sedation practices in Korean pediatric dentistry residency program. Methods: A questionnaire was filled in by participants of Korean Academy of Pediatric Dentistry on 17th-18th August, 2008. Also the data about sedation practices of the training institution is collected by phone call. Results: Seventy two percent of respondents used sedation. Most of them used sedation with agents under 25% of their patients. Distribution of ages in patients sedated with agents was 3 years, 4-5 years, under 2 years, 6-10 years, and more than 10 years. Determinative factors of using sedation were behavior management, number of visiting, amount of treatment and general condition, and oral route was the most favorable route. Sixty six percent of them have failed on sedation, and thity percent of them have rarely failed on sedation. Only fifty percent of dentists using sedation completed the cardiopulmonary resuscitation course. Conclusions: For safety, dentists using sedation need to be educated about emergency equipment and management. Especially medication dose, use frequency and the detail related to treatment procedure should be discussed carefully. Also putting a patient under general anesthesia and taking emergency measures should be discussed with Korean Dental Society of Anesthesiology.

• Journal of Periodontal and Implant Science
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• 제23권3호
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• pp.647-658
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• 1993

The purpose of this study is to examine the influence of 5% tetracycline(Tc) gel on healing of gingival tissue and change of diseased root surface when used with nonsurgical procedure. 7 patients with advanced periodontitis were received thorough scaling and root planning, followed by saline irrigation on 10 randomly selected control teeth and Tc gel application for 5 minutes with specifically designed plastic instrument of 10 test teeth in contralateral side. At 0, 1, 7, 14, and 21 days after treatment, biopsy and extraction were carried out. At day 7, Tc group showed decreased inflammation and delayed proliferation of pocket epithelium in comparison with control group which was continued for all experimental days. Scanning electron microscopic finding revealed demineralized and cleaned root surface with exposed dentinal tubules in Tc gel group. In the present study, clinically successful result is expected with combined use of nonsurgical periodontal therapy and intrapocket application of Tc gel.

• 대한소아치과학회지
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• 제25권3호
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• pp.499-505
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• 1998

Idiopathic gingival hyperplasia is a rare condition of undetermined etiology. The enlargement is usually associated with the emergence of the teeth into the oral cavity and may regress after extraction. The enlarged gingiva may be primarily attributed to hyperplasia of the subepithelial layer that is relatively avascular and consists of densely arranged collagen bundles and numerous fibroblasts. The recommended time for treatment is after completion of eruption of permanent teeth. But the most important thing is the patient's psychological and esthetic needs. Lately, Schluger has proposed modified gingivectomy procedure with horizontal, internal beveled incision for thinning of the flap resulting in less pain and bleeding after treatment, minimal opportunity of infection. The purpose of this report is to document a case of 8-year-old girl who had registered in Dept. of Pediatric Dentistry of Seoul National University dental hospital for treatment of her gingival hyperplasia and delayed tooth eruption

• 구강회복응용과학지
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• 제29권4호
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• pp.384-390
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• 2013

가철성 국소의치의 장착 과정을 적절하게 시행하였다면 장착 후의 문제들을 최소화할 수 있으나, 그럼에도 불구하고 기능, 심미, 발음상의 문제나 불편감 등의 문제들이 발생할 수 있다. 가철성 국소의치 장착 후 1주일 이내에 점검을 위한 약속이 이루어져야 한다. 환자들에게 의치를 사용하는 동안 겪었던 문제들에 대해 질문하고 구강조직과 의치를 철저히 검사해야 하며, 검사 과정 동안에 조직 손상 등을 발견할 수도 있다. 그리고 그 원인을 진단하고 적절한 치료를 시행하여 이러한 문제들을 해결하도록 해야 한다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제40권
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• pp.2.1-2.7
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• 2018

With the development of computer-aided design/computer-aided manufacturing (CAD/CAM) technology, it has been possible to reconstruct the cranio-maxillofacial defect with more accurate preoperative planning, precise patient-specific implants (PSIs), and shorter operation times. The manufacturing processes include subtractive manufacturing and additive manufacturing and should be selected in consideration of the material type, available technology, post-processing, accuracy, lead time, properties, and surface quality. Materials such as titanium, polyethylene, polyetheretherketone (PEEK), hydroxyapatite (HA), poly-DL-lactic acid (PDLLA), polylactide-co-glycolide acid (PLGA), and calcium phosphate are used. Design methods for the reconstruction of cranio-maxillofacial defects include the use of a pre-operative model printed with pre-operative data, printing a cutting guide or template after virtual surgery, a model after virtual surgery printed with reconstructed data using a mirror image, and manufacturing PSIs by directly obtaining PSI data after reconstruction using a mirror image. By selecting the appropriate design method, manufacturing process, and implant material according to the case, it is possible to obtain a more accurate surgical procedure, reduced operation time, the prevention of various complications that can occur using the traditional method, and predictive results compared to the traditional method.

• 대한심미치과학회지
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• 제26권1호
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• pp.24-38
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• 2017

치과 임상에서 보철 과정은 1) 치아 삭제 2) 임시 수복물 제작 3) 포스트와 코어 4) 인상채득 5) 최종 보철물 합착의 순서로 진행된다. 보철 과정의 마지막이 정확한 적합과 교합 관계를 갖는 최종 보철물을 환자의 지대치의 적합시키는 과정이다. 그런데, 이 최종 보철물은 진료실에서 만들어지는 것이 아니라, 치과 기공실에서 만들어져서 약간의 시간차를 두고 진료실로 오게 된다. 진료실에서 환자의 구강 내 정보를 기공실로 전달하는 유일한 매체는 인상체이다. 그런데 이 과정에서 수 많은 오차가 발생된다. 치과 의사와 치과 기공사는 이 오차를 줄이기 위해 원인을 파악하고 정확한 보철물 제작을 위해 노력해야 한다.

• 대한두개안면성형외과학회지
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• 제16권1호
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• pp.29-30
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• 2015

In cleft palate surgery, the environment is especially critical when suturing. Encum-bered, obstructive space in the environment can hinder a suture while using the Dingman mouth gag. We introduced a novel but simple draping technique. A simple hand towel is placed over the gag. A hole is cut out in the middle according to each patient's mouth. After making the hole, the hand towel is soaked in water and gently squeezed. Then the towel is properly placed over the Dingman mouth gag. Dripping water on the hand towel during the suture helps keep it in place. Using this draping technique, we cut 14 minutes of operation time compared to the average operation time of the past 2 years. There were several disadvantages in previous draping method. First, long suture material may easily get caught. Second, the operation field can easily be contaminated. Third, focusing on the operation becomes difficult due to the obstruction. This draping technique can compensate for the disadvantages of the previous Dingman mouth gag.

• Mass Spectrometry Letters
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• 제9권4호
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• pp.95-99
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• 2018

An innovative, simple, and rapid assay method based on liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) was developed and validated for the simultaneous determination of eight statin drugs in human urine. A simple sample clean-up procedure using the "dilute and shoot" (DAS) approach enabled a fast and reliable analysis. The influence of the dilution factor was investigated to ensure detectability and reduce the matrix effect. Chromatographic separation was performed on a Phenomenex Kinetex C18 column ($50{\times}3.0mm$ i.d., $2.6{\mu}m$) using an elution gradient of mobile phase A composed of 0.1% acetic acid, and mobile phase B composed of acetonitrile, at a flow rate of 0.35 mL/min. Quantitation was performed on a triple quadrupole mass spectrometer operated in multiple reaction monitoring (MRM) mode using electrospray ionization in positive ion mode. The total chromatographic run time was 15 min. The method was validated for selectivity, sensitivity, recovery, linearity, accuracy, precision, and stability. The present method was successfully applied to the analysis of Rosuvastatin in urine samples after oral administration to healthy human subjects.